Golang Developer (f/m/x)
Offer summary

(Summary generated by AI based on the full job description)

The project is MailOS, a cloud-native email platform for a major Polish market player. The tech stack includes Golang, AWS and microservices, with optional Kubernetes and Terraform. Responsibilities cover designing, developing and maintaining scalable backends, delivering cloud-native solutions, participating in end-to-end delivery and ensuring code quality, security and reliability. Required: at least 2 years of Golang experience, practical AWS and microservices experience, and hands-on use of AI-assisted coding tools (e.g., Claude Code, Codex). Fluent Polish and residency in Poland required.

new

Golang Developer (f/m/x)

Company: Sii Sp. z o.o.

from: 20 October 2026
to: 19 November 2026
salary not specifiedB2B contract (full-time)
salary not specifiedcontract of employment
Offer parameters
level:mid
working mode:hybrid • full office
Kraków, Podgórze
Kraków, PodgórzeWadowicka 12View on map

Requirements

Expected technologies

Golang
AWS
Microservices
AI coding agents

Optional technologies

Kubernetes
Terraform
CI/CD
Python
Java

Our requirements

  • Minimum 2 years of hands-on experience in Golang development
  • Practical experience with AWS and microservices architecture
  • Experience in end-to-end software delivery, including design, implementation, testing, deployment, and maintenance
  • Hands-on experience with AI-assisted software development, including agentic coding tools such as Claude Code, Codex, or similar
  • Ability to document technical solutions and collaborate effectively with development, DevOps, and business teams
  • Fluent Polish
  • Residency in Poland

Optional

  • Experience with Kubernetes, Terraform, and CI/CD pipelines
  • Knowledge of additional programming languages, such as Python or Java
  • Experience in building AI-powered development workflows and automating engineering tasks
  • Advanced level of English

Your responsibilities

  • Designing, developing, and maintaining scalable backend applications using Golang
  • Building and implementing cloud-native solutions based on AWS and microservices architecture
  • Participating in end-to-end software delivery, from requirements analysis and solution design to deployment and maintenance
  • Using AI coding agents throughout the software development lifecycle to enhance productivity and code quality
  • Ensuring code quality, security, scalability, and reliability in all deliverables
  • Collaborating with development, DevOps, and business teams to align technical solutions with business needs
Company

About the project

We are looking for a Golang Developer to join the development of MailOS, a cloud-native email platform for a major player in the Polish market. You will be part of a dynamic team focused on modernizing one of the largest email services in Poland, serving millions of users. This role involves designing, developing, and maintaining scalable backend applications, utilizing AWS and microservices architecture. If you are passionate about leveraging AI-assisted development tools and modern software engineering practices, this opportunity may be the right fit for you.

This is how we work

Golang Developer (f/m/x)
I apply to:
Sii Sp. z o.o.
Kraków, Podgórze
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