Eugene

📍 Mühlenstraße 137, 28799
YEVHEN TYMCHENKO Bremen, DE
Senior Full-Stack Engineer 📞 [відкрити контакти](див. вище в блоці «контактна інформація»)
Node.js / TypeScript / PHP / Laravel / AWS / Kubernetes (CKA) ✉ [відкрити контакти](див. вище в блоці «контактна інформація»)
🔗 [відкрити контакти](див. вище в блоці «контактна інформація»)
tymchenko-928063195

PROFESSIONAL SUMMARY

Senior Full-Stack Engineer with 8+ years delivering scalable microservice systems across FinTech, Web3, E-commerce,
HealthTech, and SaaS domains. Expert in Node.js/NestJS/Fastify and PHP/Laravel, with deep experience in event-driven
architectures (Kafka, RabbitMQ), real-time APIs (WebSocket), and cloud infrastructure (AWS, Kubernetes). Certified
Kubernetes Administrator (CKA, Oct 2024). Based in Bremen, Germany — immediately available, full-time.
TECHNICAL SKILLS

Backend (Expert): Node.js · NestJS · Fastify · ExpressJS · PHP · Laravel · Symfony · TypeScript · REST API · GraphQL
Cloud & Infra (Expert): AWS (Lambda, S3, SQS, SNS, DynamoDB) · Kubernetes (CKA) · Docker · Argo CD · GitHub Actions ·
GitLab CI · CircleCI · Grafana · Terraform
Databases (Expert): PostgreSQL · MySQL · Redis · MongoDB · Elasticsearch · ClickHouse · Vertica · Firebase · TypeORM ·
Sequelize · Eloquent
Messaging (Expert): Kafka · KafkaJS · RabbitMQ · WebSocket · Socket.io
Frontend (Proficient): ReactJS · Next.js · Vue.js · Redux Toolkit · Recoil · Vuex · React Native · TypeScript
AI / Data (Familiar): LangChain · LangGraph · Qdrant · Hugging Face · Claude Code · Cursor AI · n8n
Practices: TDD · DDD · SOLID · Hexagonal Architecture · Microservices · Monorepo · Scrum · Code Review
PROFESSIONAL EXPERIENCE

Senior Full-Stack Engineer · Upland · USA (Remote)
Apr 2024 – Jan 2026 · Full-time · Blockchain / Web3 / Gaming / DeFi · Team 73+
▸ Reduced 3D asset delivery latency by ~40 % by building a GLTF texture optimizer (Node.js, KTX2/ETC1S compression via
toktx, AWS S3) — automated daily via Kubernetes CronJob, eliminating 100 % of manual processing.
▸ Eliminated a geographic purchase-restriction bug affecting ~15 % of secondary-market transactions by redesigning
ownership-verification logic in NestJS/TypeScript and exposing it over HTTP (RxJS); zero regressions post-deploy.
▸ Reduced Adjoe whitelist processing time by 60 % by replacing a sequential job with async batch processing (batch=1
000, KafkaJS, FeathersJS, Sequelize/PostgreSQL), enabling real-time non-payer onboarding at scale.
Stack: Node.js · NestJS · Fastify · TypeScript · Laravel · PostgreSQL · Redis · Kafka · RabbitMQ · WebSocket · Socket.io · AWS · Kubernetes ·
Docker · Argo CD · Grafana · Elasticsearch · FeathersJS · WASM
Senior Full-Stack Engineer · ProCoders · Ukraine (Remote)
Apr 2021 – Apr 2024 · Full-time · E-commerce / SaaS / Education · Team 200+
▸ Increased checkout conversion by integrating Stripe custom hooks and subscription flows into a React/Next.js
microfrontend — used by 50 000+ monthly active users on quartznetwork.com.
▸ Cut API response time by 35 % by optimising PostgreSQL queries (indexes, stored functions) and introducing Redis
caching layers across three NestJS microservices.
▸ Accelerated cross-team delivery by building a reusable UI component library (React/TypeScript, Playwright-tested)
shared across 4 product squads, reducing per-feature UI effort by ~25 %.
▸ Improved monitoring coverage from 60 % to 95 % by redesigning the activity-log system and feature-flag module across
the full frontend stack.
Stack: Node.js · NestJS · Fastify · Laravel · ReactJS · Next.js · React Native · TypeScript · PostgreSQL · MongoDB · Redis · RabbitMQ ·
WebSocket · Stripe · AWS · Kubernetes · Docker · Grafana · Playwright
Senior Full-Stack Engineer · Independent Contractor · Remote
Mar 2020 – Apr 2024 (parallel / sequential engagements) · Contract · FinTech · HealthTech · E-commerce · Payments
▸ Praxis Tech — built payment orchestration microservices (Node.js, NestJS, PostgreSQL) processing multi-currency
transactions; integrated PSP failover logic reducing payment failures by ~30 %.
▸ MDI Health / PHY Health — developed HIPAA-aligned HealthTech APIs (NestJS, Fastify, PostgreSQL, KeyCloak SSO) for
medication management and patient data pipelines; implemented end-to-end TDD with Jest.
▸ 1-Commerce — led full-stack development of a monolithic SaaS e-commerce platform (Laravel, Vue.js, MySQL, Stripe)
from 0 to production; introduced DDD layering that cut feature-delivery time by 20 %.
▸ Konecranes / Aufinity / Primis Tech — delivered backend integrations and real-time dashboards (Node.js, WebSocket,
ClickHouse, Vertica, React) for industrial IoT and analytics platforms.

