(Senior) Backend Engineer - SRE / Infrastructure (all genders)

In a nutshell

We are looking for our firstSenior 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)

Who we're looking for

This role is perfect for aDevOps / 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 offer

• A 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.

About koppla

At koppla, we're afun 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 arebacked by leading VCs (Earlybird, Newion) and industry angels as we tackle a billion-dollar opportunity problem in an underdigitized and underserved market.

Ourculture 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 toNetflix orAshby).

What you'll be doing

• Own & 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.