Senior Backend Developer (PHP+Node.js)

Ucrânia

The CHI Software team is not standing still. We love our job and give it one hundred percent of us! Every new project is a challenge that we face successfully. The only thing that can stop us is… Wait, it’s nothing! The number of projects is growing, and with them, our team too. And now we need a Senior PHP+Node.js Developer.

About the Role

Location: Remote / Hybrid (EU or UA time zone)

Schedule: Full-time

Experience: 5+ years

Engagement: Long-term

Project Overview

You’ll be working on a standalone gateway service responsible for handling analytical events from the platform. This service will:

Receive, validate, and forward events to 3rd party tools
Integrate with systems like Amplitude, Segment, AWS SNS/SQS
It will be built using event sourcing and CQRS principles
Handle advanced database scenarios like optimistic/pessimistic locks, transactional integrity (ACID), and more
Include the development of internal frameworks and libraries to be reused across other teams
You’ll collaborate with architects and engineers to shape this infrastructure-critical component from the ground up.

Requirements

5+ years of professional experience as a Backend or Full-Stack Developer
3+ years of experience with Node.js (Express.js / NestJS / Fastify)
3+ years of experience with PHP (Laravel / Symfony)
Experience with DDD
Deep understanding of REST APIs, Microservice Architecture, and Asynchronous Patterns
Strong experience with SQL (PostgreSQL / MySQL) and NoSQL (MongoDB / Redis)
Experience with Docker, Docker Compose, CI/CD pipelines
Familiarity with TypeScript, unit testing (Jest / Mocha)
Skilled in API documentation tools like Swagger or Postman
Upper-Intermediate or higher level of English (daily international team communication)

Responsibilities

Design and develop new backend features and services in Node.js and PHP
Build asynchronous microservices using event sourcing and CQRS
Architect scalable API gateways and data validation pipelines
Integrate with 3rd party platforms like Amplitude, Segment, SNS/SQS
Develop reusable internal libraries and SDKs for internal teams
Ensure code quality with strong unit/integration testing and documentation
Participate in team rituals: code reviews, sprint planning, retrospectives
Collaborate with DevOps and QA to maintain high standards of reliability and performance