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Math & Programming Tutor - University Educator
Alexander J.

4.9 (57 ratings)

321 hours tutoring

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About Alexander

Bio

I'm a Computer Science graduate from Texas A&M University-San Antonio with four years of teaching experience, working with everyone from middle-school students in summer programs to senior-level college students. I've taught both in classroom settings of twenty to thirty students and in intensive one-on-one sessions, which taught me to quickly read how a student processes information and adjust my approach on the spot.

I specialize in college math and programming, and I'm just as...

I'm a Computer Science graduate from Texas A&M University-San Antonio with four years of teaching experience, working with everyone from middle-school students in summer programs to senior-level college students. I've taught both in classroom settings of twenty to thirty students and in intensive one-on-one sessions, which taught me to quickly read how a student processes information and adjust my approach on the spot.

I specialize in college math and programming, and I'm just as comfortable rescuing a struggling student a few lessons before a final as I am building long-term mastery from the ground up. What students tell me sets me apart is that I break problems down to the underlying logic and focus on the why behind the code rather than memorizing syntax, and I stay patient until a concept genuinely clicks. Several students have come to me mid-semester, close to failing, and turned their course around in just a handful of sessions.

On the programming side I tutor Python, Java, C, C#, data structures and algorithms, machine learning, data science and analytics, cybersecurity, and Linux. On the math side I cover the full track, from algebra, geometry, and trigonometry through precalculus, calculus, linear algebra, differential equations, statistics, and SAT Math.

My lessons are online and hands-on. We work in real code and on a shared whiteboard, so you leave each session with something you can actually run, review, and reuse. If you're stuck on an assignment, prepping for an exam, or just want to get ahead, message me with what you're working on and your deadline, and I'll tell you exactly how I can help.

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Education

Texas A&M University-San Antonio
Computer Science

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Approved Subjects

Algebra 1

Algebra 1

Algebra 1 is the foundation of so much that comes after it — in math, in science, and even in programming — and I know firsthand how important it is to get that foundation right. As an official Math and Computer Science Tutor at Texas A&M San Antonio for over three years, I worked with students at all levels, and foundational algebra was one of the most common areas where I helped students build real confidence and clarity. I have a natural ability to simplify complex concepts and meet students where they are, which is especially important in Algebra 1 where many students encounter math anxiety for the first time. My approach focuses on building genuine understanding rather than just memorizing steps — so students don't just get through the homework, they actually retain the material and feel prepared going forward. My background in Computer Science also gives me a unique perspective on algebraic thinking, as logical reasoning and problem-solving are at the core of everything I do professionally. Whether you're struggling with solving equations, graphing lines, working with inequalities, or understanding functions, I'll break it down in a way that finally makes it click.
Algebra 2

Algebra 2

Algebra 2 is where math starts to get genuinely interesting — and where many students start to feel left behind. As an official Math and Computer Science Tutor at Texas A&M San Antonio for over three years, I helped students navigate exactly this transition, building on their Algebra 1 foundations and developing the deeper analytical thinking that Algebra 2 demands. My Computer Science background gives me a uniquely practical lens for teaching Algebra 2 concepts. Topics like functions, logarithms, polynomials, and complex numbers aren't abstract to me — they're tools I actively use in programming, data analysis, and algorithm design. I can show students how these concepts connect to the real world, which makes them far easier to understand and remember. I pride myself on being patient, clear, and adaptive in my teaching style. I know that every student struggles differently, and I take the time to identify exactly where the confusion starts before building back up with confidence. Whether you're working through quadratic equations, exponential functions, sequences and series, or conic sections, I'll make sure you not only keep up — but genuinely understand the material and feel prepared for what comes next
C

