Join Our Team as a AI-native Senior Backend Engineer!
Join one of our cross-functional teams in Motors, Real Estate, OLX Classifieds, or Platforms, working remotely from Poland.
As part of our 1,000+ tech team across multiple locations, you’ll collaborate with engineers, SREs, and product teams to build scalable, high-impact solutions, while reporting to an Engineering Manager who will support your growth and impact.
We use Golang and Kotlin, modernizing systems as we transition from legacy PHP and move towards a microservices architecture, deploying through GitLab CI/CD to AWS.
If you’re passionate about solving technical challenges and scaling cloud systems, we’d love to hear from you!
Who we are looking for:
You use agentic workflows (Claude Code, Cursor Agent, or equivalent) as your default, not as a novelty — you understand model routing trade-offs (e.g., when to use Haiku vs. Sonnet vs. Opus) and multi-agent orchestration.
You practice context engineering, not just prompt engineering — you design the full information architecture an AI agent needs to succeed: repo structure, CLAUDE.md / AGENTS.md configs, relevant code context, memory, and tool access.
Have strong CS fundamentals and hands-on technical depth in Golang, Java (Kotlin) (preferred technologies), able to work with PHP — you spend the majority of your time designing solutions, steering and reviewing AI-generated code, and contributing to a large-scale codebase.
You have scalable systems expertise: experience with large-scale web applications, well-bounded domain design, AWS cloud architecture, IaC (Terraform, CloudFormation), and solid database fluency (MySQL, DynamoDB, Redis, Memcached).
You are a product-minded engineer: you challenge decisions with a cost/value lens, articulate how services should evolve to meet business goals, and communicate clearly in English across engineering and product audiences.
You live "you build it, you run it, you own it" — AI output is a first draft, not a deliverable. You validate, refactor, take full accountability, and proactively identify what needs to be done without waiting to be asked.
What you will be doing:
Apply context pipeline discipline within your team's codebase: scope context windows to repo boundaries, domain knowledge, test outputs, and CI feedback so agents consistently produce reliable, mergeable code on real team work items.
Write agent-actionable task specifications for your team's backlog (clear acceptance criteria, referenced modules, explicit constraints) and keep the codebase agent-ready: well-bounded repos, comprehensive test suites as guardrails, and CI/CD pipelines with structured output agents can parse and act on.
Lead delivery of complex initiatives: break them into incremental milestones, manage cross-team dependencies, navigate ambiguity, and make deliberate quality-vs-delivery trade-offs — ensuring timely delivery without sacrificing standards.
Mentor engineers and contribute to the AI Champion community: share effective agentic workflows, run workshops, and help the team adopt AI-assisted practices.
Uphold standards for GraphQL API design, RESTful contracts, database schema, and CI/CD quality; lead incident response for your team; and manage technical debt with AI as an accelerator, not a shortcut.
Our hiring process:
- Recruiter Interview
- People Manager Interview
- Live Coding
- System Design
Our benefits:
- Monthly salary and an annual bonus (15%)
- Training and conference budget, and free access to Udemy courses
- A benefits package with 300 points on the Mybenefit platform per month, private medical care provided by Luxmed, Ask Henry services, and much more
- IP rights’ costs - 80%
- 100% remote work (as well as the possibility of working from our offices in Poznan and Warsaw)
Skills Required
- Experience using agentic workflows (e.g., Claude Code, Cursor Agent) and model routing
- Context engineering: design information architecture, memory, tool access, repo configs for AI agents
- Hands-on Golang development
- Hands-on Kotlin or Java development (Kotlin preferred)
- Ability to work with PHP codebases
- Experience with large-scale web applications and well-bounded domain design
- AWS cloud architecture experience
- Infrastructure as Code: Terraform or CloudFormation
- Database fluency: MySQL, DynamoDB, Redis, Memcached
- CI/CD experience, specifically GitLab CI/CD
- API design standards: GraphQL and RESTful contracts
- Product-minded engineering and clear English communication
- Mentoring engineers and contributing to team AI practices
- Ownership mindset: build, run, and own services; validate and refactor AI-generated code
What We Do
At OLX, we build leading marketplace ecosystems enabled by tech, powered by trust, and loved by our customers. Together we're building a more sustainable world through trade. Serving tens of millions of people every month, we help people buy and sell cars, find housing, get jobs, buy and sell household goods, and much more. Our well-loved consumer brands (including OLX, Otomoto, Otodom, Property24, and more) offer safe, smart, and convenient trading platforms and services for our customers. OLX is powered by teams around the world, who are unified in their ambition to help people get more from the world’s limited resources. We are OLX.
