Senior Platform Engineer (AI & AWS)

We want to create a different kind of banking and shopping experience. Northmill was founded in 2006 and the main office is in Stockholm and Poland Engineering Center site is located in Katowice. Grab this opportunity to be a part of us and our journey!

The scope of your role:
• As a Senior Platform Engineer, you will take part in the process of designing and developing AI solutions using Amazon Bedrock and Amazon Quick AI.
• You will have an impact on our engineering practices by partnering with development teams and helping them prepare solutions for scalable, secure and deterministic agentic development.
• You will be responsible for driving the continuous evolution of our AI platform, ensuring it adopts best practices of GenAI use in SDLC and business processes automation.
• You will participate in evaluation, cost optimisation, and governance of tooling, LLMs and design patterns for an agentic approach.
• You will work with: AWS, GitHub Actions, GitHub Copilot, Cursor, Google Gemini, Jira, Confluence, and Git.
• You will work using modern AI dev tools.

Required qualifications:
• 5+ years of commercial experience in software engineering.
• Solid experience with Amazon Bedrock & Amazon Quick AI.
• Solid experience in Python and adjacent tools.
• Solid experience with prompt engineering and prompt testing (structured outputs).
• Experience with designing harnesses for coding assistants, understanding of modern agentic patterns.
• Experience with cost optimization of GenAI solutions.
• Experience with using Claude Code, Codex, Cursor or similar agent frameworks.
• Understanding of data security and other risks associated with agentic workflows.
• Willingness and interest to collaborate and work in a team.

Preferred qualifications:
• Experience with other AI oriented AWS services like Amazon Sagemaker or AWS Transcribe.
• Experience with the AWS platform beyond AI oriented services.
• Experience with working with Model Context Protocol (MCP) servers.
• Experience with scripting using PowerShell 6+.
• Experience with software engineering best practices and modern delivery standards.
• Exposure to microservice infrastructure.
• Exposure to Infrastructure as Code and platform engineering practices.
Exposure to Agile development methodologies.

About you?
You are a creative and curious person. We are always looking for new knowledge and have a curiosity out of this world, we think that you have the same mindset and you are excited to read about the latest tech trends.
We hope you are not afraid to inform about problems and have your thoughts on various solutions.
You are a team player and used to work in an Agile environment.
Since we are a multicultural team English is the required language.

We offer:
• Work on projects (including greenfield ones) within a team of top experts — the best in Europe 💪
• Real impact on company products and culture, with small project teams (max. 9 members)
• A non-corporate atmosphere with a strong focus on innovation, continuous improvement, teamwork, and a data-driven approach
• Flexible working hours in a hybrid model — office in Katowice city center or remote work if you live outside Silesia region
• Support for your professional growth, including access to training, workshops, and industry conferences
• Benefits package: private medical care, life insurance, Multisport (including a partially funded family card), library, concierge service
• Internal conferences, trainings, and events: Northcon (annual company conference in great locations like Spain, Austria, Sweden, Croatia), Northchill, Study Group, Summer Party

About Northmill Bank
A Swedish bank with the heart in the technique. 2.500 merchants. 600.000 end users.
310 employees in four different countries, including Engineering Center hiring c.a. 80 experienced engineers. The goal? To improve financial life by being digital, yet personal.

Apply today and be a part of Northmill!