Go/Java Backend Engineer (Russian speaking)

Remote Full-time position

Company Description

STB Union is the ultimate financial app for everyday money management needs. It offers a multicurrency account and STB Visa card, worldwide money transfer app, 24/7 currency exchange, and more. With STB Union, you can effortlessly manage your finances and transactions.

Role Description

This is a full-time Backend Engineer role at STB Union, offering flexible remote work arrangements. Candidates must have overlapping working hours with time zone GMT+3 for at least 6 hours daily.

The work splits roughly 50/50 between two streams: maintaining and extending our existing system - a large Java monolith with microservices around it. Building a new platform from scratch on Go, Vue and PostgreSQL, AI-first with Claude Code. You would become the team's Go reference point while the team onboards you on Java and on a complex financial domain.

Required Qualifications

• 5

• years of backend engineering, including 3+ years of production Go

Genuine willingness to work in Java - roughly half the work is Java on a legacy codebase

Experience developing new features and architecting a codebase

AWS (ECS/SQS/RDS), PostgreSQL, Git (GitLab/GitHub), Docker

Daily use of AI coding tools, with full ownership and review of everything that ships

Prior experience working remotely in a distributed team

Fluent in Russian (C1) and English (B2) - both verbal and written

Experience in fintech or banking sectors

Preferred Qualifications

Experience with Java and Spring Boot (or Vert.x)

Experience with Vue 3 — the frontend of the new platform

Experience with Kubernetes, NATS or Kafka

Experience with more than one programming language

Core Responsibilities

Leading end-to-end feature delivery together with Product/QA/DevOps teams — you own the feature through design, implementation, tests, review and production

Building Go services for the new platform, plus Java features and integrations on the existing one

Designing scalable solutions for complex business problems and contributing to technical architecture decisions

Writing maintainable well-tested code with Claude Code

Participating in manual and AI code reviews and providing constructive feedback

Monitoring and maintaining production systems

Implementing best practices for security and performance

Tech Stack:

Go/Java/SpringBoot/Vert.x, AWS (ECS, SQS/SNS, S3, ElastiCache), PostgreSQL, Terraform, GitLab, Docker, K8s, Grafana, Angular/

Vue 3

, React Native. 

Language Requirement Note:

This position requires fluency in Russian and English due to team composition and business requirements.