Senior Full-Stack Engineer — Client-Facing & Production-Ready

Reaktor

Amsterdam

Hybrid

EUR 70,000 - 110,000

Full time

14 days+

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Job summary

Reaktor in Amsterdam is seeking an experienced Senior Fullstack Developer to join one of our Business Units. You will work across modern web applications, backend services and production systems, collaborating with clients and teams to deliver high-quality software.

The role requires hands-on frontend and backend expertise, strong problem solving, and comfort with a hybrid work setup. You’ll contribute to architecture decisions, CI/CD pipelines and production operations while maintaining a clear

Qualifications

Experience building modern frontend in TypeScript/React.
Backend service development with Node.js, Java, Kotlin or Python.
Experience delivering production-grade software end-to-end.
Comfortable working directly with clients and stakeholders.
Fluent English in an international environment.

Responsibilities

Build and improve modern web applications, APIs and data models.
Work across frontend, backend and infrastructure depending on project needs.
Help clients choose technologies, architecture and delivery approaches.
Contribute to cloud environments, CI/CD pipelines, deployments and production operations.
Debug, test, monitor and improve production systems.
Collaborate directly with client tech teams, business stakeholders and designers.
Clarify ambiguous requirements and turn them into working software.
Take responsibility for delivery while supporting the team.