Senior Software Engineer, Platform & Infrastructure (all genders)

About the role

We are a leading SaaS provider in our field and operate a large number of customer environments in our cloud. To ensure that these environments run smoothly, we are looking for you! Together with your colleagues on the Platform & Infrastructure team, you will be responsible for the scalability, security, and efficiency of our cloud infrastructure — covering AWS, Kubernetes, observability, and the internal developer platform that our product teams build on. We ship continuously — on average 150 deployments to production every month — and your work is what keeps that pace fast, safe, and sustainable. You will actively contribute to shaping our technical roadmap, mentor engineers around you, and help cultivate a progressive and learning environment. • Own and evolve our Kubernetes platform across multiple clusters: manage Helm chart deployments via an OCI registry hosting 40+ charts, enforce policy-as-code with Kyverno, and operate GitOps workflows through Argo CD ApplicationSets with progressive delivery orchestrated by Kargo • Drive technical designs for platform initiatives: scope the problem, propose multiple solutions, assess their trade-offs, and defend your recommendation — then see it through to production • Harden the platform's security posture: workload identity via OIDC, runtime security, image scanning and secrets management • Write and maintain custom Kubernetes operators and internal tooling in Go and Python that multiply the team's leverage across clusters — we run Zalando postgres-operator alongside our own operators • Maintain and improve our observability stack (Prometheus, Grafana, Thanos, OpenSearch): build dashboards and alerts that give product teams real visibility into their services • Keep GitLab CI/CD pipelines fast and reliable — they power ~150 production deployments per month; execute cross-team changes (rollouts, database migrations, certificate rotations) with care and clear communication • Operate and evolve AWS infrastructure (EKS, VPC, IAM, RDS, S3) including dedicated customer environments in their own AWS accounts; drive cost-efficiency initiatives tracked via OpenCost • Own incidents end-to-end: from alert to fix to postmortem • Raise the team's bar through thorough code and architecture reviews, mentor less experienced engineers, and help us assess technical candidates in interviews • Be the infrastructure partner product teams come to when things are unclear or broken • Participate in a shared on-call rotation Must-have • 5+ years of professional engineering experience, including 3+ years in infrastructure, platform, or site reliability engineering • Deep hands-on experience with Kubernetes: cluster operations, workload management, troubleshooting at scale • Helm chart authoring: writing, packaging, and maintaining charts — not just consuming them • GitOps experience with Argo CD or an equivalent tool (Flux, etc.) • Working knowledge of AWS (EKS and supporting services such as IAM, VPC, RDS, S3) • Experience with Infrastructure as Code (Terraform or equivalent) • Proficiency in Go or Python — we write custom operators and internal tooling in both • Experience owning production incidents end-to-end — response, mitigation, and postmortem • Strong English communication skills, with the ability to explain technical decisions to both engineers and non-technical stakeholders Nice-to-have • Kubernetes operator development experience (Kubebuilder or similar) • Progressive delivery tooling (Kargo, Argo Rollouts, or equivalent) • Policy-as-code experience (Kyverno or OPA) • Runtime security tooling (Falco or equivalent) • Familiarity with observability tooling (Grafana, OpenSearch/Elasticsearch, or equivalent) • Experience with CI/CD pipelines (GitLab CI preferred) • Experience mentoring engineers or participating in technical hiring • German language skills (helpful for customer site interactions) On-Call You'll participate in an on-call rotation. Incidents require fast response and clear communication. On-call burden is tracked and addressed through rotation and capacity planning. Join our team and simply be yourself – we celebrate diversity! Our entrepreneurial culture is driven by a talented and passionate team. We offer full flexibility to suit your needs, whether you prefer working remotely, in the office, or in a hybrid setup. And if you'd like to work from abroad, you can do so for up to 180 days. But that's not all! We also provide a competitive compensation package and 30 days of paid vacation to help you recharge. And with a generous tech budget, you can choose the hardware and software that suits you best. • Flexible working arrangements (remote, office, or hybrid) • Modern office in the heart of Hanover for hybrid work • Up to 180 days (6 months) of remote work from abroad • Competitive compensation with benefits offering • 30 days (6 weeks) of paid vacation • Modern hardware and software solutions Ambitious, promising, and always on the move: that's SYNAOS. We are a team of around 100 people from more than 15 nations, ranked among the top employers of 2,500+ German startups. We stand together and work toward the same goal: to revolutionize an entire industry. Our platform runs production-critical operations 24/7 for customers like Volkswagen, shipping to production around 150 times a month — and we take security seriously: we are ISO 27001 certified and a TISAX participant. Can you identify with our principles? • We go above & beyond for our customers • We always push forward • We make informed decisions • We challenge each other and win together • We seize ownership • We make bold moves SYNAOS GmbH Liane Hagelganz join-us@synaos.com