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# Senior Fullstack Developer

- **Company:** Reaktor
- **Location:** Amsterdam, Netherlands (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Data Analysis, Mobile Application Development, Continuous Integration, Software Debugging, DevOps, Programming Tools, Python (Programming Language), Node.Js, Online Service Provider, Service Development Studio, Systems Integration, TypeScript, Web Applications, Cloud Platform System, ReactJS, Backend, Kotlin, Front End Software Development
- **Published:** July 5, 2026
- **Apply:** https://nl.indeed.com/viewjob?jk=7b24c35eec1a89f5

## About the Role

* Strong experience in modern frontend development, for example with TypeScript and React or comparable technologies
 * Strong experience in backend service development, for example 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 how production systems are operated
 * Ability to work directly with clients, stakeholders and other disciplines in a senior, consultative role
 * Strong problem-solving skills and the ability to bring clarity to ambiguous product or technical situations
 * A hands-on mindset - you are technically credible, actively contribute to the work and help the team move forward
 * Fluent verbal and written English skills to collaborate in an international environment

We do not have a hard requirement around years of experience, but we have noticed that this level of fullstack, client-facing and production ownership usually takes several years of professional experience to build.

Nice-to-haves

 * Experience from customer-facing digital products, online services, ecommerce, subscriptions, internal platforms, analytics, content, martech or similar product domains
 * Experience with high-traffic or business-critical production systems
 * Deeper experience with platform engineering, infrastructure-as-code or DevOps practices
 * Experience with customer-facing products, internal tools, integrations, SDKs or developer tooling
 * Familiarity with mobile development

Adaptability

Willingness to work in a hybrid setup. This means balancing office, client premises and remote work depending on the client project and team needs.

## Description

* Building and improving modern web applications, backend services, APIs and data models
 * Working across frontend, backend and infrastructure depending on the needs of the client project
 * Helping clients choose suitable technologies, architecture and delivery approaches
 * Contributing to cloud environments, CI/CD pipelines, deployments and production operations
 * Debugging, testing, monitoring and improving production-grade systems
 * Working on products or tooling related to customer-facing services, internal platforms, identity, martech, customer support, analytics, content, online stores, integrations, developer tooling or SDKs
 * Collaborating directly with client tech teams, business stakeholders, designers, product people and other disciplines
 * Clarifying ambiguous requirements and turning them into working software
 * Taking responsibility for delivery while making sure the team is supported and no one is left behind
 * Using modern development practices, including openness to AI-assisted development tools and workflows


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