Senior Software Engineer (m/f/d)
Credibur · Berlin
What this role requires
3 requirements, read out of the advert rather than guessed from the job title:
Also mentioned, not required: Git, AWS ECS, English (B2). Worth having, but their absence is not what gets a CV filtered out.
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Job description
At Credibur , we are building a debt management platform for non-bank lenders that must work reliably under real operational pressure. As our customer base and data volume grow, the hard problems are no longer features, but correctness, performance, and robustness.
We are looking for an experienced backend-focused Software Engineer (m/f/d) who helps us stabilize and scale our core systems without unnecessary complexity.
This role is about building practical, reliable solutions to real-world problems.
Our hiring process includes a live coding session without AI assistance .
Tasks
Own backend robustness: Improve and maintain core backend components with a focus on correctness, performance, and long-term maintainability
Read the full description (37 more sections)Show less
Solve complex business logic: Identify and fix edge cases caused by heterogeneous customer data and evolving requirements
Improve database performance: Analyze and optimize slow queries, data access patterns, and schema decisions as data volume increases
Build pragmatic solutions: Extend existing systems carefully, choosing simplicity over premature optimization & abstraction
Collaborate on operations where it matters: Contribute to infrastructure, CI/CD, observability, and deployment improvements that directly impact backend stability and scalability
Work closely with the team: Collaborate with other engineers and product to turn real operational needs into reliable backend behavior
Requirements
Proven experience as a Senior Software Engineer
2+ years of experience with Python in production systems
2+ years of experience with Django
Strong problem-solving skills
Hands-on experience with PostgreSQL, including data modeling and query optimization
Experience designing and implementing RESTful APIs
Proficient with Git and collaborative workflows (feature branches, pull requests, code reviews)
Experience writing automated tests to ensure reliability and prevent regressions
Ability to make pragmatic technical decisions, avoiding overengineering while maintaining high standards
Experience working with AWS ECS and containerized deployments in production environments
Clear, collaborative communication in English
Nice to have: Prior exposure to financial or data-heavy systems
Core hours: 10:00 to 16:00 CET
What We Offer
🚀 Early-stage fintech startup
Work close to the product, the problems, and the decisions that shape the company
📈 High-impact, visible work
Your work directly affects platform stability, scalability, and how we grow
💬 Feedback as dialogue, not one-way input
We use retrospectives and reviews to openly discuss what worked, what caused friction, and how to improve collaboration and handovers together
🌱 Real focus on development
Regular development talks, documented progress, and concrete next steps to support your growth
🌍 Flexible work setup
Remote within Europe, with clear expectations around collaboration
✍️ Flexible contract model
Freelance option available for candidates outside Germany. No agencies
💰 Competitive compensation
Based on experience, responsibility, and impact
At Credibur, we believe that diverse teams build better products . We welcome applications from people of all backgrounds, regardless of gender, age, ethnicity, disability, sexual orientation, or religion . If you’re passionate about what we do but don’t meet 100% of the criteria, we still encourage you to apply - we value potential and ambition.
All hires complete on-site onboarding in Berlin. Background checks are required as part of our standard compliance process.
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