(Senior) Backend Engineer

In a nutshellWe are looking for our first Senior Site Reliability Engineer (SRE) in Berlin. You’ll work on reliability, scale our infrastructure, and help define how SRE is done at koppla - while staying hands-on. You’ll work side-by-side with our backend engineer and a team of smart, driven product engineers, taking ownership of AWS, Postgres, Kafka and CI/CD pipelines. While this role is SRE focussed, you will also get to also work on the backend and help build new features.Compensation: €75k-100k + 25-35% equity.Location: Berlin (Hybrid, 2+ days/week in office)About kopplaAt koppla, we're a fun and ambitious team on a mission to help the construction industry build more efficiently. We're already partnering with top construction companies and delivering impressive results for our customers (multi-months speed-ups discovered through koppla).Our ambitions are backed by leading VCs (Earlybird, Newion) and industry angels as we tackle a billion-dollar opportunity problem in an underdigitized and underserved market.Our culture is core to who we are - and we've built one we're genuinely proud of. We aspire to create an environment of few but very high-performing team members (similar to Netflix or Ashby).What you'll be doingOwn & evolve infrastructure: Keep koppla’s systems highly available, scalable, and secure.Incident response: Lead on-call rotations, run blameless postmortems, and continuously improve our response processes.Systems: Design, operate, simplify (e.g. swap Kafka with SQS) and optimize services on AWS (S3, Dynamo, Aurora, ECS, IAM, Lambda,).Database reliability: Own Postgres administration (backups, performance tuning, index management) and ensure resilience at scale.Observability: Improve monitoring & alerting (AWS, Sentry and anything you recommend).Networking: Manage VPCs, routing, load balancing, and related components.CI/CD: Automate and streamline pipelines (GitHub Actions).Collaboration and DX: Work closely with our TypeScript-heavy product team to embed reliability and simplicity into every release in a truly cross-functional process.Features: Besides Infra related work, you will help bring in value for customers through backend feature development.Stack: NodeJS, TypeScript, AWS, GraphQL (Apollo), PostgreSQL, Terraform, Kafka, Socket.io. You should be familiar with some of these or similar technologies.Who we're looking forThis role is perfect for a DevOps / SRE engineer with 4-6 years of experience looking to grow their skills and make a meaningful impact at a company that is approaching product-market fit (approaching €2M ARR). You are likely a great fit if:You optimize platform and processes with a dual focus on developer productivity and customer experience.You take a pragmatic approach, harmonizing infrastructure cleanliness with speed of execution.You have solid engineering fundamentals, write clean and efficient code, and are eager to continue improving your skills.You have a solid understanding of performance optimization, distributed architectures, and security for large-scale systems.You can provide a proven track record with incident management and production troubleshooting.You thrive in a fast-paced startup environment, enjoy taking ownership of your tasks, and stay proactive in solving challenges.What we offerA company of co-owners through tax-optimized equity grants.A culture with a focus on transparency, respect, ownership, collaboration and the well-being of each team member on this exciting journey.An environment that values hard-work while still allowing work-life/family integration through 28 days PTO, flexible working hours and a hybrid setup.Dog-friendly office in Berlin with free lunch, besides beverages and snacks.And more: Annual personal training budget of 1,500€, Company supported pension Scheme (”BAV”, 30% contribution), Urban Sports Club Membership and more.