Fintech development isn't like building a typical SaaS product. The stakes are higher, compliance requirements are stricter, and the technical challenges are unique. Here are four real-world projects that showcase how we approach fintech development.
Case Study 1: Bank Credit Collection System
The challenge: build a flexible credit collection system accessible via VPN architecture. We delivered a complete system in 6 months using Oracle backend, ReactJS frontend, and .NET microservice architecture. The key was designing for process flexibility — the bank needed to change collection workflows without code changes.
Case Study 2: Rebuilding a Legacy Banking System
A Top 10 New York bank needed their outdated system rewritten. Rather than a complete rebuild (too risky for a live banking system), we took a selective approach: critical bugs got complete module rewrites, while non-essential issues received targeted fixes.
The tech stack spanned Java backend, .NET integration via API, and a migration from legacy ASP.NET to .NET web app with AngularJS. The team was massive: 10+ Java devs, 10 .NET devs, 28-person QA team, 4 business analysts, and 2 US client specialists.
Case Study 3: US Auditing Firm UX Improvement
A Top 4 US auditing company needed a complete UX overhaul within a strict 1-year deadline. Our strategy: separate the monolithic UI into independent modules and convert audit documentation into intuitive quiz-formatted flows. The result was a dramatically improved user experience delivered on time with 15 Ukrainian developers and 6 QA specialists.
Case Study 4: Multilevel Microservices Rebuild
A web analytics company needed to restructure their accounting and billing systems with external integrations (Zuora, Recurly, Plimus). We migrated from AngularJS to ReactJS, implemented Docker-based infrastructure with auto-scaling, and rebuilt the data layer on MySQL/Redshift with Redis caching and OLAP cubes. The team: 150 developers.
What all four projects have in common: deep understanding of financial regulations, comprehensive security practices, and the ability to communicate effectively with financial professionals who speak a different language than engineers.
