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Yevhen Kotyk

@yevhenkotyk

Message

Software engineer building production systems end-to-end — secure backends, fast UIs, and reliable data pipelines.

Ukraine

Message

What I'm looking for

I seek backend/full‑stack roles where I can build secure multi‑tenant systems, improve performance, and ship observable, testable production services in collaborative teams.

Software engineer with ~2.5 years of experience building production systems end-to-end from secure multi-tenant backends to performant server-rendered UIs and data pipelines.

Stack

Frontend: React, Next.js (RSC, Server Actions), Svelte, Tailwind

Backend: NestJS, Fastify, Express, Node.js, Laravel

Data: PostgreSQL, Redis, TypeORM, Drizzle, ETL pipelines

Infra: Docker, GitHub Actions, AWS(ec2, s3, rds), GCP, DigitalOcean

Selected work

• Multi-tenant banking CRM with row-level security, RBAC, analytics dashboards, and PDF/CSV exports

• ETL pipeline processing ~3M Steam app records/day using Redis merge and transactional upserts

• Collaborative workspace with AI features built end-to-end (schema → API → frontend → deployment)

• Real-time chat systems, Stripe payment flows, containerized deployments with Zero-Trust networking

Focused on system design, reliability, and CI/CD automation.

B.Sc. in Computer Science.

Open to remote opportunities.

Contact: yevhenkotyk.work@gmail.com

Experience

Work history, roles, and key accomplishments

Current

Software Engineer

Current

Mirko Solutions

Aug 2025 - Present (10 months)

Built a multi-tenant SaaS with RLS and strict RBAC, implemented analytics (pre-aggregations, materialized views) and exports, and added server-rendered dashboards; delivered e2e tests and CI/CD pipelines yielding secure tenant isolation and measurable query speed-ups.

RLS OLS RBAC PostgreSQL Materialized Views CI CD End To End Testing API Design

Full Stack Developer

Octo Games Studio

Mar 2025 - Aug 2025 (5 months)

Designed an ETL pipeline processing ~3M Steam app records/day with transactional upserts and history tables, added wishlist/follower analytics and server-rendered tables, and tuned indexes for double-digit performance gains while implementing batching, retries, and observability.

ETL Data Pipelines Redis PostgreSQL Index Tuning Server Side Rendering Batching Retry Logic Observability

Software Engineer

Insiders

Sep 2024 - Mar 2025 (6 months)

Contributed across multiple B2B and consumer projects: raised test coverage and stabilized CI for a B2B product, implemented real-time chat and dynamic forms in a charity app, and integrated Stripe subscriptions and migrations for a mobile app.

Testing Next.js NestJS Socket.IO Stripe Debugging

Full Stack Developer

Luna Edge

May 2024 - Sep 2024 (4 months)

Shipped large sets of UI components and MVP endpoints for a public services super-app and implemented containerized hosting with zero-trust access policies under an NDA.

UI Components API Development Containerization Deployment Frontend Engineering Observability