Senior Fullstack Engineer (TypeScript, Node.js, React)

TL;DR

Senior Fullstack Engineer (TypeScript, Node.js, React): Build automation and optimization capabilities for campaign management at scale, with an accent on backend services and frontend applications that power Triggers, Ad Rotation, Smartly Actions, and Action Router. Focus on distributed systems, scalable APIs, and improving system quality through automated testing and monitoring.

Location: Helsinki, Uusimaa, Finland

Company

hirify.global is an AI-powered advertising technology company providing an end-to-end platform for brands and advertisers.

What you will do

• Design, build, and maintain backend services and frontend applications for campaign automation and optimization.
• Drive technical and architectural decisions to improve scalability, reliability, and developer experience.
• Develop and evolve core services including Triggers, Ad Rotation, Smartly Actions, and Action Router.
• Collaborate with product managers, designers, and engineers across teams to deliver customer-focused solutions.
• Own projects from planning through implementation, balancing short-term needs with long-term maintainability.
• Improve system quality via automated testing, monitoring, and continuous improvement of engineering practices.

Requirements

• Strong experience building backend services with TypeScript and Node.js.
• Experience developing modern React applications using TypeScript.
• Solid understanding of distributed systems, APIs, microservice architectures, and cloud-native development.
• Experience writing and maintaining unit, integration, and end-to-end tests (e.g., Jest).
• Ability to independently drive projects from problem definition through delivery.
• Ability and willingness to work from the Helsinki office three days per week.

Culture & Benefits

• Flexible hybrid workplace with office collaboration and remote work.
• Healthcare packages, mental health services, and paid holidays plus family leave.
• Equity options and performance-based rewards, plus career development opportunities.
• Inclusive global culture with trust, transparency, and open feedback.
• Option to work abroad for up to 30 days annually.