Senior Full-Stack Developer
- Campus Sofia
- Senior
- Expertise: Technology
- Skills: TypeScript, 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
- Employment: Employed
- What you'll do
- Your qualities and skills as Senior Full-Stack Developer
- What’s in it for you
- Get to know iO
- What your colleagues say
- Your application, step by step
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.
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- #LI-Hybrid
What’s in it for you
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.
Get to know iO
- 2,000+colleagues
- 13campuses
- 5countries
- 26nationalities
- 10+awards in the past year
- ∞growing, learning and challenging yourself
What your colleagues say
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.
FAQ
Apply now
Ready for an exciting career at iO? Apply using this form or through LinkedIn. We’ll contact you soon.










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