Staff Engineer - API-team - Product Platforms

AlphaSense Oy; Helsinki; On-site; EUR 120,000 - 170,000; Full time

Benefits offered by this job

Private healthcare

Relocation support for employees

Flexible working arrangements

Job summary

AlphaSense Oy is seeking a Staff Software Engineer to help build shared, API-first product platforms powering multiple product surfaces, integrations, and agentic workflows. You will own end-to-end API design and platform evolution while staying close to code and guiding teams across the organization.

You will design, build, and operate RESTful APIs at scale, with some GraphQL exposure, and partner with Product, Platform, and SRE teams to ensure reliability, observability, and security.

Qualifications

• Significant experience as a senior or staff-level software engineer.
• Experience building product platforms or shared services.
• Track record of designing, building, and operating APIs at scale.
• Some experience with GraphQL (design, usage, or operating in production).
• Solid 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 within and across teams through credibility and execution.

Responsibilities

• Serve as a technical owner for API-first systems within your team and domain.
• Design, build, and evolve high-scale APIs used by internal teams, external customers, and intelligent agents.
• Apply API governance, versioning strategies, and backward compatibility in your systems.
• Contribute to API standards, design principles, and best practices through hands-on work and technical reviews.
• Tackle complex 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 technical risks within your domain.
• Mentor engineers and raise the technical bar through example.

Skills

Senior software engineer

Backend systems

API design

RESTful APIs

GraphQL

System design

Mentoring

Ownership

Job description

We're looking for a Staff Software Engineer to help build shared, API-first product platforms at AlphaSense that power multiple product surfaces, integrations, and agentic workflows.

In this role, you'll focus on building platforms as products: well-designed APIs, clear contracts, strong reliability guarantees, and delivery driven by real product needs. These platforms are consumed by internal product teams and external integrations, including AI agents.

This role sits at the intersection of hands-on engineering and technical leadership within the team. You'll stay close to the code while helping shape how product platforms are designed, evolved, and adopted. You'll collaborate across teams and own end-to-end systems within your domain. This is not a people-management role, nor a purely advisory architecture role. We're looking for a Staff engineer who enjoys building, prototyping, iterating, and solving complex problems in production.

What you'll do:

• Serve as a technical owner for API-first systems within your team and domain
• Design, build, and evolve high-scale APIs used by internal teams, external customers, and intelligent agents
• Apply API governance, versioning strategies, and backward compatibility in your systems
• Contribute to API standards, design principles, and best practices through hands-on work and technical reviews
• Tackle complex 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 technical risks within your domain
• Mentor engineers and raise the technical bar through example

Who you are:

• Significant experience as a senior or staff-level software engineer working on applications and backend systems
• Experience building product platforms or shared services consumed by multiple teams
• Track record of designing, building, and operating APIs at scaleStrong hands-on experience with RESTful APIs
• Some experience with GraphQL (design, usage, or operating in production)
• Solid 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 within and across teams through credibility and execution

Nice to have:

• Experience building or enabling agentic or AI-driven workflows
• Familiarity with MCP (Model Context Protocol) or similar agent integration patterns
• Experience working in large-scale, distributed systems environments
• Experience working closely with platform and SRE teams

What we Offer:

• Playing a part in the story of a fast growing compnay
• Interesting career opportunities and training
• Relocation support for single employees, couples and families
• While we do have an office in Helsinki, we’re a distributed company. We value outcomes over time, and offer flexible working arrangements. We usually meet at the office once a week.
• 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, and many more....