C

C is the language that sits closest to the hardware, and mastering it builds a level of programming intuition that makes you better in every other language you work in. As a Computer Science graduate from Texas A&M San Antonio with a strong systems programming background, I have extensive experience with C through coursework in Operating Systems, Algorithms, and Software Engineering — areas where low-level programming and memory management are front and center. My broader background in C++ and systems-level development means I have a deep understanding of the concepts that make C both powerful and challenging — pointers, memory allocation, data structures, and the relationship between code and hardware. These aren't topics I just studied; they're fundamentals I've applied hands-on across multiple projects and continued to build on throughout my career as a developer. As an official Math and Computer Science Tutor at Texas A&M San Antonio for over three years, I regularly helped students work through some of the most notoriously difficult CS coursework, and C-related material was often at the center of it. I know exactly where students tend to get stuck — whether it's pointer arithmetic, segmentation faults, dynamic memory management, or understanding the stack versus the heap — and I have a proven ability to break these concepts down in a way that finally makes them click. Whatever level you're at, I'll help you build the confidence and understanding to tackle C with clarity.
C#

C#

I hold a degree in Computer Science and have extensive experience programming in C#, with a strong command of object-oriented principles, the .NET ecosystem, and modern language features such as LINQ, async/await, and generics. My academic foundation combined with real-world development experience allows me to guide students through everything from basic syntax and control flow to more advanced topics like class design, interfaces, and application development. I can effectively support students working in a variety of C# contexts, including console applications, Windows Forms, Unity game development, and web development with ASP.NET. My approach focuses on building genuine understanding rather than just solving immediate problems, so students walk away more confident and capable in every session.
Calculus

Calculus

Calculus is the mathematical backbone of computer science, artificial intelligence, and engineering — and as a Computer Science graduate from Texas A&M San Antonio with over three years of official university tutoring experience, I bring both deep academic understanding and genuine real-world application to every Calculus session. The concepts at the heart of Calculus — derivatives, integrals, limits, and rates of change — are tools I actively use in my AI and machine learning work, where optimization algorithms and gradient-based learning are fundamental to everything I build. My experience developing neural machine translation models and LLM-powered applications means I can show students exactly where Calculus lives outside the classroom. When I explain concepts like optimization, the chain rule, or convergence, I can ground them in real, tangible applications that make the theory far more intuitive and compelling. This perspective is something most tutors simply can't offer. As an official Math and Computer Science Tutor at Texas A&M San Antonio for over three years, I helped students work through some of the most challenging math coursework at the university level. I understand that Calculus is where many students hit a wall for the first time, and I have a proven ability to identify exactly where confusion begins and rebuild understanding from there with patience and clarity. Whether you're working through limits and continuity, differentiation, integration, or multivariable topics, I'll make sure you develop genuine intuition for the material and the problem-solving skills to confidently handle whatever your course throws at you.
Computer Programming

Computer Programming

I'm a Computer Science graduate from Texas A&M San Antonio with hands-on experience across the full software development stack. I've built production-level applications from the ground up — including a fully deployed web platform with custom backend architecture, database schema design, and frontend development — so I don't just teach theory, I bring real-world context to every concept. I spent over three years as an official Math and Computer Science Tutor at Texas A&M San Antonio, where I helped students tackle everything from introductory programming to advanced algorithms and data structures. I have a knack for breaking down complex technical concepts into clear, digestible explanations, and I tailor my approach to each student's learning style. My programming experience spans Python, Java, C++, and JavaScript, with additional expertise in AI/ML frameworks like TensorFlow and PyTorch, and database management. Whether you're struggling with your first for-loop or preparing for technical interviews, I can meet you where you are and help you level up with confidence.
Computer Science

Computer Science

I hold a Bachelor's degree in Computer Science and served as the Lead Math and Computer Science Tutor at Texas A&M University San Antonio for three years. During my tenure, I successfully conducted over 600 tutoring sessions, helping students master complex programming concepts, algorithms, and mathematical foundations. My extensive hands-on experience spans multiple programming languages, software development principles, and computational problem-solving techniques. I specialize in breaking down challenging technical concepts into digestible steps that help students build confidence and achieve academic success in computer science coursework.
Cybersecurity

Cybersecurity

I hold a degree in Computer Science and have completed a dedicated Cybersecurity certificate program at the college level, providing me with both broad technical knowledge and focused training in security concepts. My coursework covers core cybersecurity domains including network security, cryptography, threat analysis, vulnerability assessment, ethical hacking concepts, and security best practices. I am well-equipped to help students working through cybersecurity fundamentals, security operations, risk management, and related topics at both introductory and advanced levels. I take a structured, concept-first approach to tutoring, ensuring students not only understand the material for exams but also develop the critical thinking skills essential for a career in cybersecurity.
Data Analysis

