Role Description Be part of the team building high‑throughput, low‑latency financial systems where correctness, reliability, and observability are non‑negotiable. You’ll work on core services that process time-sensitive financial data and execute critical workflows under strict performance and risk constraints. - Design and build latency‑sensitive Rust services handling high‑frequency data and decisioning. - Implement robust, testable financial logic with strict correctness guarantees. - Build and maintain streaming pipelines (real‑time inputs, event processing, and feedback loops). - Optimize performance across CPU, memory, and network with profiling and benchmarking. - Collaborate on API design, data models, and system architecture. Qualifications - A university degree in a relevant field of study (e.g. computer science, engineering, sciences, ...) or a comparable qualification. - Extensive experience in our tech stack: Rust, Docker, AWS, Terraform. - Strong Rust proficiency (ownership, lifetimes, concurrency, async, error handling). - Excellent systems thinking: latency, throughput, backpressure, and failure modes. - Experience building high‑performance services in production. - Experience with low‑latency systems. - Strong analytical thinking, both in the technical and in the product domain. - Excellent communication skills that are clear, concise, and targeted towards your audience - engineering, product, or other stakeholders. - A passion for well architected, testable and documented code. - Experience using coding agents (e.g., Codex or similar AI-assisted development tools) is a plus. - Experience with domain-driven design and distributed architectures and/or microservices is a plus. - Background in financial services and exposure to compliance or audit requirements in financial systems is a strong plus. Benefits - Be part of one of the fastest-growing and most visible Fintech startups in Europe, creating innovative services that have a substantial impact on the lives of our customers. - Work with an international, diverse, inclusive, and ever-growing team that loves creating the best products for our clients. - Be productive with the latest hardware and tools. - Learn and grow by joining our in-house knowledge sharing or career development sessions and spending your individual Education Budget. - Learn and experience German culture first hand by joining our free German language classes. - International relocation support is provided if required. - Opportunity to work from abroad. - Benefit from an attractive compensation package and from the company pension scheme. - Monthly contribution of 50% for the ‘Deutschland Jobticket’. - Say goodbye to order commissions and say hello to your complimentary subscription of Scalable Capital's PRIME+ Broker. - Enjoy flexible and discounted sports activities with Urban Sports Club.

Role Description As a Senior Backend Engineer, you will be responsible for: - Building and shipping backend services that power our financial products — APIs, automation pipelines, and cloud infrastructure. - Owning features end-to-end: digging into the problem, designing the approach, shipping fast, and iterating based on real usage. - Contributing to technical direction — advocating for better patterns, tooling, and developer experience. - Partnering with product and engineering to define solutions, not just execute specs. - Writing clean, reliable code at a high pace — focusing on quality and speed. - Raising the bar for the team through code reviews, technical input, and leading by example. Qualifications - 5+ years shipping backend systems in production — APIs, services, cloud infrastructure. - Strong fundamentals in at least one of our core languages (TypeScript, Python, PHP). - Experience with cloud platforms (AWS and/or GCP), containerization, and CI/CD. - Ability to operate independently: taking ownership of a problem and driving it forward. - Pragmatic judgment on architecture vs. shipping and learning. - Clear communicator who can articulate tradeoffs and advocate for their approach. Requirements - Our stack includes TypeScript, Python, and PHP across AWS and GCP (Lambda, Cloud Functions, Firebase, Firestore). - Strong engineers from other languages or cloud providers ramp quickly — we care more about fundamentals than specific stack experience. Benefits - Your work directly shapes the product experience for hundreds of thousands of users. - Small, high-caliber team — minimal bureaucracy, fast feedback loops, clear business impact. - High autonomy and real ownership from day one. - A seat at the table in defining how backend engineering evolves here.

• Develop and maintain server apps • Collaborate with front-end developers to integrate user-facing elements • Develop and maintain APIs, optimize API responsiveness and efficiency • Optimize database performance through indexing, caching, and query optimization • Improve code quality through unit and integration tests • Debug and enhance app reliability • Participate in code reviews, daily stand-ups, sprint planning, and retrospectives

• Develop, ship, and maintain features and improvements for Agentic Tools across the GitLab monolith backend in a secure, well-tested, and performant way. • Collaborate with Product Management, UX, frontend, backend, and AI specialists to refine requirements and deliver high-quality, iterative product enhancements. • Design, implement, and review GraphQL, REST APIs and related backend logic, ensuring reliability, scalability, and clear contracts with frontend clients. • Improve and extend automated testing, including RSpec and other frameworks, to strengthen quality, reliability, and developer feedback loops. • Share standards, patterns, and learnings with other engineers, raising the bar for responsible AI integration and evidence-driven engineering across the team. • Participate in Tier 2 on-call rotations to troubleshoot production issues, contribute to root cause analysis, and enhance observability and resiliency