Senior AI Engineer (Engine Reliability)

Location: Onsite in Helsinki or London. Relocation support is available.

Company

hirify.global is a Helsinki-based games company creating and operating mobile games and the Titan game engine, including Hay Day, Clash of Clans, Boom Beach, Clash Royale, and Brawl Stars.

What you will do

• Design, build, and ship AI-native engineering capabilities for engine and game development, integration, validation, and delivery.
• Partner directly with game teams to understand workflows, prototype solutions, and bring them into real-world use.
• Build agentic systems for code-change understanding, failure investigation, solution generation, behavior validation, and actionable feedback.
• Develop evaluations and feedback loops to measure the reliability and usefulness of AI-driven systems.
• Make autonomous agents dependable through guardrails, human checkpoints, observability, and reliability infrastructure.
• Build integration validation, automated testing, and realistic environments across real devices and services while shaping reusable capabilities across games.

Requirements

• Track record of shipping LLM or agentic applications used by real users in production.
• Strong applied knowledge of modern generative methods, including model capabilities, limitations, and reliable implementation.
• Hands-on experience building agent workflows and tool use, with evals, guardrails, and observability.
• Strong software engineering depth, including maintainable code ownership in production.
• Strong product and engineering judgment, with the ability to understand team problems, challenge assumptions, and turn emerging technology into practical solutions.
• Experience with build systems, CI pipelines, scripting, and developer tooling.
• Strong collaboration skills and comfort working with engineering teams, navigating ambiguity, and driving work from exploration through adoption.

Nice to have

• Games industry experience and appreciation for mobile games.
• Game engine or runtime development experience and credibility with engine engineers.
• Professional C++ experience sufficient to read and debug engine and runtime code.
• Experience with fine-tuning, model adaptation, or distillation.
• Experience debugging cross-platform issues on iOS, Android, macOS, or Windows.
• Experience with device automation, device farms, or test frameworks such as Catch2 or gTest.
• Experience with observability tools such as Sentry, logs, metrics, or tracing, including AI-based crash and log analysis.
• Experience improving testability or reliability in shared engine or platform code.

Culture & Benefits

• Work in an autonomous, high-skill Reliability team closely partnered with engine and game teams.
• Independent cells, trust, freedom, and autonomy are central to the working culture.
• Compensation, work environment, and resources are designed to support employees as people.
• Dedicated mobility support and relocation partners assist with moves from any location, including accompanying family members.
• Recruitment accommodations are available when needed.

Hiring process

• Apply through the application form at the bottom of the hirify.global careers page.