Data Analysis

Data Analysis is a discipline I have applied extensively both in my professional work as a software developer and in my academic career as a Computer Science graduate from Texas A&M San Antonio. With dedicated coursework in Data Analysis, hands-on project experience processing and analyzing large-scale datasets, and real-world application of industry-standard tools, I bring a comprehensive and deeply practical expertise to this subject that goes well beyond what most tutors can offer. My technical Data Analysis toolkit is extensive and battle-tested. I have applied Pandas and NumPy extensively for data cleaning, transformation, and preprocessing across large and complex datasets, and I have used R for rigorous statistical validation and evaluation metric development on machine learning projects. I understand not just how to run the analysis, but how to design it correctly from the start — choosing the right methods, handling messy real-world data, and interpreting results with statistical rigor. My project experience demonstrates this depth directly. Processing large parallel language corpora for my neural machine translation model required sophisticated data pipeline design, custom preprocessing logic, and careful evaluation of data quality at scale — all core Data Analysis competencies applied in a demanding, real-world context. Additionally, my participation in the Rowdy Datathon further sharpened my ability to rapidly analyze complex datasets, identify meaningful patterns, and derive actionable insights under pressure and tight time constraints. Whether you are working through descriptive statistics, data cleaning and wrangling, exploratory data analysis, visualization, or statistical inference, I have the hands-on expertise and proven ability to communicate complex analytical concepts clearly and effectively, ensuring you not only complete your coursework but develop the practical skills that make a real difference in the field.
Data Science

Data Science

Data Science isn't just something I've studied — it's something I do. As a Computer Science graduate from Texas A&M San Antonio with hands-on experience building production-level AI and machine learning systems, I bring a depth of practical expertise to Data Science tutoring that goes well beyond the textbook. My real-world Data Science experience spans the full pipeline. I've processed and cleaned large-scale parallel language corpora using custom tokenization pipelines, built and optimized neural network architectures using PyTorch and TensorFlow, and applied statistical validation techniques using R to evaluate model performance. I've worked with industry-standard tools including Pandas and NumPy for data manipulation and preprocessing, and I have extensive experience developing and applying evaluation metrics to measure the performance of complex machine learning models. My project experience speaks directly to the depth of my Data Science skillset. Building a Japanese-to-English neural machine translation model required mastery of corpus preprocessing, feature engineering, model architecture design, and GPU-optimized training — all core Data Science competencies applied at a sophisticated level. My LLM-powered vulnerability detection project further demonstrates my ability to work with complex, structured datasets and extract meaningful insights to drive real decisions. Whether you're just getting started with data manipulation and visualization, working through statistical concepts, or diving into machine learning and predictive modeling, I have the hands-on expertise and teaching experience to guide you through it clearly and effectively
Data Structures

Data Structures

I hold a degree in Computer Science, where Data Structures was a core part of my curriculum, giving me a deep and thorough understanding of how data is organized, stored, and manipulated efficiently in software. I have hands-on experience implementing and applying a wide range of data structures including arrays, linked lists, stacks, queues, trees, graphs, hash tables, and heaps, primarily in C++ and C#. My background in software development means I can not only explain these concepts theoretically but also demonstrate their real-world relevance, helping students understand why choosing the right data structure matters in practice. I focus on building intuition for problem-solving so students can confidently analyze time and space complexity, tackle coding assignments, and prepare for technical interviews.
Differential Equations

Differential Equations

I tutor differential equations including first-order and higher-order linear equations, separable and exact equations, systems, Laplace transforms, and series solutions. With a Computer Science degree and a strong applied-math foundation, I emphasize both solving techniques and understanding what the equations actually model. I break each method down clearly so students know which approach to reach for and why. I'm also comfortable connecting the material to numerical and real-world applications when that helps it click.
GED

GED

I help GED students prepare with patience and a focus on building confidence, especially in the math and quantitative reasoning sections. Having taught students of all ages and backgrounds, I'm comfortable working with adult learners returning to school and meeting them wherever they're starting from. I break topics into clear, manageable steps and focus on the skills the test actually emphasizes. My goal is to help you pass and feel proud doing it.
General Computer

