Interim Full stack backend developer

2 weken geleden


Rotterdam, Zuid-Holland, Nederland KPN Voltijd € 70.000 - € 90.000 per jaar
Company Description

You'll join an international team of 13 professionals — front-end and backend developers, API experts, and cloud engineers — all dedicated to making KPN's developer experience seamless and powerful.

We collaborate closely, using Agile/Scrum principles and working two days a week from our Rotterdam office. Autonomy, trust, humor, and shared responsibility define our way of working.

We take pride in solving complex challenges while keeping the atmosphere open and supportive.

Job Description

As a Software Engineer in the Developer Portal team, you'll help shape the backbone of KPN's developer experience. You'll design, build, and maintain reliable, high-performing backend services and APIs that connect KPN's internal and external ecosystems — from customers and suppliers to partners and developers. You'll work in a modern cloud-native environment with .NET and Python, using event-driven and microservices architectures to deliver scalable and secure solutions.

You take ownership from design to deployment, value clean code and automation, and enjoy contributing to both the architecture and culture of your team.

Qualifications

We're looking for a passionate engineer with a strong technical foundation and a collaborative mindset.

You bring:

  • 5+ years of professional software development experience

  • Solid understanding of OOP, clean code, and design principles (SOLID)

  • Experience with microservices and event-driven architectures

  • Hands-on skills with CI/CD, Docker, and Infrastructure as Code (IaC)

  • Familiarity with REST APIs, OpenAPI/Swagger, and OAuth2

Nice-to-have experience with AWS, Python/Django, or .NET Core? Even better.

Additional Information

Apply before: November 19th 17:00

Starting date: december 1st 2025

Contract untill: june 1st 2026

Hours per week: 36 

Rate: maximum €89,00 (including travel expenses, excl BTW)

Wil je meer weten? Neem contact op met onze recruiter Antoine van der Maas via 06 – of [email protected].


  • Medior Full-Stack Developer

    2 weken geleden


    Rotterdam, Zuid-Holland, Nederland Eco Software Solutions B.V. Voltijd € 50.000 - € 65.000 per jaar

    About the jobTitle: Medior Full-Stack Developer (React / Node / TypeScript)Location: Rotterdam, Netherlands (hybrid – 3–4 days/week in the office)Seniority: ~3–6 years full-stack experienceSalary range: €50,000 – €65,000 per year (depending on experience)Company DescriptionEco Software Solutions is a leading technology company dedicated to...


  • Rotterdam, Zuid-Holland, Nederland KPN Voltijd € 70.000 - € 90.000 per jaar

    Company DescriptionYou'll join an international team of 13 professionals — front-end and backend developers, API experts, and cloud engineers — all dedicated to making KPN's developer experience seamless and powerful.We collaborate closely, using Agile/Scrum principles and working two days a week from our Rotterdam office. Autonomy, trust, humor, and...

  • Full-Stack Developer

    2 weken geleden


    Rotterdam, Zuid-Holland, Nederland DPDK Voltijd

    Full-stack DeveloperDescriptionDPDK is looking for a full-stack developer that manages and oversees the structure of DPDK's overall codebase.Your standard way of working revolves around using modern web standards with a focus on performance, SEO, accessibility, usability, and security. In close collaboration with Technology and DevOps teams, you will be...

  • Full stack-ontwikkelaar

    5 dagen geleden


    Rotterdam, Zuid-Holland, Nederland Elevation Group Voltijd

    Wil jij werken bij een organisatie die innovatieve software ontwikkelt om bedrijven te helpen hun processen te verbeteren, en waarbij jouw werk echt impact heeft op de manier waarop organisaties omgaan met belangrijke data?Over de functieAls Full-Stack developer werk je aan de front- en backend van een SaaS-platform dat bedrijven ondersteunt bij...

  • Full Stack Engineer

    22 uur geleden


    Rotterdam, Zuid-Holland, Nederland UPFRONT Voltijd

    Als Full-Stack Developer ben jij degene die zowel de frontend als backend van onze digitale omgeving naar het hoogst mogelijke niveau tilt. Je begrijpt dat elke beslissing impact heeft op onze gebruikers, op het succes van onze applicaties en op de groei van Upfront.Je krijgt energie van het vertalen van UI/UX-designs naar een gebruiksvriendelijke,...

  • Full Stack Developer

    7 dagen geleden


    Rotterdam, Zuid-Holland, Nederland Portbase Voltijd

    Description of your professional missionAs a developer within the Bezoek Schip team, you will design, build, test, and deliver software that enables the seamless coordination of vessel calls in Dutch ports. Our digital services connect shipping agents, terminals, and port authorities, ensuring that all critical information flows securely and efficiently.You...

  • Full Stack AI Developer

    1 week geleden


    Rotterdam, Zuid-Holland, Nederland Bonsai Software Voltijd € 55.000 - € 100.000 per jaar

    Full Stack / AI-Application DeveloperBonsai Software | Rotterdam | Parttime of FulltimeOver Bonsai SoftwareBonsai Software heeft zich in korte tijd ontwikkeld tot een serieuze speler in de softwaremarkt.Waar we ooit begonnen als kleine startup, zijn we inmiddels uitgegroeid tot een toonaangevende partner voor complexe digitale vraagstukken.Met meer dan 50...

  • Backend Developer

    7 dagen geleden


    Rotterdam, Zuid-Holland, Nederland Independent Recruiters Voltijd

    Are you a passionate backend developer looking for an opportunity to make an impact in a collaborative environment? Join our dynamic Developer Portal team, where you will play a vital role in shaping the delivery of innovative developer products. You will be part of an agile and diverse team that values autonomy, fosters a culture of trust and humor, and is...


  • Rotterdam, Zuid-Holland, Nederland Portbase Voltijd

    Description Of Your Professional MissionAs a developer within the Bezoek Schip team, you will design, build, test, and deliver software that enables the seamless coordination of vessel calls in Dutch ports. Our digital services connect shipping agents, terminals, and port authorities, ensuring that all critical information flows securely and efficiently.You...

  • Backend Developer

    3 dagen geleden


    Rotterdam, Zuid-Holland, Nederland Digital Impact B.V. Voltijd

    Wij zijn Digital ImpactDigital Impact is een tech consultant en digital agency gevestigd in hartje Rotterdam. Wij begeleiden onze klanten in het vertalen van bedrijfsstrategie naar digitale strategie en helpen ze bij het aanbrengen van structuur in hun digitaliseringsambities. Vanuit dat vertrekpunt ontwikkelen we doorlopend aan digitale producten, digitale...