Staff Backend Software Engineer - Remote (Poland)

Lever, Inc.; Polska; Hybrid; PLN 279,000 - 446,000; Full time

Benefits offered by this job

Monthly salary and annual bonus

Training and Udemy courses

Private medical care

Remote work 100%

Office options in Poznán/Warsaw

Job summary

OLX is seeking an AI-native Staff Backend Engineer to scale our platforms from Poland and beyond. You will architect AI agent context pipelines, define task specifications, guide code reviews, and drive migration from a legacy monolith to microservices, ensuring reliable, testable outcomes.

Fluent in Golang, Java/Kotlin and PHP, with deep distributed-systems experience, you will collaborate with product and leadership, mentor engineers, and design robust REST/GraphQL contracts.

Qualifications

• Strong ownership and accountability in engineering lead roles.
• Experience shaping AI-assisted architectures and large-scale systems.
• Proficiency with Golang/Java/Kotlin and PHP for backend services.
• Deep knowledge of distributed systems, CI/CD, and cloud platforms (AWS).
• Ability to communicate clearly with engineering, product, and leadership.

Responsibilities

• Architect context pipelines for AI agents and define acceptance criteria for tasks.
• Design and maintain agent-ready systems with test suites and CI/CD pipelines.
• Mentor engineers, lead by example, and influence tech direction across teams.
• Guide migration from monolith to microservices with bounded contexts.
• Define API contracts (REST/GraphQL) and database schemas.

Skills

Agentic workflows

Context engineering

Multi-agent orchestration

Coding fundamentals

Golang

Java/Kotlin

PHP

Distributed systems

CI/CD

RESTful APIs

GraphQL APIs

AWS

Databases

English communication

Mentorship

Architectural design

Tools

Claude Code

Cursor Agent

Haiku

Sonnet

Opus

GraphQL

Job description

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 an AI-native Staff Backend Engineer!

Join one of our cross-functional teams in Motors, Real Estate, OLX Classifieds, or Platforms, working remotely from Poland.

Are you someone who is craving scalable problems and dealing with optimizations?

You'll work with a creative, critical, and well-organized team from the comfort of your house, but as close as we have ever been!

You will play a key role in enabling our organisation to scale efficiently.

Who we are looking for:

• You can use agentic workflows (Claude Code, Cursor Agent, or equivalent) as your default, not as a novelty.

• 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.

• You understand model routing trade-offs (e.g., when to use Haiku vs. Sonnet vs. Opus) and multi-agent orchestration.

• Strong ownership instinct: AI output is a first draft, not a deliverable; you validate, refactor, and take full accountability.

• You have strong Coding and Computer Science Fundamentals. Roughly ⅔ of your time will be hands‑on technical work: designing solutions, steering and reviewing AI‑generated code, developing new ideas, and reviewing others' contributions. The rest goes to cross‑team influence, mentoring, and strategic alignment.

• Strong background experience in Golang, Java/Kotlin (preferred technologies), and able to work with PHP. Flexible and capable of adjusting to changing project requirements, roles, and backend technologies as needed.

• Scalable Systems Expertise. Experience with large‑scale web applications, an economic‑thinking mindset, and being able to design well‑bounded future‑proof domain systems, aligned with the business objectives.

• Deep expertise in scalable distributed systems, CI/CD, RESTful and GraphQL APIs, AWS, and relational + NoSQL databases.

• Big‑picture thinker: aligns technical decisions with business strategy, influences without authority.

• Clear communicator in English across engineering, product, and leadership audiences.

• Self‑starter who identifies what needs doing and takes initiative without waiting to be asked.

• Skilled Technical Leader and Mentor: Guide and support engineers by setting a strong example. As a Staff Engineer, you are a role model, leading by example and through your expertise.

What you will be doing:

• Architect context pipelines for AI agents: curate what enters the context window (repo boundaries, domain knowledge, test outputs, CI feedback) so agents produce reliable, mergeable code, not just plausible code.

• Prepare task specifications that are agent‑actionable (clear acceptance criteria, referenced modules, explicit constraints)

• Design and maintain agent‑ready systems: well‑bounded repos, comprehensive test suites as guardrails, CI/CD pipelines with structured output agents can parse and act on.

• Serve as an AI Champion: join and strengthen our growing AI Champion community, contribute to workshops, curate effective agentic workflows, and mentor engineers on AI‑assisted practices. Contribute to org‑level AI tooling evaluations and OLX AI practices repositories.

• Drive active migration from a legacy monolith to microservices, owning decisions on bounded domain decomposition. Working on making agentic workflows effective across a codebase whose boundaries are actively being redefined.

• Set the bar for GraphQL API design, RESTful contracts, database schema, and CI/CD quality across the tribe.

• Work with product and engineering leadership to identify high‑value problems, propose initiatives, and drive impactful technical direction without direct authority

• Guide senior engineers in managing and reducing technical debt with AI as an accelerator, not a shortcut.

Our Hiring Process:

• Recruiter Screen
• Management Capabilities
• System Design
• Live Coding

Our Benefits

• Monthly salary and an annual bonus (20%)
• Training and conference budget, and free access to Udemy courses
• A benefits package with 500 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!