Senior Fullstack Developer

• 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

• 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.

Reaktor is a creative technology consultancy for forward-thinking companies. At Reaktor, we design and build tomorrow’s digital products. We are known for our flat hierarchy, have a 5-star Glassdoor rating, and launched a satellite running Node.js in low Earth orbit.

The Amsterdam office has a unique vibe, being a lively mix of 20 nationalities. We hire a personality, not a pair of hands. This has served us well, helping to form a welcoming community of humans who will connect with you beyond the day-to-day.