You will get Senior Full Stack Developer for Fintech & Financial Data Platforms
Top Rated
Project details
You will get a senior full stack developer for a fintech, financial data, trading, wealth management, or financial SaaS platform using Python, React, Next.js, Node.js, TypeScript, PostgreSQL, REST APIs, and cloud infrastructure.
I have 10+ years of experience building production systems, including engineering roles at UBS and Thomson Reuters. I was also the sole engineer behind the technology for two hedge fund launches and have built multiple financial data products from scratch.
I can help with financial dashboards, portfolio and reporting workflows, market data pipelines, broker or exchange integrations, payment systems, authentication, backend APIs, databases, cloud deployment, performance optimization, and production architecture.
This package covers one clearly scoped, production-ready fintech feature or integration, including technical review, implementation, source code, testing, and concise handover notes.
You receive secure, maintainable full-stack code designed for reliability, scalability, and future development. Please message me before ordering to confirm the scope, current technology stack, data sources, and expected deliverable.
I have 10+ years of experience building production systems, including engineering roles at UBS and Thomson Reuters. I was also the sole engineer behind the technology for two hedge fund launches and have built multiple financial data products from scratch.
I can help with financial dashboards, portfolio and reporting workflows, market data pipelines, broker or exchange integrations, payment systems, authentication, backend APIs, databases, cloud deployment, performance optimization, and production architecture.
This package covers one clearly scoped, production-ready fintech feature or integration, including technical review, implementation, source code, testing, and concise handover notes.
You receive secure, maintainable full-stack code designed for reliability, scalability, and future development. Please message me before ordering to confirm the scope, current technology stack, data sources, and expected deliverable.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included $2,000
These options are included with the project scope.
$2,000
- Delivery Time 14 days
- Number of Revisions 1
- Number of Pages 1
- Responsive Design
- Source Code
Frequently asked questions
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Didier M.
Jun 27, 2026
Design architecture of production infrastructure for a Fintech organization
Maksym designed and delivered the architecture for our production infrastructure at a fintech organization, and the result exceeded our expectations. He took the time to understand our requirements in depth and translated them into a clean, scalable, and well-documented architecture that fit both our current needs and our growth plans.
His deliverables covered the full requirements— accuracy, reliability, resilience, maintainability, and scalability. Maksym met every requirement we set out and consistently delivered state-of-the-art solutions in a timely fashion. He is detail-oriented, takes full ownership of outcomes, and holds his work to a high standard of quality.
Communication was clear throughout, and he was proactive about flagging trade-offs and recommending the approach he knows is right based on his extensive experience. We'd happily work with Maksym again and recommend him without hesitation to anyone building scalable production infrastructure.
His deliverables covered the full requirements— accuracy, reliability, resilience, maintainability, and scalability. Maksym met every requirement we set out and consistently delivered state-of-the-art solutions in a timely fashion. He is detail-oriented, takes full ownership of outcomes, and holds his work to a high standard of quality.
Communication was clear throughout, and he was proactive about flagging trade-offs and recommending the approach he knows is right based on his extensive experience. We'd happily work with Maksym again and recommend him without hesitation to anyone building scalable production infrastructure.
PM
Priyanka M.
Oct 27, 2025
Quantitative Developer for Live Trading Infrastructure
Maksym was highly professional, punctual, and a great communicator. His ability to provide actionable insights and complete the live trading infrastructure in a timely and thorough manner was really valuable.
Beyond his technical skills, Maksym has been a reliable team player, always willing to collaborate and share his knowledge. His ability to work independently while keeping us informed every step of the way made him a critical asset to the project.
Beyond his technical skills, Maksym has been a reliable team player, always willing to collaborate and share his knowledge. His ability to work independently while keeping us informed every step of the way made him a critical asset to the project.
SB
Sam B.
Aug 15, 2025
Full Stack Developer for Financial Data Product
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Peter B.
Jun 18, 2025
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Peter B.
May 16, 2025
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About Maksym
Senior Full Stack Developer | Python / React / Next | Ex-UBS / Reuters
100%
Job Success
Kyiv, Ukraine - 10:31 am local time
I build production SaaS platforms, trading systems, and data-heavy applications end to end, drawing on engineering experience at UBS and Thomson Reuters.
Clients usually bring me in when they need someone who can own more than one part of the stack — from product decisions and architecture to backend, frontend, data pipelines, deployment, and production issues.
I work primarily with Python, React, Next.js, and Node.js, building:
- SaaS platforms, MVPs, dashboards, and complex web applications
- Python and Node.js backends, REST APIs, authentication, and background jobs
- React and Next.js dashboards and analytics interfaces
- ETL pipelines, data normalization, and real-time financial data processing
- Integrations with payment providers, brokers, exchanges, and third-party APIs
- Cloud infrastructure, CI/CD, monitoring, and production architecture
My background is particularly useful for fintech and financial-data products, where software decisions are closely tied to data quality, reliability, infrastructure costs, and business constraints.
Recent work includes:
- Sole engineer for two hedge fund technology launches
- Launched three financial data products
- Reduced infrastructure costs for one financial data platform by 90%
- 5.0 Upwork rating with Top Rated status across 12 completed contracts
I’ve also built and operated my own financial SaaS product, so I tend to think beyond individual tickets. I care about what should be built, what can stay simple, and which technical decisions will matter six months from now.
If you're building a SaaS platform, Python backend, React or Next.js application, or financial data product, send me a message with a few details about what you're working on.
Steps for completing your project
After purchasing the project, send requirements so Maksym can start the project.
Delivery time starts when Maksym receives requirements from you.
Maksym works on your project following the steps below.
Revisions may occur after the delivery date.
Fintech scope and requirements
I review your financial product, users, data sources, current stack, APIs, security needs, and the fintech feature included in the agreed scope.
Architecture and full-stack development
I design the technical approach and implement the required backend, frontend, database, financial API, data pipeline, or integration work.