Senior Backend/DevOps Engineer f/m/d

About Us

We’re building a new kind of mortgage experience: transparent, digital, and truly customer‑centric. We are a Berlin-based B2C Fintech founded by two repeat founders (YC alum, exit) with prior 10+ year careers in investment banking and strategy consulting. We recently raised investment to assemble a 30‑person, exceptionally strong core team. Our culture is built on ownership and clarity. We align on vision, set clear KPIs and resources together, and then trust your drive and expertise.

Opportunity

Buying property (and financing it) is probably the biggest financial decision in someone’s life. It’s complicated and opaque. As a Senior Backend / DevOps Engineer, you will work alongside our CTO on building and evolving our fintech product. Our core architecture and cloud infrastructure are already in place and running in production — you’ll spend roughly 70% of your time shipping backend features and 30% on infrastructure and operations. You’ll have significant autonomy to shape how we build, deploy, and scale.

Responsibilities

• Develop backend features and APIs within our microservices architecture
• Design and implement event‑driven patterns and workflow orchestration
• Work with PostgreSQL — schema design, migrations, query optimization
• Integrate with external APIs (mortgage platforms, CRM, document processing)
• Extend cloud infrastructure (Terraform, Helm) for new services and capabilities
• Improve CI/CD pipelines and deployment processes
• Implement monitoring, logging, and observability systems
• Optimize system performance, reliability, and scalability
• Collaborate on technical decisions and architecture evolution
• Ensure code quality, security, and operational best practices

Technology Stack

• Backend: Node.js, TypeScript (strict), Fastify
• Database: PostgreSQL, Redis (caching, streams, sessions)
• Orchestration: Temporal (self‑hosted) for durable workflows
• Architecture: Microservices monorepo, event‑driven with CDC pattern, real‑time via Socket.io
• Monitoring: Prometheus, Grafana (structured logging, metrics, alerting)
• Cloud: GCP — GKE Autopilot, Cloud SQL, Memorystore, Cloud Storage, Document AI
• Infrastructure: Terraform, Helm, GitHub Actions CI/CD, Cloudflare
• AI/ML: LLM integrations (OpenAI, Anthropic, Google), GCP Document AI for document processing
• Frontend: React 19, Vite

Required Qualifications

• Strongly‑Typed Backend Language: Proficiency in at least one strongly‑typed, compiled or strictly‑typed language (e.g., Go, TypeScript, Rust, Java, C#, Kotlin) for building high‑performance backend services; solid grasp of async patterns, concurrency, and performance optimization
• Event‑Driven Architecture: Hands‑on experience designing and implementing event‑driven systems with messaging patterns (Kafka, RabbitMQ, GCP Pub/Sub, or Redis Streams) including eventual consistency, saga patterns
• Microservices Architecture: Proven track record building, deploying, and scaling microservice‑based systems in production; knowledge of service decomposition, distributed transactions, and common pitfalls
• GCP Hands‑On Experience: Real production experience with GCP (GKE, Cloud SQL, Memorystore, Cloud Storage, Secret Manager, etc.) and confidence navigating the ecosystem

Additional Technical Skills

• Extensive experience with SQL databases (PostgreSQL preferred)
• Strong foundation in RESTful API design
• Proficiency with containerization (Docker) and orchestration (Kubernetes)
• Experience with CI/CD tools (GitHub Actions, Cloud Build, or similar)
• Infrastructure as Code with Terraform or similar
• Node.js/TypeScript experience is a plus (our current backend stack)
• Understanding of observability: structured logging, distributed tracing, metrics, and alerting
• Knowledge of API security, authentication/authorization (OAuth 2.0, JWT) and data protection
• Experience with workflow orchestration (Temporal or similar) is a strong plus
• 0→1 Production Experience: You’ve launched production features and handled edge cases, ensuring reliability and managing surprises
• Pragmatic Perfectionism: Balance technical excellence with business velocity; refactor or ship quickly as needed
• Ownership Mentality: Proactive, resourceful, accountable; don’t wait to be told what to do
• Team Player: Collaborate well, give and receive feedback, elevate teammates
• Systems Thinking: Design for reliability and maintainability; think beyond immediate features
• Clear Communication: Explain technical decisions to non‑technical stakeholders, document work, contribute constructively in discussions
• Continuous Learner: Stay current with industry trends, experiment, enjoy technical challenges

Benefits

• Competitive salary
• Participation in our employee options programme
• On‑site in Berlin with flexible remote work as you prefer
• High autonomy, low politics, fast decision‑making
• The chance to help build something new, with real influence on how people buy homes in Germany

Equal Opportunity Statement

We are an equal opportunity employer. We value diversity and are committed to an inclusive environment for all employees. If you are excited about the role but don’t meet 100% of the requirements, we would still love to hear from you.