Senior DevOps Platform Engineer (AWS)

SeaOwl Energy Services (France); Kraków; On-site; PLN 180,000 - 260,000; Full time

Job summary

SeaOwl Energy Services (France) is seeking a Senior Platform Engineer with strong DevOps experience to build scalable platforms enabling rapid delivery. Based in Krakow, you will design, automate, and own platform reliability across multi-account AWS environments.

You will lead the development of secure defaults, IaC pipelines, and self-service templates, collaborating with application teams to shipping safe, observable deployments.

Qualifications

• 4+ years of hands-on AWS experience in multi-account environments.
• Proficient with Terraform (modules, state, guardrails).
• Experience operating EKS or ECS in production.
• Development experience to collaborate with application teams.

Responsibilities

• Build and maintain core platform components (SSO, access, clusters, networking, CI/CD).
• Own Terraform modules, baseline configurations, and guardrails.
• Design secure platform golden paths and standards.
• Maintain platform IaC and multi-account governance.
• Lead platform abstraction layers and service catalogs.
• Operate and evolve platform-wide logging, metrics, tracing.

Skills

Platform engineering

AWS multi-account

Terraform IaC

EKS/ECS

CI/CD pipelines

GitHub Actions

Security by design

Observability

Tools

Terraform

CDK

Job description

Job Purpose

We are looking for a Senior Platform Engineer with strong DevOps experience, combining deep operational expertise with a development background. You are comfortable working at the intersection of infrastructure, security, and application development, and you enjoy enabling other teams to move faster through welldesigned platforms and abstractions. You bring both a builder and operator mindset: you design scalable systems, automate everything possible, and take ownership of platform reliability in production.

Description

Annual renewable contract

Based in Krakow

Need to speak Polish & English

Start date ASAP

Job Purpose

We are looking for a Senior Platform Engineer with strong DevOps experience, combining deep operational expertise with a development background. You are comfortable working at the intersection of infrastructure, security, and application development, and you enjoy enabling other teams to move faster through welldesigned platforms and abstractions. You bring both a builder and operator mindset: you design scalable systems, automate everything possible, and take ownership of platform reliability in production.

Key Responsibilities

• Build and maintain core platform components (SSO, Access Management, clusters, networking, CI/CD, observability).
• Own Terraform modules, baseline configurations, and guardrails for distributed teams.
• Design and evolve platform “golden paths” — secure defaults, templates, and standards.
• Maintain platform IaC (Terraform, modules, state design, multi-account governance).
• Integrate with team-owned CDK stacks through stable platform contracts.
• Lead evolution of platform abstraction layers and service catalogs.
• Design and manage multi-account AWS landing zone (Orgs, SCPs, permissions boundaries).
• Own developer onboarding patterns (IAM SSO access, automation, pipelines).
• Build safe cross-account deployment workflows (GitHub OIDC, least privilege).
• Design and operate ECS and EKS clusters used by hundreds of services.
• Establish best practices for container execution, networking, autoscaling
• Manage central networking components (VPC, TGW, Route53).
• Ensure secure east–west communication between workloads in different accounts.
• Provide self-service tools and templates for teams (pipelines, service definitions, actions).
• Abstract platform complexity to enable fast and safe deployments for all teams.
• Own documentation, workshops, patterns, and architectural guidance.
• Operate and evolve platform-wide logging, metrics, and tracing systems.
• Ensure operational standards for platform components.

You are meant for this job if:

• Strong experience as a Platform Engineer / DevOps Engineer operating production systems at scale
• Proven +4 years hands-on expertise with AWS, especially multi-account environments and organizational governance
• Deep understanding of Infrastructure as Code, particularly Terraform (modules, state management, guardrails)
• Solid experience running and operating EKS and/or ECS in production
• Have platform development experience
• Have multi-account experience
• Have software development experience
• Strong background in CI/CD, GitHub-based workflows, and secure deployment patterns (OIDC, least
• privilege)
• Experience designing developer platforms and internal tooling for self-service and standardization
• Strong understanding of cloud security, IAM, SCPs, permissions boundaries, and secure networking
• Operational excellence mindset: monitoring, logging, alerting, SLOs, and incident handling

In addition to infrastructure and operations, you have hands-on development experience, allowing you to collaborate closely with application teams and design pragmatic platform contracts:

Professional experience developing services in one or more of:

• Java / Kotlin (Spring Boot)
• Node.js / TypeScript

Familiarity with modern API design, service runtime concerns, and container-based workloads

Ability to read, debug, and contribute to application code when needed