Full-Stack Engineer - Stockholm based at Proposales – Stockholm | Jobyssey

At Proposales, we’re transforming how hotels sell and manage Groups, Meetings & Events. We’re building a modern product platform for an industry that still relies heavily on legacy systems and manual processes, helping hotels move from inquiry to booking and delivery through beautifully designed software, automation and AI.

We’re now taking the next step, expanding Proposales beyond proposals into booking, workflows and AI powered operations and we are looking for a talented Full-Stack Engineer to join our Product team. This is your chance to shape the future of a fast growing startup and build a platform with limitless potential. You'll contribute across the stack and play a key role in everything from ideation to deployment. This role is 100% on-site in Stockholm.

If you've worked at a startup before and know what it's like to sit close to a founder, move fast, and take real ownership of what you build, you'll feel right at home here.

Your mission:

Write scalable, maintainable, and testable code with a quality first mindset
Continuously iterate and optimize for performance and user experience
Embrace new technologies as we push into serverless infrastructure
Help define and grow our engineering culture, Proposales should be your favorite place to work
Take initiative and run with ideas, we want people who see something that could be better and just fix it

What we believe in:

We're serverless first, hosted on Vercel with a monorepo built using Next.js and TypeScript. We prioritize long term maintainability over short term speed while also keeping things simple and test driven. Functional programming over OOP. Minimal abstractions. No ORMs. Modular code with shared logic and UI in internal libraries. We use AI where it clearly helps, in product and in internal tooling, and we care about reliability, safe handling of data, and keeping automation and human judgment in the right balance.

Some of the technologies you would be working with:

JavaScript
React
Node.js
Next.js
TypeScript
PostgreSQL
Vercel
Vercel AI SDK
MCP

A bit about you:

Strong skills in JavaScript and modern frontend/backend frameworks (5 years plus)
Experience with APIs, product development, and full-stack problem solving
You've thrived in a fast paced startup environment before, ideally working closely with a founder or small team where you wore a lot of hats
You take initiative and ownership without needing to be asked twice
You are great to collaborate with
You believe in code quality through code reviews, pair programming, and test-driven development as your default, not an afterthought
Willingness to learn new technologies and move between different tech stacks, including AI and LLM based product development
You value collaboration and clarity over rigid processes
You're curious, adaptable, and genuinely energized by figuring things out
Fluent in English (written and spoken)
You live in Stockholm and thrive in an office first team culture

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