Nikolas Barwinski

Seasoned Senior Software Engineer with 11+ years of end-to-end product experience delivering high-availability web applications, APIs, and cloud-native platforms for fintech and B2B SaaS. I specialise in modern JavaScript/TypeScript across the stack, building resilient microservices and rich client experiences that scale to millions of requests with strict security and compliance requirements. My approach blends clean architecture, strong DevOps hygiene, and data-informed optimization to drive measurable gains in performance, reliability, and developer velocity. I've led the design and implementation of service-oriented backends, real-time features, and component libraries, consistently reducing latency, tightening CI/CD feedback loops, and improving incident MTTR. I partner closely with product, design, and customer teams to translate business goals into technical roadmaps, de-risk complex deliveries, and uphold quality through code reviews, automated testing, and observability-by-default practices. I thrive in distributed teams, mentoring engineers, standardising patterns, and championing incremental modernization—whether migrating legacy monoliths to modular services, introducing IaC and automated security checks, or evolving frontends to accessible, maintainable design systems. My work mindset is pragmatic and impact-oriented: ship value quickly, validate, iterate, and keep the system simple, observable, and secure.