Principal Software Engineer - Product Platforms

You'll define and build shared, API-first product platforms that power multiple product surfaces, integrations, and agentic workflows. You'll stay close to the code while shaping how product platforms are designed, evolved, and adopted across the company. You'll work across multiple teams and domains, aligning long-term technical direction while still owning end-to-end systems. This role blends hands-on engineering with cross-product technical leadership, and you'll enjoy building, prototyping, iterating, and solving complex problems in production.

Responsibilities

• Act as a technical owner and force multiplier for API-first architecture across the company
• Design, build, and evolve high-scale APIs used by internal teams, external customers, and intelligent agents
• Lead the development of agentic workflows, including orchestration, state management, tooling, and integration patterns
• Drive API standards, design principles, and best practices through hands-on work and technical reviews
• Tackle complex cross-team problems where requirements are ambiguous, and constraints are real
• Partner with Product, Platform, and SRE teams to ensure APIs are reliable, observable, secure, and scalable
• Identify and reduce systemic technical risks while enabling teams to move faster
• Mentor senior engineers and raise the technical bar through example, not hierarchy

Requirements

• Extensive experience as a senior staff/principal-level software engineer working on applications and backend systems
• Experience building product platforms or shared services consumed by multiple product teams
• Proven track record of designing, building, and operating APIs at scale
• Strong hands-on experience with RESTful APIs
• Some experience with GraphQL (design, usage, or operating in production)
• Deep understanding of system design, performance, reliability, and evolution over time
• Strong bias toward hands-on contribution and ownership of real systems
• Ability to influence technical direction across teams through credibility and execution

Benefits

• Relocation support for single employees, couples and families
• Flexible working arrangements with a distributed company culture
• Private healthcare services from Terveystalo
• 2 weeks of vacation granted up front, and possibility to use vacation days as they accrue
• Access to gym room
• Gaming room
• Free parking near the office
• Mobile phone
• Lunch benefit
• Mobile plan
• Home internet
• Remote work equipment