General Computer

I help students and adult learners build practical, everyday computer skills, from navigating operating systems and managing files to using the internet and email safely and getting comfortable with common software. With a Computer Science degree and experience teaching students of all ages and levels, I'm patient and never make anyone feel behind. I explain things in plain language with hands-on practice. My goal is for you to feel confident and independent using your computer.
Geometry

Geometry

Geometry asks students to reason logically and to visualize, which is exactly where I help most: proofs, angles, triangles, circles, area and volume, and coordinate geometry. My computer-science background makes me comfortable with the logical, step-by-step thinking that proofs require, and I teach it in a way that feels approachable rather than intimidating. I use clear diagrams and real examples to make abstract ideas concrete. I'll help you move from memorizing theorems to actually understanding how to apply them.
HTML

HTML

I tutor HTML as the foundation of web development, covering document structure, semantic elements, forms, links, images, tables, and accessibility basics. With a Computer Science degree and front-end experience, I help students write clean, well-structured markup and understand how HTML works together with CSS and JavaScript. I teach hands-on so you immediately see your code render in the browser. Whether you're building your first page or a full site, I'll guide you from the ground up.
Java

Java

Java is one of my core programming languages, developed and refined throughout my Computer Science degree at Texas A&M San Antonio and applied extensively in real-world software development projects. From object-oriented design principles to data structures and algorithms, I have a deep and practical understanding of what it takes to write clean, efficient Java code. As an official Computer Science Tutor at Texas A&M San Antonio for over three years, I regularly helped students work through Java-based coursework covering topics like algorithms, software engineering, and operating systems. I understand the common pitfalls students run into — whether it's grasping inheritance and polymorphism, debugging runtime errors, or understanding memory management — and I know how to guide students past them effectively. My real-world development experience means I can show you not just how Java works in the classroom, but how it's applied in production environments. Whether you're just getting started with the basics or tackling advanced topics like multithreading, design patterns, or data structures, I'll help you build the confidence and skills to succeed
Linear Algebra

Linear Algebra

Linear Algebra is one of the most powerful and applicable areas of mathematics, and it's one I engage with constantly in my professional work as a software developer and AI/ML practitioner. As a Computer Science graduate from Texas A&M San Antonio with over three years of official university tutoring experience, I bring both rigorous academic grounding and genuine real-world context to every Linear Algebra session. The concepts at the heart of Linear Algebra — vectors, matrices, transformations, eigenvalues, and vector spaces — are fundamental to the AI and machine learning work I do professionally. Building neural machine translation models and LLM-powered applications requires a deep working knowledge of linear algebraic operations, so when I teach these topics I can show students not just how they work, but exactly why they matter and where they show up in the real world. As a tutor, I understand that Linear Algebra can feel abstract and intimidating at first. My approach is to ground every concept in intuition before moving into formalism, so students develop a genuine understanding rather than just mechanical problem-solving ability. Whether you're working through matrix operations, systems of linear equations, determinants, orthogonality, or eigendecomposition, I'll guide you through it clearly and confidently, helping you build the mathematical foundation that opens doors in engineering, data science, and beyond.
Linux

Linux

I hold a degree in Computer Science with hands-on experience using Linux across both software development and cybersecurity contexts, giving me a well-rounded and practical understanding of the operating system. My skills cover core Linux fundamentals including the command line, file system navigation, permissions and user management, shell scripting, process management, and system configuration. Through my cybersecurity background, I also have experience with Linux in security-focused environments, which gives me additional depth when helping students working on networking, ethical hacking, or security coursework. I am comfortable helping students at any level, whether they are brand new to Linux or working through more advanced topics like bash scripting, package management, or setting up and managing servers.
Machine Learning/ AI

