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Vasyl Chyypesh

@vasylchyypesh

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Senior Backend Engineer with 14+ years of software engineering experience, specialising in Node.js, TypeScript and AWS.

Ukraine

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What I'm looking for

Long-term remote Senior Backend Engineer opportunities.

At Codify, I built AWS Marketplace and App Store integrations for Stigg.io, including subscription management for one of its largest customers, with 3.5 million users. I also maintained and extended Stripe and Zuora billing connectors across the subscription lifecycle.

At Visible Magic, I contributed to breaking Zelus Wallet’s backend into 11 independently deployable microservices, personally designing five. I also designed an EVM transaction service and built cryptocurrency data and balance services, plus a secure offline blockchain transaction signing system.

I built an AWS Lambda application for parallel NFT minting that sustained peak traffic of approximately 5,000 requests per minute, and created a microservice template that reduced new-service setup from approximately eight hours to one. I also built an LLM-as-a-Judge evaluation pipeline for a web3 RAG chat system using OpenAI API and Langfuse.

Earlier, I built data aggregation, document-processing, and product backends at Erbis, SharpMinds, Azinec, and ThinkMobiles. My work has included third-party integrations, production support, observability, and service delivery across SaaS, FinTech, and web3 products.

Experience

Work history, roles, and key accomplishments

Senior Backend Engineer

Codify

May 2025 - May 2026 (1 year)

Built AWS Marketplace and App Store integrations for Stigg.io, including subscription management for a customer with 3.5 million users. Maintained Stripe and Zuora billing connectors and participated in on-call support for systems handling 10,000-15,000 mutation requests per second.

NodeJS NestJS TypeScript PostgreSQL Redis AWS SNS SQS GraphQL Docker Jest

Senior Backend Engineer

Visible Magic

Sep 2022 - May 2025 (2 years 8 months)

Contributed to decomposing the backend into 11 microservices, designing five and documenting decisions in ADRs. Built an EVM transaction service, cryptocurrency data services, and a secure offline signing system in an Evervault Enclave.

NodeJS TypeScript ExpressJS Fastify MongoDB PostgreSQL Redis RabbitMQ AWS CDK Docker GitHub Actions EthersJS

Senior Backend Engineer

Erbis

Jan 2021 - Apr 2022 (1 year 3 months)

Built an aggregator combining data from three providers with a two-tier cache, reducing response times and upstream API costs. Implemented APIs for PDF and ZIP exports and integrated OpenTelemetry with AWS X-Ray.

NodeJS NestJS TypeScript MongoDB AWS Docker OpenTelemetry Jest

Backend Engineer

SharpMinds

Aug 2017 - Jan 2021 (3 years 5 months)

Developed document-processing and scheduling microservices, third-party integrations, and APIs for dashboard data aggregation. Created a service code generator that reduced setup time from 8-12 hours to 1-2 hours and mentored junior engineers.

NodeJS ExpressJS KoaJS MSSQL PostgreSQL Azure AWS Docker GitHub Actions

Backend Developer

Azinec

Aug 2016 - Aug 2017 (1 year)

Built APIs and admin features for Livescore and PlayTheSix DFS, integrating sports data providers, authentication, content delivery, and Twitter and Slack bots.

NodeJS ExpressJS LoopBack MongoDB AWS

Backend Developer

ThinkMobiles

Sep 2011 - Aug 2016 (4 years 11 months)

Developed APIs and services for delivery, government services, and retail loyalty products, including route optimization, Microsoft Dynamics CRM integration, and Bluetooth beacon features. Managed releases and mentored junior engineers.

C#.NET Microsoft Dynamics CRM Bluetooth API Development