VS.
Prague, Czechia

Senior Full Stack
Engineer.

I design and build scalable web products — from frontend and backend to infrastructure, architecture, and long-term maintainability.

View experience Download CV LinkedIn ↗ Email ↗

vitaliy.skripka23@gmail.com · linkedin.com/in/vitalii-skripka

7+ years of commercial engineering experience
20K daily visitors on a platform built from scratch
100K+ daily users on high-load game backend systems
Full-stack frontend, backend, data, cloud and infrastructure
01 / Selected experience

Products, platforms
and systems at scale.

01

Sigma Software

Fintech B2B Platform

Fintech platform serving European business needs, with large-scale software components built primarily with React and Node.js.

ReactNode.jsArchitectureMentoring
Responsibilities +
  • Design and implement large-scale software solutions and components across multiple technologies.
  • Follow engineering best practices and company and client guidelines.
  • Provide supervisory, advisory, and coaching support for less-experienced engineers.
  • Promote clean code, design patterns, and sound software engineering principles.
02

Finloo

Affiliate Marketing Platform

Designed and built the entire platform from scratch — frontend, backend and infrastructure — handling up to 20,000 visitors per day. Profiled and optimized the NestJS backend and MySQL schema, which cut sustained server CPU load by roughly 4×. Also built the retention system sending 400,000 emails per month and the anti-bot layer that has blocked 200,000 bot sessions.

60–90% → 15–20% sustained CPU load after backend and MySQL optimization
~4× headroom reclaimed on the same infrastructure, no scale-up needed
400K / month emails delivered by the retention system I built
200K bot sessions detected and blocked
NestJSReactViteDockerMySQLPerformanceAnti-bot
Responsibilities +
  • Designed and built the entire system from scratch.
  • Owned and maintained frontend, backend, and infrastructure.
  • Traced slow endpoints to unindexed and N+1 query patterns using slow-query logs and monitoring dashboards.
  • Added targeted composite indexes and reworked the heaviest queries, dropping sustained CPU utilization from a 60–90% band to a steady 15–20% immediately after deploy.
  • Left only short scheduled-job spikes on the CPU graph, removing the risk of saturation during peak traffic.
  • Designed and built the retention system from scratch, delivering around 400,000 emails per month.
  • Built bot detection and filtering that has blocked over 200,000 bot sessions, keeping traffic data and affiliate payouts clean.
  • Discussed, designed, and implemented new product features.
  • Tracked, investigated, and fixed production issues.
03

Techery

SaaS & E-commerce Platforms

SaaS and e-commerce systems spanning iOS monitoring, MLM functionality, multiple storefronts, admin panels, and complex authorization flows.

Next.jsNode.jsJavaReactAngularAuth0
Selected work +
  • Built multiple Next.js websites from scratch with headless CMS integration.
  • Developed backend services and shared packages using Java and Node.js.
  • Refactored legacy Angular/React and Node.js/Java systems across a large e-commerce platform.
  • Contributed to Auth0 migration and customer migration between sales platforms.
  • Participated in an AI product-recommendation chatbot hackathon.
04

Moonactive

High-load Game Backend

Backend systems for an iOS and Android game serving more than 100,000 daily users, with strong API performance requirements.

Node.jsRedisAWSKubernetes
Responsibilities +
  • Implemented backend business logic in a high-load Node.js, Redis, and AWS environment.
  • Developed internal packages and reusable engineering tools.
05

EPAM

E-commerce & Analytics Systems

E-commerce SaaS connecting stylists and clients, plus ETL and analytics systems for insurance customer data.

ReactReduxNode.jsGraphQLGCPSQL
Selected work +
  • Built customer-facing and admin e-commerce frontends from scratch with React and Redux.
  • Developed Node.js microservices using MySQL, PostgreSQL, and GCP.
  • Built an analytics and administration system with React, GraphQL, Node.js, and Elasticsearch.
02 / How I work

Engineering beyond
the feature ticket.

01

Zero to production

I’m comfortable owning architecture, implementation, deployment, maintenance, and iteration — not just one layer.

02

Full-stack by default

I move across React frontends, Node.js services, databases, cloud infrastructure, and integration boundaries.

03

Scale with purpose

I’ve worked on systems serving tens of thousands of visitors and 100K+ daily users, where performance actually matters.

04

Keep systems clean

I care about maintainability, refactoring, sensible abstractions, design patterns, and helping teammates grow.

03 / Engineering stack

Tools I use to
ship products.

Frontend

  • React
  • Next.js
  • Angular
  • Redux
  • Vite

Backend

  • Node.js
  • NestJS
  • Java
  • GraphQL

Data

  • MySQL
  • PostgreSQL
  • Redis
  • Elasticsearch

Infrastructure

  • AWS
  • GCP
  • Docker
  • Kubernetes
04 / Timeline

A career built across
product stages.

Sigma SoftwareFintech B2B Platform
FinlooAffiliate Marketing Platform
TecherySaaS & E-commerce
MoonactiveHigh-load Backend
EPAME-commerce & Analytics

Senior Software Developer · Full Stack Engineering

Build it clean.
Make it scale.

Prague, Czechia vitaliy.skripka23@gmail.com linkedin.com/in/vitalii-skripka ↗ Download CV ↗