Hi, I'm

Yevhen
Kotliarchuk

Fullstack Software Engineer

I deliver backend-heavy products end to end — from API design and third-party integrations to the interface that makes them usable. I turn complex business flows into maintainable systems that stay reliable under real production load.

Based in Krakow Working globally EN · UK · PL

Experience

Software Engineer

Softcery

Working across different projects in marketing, travel, and fintech with a backend-first focus. I handled analytics and platform integrations, helped stabilize checkout and fraud-related flows in a legacy fintech product, and improved delivery reliability as priorities shifted. I also supported cleanup and workflow improvements in older codebases.

Software Engineer

B2B Grocery Ordering Platform

Built a B2B ordering platform for a German grocery supplier end to end as the only engineer: landing page, ordering flow, backend architecture, and invoicing automation through Fakturownia.pl. The MVP shipped in roughly two weeks, and I later added accounting automation that removed a lot of repeat manual work for the team.

Backend Developer

BYFL.team

Led the NestJS backend in a startup environment, shaping API design, reviewing code, and improving release quality. Worked closely with frontend, iOS, and Android engineers over a long engagement to keep cross-platform releases aligned while contracts and integrations kept changing.

Software Engineer

CML Team

Delivered CRM product work in Next.js with clear improvements in page load time, build speed, and long-standing UI bugs that had been difficult to close. In parallel, I contributed to a fintech/blockchain track focused on KYC flows and smart-contract work with NestJS, and built lightweight scrapers for high-volume data collection.

Fullstack Developer Intern

Binary Studio Academy

Shipped the SmartSpend expense-tracking fintech project across both frontend and backend. Took on code review responsibility for other interns and worked directly with program stakeholders to turn feedback into concrete product updates.

Open to strong product teams.

I'm a software engineer focused on backend-heavy full-stack work. I'm open to new opportunities and glad to connect about how I can contribute.

Email me