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Senior Full Stack Software Engineer (f/m/d) - React, Node.js

Roles & Responsibilities

  • A technical degree in Computer Science, Software Engineering, or a related field
  • 5+ years of hands-on experience in full-stack JavaScript development
  • Deep knowledge of Node.js (Express, Koa or Fastify), TypeScript, React, and modern web architectures; solid understanding of relational databases and REST API development (GraphQL is a plus)
  • Strong code quality with hands-on experience in testing, including frameworks such as Jest, Vitest, or Node's built-in testing framework; automated tests are standard

Requirements:

  • Build and maintain modern React frontends and Node.js APIs with TypeScript
  • Design and implement REST or GraphQL APIs that scale efficiently
  • Collaborate closely with backend engineers, designers, and product owners to translate requirements into elegant solutions
  • Write clean, maintainable, and well-tested code with automated tests; mentor junior developers and contribute to architecture decisions and best practices

Job description

Location: Hamburg, Berlin, Gütersloh or Remote (ideally max. 3 hours travel time to Berlin)

Hey Full-Stack Enthusiast 👋 

We’re smartclip – the tech company behind Europe’s leading TV and video advertising platform. 

Our mission? To empower European broadcasters with innovative, scalable, and privacy-first technology — and to keep the internet open. 

If you’re passionate about writing clean, efficient code, mentoring others, and shaping great software from design to delivery — you might be the person we’re looking for.

What you’ll do

You’ll join our UI Engineering team and take ownership of full-stack projects that power our adtech ecosystem.
This isn’t just about coding — it’s about collaboration, technical ownership, and making an impact.

Here’s what your day might look like:

  • Build and maintain modern React frontends and Node.js APIs with TypeScript.

  • Design and implement REST or GraphQL APIs that scale efficiently.

  • Collaborate closely with backend engineers, designers, and product owners to translate requirements into elegant solutions.

  • Write clean, maintainable, and well-tested code — with automated tests as a natural part of your workflow.

  • Help break down complex requirements into manageable tasks and guide junior developers through them.

  • Contribute to architecture decisions and best practices — we value opinions backed by experience.

What you bring 

  • technical degree in Computer Science, Software Engineering, or a related field.

  • 5+ years of hands-on experience in full-stack JavaScript development.

  • Deep knowledge of Node.js (framework e.g. Koa, Express or Fastify), TypeScript, React and modern web architectures.

  • Solid understanding of relational databases (e.g. MySQL, MariaDB, PostgreSQL or SQL Server), including database design, SQL querying, and REST API development (GraphQL is a plus).

  • A strong sense of code quality with mandatory hands-on experience in testing, including frameworks such as e. g. Jest, Vitest, or Node’s built-in testing framework – Clean design and automated tests are not optional.

  • Bonus points for experience with: AWS, Jenkins, Grafana, Graylog, Confluence, Jira, Shell scripting 

Why you’ll love working with us

We’re a team of curious, collaborative engineers who value ownership, creativity, and clean architecture over buzzwords.

At smartclip, you’ll find:

  • Tech freedom – work with cutting-edge tools (React, Node.js, TypeScript, AWS, Kubernetes, and more).

  • Top equipment: choose your setup – Mac, Linux or custom tools

  • Remote-first flexibility – work wherever you’re most productive, no micromanagement.

  • Continuous learning: Udacity, Coursera, hackathons, conferences & coaching

  • Perks that matter – Deutschland-Ticket, JobRad, Urban Sports Club, RTL+ Premium, and fun company events.

Come join our motivated team — a bunch of people who love tech, data, and great products as much as you do!

smartclip is committed to creating a diverse and inclusive environment. All qualified applicants will receive consideration for employment without regard to race, ethnicity, nationality, age, gender, gender identity, religion, sexual orientation, disability, or any other diverse characteristics.

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