AI-native Senior Backend Software Engineer - Remote (Poland)

WELCOME TO OLX We're building marketplace sustainable ecosystems that millions of people depend on every month – to buy and sell cars, find homes, land jobs, and trade secondhand goods. It's commerce that matters: safe, smart, and environmentally responsible. We do this with courage to innovate, commitment to outcomes, collaboration across 50+ nationalities and 7 markets, and a customer-led approach that puts real people first. Add a desire to win – and you get a culture that's ambitious, fast-moving, and built on trust. Our brands – including AutoTrader, OLX, Otomoto, Property24, and more – are loved by millions. And we're backed by Prosus, one of the world's largest tech investors. Join OLX and see how far you can go. 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) Diversity, Equity and Inclusion at OLX OLX values diversity and welcomes applicants of all races, ethnicities, disabilities, ages, genders, sexual orientations, religions, backgrounds, and experiences to apply. If this role excites you, we encourage you to apply, even if you don’t meet all the requirements - you may be just the right fit for this or other opportunities with us! OLX will process your personal data to assess your fit for the applied position. You may optionally consent to store your data for up to 12 months after the application process for consideration in future OLX roles. For more details on how your application data will be processed please check our Privacy Statement . Grupa OLX sp. z o.o. has implemented an internal procedure for reporting violations of the law. You have the right to report a violation of the law via website or by phone using any of the phone numbers listed on this site. The verification of reports and the undertaking of follow-up actions are handled by authorized members of the ethics and compliance team. All reports will be treated with the utmost care, confidentiality and in accordance with applicable law.