Reaktor Innovations Oy logo

Senior Fullstack Developer

Job Overview

Location

Amsterdam

Job Type

Full-time

Category

Full-Stack Engineer

Date Posted

July 4, 2026

Full Job Description

đź“‹ Description

  • • Build and improve modern web applications, backend services, APIs, and data models across client projects
  • • Work across frontend, backend, and infrastructure layers based on the evolving needs of client engagements
  • • Advise clients on suitable technologies, architectural approaches, and delivery methodologies for digital products and platforms
  • • Contribute to cloud environments, CI/CD pipelines, deployment processes, and production system operations
  • • Debug, test, monitor, and optimize production-grade systems to ensure reliability and performance
  • • Develop products or tooling related to customer-facing services, internal platforms, identity systems, martech, customer support, analytics, content management, online stores, integrations, or developer SDKs
  • • Collaborate directly with client tech teams, business stakeholders, designers, product managers, and cross-functional disciplines
  • • Clarify ambiguous requirements and translate them into functional, high-quality software solutions
  • • Take ownership of delivery outcomes while ensuring team support and collective success
  • • Apply modern development practices, including the use of AI-assisted tools and workflows where appropriate
  • • Engage in client-facing consulting roles, providing technical leadership and pragmatic decision-making
  • • Operate in a low-hierarchy environment where initiative, curiosity, and hands-on contribution are valued
  • • Adapt to varying client contexts, from focused product teams to large international organizations running high-traffic, business-critical services
  • • Maintain technical credibility by actively contributing to code, architecture, and operational tasks
  • • Communicate effectively in fluent English with international teams and stakeholders
  • • Balance work across office locations, client premises, and remote settings based on project and team requirements

🎯 Requirements

  • • Strong experience in modern frontend development with TypeScript and React or comparable technologies
  • • Strong experience in backend service development with Node.js, Java, Kotlin, Python or comparable technologies
  • • Experience building, shipping, and improving production-grade digital products
  • • Comfortable working across the full delivery lifecycle from implementation to testing, deployment, and production operations
  • • Understanding of cloud environments, CI/CD, deployments, and production system operations
  • • Ability to work directly with clients and stakeholders in a senior, consultative role

🏖️ Benefits

  • • Opportunity to work in a low-hierarchy, collaborative tech community
  • • Exposure to diverse client domains including ecommerce, martech, analytics, and internal platforms
  • • Flexibility to work in a hybrid setup balancing office, client site, and remote work
  • • Engagement with technically mature clients requiring high-level expertise and ownership
  • • Use of modern development practices including AI-assisted tools and workflows
  • • International, English-speaking work environment with global client exposure

Skills & Technologies

Python
JavaScript
TypeScript
Java
Kotlin
Full Stack
Senior
Remote

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About Reaktor Innovations Oy

Reaktor is a technology consulting company that helps businesses transform through digital innovation. They specialize in creating custom software solutions, digital strategies, and user experiences. Their services span across various industries, including retail, finance, and public sector, enabling clients to leverage cutting-edge technologies like AI, cloud computing, and data analytics. Reaktor focuses on building long-term partnerships, delivering tangible business value, and fostering a culture of continuous learning and experimentation. They are known for their agile methodologies and a strong emphasis on talent development, aiming to be a catalyst for their clients' digital evolution and competitive advantage in the modern marketplace.

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