Machine Learning/ AI

Machine Learning and Artificial Intelligence are not just academic interests for me — they are the core of my professional work as a software developer and the area where my technical expertise runs deepest. As a Computer Science graduate from Texas A&M San Antonio with direct, hands-on experience building sophisticated AI systems from the ground up, I bring a level of practical knowledge to ML/AI tutoring that is genuinely difficult to find. My project experience sits at the cutting edge of what is being taught in university ML and AI courses today. I designed and built a full Japanese-to-English neural machine translation system leveraging a hybrid architecture combining BERT embeddings with LSTM-based sequence-to-sequence modeling, optimized for GPU cluster training using mixed-precision techniques and gradient checkpointing in PyTorch. This is not a simplified classroom exercise — it is a production-level deep learning system built with the same tools and techniques used by professional ML engineers in industry. Beyond translation, I developed an LLM-powered vulnerability detection system that parsed complex graph data structures representing real-world cybersecurity threats and fed them into a large language model for contextual, intelligent security recommendations. This project required a sophisticated understanding of how LLMs process and reason over structured data — a highly advanced and in-demand area of modern AI development. My technical toolkit includes TensorFlow and PyTorch for model development, Pandas and NumPy for data preprocessing, R for statistical validation, and deep familiarity with transformer architectures, natural language processing, and neural network design. Whether you are just beginning to explore supervised learning and neural networks or tackling advanced topics like attention mechanisms, fine-tuning large language models, or reinforcement learning, I have the real-world expertise and proven teaching ability to guide you to a genuine, deep understanding of the material.
Physics

Physics

I tutor introductory and algebra- or calculus-based physics, including mechanics, kinematics, forces, energy, momentum, and waves. With a strong math foundation, I help students connect the math they already know to the physics concepts, which is where many students struggle. I emphasize understanding the underlying principles and a clear problem-solving process rather than memorizing equations. I break each problem into steps so students learn a repeatable approach they can apply on their own.
Precalculus

Precalculus

Precalculus is one of the subjects I am most passionate about teaching, and it's an area where my tutoring experience has made a real, measurable difference in students' academic lives. As an official Math and Computer Science Tutor at Texas A&M San Antonio for over three years, I worked with a wide range of students tackling Precalculus — from those who just needed a little extra reinforcement to those who were genuinely struggling and needed someone to rebuild their confidence from the ground up. What I learned across hundreds of tutoring sessions is that Precalculus is rarely about a lack of ability — it's almost always about gaps in foundational understanding that were never properly addressed. I became very skilled at quickly identifying exactly where a student's confusion begins, and methodically filling those gaps in a way that makes the more advanced material suddenly feel approachable and manageable. I take genuine pride in those moments when a concept finally clicks for a student who had convinced themselves they just weren't a math person. My approach is patient, structured, and always tailored to the individual. I simplify complex ideas without dumbing them down, and I make sure students develop real understanding rather than just memorizing procedures. Whether you are working through function transformations, trigonometric identities, exponential and logarithmic functions, conic sections, or preparing for a Calculus course, I will meet you exactly where you are and make sure you leave every session more confident and more capable than when you arrived.
Probability

Probability

I tutor probability from the fundamentals through more advanced topics: counting and combinatorics, conditional probability, independence, random variables, distributions, and expected value. My computer-science and statistics background lets me explain probability both intuitively and rigorously. I focus on the word problems and setups students find hardest, helping them translate a confusing scenario into a clear calculation. My goal is for probability to feel logical rather than like guesswork.
Python

Python

Python is the language I work with most extensively in my professional and academic life, and it's one I'm genuinely passionate about teaching. As a Computer Science graduate from Texas A&M San Antonio, I've applied Python across a wide range of domains — from full-stack web development and database management to cutting-edge AI and machine learning projects using TensorFlow and PyTorch. My most advanced Python work includes building a custom Japanese-to-English neural machine translation model using transformer architectures, BERT embeddings, and GPU-optimized training pipelines — as well as developing an LLM-powered cybersecurity vulnerability detection system. These aren't classroom exercises; they're complex, real-world applications that gave me a deep, practical command of Python at a high level. As an official CS Tutor at Texas A&M San Antonio for over three years, I helped countless students navigate Python-based coursework in data analysis, algorithms, and artificial intelligence. I'm experienced with Python's most in-demand libraries including Pandas, NumPy, TensorFlow, and PyTorch, and I can guide students at any level — whether you're writing your first script or diving into data science and machine learning. I'll make sure you not only understand the code, but understand why it works.
SAT Math

