Open to opportunities

Oleh Bilous

@olehbilous

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Full Stack Engineer specializing in high-scale FinTech systems and backend optimization.

Ukraine

Message

What I'm looking for

I want a role building resilient, high-scale FinTech systems where I drive backend optimizations, mentor teams, and influence product strategy; open to relocation.

I am a Full Stack Engineer with four years of experience focused primarily in FinTech, delivering business-critical features and optimizing systems for scale and reliability. I have independently developed major modules, improved data processing speeds threefold, and reduced incident resolution time by about 40% while collaborating closely with Product, Design, QA, and clients.

My technical work spans backend and frontend stacks, cloud architecture, and automation; I mentor peers, drive technical discovery, and design architectures that improve platform stability and performance. I seek roles where I can continue building resilient financial ecosystems, lead system-level optimizations, and contribute to product strategy.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Engineer

Current

Nomi

Jan 2025 - Present (1 year 1 month)

Delivered MVP features and enhanced bank integrations for a next-generation finance platform, reducing incident resolution time by ~40% and improving data consistency across 150+ integrations.

TypeScript NestJS SQL Docker AWS REST APIs Jest CI CD

Full Stack Engineer

B2B FinTech SaaS Platform

Nov 2022 - Dec 2024 (2 years 1 month)

Independently developed a business-critical module used by 50+ clients, optimized core algorithms for a 3x performance boost, and designed a new notification architecture to improve response times.

TypeScript NestJS MySQL MongoDB Domain Driven Design AWS Performance Optimization

Full Stack Engineer

E-commerce Startup

Jun 2022 - Nov 2022 (5 months)

Built core product pages and end-to-end user features across frontend and backend, and presented technical functionality to business owners to align development with startup goals.