Full-Stack Engineer - Stockholm based

Proposales; Stockholms kommun; On-site; SEK 650,000 - 900,000; Full time

Job summary

Proposales is looking for a talented Full-Stack Engineer to join our Product team in Stockholm. You will contribute across the stack, from ideation to deployment, helping build a scalable, serverless platform with Next.js and TypeScript.

You should thrive in a fast moving startup, own what you build, and collaborate closely with a small team and founder. English fluency and a passion for code quality are essential for success in this role.

Qualifications

• 5+ years of full-stack development experience.
• Experience with serverless architectures and performance optimisation.
• Proactive ownership and ability to ship features end-to-end.
• Fluent in English and strong collaboration skills.

Responsibilities

• Write scalable, maintainable, and testable code across the stack.
• Continuously improve performance and user experience.
• Collaborate with founders and product to shape the roadmap.
• Adopt serverless infrastructure and modern frontend/backend frameworks.

Skills

JavaScript

React

Node.js

Next.js

TypeScript

PostgreSQL

Vercel

Vercel AI SDK

MCP

Job description

At Proposales, we're transforming the way businesses create proposals. By replacing static documents with a new online standard, we're redefining how deals are done, turning proposals into interactive, web powered experiences. Think of us as building a piece of internet infrastructure for sales.

Read about our mission: https://mission.proposales.com

We're now 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.

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 judgement 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