Senior Full-Stack Developer

  • Location iconLocation icon used in website
    Campus Sofia
  • Level iconLevel icon used in website
    Senior
  • Checkmark iconCheckmark icon used in website
    ExpertiseTechnology
  • Checkmark iconCheckmark icon used in website
    SkillsTypeScript, REST APIs, SQL, mssql, Node.js, Storyblok, Marketo, CI/CD, Front-end Development, Back-end, back-end development, Front-end, DevOps, English, React, Next.js
  • Checkmark iconCheckmark icon used in website
    EmploymentEmployed
We’ll contact you ASAP

What you'll do

You'll join a team working on a complex digital platform that brings together content, search, product information and marketing data into one coherent experience. Think React and Next.js on the front, Node.js and NestJS on the back, with Storyblok, Algolia and a handful of integrations tying it all together.

This is a role for someone who takes ownership without waiting to be told, makes solid technical decisions day-to-day, and knows when to loop in the solution architect for the bigger calls. You'll work alongside frontend, backend and DevOps specialists, and you'll be comfortable holding your own in conversations with the client's product owner and PIM team.

If you like working across the stack, picking up new platforms from documentation, and shaping architecture rather than just executing tickets — keep reading.

Your qualities and skills as Senior Full-Stack Developer

  • Frontend

    • Deep knowledge of React and Next.js

    • TypeScript — not optional, a requirement

    • Strong eye for performance, accessibility and component structure

  • Backend

    • Strong foundation in TypeScript and Node.js

    • Solid understanding of dependency injection, modular architecture and REST API design

    • Experience with SQL — the database in use is MSSQL, but anyone comfortable with SQL in general will get up to speed quickly

    • NestJS experience is a plus, but not a hard requirement — a senior comfortable with TypeScript and Node.js will pick it up from documentation and existing code without issue

  • Platforms & integrations

    • Technical ownership of Storyblok (content models, webhooks, components) and Algolia (indexing, relevance configuration)

    • Prior experience with Bynder, Papirfly, Perfion or Marketo is a plus, but not required — you're used to independently getting to grips with unfamiliar platforms based on documentation and existing code

    • Proven ability to bring together data from multiple sources into a coherent, maintainable architecture

  • Tooling & cloud

    • Practical knowledge of Nx: project structure, targets, affected builds and libs/apps separation

    • Solid understanding of cloud hosting (Azure or similar): knows how applications run in a cloud environment, even if day-to-day operations sit with the client

    • Familiar with CI/CD concepts; the existing pipeline is up and running — you work with it confidently and can independently identify and drive improvements

How you work? 

  • You take ownership without needing to be directed

  • You make day-to-day technical decisions with confidence and competence — knowing when to align on larger architectural decisions with the solution architect

  • You're comfortable working alongside specialists in a broader team (frontend, backend, DevOps)

  • You can hold your own in meetings with client stakeholders — whether that's the product owner, members of the PIM team, or other relevant parties

What we offer?

  • 26 days of vacation days

Based on a 40-hour work week, you have 26 days of paid leave.

  • Additional Health And Dental Insurance

Covering patient and outpatient care, health and dental care, reimbursement of costs for prescribed medicines, pregnancy and birth coverage.

  • Hybrid working

A good work-life balance is super important. Together with your team, you’ll decide when and where you work.

  • Healthy office snacks and specialty coffee

At our campus, we provide fresh fruits, healthy snacks and specialty coffee beverages throughout the day.

  • Personal training budget

Each year, you’ll get a budget of €3,000 to develop yourself, in your profession or as a person, through training, events, or courses.

  • Celebrating together

If there’s something to celebrate, we know how to party! From time to time, the party team at your campus will organise the best (theme) parties.


Sounds like you?

Send me a message or apply directly — I'd love to hear what you're working on and what you're looking for next.

People discussing at a table

What’s in it for you

Vacation iconVacation icon used in website

26 days of vacation days

Based on a 40-hour work week, you have 26 days of paid leave.

