Full-Stack Engineer - Stockholm based

Proposales AB; Stockholms kommun; On-site; SEK 558,000 - 781,200; Full time

Job summary

A dynamic technology startup is seeking a Full-Stack Engineer to join their Product team in Stockholm. The role involves writing scalable and maintainable code while optimizing for performance and user experience. Candidates should have over 5 years of experience in JavaScript and modern frameworks, alongside a strong commitment to code quality. The position promises an office-first culture that values collaboration and innovation, providing an opportunity to work with cutting-edge technologies including serverless infrastructure.

Qualifications

• Strong skills in JavaScript and modern frontend/backend frameworks (5 years plus).
• Experience with APIs, product development, and full-stack problem-solving.
• Fluent in English (written and spoken).

Responsibilities

• Write scalable, maintainable, and testable code with a quality-first mindset.
• Continuously iterate and optimize for performance and user experience.
• Help define and grow our engineering culture.

Job description

Overview

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.

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

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 will 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 are great to collaborate with
• You believe in code quality through code reviews, pair programming, test-driven development and code reviews are your default
• 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 eager to learn
• Fluent in English (written and spoken)
• You live in Stockholm and thrive in an office-first team culture