Stack: Node.js · NestJS · Fastify · PHP · Laravel · Symfony · TypeScript · PostgreSQL · MySQL · MongoDB · Redis · React · Next.js · AWS ·
Docker · GitLab CI · GitHub Actions · CircleCI · Stripe · KeyCloak
Team Lead Frontend / Full-Stack Engineer · Alvarium Soft · Kharkiv, Ukraine
Mar 2020 – Apr 2021 · Full-time · E-commerce from scratch
▸ Led a team of 2 developers delivering nisuno.com from 0 to production in 8 months; integrated Solid Gate payments
and FCM push notifications.
▸ Architected real-time chat and custom CMS for product & inventory management, reducing manual admin work by ~3
h/day.
Stack: Vue.js · Python (Django) · PostgreSQL · Redis · Docker · Vuex · GCP · WebSocket
Full-Stack Engineer · Intent Solution · Kharkiv, Ukraine
Mar 2019 – Mar 2020 · Full-time · LMS from scratch · Team 17
▸ Co-built newskillsacademy.co.uk LMS from scratch (14 devs); owned DB design (triggers, stored procs), CRON jobs, real-
time notifications, and payment integration.
Stack: Laravel · Vue.js · MySQL · Redis · WebSocket · Docker · Laravel Horizon
Backend Developer · IT-Serve · Kharkiv, Ukraine
Sep 2018 – Mar 2019 · Full-time
▸ Built PWA and SPA products from scratch; designed REST APIs and DB architecture; refactored legacy codebase reducing
technical debt by ~40 %.
Stack: Laravel · Vue.js · MySQL · Firebase · Docker
EDUCATION

Master's Degree in Radiophysics · Kharkiv National University (V. N. Karazin) · 2009 – 2014
CERTIFICATIONS

▸ Certified Kubernetes Administrator (CKA) — Cloud Native Computing Foundation (CNCF) · Oct 2024 · ID: LF-wq4o65c956
▸ NestJS Architecture & Advanced Patterns — NestJS Official (courses.nestjs.com) · Feb 2024 · ID: cert_9vn9nprs
▸ Vue.js Developer Level I — Vue School / certificates.dev · Feb 2024 · ID: CVD-000419
Certificate scans on the following pages.
LANGUAGES

Ukrainian (Native) · Russian (Native) · English (C1 — Professional) · German (A2 — actively improving)

CERTIFICATIONS — SUPPORTING DOCUMENTS
1. Certified Kubernetes Administrator (CKA) — CNCF, October 2024

2. NestJS Architecture & Advanced Patterns — courses.nestjs.com, February 2024

3. Vue.js Developer Level I — Vue School / certificates.dev, February 2024