Senior Software Engineer (Node.js)

TL;DR

Senior Software Engineer (Node.js): Building and optimizing a massive creative production rendering engine with an accent on distributed systems and high-load API design. Focus on scaling image rendering to billions of units monthly and improving infrastructure performance.

Location: Hybrid in Helsinki, Finland (minimum 3 days per week in office)

Company

AI-powered advertising technology company transforming ad experiences for brands and their consumers globally.

What you will do

• Own vertical slices of the rendering platform, taking end-to-end responsibility for backend projects and distributed systems.
• Define, design, and own API contracts for internal and external stakeholders.
• Lead technical design decisions, prioritizing high availability, performance, and code quality.
• Mentor the team through constructive code reviews and guidance on complex backend architecture.
• Partner with Product and Infrastructure stakeholders to ensure the engine meets global scale demand.
• Proactively identify performance bottlenecks and resolve roadblocks in production environments.

Requirements

• Minimum of 6 years of experience building robust, complex, and distributed web applications.
• Deep expertise in backend development using Node.js, TypeScript, and PostgreSQL.
• Must be able to work in a hybrid capacity from the Helsinki office 3 days a week.
• English: Excellent communication skills (C1) required.
• Strong analytical skills to translate product requirements into actionable technical tasks.

Nice to have

• DevOps experience with Kubernetes and messaging queues.

Culture & Benefits

• Inclusive environment with a diverse team representing 60+ nationalities.
• Generous healthcare packages and mental health services.
• Equity options and performance-based rewards.
• Hybrid workplace with the option to work abroad for up to 30 days per year.
• Focus on work-life balance with paid holidays and family leave.

Hiring process

• Initial meeting with a Recruiter.
• Interview with the Team Lead.
• Technical interviews covering interactive coding, System Design, and Architecture.
• Final meeting with the VP of Engineering.