Lead Backend Engineer (m/f/d)
Wallstreetonline Capital Ag
Posted: December 25, 2025
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Job Description
Your mission:
As a Lead Backend Engineer , you will play a key role in evolving our core backend platform. You will shape the technical roadmap, take ownership of architectural decisions, and lead a growing team of backend engineers. Together, we will elevate performance, scalability, and developer productivity to the next level. Define the technical vision for our backend architecture and set clear priorities in close collaboration with product and engineering stakeholders. Take technical and functional leadership of one or more backend teams, acting as mentor, coach, and sparring partner. Ensure robust, maintainable, and high-performance services that operate reliably under production load in a microservices or modular domain architecture. Support the team in selecting, introducing, and continuously improving backend technologies, CI/CD pipelines, observability solutions, and testing strategies. Work closely with frontend, mobile, DevOps, and product teams to deliver end-to-end solutions that create real value for our customers.
Your profile:
Several years of experience as a backend engineer with strong expertise in relevant programming languages and technologies (e.g. Java, Kotlin, or comparable stacks). Proven experience in technically leading and mentoring software engineering teams. Deep understanding of scalable microservices architectures, messaging patterns, databases (SQL/NoSQL), and cloud platforms. Hands-on experience owning and documenting architectural decisions in complex systems. An agile mindset, high quality standards, and a proactive, solution-oriented approach. Strong communication skills in English and/or German is a plus. WE OFFER A modern work environment in an established, fast-growing FinTech company. Hybrid work model with flexibility between our Berlin office and remote work. Competitive compensation and performance-based bonuses. Training budgets, access to tech conferences, and ample room for professional and personal growth. A strong, collaborative team culture with open and transparent feedback. Modern technical infrastructure and tools that enable you to work efficiently and effectively.