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Hire vetted A/B testing developers, engineers, programmers, coders, architects, and consultants on demand. Leading companies choose A/B testing freelancers from Toptal for their most important development projects.
The Toptal developer was instrumental in building the prototype and helped accelerate our time to raise funds by several weeks.
Vinod Kumar Ramachandran, Co-founder & CEO, Big Sur AI
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Featured Talent

Vlad Zotov
A/B Testing Developer
Vlad is a passionate learner and systems thinker. Curiosity is his main driver, propelling him to explore diverse fields and new concepts. Vlad believes in the power of A/B testing and data-driven decision-making. Over the past 10 years, he's tackled various challenges ranging from front-end and distributed systems to data analysis. Vlad takes ownership of the issue and produces quality solutions. He enjoys learning and can quickly pick up languages and frameworks, and he enjoys helping others.

Shabeer S Hussain
A/B Testing Developer
Shabeer is a senior iOS engineer with 13+ years of experience and is fluent in Swift, Objective-C, SwiftUI, and UIKit frameworks. He has extensive experience in iOS app development, release management, and maintenance of CI/CD pipelines from working in large corporate companies and small-scale startups. Shabeer is interested in back-end development using Swift Vapor and event-driven serverless architecture using Firebase Firestore and Firebase functions to complement his mobile expertise.

Tory Borsboom-Hanson
A/B Testing Developer
Tory is a data scientist and forecasting specialist with extensive experience in experimental design, AB testing, and leadership roles. His stack of choice includes Python, SQL, Pandas, PySpark, Hadoop, MLFlow, XGBoost, and Scitkit-learn. Beyond data science and model development, he is an expert at data visualization and reporting, especially to non-technical audiences. He often remarks that "a poorly presented analysis can often be worse than no analysis at all."

Zachary A. Goodman
A/B Testing Developer
Zack is an experienced Silicon Valley data science consultant with expertise in experiments, causal effect estimation, and cloud data tools. He holds a PhD in economics with a research focus on estimating causal effects using big data. Zack has over eight years of experience using Python, SQL, and other tools to answer questions using data. He enjoys helping his clients achieve their goals, whether building data pipelines, automated dashboards, or slide decks for company leadership.

Draco Li
A/B Testing Developer
Draco is a seasoned lead engineer with over 12 years of extensive full-stack experience in various industries, including online retail, web3, and AI insurance. As a founding engineer at Dots, Draco spearheaded the launch of highly acclaimed iOS apps, TwoDots (50+ million downloads) and Dots & Co (1.5+ million downloads within two days). He also served as the engineering lead at Loose Button, where he launched an online advertising network that grew to over $1 million in sales in three months.

Anthony Khong
A/B Testing Developer
Anthony is an experienced data scientist and developer with a demonstrated history of working in research, algorithmic trading, and technology consultancy. He is skilled in software development, statistical analysis, and machine learning. Anthony is a strong entrepreneurship professional with an MSc in applied statistics from the University of Oxford and an MPhil in economics research from the University of Cambridge.

Julius Arden
A/B Testing Developer
Julius is a full-stack software engineer and engineering manager with 10+ years of professional experience. He has worked in multiple sectors, including marketplace, edutech, and fintech, and in companies ranging from early-stage startups to multinationals. Julius leverages his varied experience to remain flexible and pragmatic while delivering and maintaining clean code. He had experience working in microservices utilizing Kubernetes in GCP.

Artem Sukiasyan
A/B Testing Developer
Artem is a senior software engineer with 20+ years of career history focused on supporting different software systems. He has experience-backed expertise in back-end system creation with different technology stacks as well as strong skills in analysis, design, development, testing, and implementation of various applications. Artem is a supportive and enthusiastic team player who never gives up and prides himself on his efficient problem-solving abilities.

Daniel Schaefer
A/B Testing Developer
Daniel is a software engineer with 17+ years of experience specializing in implementing DevOps. As part of an engineering team, he enjoys developing applications while owning code, tests, builds, deployments, infrastructure, and monitoring. Daniel believes in scalable, reliable, testable, and maintainable code.

Mikhail Rakhmalevich
A/B Testing Developer
With 15 years of experience in software engineering, Mikhail has honed his skills in creating robust, user-friendly mobile and web applications. His extensive expertise spans various domains, including fintech, well-being, and social networking. Mikhail's career progression has seen him evolve from a passionate developer to a proficient product manager and project leader, known for his strategic vision and ability to lead cross-functional teams to success.

Nurzhan Dyussenaliyev
A/B Testing Developer
Nurzhan has worked for Google in London as an Android software engineer since mid-2016. Before joining Google, while at university, he created his own Android app (kuran.kz), which has over a million downloads and 4.9 stars! He also completed internships at Facebook and imo.im, a video messaging startup, both in Silicon Valley. Having participated and won many sport programming competitions in high school and university, Nurzhan programs quickly and in an optimized way.

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Our talent network is composed of thoroughly vetted professionals who ramp up quickly, function as essential team members, and deliver results.
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Why Organizations Choose Toptal®

Toptal gave us access to the best designers out there, saving us a lot of time and allowing us to build the best possible product.
Thierry JakircevicGeneral Manager, Digital Solutions, Bridgestone

Toptal’s talent is really excellent. They are able to work through large business problems and code incredibly efficiently.
Emily LemonSenior Director, Cleveland Cavaliers

The kind of people we looked for were hard to find. Toptal helped us achieve our goals by bringing high quality resources to bear on very short notice.
Elmar PlatzerDigital Transformation Leader, CSR

If you’ve tried working with other vendors, Toptal is going to be a different type of company to work with; they’re going to meet you where your needs are.
Matthew SchumacherSenior Product Manager, Alpha - Precision Drilling
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