Senior DevOps and Infrastructure Engineer

Location: Office based in Bratislava, remote with once per week/month working day in office Languages: Slovak & English (Proficient) We are a focused, agile team of 20-30 people driving the future of energy. We operate as a B2B service provider across Slovakia and the Czech Republic, with active expansion into Ukraine, Bulgaria, and Austria. Our core business is intelligent energy management. We manage batteries and energy resources, trade on electricity markets to generate revenue for clients, and help stabilize distribution networks to reduce reliance on fossil fuels. We are looking for a Senior Dev-Ops & Infrastructure Engineer who wants to own the infrastructure that keeps a real-time energy grid running. You will build and maintain the cloud platform, CI/CD pipelines, and observability stack that our engineers and data scientists depend on every day. The Tech Stack We use modern tools to solve complex, high-frequency data problems. Everything runs on AWS, single provider, single region, fully infrastructure-as-code. Domain Technologies Compute ECS Fargate, AWS Lambda, AWS Batch Networking VPC, NAT gateways, ALB, Transit Gateway, IPSec VPN, OpenVPN Data & Messaging TimescaleDB, MSK (Kafka), Glue Schema Registry, S3 Device connectivity AWS IoT Core, ACM Private CA Observability OpenSearch, Prometheus, Grafana, ElastAlert2, CloudWatch IaC & Config Terraform, Terragrunt, Ansible CI/CD GitHub Actions, Docker, ECR Security Secrets Manager, KMS, CloudTrail, Google SSO What You Will Do Operate & Maintain: Administer GNU/Linux based VMs and keep our production environment healthy and secure.Containerize: Build, maintain, and deploy Docker containers to our VMs and orchestration platforms (ECS/Fargate).Automate Infrastructure: Design and maintain Terraform/Terragrunt modules and Ansible playbooks to provision and manage AWS infrastructure.CI/CD Ownership: Build and improve CI/CD pipelines (GitHub Actions) so deployments are fast, safe, and repeatable.Observe & Alert: Set up and maintain monitoring/alerting with Grafana, Prometheus, ELK, and OpenSearch to catch issues before they impact customers.Collaborate: Work closely with backend engineers and data scientists to support their deployment and infrastructure needs. Must Haves Linux Fundamentals: Solid experience operating and maintaining GNU/Linux based VMs.Scripting: Comfortable working in the terminal with Python/Bash scripts.Containers: Hands-on experience with Docker — creating, maintaining, and deploying containers to VMs or an orchestration platform.Data Formats: Working knowledge of JSON, XML, YAML.CI/CD: Understanding of CI/CD concepts and experience with CI/CD pipelines.Language: Fluent in Slovak and English.Independence: You are a problem-solver who can work independently and as part of a team.EU Eligibility: You must be eligible to work within the European Union.Culture Fit: We have a strict “No A**hole” policy. We are a friendly bunch, and we want to hire someone we’d genuinely enjoy having a coffee (or beer) with.Experience with Terraform/Terragrunt and Ansible automation.Deeper knowledge of the AWS ecosystemNetworking stack knowledge: firewalls, routing/NAT, load balancers/failovers. Nice to Have Experience with Ansible automation.Exposure to ML-Ops.Security domain knowledge: X.509 certificates, SSH/PGP, Basic Auth/OAuth/SSO SAML.Background in energy, IoT, AI, or algorithmic trading. What We Offer Flexibility: Work from our shared office in Bratislava (great for collaboration) or fully remote.Real Impact: Your infrastructure directly keeps our green energy platform running.Freedom: We prioritize results over micromanagement. You will have the freedom to choose the right tools for the job.Team Vibe: A flat structure, open communication, and employee shares in the company. ‹ Senior Software Engineer (Java/Python)