Senior Full-Stack Engineer for Real-Time Operator UI

NestAi Oy; Helsinki; On-site; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Healthcare (occupational)

Flex benefit

Lunch benefit

Team lunches

Mac/PC choice

Holiday allowance

Phone benefit

Expanding benefits

Job summary

NestAI is seeking a Senior Fullstack Developer in Helsinki to design, build and evolve the operator-facing software at the heart of our platform. You’ll deliver scalable web applications with a focus on reliability, performance and a great user experience.

You’ll work across the full stack—from UI in TypeScript/React to API integrations and system performance—collaborating with engineering teams and field leads to surface real-world feedback into the product.

Qualifications

• 5+ years of professional software engineering on production web apps.
• Strong TypeScript and React experience.
• Experience designing and maintaining APIs.
• Fluency with modern CSS and build tooling.

Responsibilities

• Build operator-facing web applications across the stack.
• Collaborate with Forward Deployed Engineers and field leads.
• Improve performance, reliability and user experience.
• Design scalable API interfaces consumed by other developers.

Skills

5+ years software engineering

TypeScript and React

API design

UI/UX attention

Monorepos

Tools

MapLibre

deck.gl

Cesium

Web Workers

React 19

Job description

NestAI is seeking a Senior Fullstack Developer in Helsinki to design, build and evolve the operator-facing software at the heart of our platform. You’ll deliver scalable web applications with a focus on reliability, performance and a great user experience.

You’ll work across the full stack—from UI in TypeScript/React to API integrations and system performance—collaborating with engineering teams and field leads to surface real-world feedback into the product.