SafeEnvironment iconSafe Environment icon used in website

Additional health and dental insurance

Covering patient and outpatient care, health and dental care, reimbursement of costs for prescribed medicines, pregnancy and birth coverage.

HybridWorking iconHybrid Working icon used in website

Hybrid working

A good work-life balance is super important. Together with your team, you’ll decide when and where you work.

FoodBenefits iconFood Benefits icon used in website

Healthy office snacks and specialty coffee

At our campus, we provide fresh fruits, healthy snacks and specialty coffee beverages throughout the day.

TrainingBudget iconTraining Budget icon used in website

Personal training budget

Each year, you’ll get a budget of €3,000 to develop yourself, in your profession or as a person, through training, events, or courses.

Celebrations iconCelebrations icon used in website

Celebrating together

If there’s something to celebrate, we know how to party! From time to time, the party team at your campus will organise the best (theme) parties.

Get to know iO

  • 2,000+
    colleagues
  • 13
    campuses
  • 5
    countries
  • 26
    nationalities
  • 10+
    awards in the past year
  • growing, learning and challenging yourself

What your colleagues say

  • Pop talks, pair programming and even UNO? That's how Maaike leads a team at iO.

    Maaike Hellemans
    Technical Lead Java

  • From SEO expert to content strategist and - today - a copywriter. Experience Pieter's growth story at iO.

    Pieter Moons
    Copywriter

  • Refreshing perspectives mean Ronald learns something new every day.

    Ronald van der Horst
    Lead Software Developer

  • Nakita feels fully supported in her professional development at iO.

    Nakita Verbruggen
    Teamlead Campaigning

  • For Lennard, it’s the fact that iO supports open source that’s an extra dimension to his work.

    Lennard Swaneveld
    Senior Drupal Developer

  • Mariam on the best parts of her jobs. Personal connections, rewarding work and great collaborations.

    Mariam Gooijer - Berrezzouk
    Corporate Recruiter

  • For Marleen, continuous change and evolution are an important part of her iO career.

    Marleen van den Brand
    Designer

  • Marcel’s insatiable curiosity for LEGO leads to eye-opening workshops.

    Marcel de Jong
    Digital Strategist

  • After an inspiring meeting with Klaas, Lars takes a surprising step in his iO career.

    Lars van Tulden
    CRO consultant

  • Patrick and his team set up a team hackathon in search of innovative solutions.

    Patrick de Bie
    Software Developer

Your application, step by step

Working together, making an impact and growing: it all starts with the right connection. That's why we'd like to get to know you and want you to get to know your future colleagues too.

  • Woman listening

    Let's get to know each other

    We like to act quickly. If we can sense a match, we'll get in touch soon for a virtual introduction. This way, both you and we can see if there's a good fit.

  • Woman smiling during meeting

    Come say hi

    How can your knowledge, skills and experience shine at iO? During a conversation with your future team lead, we’ll discuss interesting opportunities for you in our blended agency.

  • People brainstorming at a table with papers

    Meet the team

    There are many people here who’d love to meet you! Your potential colleagues will join us at the table. And of course, you'll get a full campus tour.

  • Woman sitting on a ball

    Join the team!

    Are we all excited? Congratulations! Go ahead and sign that contract. Together, we'll discuss the practical details and ensure you have everything you need to get started at iO.

FAQ

iO is a blended agency. Our experts in strategy, technology, data, content, creation, and marketing work in blended teams to create unforgettable brand and customer experiences together.

For some roles, an assesment or business case is part of the application process. If so, we’ll of course inform you during our virtual introduction.

All teams are part of a specific campus, but you’re more than welcome to work on other campuses too. You can discuss with your team when and where you’d like to work.

The fact that iO is a blended agency offers numerous benefits for your career path. You will learn and grow thanks to the vast diversity and expertise of your colleagues and the challenging collaborations with our clients. Moreover, you can shape your future yourself. With our extensive training opportunities, development paths, and personal attention, everything is in place for a thriving career.

Apply now

Ready for an exciting career at iO? Apply using this form or through LinkedIn. We’ll contact you soon.

Resume

Other relevant documents

Checkmark iconCheckmark icon used in website