Senior Software Engineer, AI-Native Development

MMA is building its first engineering presence in Poland, and you’d be one of the founding engineers on the ground. You’ll work directly with our US-based engineering and product leadership, owning real features end-to-end on a modern AWS stack. We move fast, ship continuously, and expect engineers to use AI coding tools as a core part of how they work — not as a novelty, but to multiply their output. If you want genuine ownership in a small, high-trust team without the bureaucracy of a large captive center, this is that.

This is an individual-contributor role based in Warsaw, with remote or hybrid (coworking) arrangements available.

• Design, build, and ship production features across the stack, owning your work from design through deployment and operation.
• Use AI development tools (Copilot, Cursor, Claude, and similar) fluently to accelerate delivery — scaffolding, refactoring, testing, and debugging at high velocity.
• Build and run services on AWS — primarily ECS, Batch, and Bedrock — taking real responsibility for reliability, performance, and cost of what you ship.
• Work across our stack in TypeScript, .NET, and Python, with infrastructure managed as code in Terraform.
• Collaborate closely with US engineering and product partners across time zones, communicating clearly in writing and keeping work visible.
• Contribute to the engineering standards, practices, and culture of a brand-new team — your habits set the bar for who comes next.

• 4–7 years of professional software engineering experience building and shipping production systems.
• Demonstrated, hands-on experience with AI coding tools and a track record of using them to materially increase output — we’ll want to hear specifics about how you work.
• Strong AWS experience — comfortable designing, deploying, and operating services on the AWS stack, with hands-on exposure to container and batch workloads (ECS, Batch) and infrastructure-as-code (Terraform).
• Proficiency in one or more of TypeScript, .NET, or Python, with the adaptability to work across all three.
• Proven ability to thrive in a fast-paced environment where priorities move and you own outcomes, not just tickets.
• Solid fundamentals in system/API design, testing, and CI/CD.
• Strong written English and the self-direction to work effectively with a remote, US-based team.

• Experience as an early engineer on a new team, product, or site.
• Hands-on work with AWS Bedrock or other LLM/GenAI services in production.
• Experience in marketing measurement and optimization — marketing mix modeling, attribution, media/marketing analytics — or adjacent analytic fields such as data science platforms, experimentation, or large-scale data processing.
• Familiarity with building data- or analytics-intensive applications.

• Real ownership from day one — you build features that ship, not maintenance work carved off from HQ.
• Direct line to US engineering and product leadership, with influence over how this team is built.
• Modern AWS stack and an AI-first engineering culture — we want you using the best tools available.
• Remote or hybrid working in Warsaw, with coworking space available.
• Compensation and benefits — to be discussed. A salary range will be included in the published posting in line with Poland’s pay-transparency requirements.