Job
In this role, you will design core APIs and backend services for the mobile app, oversee production systems, integrate third-party APIs, and mentor junior colleagues in a collaborative environment.
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Job technologies
Your role in the team
- Design, build, and maintain our core APIs and backend services that power the mobile app and marketplace.
- Own the operations and monitoring of production systems.
- Be the mobile-aware voice in backend decisions across squads: review designs and API changes, yours and other teams', to make sure they fit the needs and constraints of our mobile app, and flag caveats early.
- Integrate third-party systems and APIs into our platform.
- Own design and implementation of new features and services.
- Identify best practices and create or recommend standards for use across the entire engineering department.
- Documents and demonstrates solutions by developing documentation, flowcharts, layouts, diagrams, charts, code comments, and clear code.
- Contribute to sustaining refurbed engineering culture by mentoring more junior colleagues and onboarding new joiners.
- Collaborate closely with other engineers, product managers, and business stakeholders to deliver high-quality solutions.
- Proactively offers insights and presents achievements and results in relevant meetings.
- Occasionally propagate your backend changes to the frontend.
Our expectations of you
Education
- A degree in Computer Science (or a related field) or equivalent work experience is desired as it provides a strong foundation for tackling the complex challenges we work on.
Qualifications
- You have strong proficiency in Go and a deep understanding of distributed systems and service-oriented architecture.
- You are comfortable with JavaScript/TypeScript, or confident you can pick up Node.js quickly—with strong Go fundamentals, we expect the rest to come easily.
- You've worked on a team that builds and maintains a native mobile app.
- You don't need to write native code yourself, but you have hands-on experience with how mobile apps consume backend services and understand the constraints and considerations they introduce (API design for mobile, versioning and backward compatibility, release cycles, latency, offline behavior).
- You can spot when a backend decision won't fit the app and flag it early.
- You are well-versed in SQL and relational database design.
- You have general knowledge of the frontend world and are able to perform basic tasks in our frontend apps.
- You're a self-starter with strong ownership, initiative, and the ability to quickly learn and navigate complex systems.
- You're open-minded and communicate with clarity, directness, and respect.
- You value humility, have a low ego, and thrive in a collaborative, transparent culture.
- You have excellent English skills and are based in a European time zone.
- Du bist neugierig und experimentierfreudig und probierst gerne neue und bessere Wege der Softwareentwicklung aus – sei es ein neues Framework, das neueste KI-Tool oder die Entwicklung einer neuen Vorgehensweise.
- Bonus: you're comfortable operating beyond your own squad—reviewing designs and guiding other engineers whose work touches the mobile app.
- This role has room to grow into a broader technical leadership scope for the right person.
Experience
- You have 7+ years of experience designing and building scalable backend services in a modern production environment.
- Existing Node.js experience is a plus.
What we offer
- This role is open to Europe-based candidates only with a valid right to work.
Benefits
Work-Life-Integration
Topics you will work on
Job locations
About your employer
Wien
Our online platform for refurbished phones, tablets and laptops comes with a minimum 1-year warranty. All refurbed devices look like new and function just as well. They're up to 40% cheaper and 100% more sustainable.
- English
- Startup
- Full Remote, Hybrid, Onsite
- Trade
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