SAT Math

I help students raise their SAT Math scores by combining solid content review with test-specific strategy and timing. I cover the algebra, problem-solving, data analysis, and advanced-math topics the exam tests, and I teach students to recognize question types and avoid common traps. With four years of teaching and a strong math background, I diagnose exactly where points are being lost and target those areas. We work through real practice problems so improvement shows up on test day.
Statistics

Statistics

I tutor statistics with a focus on genuine understanding: descriptive statistics, probability, distributions, hypothesis testing, confidence intervals, regression, and interpreting results correctly. My data-science and analytics work, which students have praised in my reviews, means I teach statistics as a tool for reasoning about real data, not just formulas to memorize. I'm comfortable supporting courses that use R, Python, or Excel alongside the theory. I'll help you both pass the class and understand what the numbers actually mean.
Trigonometry

Trigonometry

Trigonometry is one of those subjects that has a reputation for being confusing and overwhelming — and after three years of tutoring at the university level, I understand exactly why. As an official Math and Computer Science Tutor at Texas A&M San Antonio, I worked with countless students who came to me feeling lost in Trigonometry, and time and time again I was able to help them turn that frustration into genuine understanding and confidence. What I found working with students is that Trigonometry confusion almost always traces back to a few specific sticking points — the unit circle, understanding radians versus degrees, applying trigonometric identities, or visualizing how the functions behave graphically. Over years of tutoring I developed a very clear, intuitive way of explaining these concepts that consistently helped students move past the confusion and start seeing the bigger picture. I don't just show students the steps — I make sure they understand the logic behind them so they can handle problems they've never seen before. My approach is always patient, encouraging, and adapted to each individual student. I know how discouraging it can feel to sit in a Trigonometry class and feel like everyone else understands something you don't, and I create a judgment-free environment where students feel comfortable asking any question and working through material at their own pace. Whether you are struggling with the basics of sine, cosine and tangent, working through the unit circle, tackling inverse functions, or navigating trigonometric identities and equations, I will make sure you walk away with real clarity and the confidence to tackle your coursework head on.
JavaScript
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Ratings and Reviews

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4.9 (57 ratings)
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Reviews

Knowledgeable and Experienced Tutor

Alexander is a great tutor! He's very knowledgeable about the C programming topics we discussed. He was patient with me when I didn't understand something, and he broke it all down so I could get it. He went above and beyond to explain my semester C project and made sure I understood the logics and the underlying principles of the codebase. For my final exam, he helped me review the C core programming concepts. He was instrumental in helping me salvage this course, which I ended up passing with a decent grade, in just four lessons. That's how good he is. I only wish I'd found him sooner, and I would have aced my programming class. I will definitely be in touch with him for help with my future classes.

Ethan, 4 lessons with Alexander

Clear, Insightful, and Patient Instruction from a Skilled Tutor

This tutor demonstrated an impressive depth of knowledge in Python, data analytics, data visualization, algorithms and consistently explained concepts in a way that made them accessible and meaningful. This tutor has Exceptional Subject-Matter Expertise. Rather than focusing only on syntax or tools, they emphasized understanding the why behind the code, which greatly improved my grasp of key concepts and best practices. Their approach to data analytics was especially effective. They clearly explained how to structure data, apply analytical thinking, and interpret results, helping me connect raw data to real insights. When working with visualizations, the tutor went beyond simply creating charts—explaining how to choose the right visual, communicate findings clearly, and avoid common pitfalls. This significantly strengthened my ability to present data in a logical and impactful way. What truly set this tutor apart was their patience and ability to adapt explanations to my level of understanding. They took the time to break down complex topics, answered questions thoroughly, and ensured I felt confident before moving forward. Their teaching style fostered both technical skill development and conceptual clarity. Overall, this tutor provided outstanding guidance and support. I would highly recommend them to anyone looking to build strong foundations in Python, data analytics, visualization and algorithms while gaining a deeper understanding of the material as a whole.

Victor, 7 lessons with Alexander
Hourly Rate: $55
Response time: 2 hours
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