Lead Software Engineer, Frontend Platform Team

About the role

As the Lead Software Engineer for our Frontend Platform team, your mission is to build a production-ready frontend ecosystem engineered from the ground up for autonomous and AI-assisted software development. This is a greenfield role where you will scale our early-stage architecture into a robust production environment and establish our core design system from scratch.

Instead of building a traditional developer platform solely for human engineers, you will design a highly deterministic repository structure, runtime abstractions, and strict architectural guardrails. Your primary goal is to ensure that AI agents have the high-fidelity context, type safety, and safety nets they need to safely ship high-performance UI features for our 5+ product engineering teams. You will head our Frontend Center of Excellence, redefining what it means to build software when AI is the primary author.

What you’ll do

• Lead the frontend platform: Take technical ownership of our multi-tenant micro frontend architecture, driving the technical roadmap to establish a production-ready ecosystem for 15–20+ engineers.
• Embed AI agents into the development lifecycle: Architect and standardize workflows where frontend features are predominantly generated by AI agents rather than through manual coding.
• Build platform capabilities: Design and scale developer facing features inherent to high scale micro frontends, including independent deployment pipelines, preview environments, runtime sandboxing, etc.
• Integrate design systems (Nice-to-have): Partner with design team to map design tokens and UX specifications into a unified, headless UI foundation, ensuring consistent theme adoption across all product teams.

What we're looking for

• Platform Execution & Leadership: A technical driver who can take an in-progress architectural vision, establish momentum, and push it across the finish line. You know how to bring people along, influence across multiple product teams without formal authority, and manage the full platform lifecycle, from controlling bundle bloat to zero-downtime upgrades.
• Frontend at Scale: Proven experience architecting and scaling frontend platforms for organizations of at least 15–20 developers. You have deep, practical expertise managing multi-team workspaces using Turbo, Nx, and pnpm, with a relentless focus on maximizing development speed and minimizing friction.
• Agentic Workflow Mastery: Exceptional proficiency in prompting, orchestrating, and instructing AI agents to reliably generate production-grade features. You know how to make agents produce exactly what is required and how to tightly integrate them into the dev lifecycle.
• Architectural Depth & Adaptability: High-level React and TypeScript expertise, used less for manual coding and more for reviewing, debugging, and verifying agent-generated architecture within complex multi-tenant environments. You possess the technical breadth to expand into backend and full-stack infrastructure as the system matures.

Salary range

Our salary range for a Lead Software Engineer is between 6200-7000 EUR, and we are open to discussing higher compensation for particularly senior profiles.

Why you'll love this role

• True Architectural Ownership: This is a rare, greenfield opportunity to design a modern frontend ecosystem exactly the right way from its earliest stages, without the burden of heavy legacy code.
• High-Leverage Impact: Your work directly builds the daily working environment and foundation for dozens of engineers, meaning every foundational decision you make has a massive compounding effect on organizational velocity.
• Shape the Future of Work: You will define how our organization safely transitions to an AI-native engineering model from the start, designing the abstractions that keep quality high as development cycles accelerate.
• People-First Culture: We actively invest in keeping developer friction low, minimizing technical debt, and ensuring our platform engineers have the time and space to solve foundational engineering problems correctly.

What it's like working at Sievo

• You’ll get to build the leading procurement analytics software that helps a rapidly growing number of Fortune 500 and other largest companies across the globe to understand and optimize their spend and supply chain.
• One of the coolest offices in the heart of Helsinki – or if you prefer, a flexible hybrid working model. We also provide all essential tools to work remotely.
• Freedom and responsibility. We are looking for people who yearn for this freedom, can make the most out of it and are willing to take on the responsibility.
• International team members coming from over 40 nationalities.
• Awesome perks including equity program, extensive healthcare, phone plan, home internet connection, referral bonus, and many more!

How to apply

We would love to hear from you!

Please send us your application with the CV. We would love to learn about your strengths and what excites you about this opportunity. We will review applications as they come in. The position will be filled as soon as we find the right candidate.

Meet Sievo
We are Sievo – the leading procurement analytics SaaS company founded and headquartered in Finland. We help the largest companies in the world, household brands like Levi’s, Kellogg’s and Mondelez, understand their procurement data, make data-driven decisions, reduce emissions, drive supply chain resilience, and beyond. Each year, we process over 2% of the world’s total spend. Pretty cool, right?

At the core of our success are talented people from all over the world with different backgrounds and perspectives. Our 400+ Sievonians are based across Helsinki, Chicago, Bucharest and London. Our core values are caring, exceeding, and honesty, and these values make us grow bigger and better, not bigger and bitter.

At Sievo, we celebrate and support differences and strive to create a culture where everyone feels valued and included. As an Equal Opportunity Employer, we do not discriminate against any individual in hiring or employment based on gender, gender identity or expression, age, ethnic or national origin, nationality, language, religion or belief, opinion, disability, state of health, sexual orientation, or other personal reasons.

We acknowledge the impact of imposter syndrome during job search, especially for underrepresented groups. If you're interested in the position and believe that you have the potential to excel in it, we encourage you to apply.