Senior DevOps Engineer (AWS Platform & Backend Support)

We are looking for a Senior DevOps Engineer to take ownership of our cloud infrastructure and help evolve a modern AWS-based platform. You will work on reliability, observability, automation, security, and CI/CD - and occasionally support backend engineers with troubleshooting or small contributions to our backend services., * Own and improve AWS infrastructure across staging and production environments.

• Build, maintain, and standardize Infrastructure-as-Code using Terraform.
• Manage and optimize containerized workloads on ECS Fargate.
• Strengthen observability: metrics, dashboards, alerting, and logging.
• Improve CI/CD pipelines using GitHub Actions.
• Enhance IAM, secrets management, and overall cloud security posture.
• Perform maintenance of databases running on RDS (Postgres, MySQL).
• Support backend teams with debugging, migrations, or small changes in Node.js/NestJS when needed.
• Drive automation, reliability, and scalability across the platform.

• Lambda
• RDS (MySQL/Postgres)
• SQS/SNS
• CloudWatch
• S3

• Strong experience with Terraform.
• Deep understanding of AWS networking and secure infrastructure design.
• Experience operating RDS (backups, upgrades, failovers, troubleshooting).
• Hands-on CloudWatch experience (metrics, dashboards, Logs Insights, alarms).
• Good understanding of event-driven systems (SQS, SNS, Lambda triggers, retries, DLQs).
• Strong proficiency with Docker and containerized deployments.
• Experience with GitHub Actions and modern CI/CD workflows.
• Programming skills in Python or Golang.
• Working knowledge of Node.js/NestJS to support backend engineers occasionally.

Additional Desired Experience

• Experience with Docker image hardening and optimization (multi-stage builds, non-root users).
• Familiarity with API gateways or automating OpenAPI specifications.
• Experience integrating SSO/SAML/OIDC for cloud and internal tools.
• Experience with KMS (nice to have).
• Experience improving secrets management.
• Experience building reusable CI/CD components (custom GitHub Actions).
• Experience setting up a monitoring stack.
• Familiarity with secure file transfer mechanisms (SFTP/SSH key setups).
• Experience with distributed backend architectures (microservices, event-driven, multi-service systems)., * Have 5+ years of experience as a DevOps Engineer.
• You take ownership and think long-term.
• You are systematic, structured, and pragmatic.
• You communicate clearly and proactively.
• You collaborate easily with backend engineers and product teams.
• You bring calmness and maturity during incidents and debugging.
• You are able to quickly learn new technologies and apply them to solve problems.

Pulled from the full job description

• Pension plan
• Work from home, How? Through variable tariffs, dynamic pricing, smart EV charging, heat pump and solar optimization, and Germany's first virtual power plant: NeoGrid.

At Ostrom, you'll work in a dynamic, open environment where you can be yourself, take on challenges, and grow both personally and professionally.

Environmental Impact: Each customer who switches to Ostrom on average helps offset 1.5 tons of CO2 emissions per year compared to the average German energy mix.

VSOP: On top of offering a competitive salary you will have access to company shares to ensure you can truly be part of the journey.

Trust-based Team: A truly flat hierarchy and transparent company culture, where everyone's voice matters.

Benefits: An annual learning budget, company-pension scheme, company events, discounted USC membership, discounted BVG public transport ticket, e-bike or e-moped, exclusive discounts via FutureBens or monthly vouchers - the choice is yours.

We are on the mission to build Europe's leading energy management platform to provide fair, clean energy to everyone. We're a diverse team of 50+ employees, with 46% being female and from 16+ nationalities, and steadily growing. Having raised of over €40 M in total, we are looking for passionate people to join us on our mission! Wir haben eine klare Mission: Wir bauen Europas führende Plattform für Energiemanagement, um faire und saubere Energie für alle zugänglich zu machen. Unser Team ist vielfältig - wir sind über 50 Personen aus mehr als 16 Nationalitäten, mit einem Frauenanteil von 46 %. Und wir wachsen weiter! Mit über 40 Mio. € an Finanzierung suchen wir nach motivierten Menschen, die gemeinsam mit uns die Energiezukunft gestalten wollen., We're Germany's fastest-growing digital green energy provider and a Certified B Corp , driving the energy transition by making renewable energy more accessible and inclusive., Stay In The Loop: We believe in transparent communication - from weekly town halls and quarterly updates to regular retrospectives. Got feedback or an idea? We're all ears. Work Together, Celebrate Together: We thrive on collaboration. Wins are shared and so are the celebrations from monthly happy hours to team trips and company events.