Senior Java Developer (f/m/x)

Sii Poland; Warszawa; On-site; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Great Place to Work

Contracts with the biggest brands

Centre of internal trainings

Profit sharing

Many experts you can learn from

Open and accessible management team

MySii app

Medical care

Job summary

Sii Poland is seeking a Senior Software Engineer in Warsaw to drive the evolution of a complex software platform for a global energy and maritime leader. You’ll own development pipelines, contribute to cloud transformations, and work across Java, Python, React.js, Node.js and Golang.

The role involves setting up cloud environments (GCP/AWS), implementing IaC with Terraform/Ansible, and collaborating with a team to maintain and enhance the platform, while practicing modern CI/CD approaches.

Qualifications

• Minimum 5 years of experience as a Full-stack Java Developer.
• Strong expertise in Java, Python, React.js, Node.js, and Golang.
• Experience with cloud platforms, specifically GCP and AWS.

Responsibilities

• Taking ownership of complex custom software solutions and development pipelines.
• Setting up a cloud-based environment in GCP for development, build, and deployment.
• Collaborating with a team of developers to enhance and maintain the existing solution.
• Utilizing modern technologies including Java, Python, React.js, Node.js and Golang.
• Implementing Infrastructure as Code (IaC) automation using Terraform and Ansible.
• Working with GitHub and CI/CD practices.

Skills

Java

Python

React.js

Node.js

Golang

Cloud platforms

IaC

GitHub

CI/CD

English

Tools

Terraform

Ansible

GitHub

CI/CD tooling

Job description

Join an international team taking ownership of a complex business-critical software platform for a global leader in the energy and maritime industry. As a Senior Software Engineer, you will help drive the platform’s future development, contribute to cloud transformation initiatives, and tackle challenging engineering problems using modern technologies and development practices. This role offers the opportunity to work across software development, cloud, and platform engineering while making a real impact on the product's evolution.

Your tasks

• Taking ownership of complex custom software solutions and development pipelines
• Setting up a cloud-based environment in GCP for development, build, and deployment
• Collaborating with a team of developers to enhance and maintain the existing solution
• Utilizing modern technologies, including Java, Python, React.js, Node.js, and Golang
• Implementing Infrastructure as Code (IaC) automation using tools such as Terraform and Ansible
• Working with version control systems like GitHub and CI/CD tools like GitHub Actions
• Maintaining legacy pipelines in Jenkins as needed
• Exploring opportunities for integrating data streaming solutions such as Kafka or RabbitMQ

Requirements

• Minimum 5 years of experience as a Full-stack Java Developer
• Strong expertise in Java, Python, React.js, Node.js, and Golang
• Experience with cloud platforms, specifically GCP and AWS
• Familiarity with Infrastructure as Code (IaC) automation and scripting tools such as Terraform, Ansible
• Proficient in using GitHub and CI/CD practices
• Advanced level of English

Nice to have

• Experience with data streaming solutions like Apache Kafka or RabbitMQ
• Knowledge of power systems, edge computing, or IoT
• Familiarity with hardware or bare metal solutions

Job no. JOB-CD2LX

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

Benefits For You

• Great Place to Work
• Solid financial situation
• Contracts with the biggest brands
• Centre of internal trainings
• Many experts you can learn from
• Open and accessible management team
• Profit sharing
• Passion Sponsorship program
• Regular integration events and trips
• Comfortable and well-equipped offices
• MySii app
• Medical care