Principal LLM Engineer Jobs

Supercell

Location:
Finland, Helsinki

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

Supercell is looking for an entrepreneur disguised as an engineer — someone who’s obsessed with building real things, thrives on autonomy, and is energized by big, undefined problems. We want a person who treats AI as a playground for creation — who can imagine bold applications, prototype fast, and ship production-grade systems that change how we work and play. Someone who wants to set the standard for what “great” looks like in LLM engineering — and who’s excited by the idea of doing it inside one of the most creatively free companies in the world.

Job Responsibility:

Build and ship bold ideas: Design, prototype, and deliver production-grade LLM and agentic systems — from creative tools to intelligent in-game and internal agents
Own the craft: Define how we design, evaluate, and scale LLM applications across Supercell. Set the bar for quality, reliability, and creativity
Move fast and take risks: Try new frameworks, break things safely, and push the limits of what’s possible with emerging models and tools
Collaborate like a founder: Work closely with game teams, engineers, and artists to find high-impact opportunities — and make them real
Inspire and enable: Help others across Supercell build confidently with AI, sharing insights, frameworks, and reusable components

Requirements:

Proven track record building production LLM or agentic applications — ideally shipped or widely used
Deep technical grounding in Python, APIs, orchestration, evaluation, monitoring, and modern LLM frameworks (LangChain, LlamaIndex, OpenAI, Anthropic, vLLM, etc.)
Entrepreneurial mindset: You’ve built from scratch, taken bets, and thrived in environments with freedom and ambiguity
Strong product sense and creativity — able to turn vague ideas into concrete, delightful experiences
Excellent communicator and evangelist — you bring others along and create excitement
Curiosity and appetite for risk and experimentation. You move fast and learn faster

Nice to have:

Bonus: interest in games, creativity, or building tools that empower others

What we offer:

Relocation support: dedicated mobility team and partners will support you throughout your move

Additional Information:

Job Posted:
December 12, 2025

Employment Type:

Fulltime

Work Type:

On-site work

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Principal LLM Engineer