Fullstack AI Engineer

Tendium AB; Stockholms kommun; On-site; SEK 550,000 - 700,000; Full time

Job summary

Tendium AB is seeking a full-stack engineer based in Stockholm to work across the tech stack, building AI-driven solutions. You will collaborate with product and design teams to create intuitive user experiences and backend services, with a focus on modern AI technologies.

The role requires strong engineering fundamentals and a passion for integrating AI into product features. Join us to shape the future of procurement data management.

Qualifications

• Strong fundamentals in engineering and ability to work across the tech stack.
• Experience or strong desire to learn agentic workflows or evaluation pipelines.
• Fluent in English and comfortable with ambiguity.

Responsibilities

• Work across the tech stack while collaborating with the team.
• Design and build AI systems from prompt-driven models to complex workflows.
• Own features from discovery to deployment and iteration.

Skills

Full-stack development

AI systems design

TypeScript

React

Python

Node.js

GraphQL

Tools

PostgreSQL

AWS

Microservices

Job description

About Tendium

Tendium is the global pioneer in AI‑driven public tender management, transforming how companies discover, analyse, and win government contracts. Our platform turns complex processes into something simple and transparent, empowering businesses to compete fairly for billions in public sector opportunities. We’ve been building our AI‑native platform since 2018, leveraging a vast data moat, agentic AI, and tens of thousands of hours of R&D. Today we serve large numbers of customers across Europe and are rapidly scaling.

What you’ll do

As a full‑stack engineer you work across the whole stack, building intuitive user experiences as well as backend services and some dev‑ops. You will build state‑of‑the‑art solutions using modern LLMs and agentic technologies, applying them directly to real product challenges. You’ll take ownership from understanding the problem to deploying and refining features that create meaningful value for users.

You’ll collaborate closely with product, design, and engineering to shape what we build. This includes rapid prototyping, exploring current LLM and agentic methods, and turning them into reliable, production‑ready systems, both in backend and frontend. We release early and iterate based on real usage. This role suits someone who enjoys combining strong engineering skills with modern AI methods and who wants to push the boundaries of what our software can do. You will work alongside your teammates, interchangeably between frontend and backend as needed while maintaining a product‑mindset throughout.

You will:

• Work across the tech stack together with your teammates. You are probably more passionate about either frontend or backend but comfortable working in both.
• Deeply understand our users and the challenges of navigating complex procurement data.
• Design, build, and refine AI systems, from prompt‑driven models to multi‑step agent flows.
• Own features end to end: discovery, modelling, evaluation, deployment, and iteration.
• Integrate AI outputs into product features that users trust and rely on.
• Collaborate with product and design to explore what AI should accomplish for procurement teams.
• Balance rapid experimentation with building scalable, maintainable AI systems.

What you’ll bring

• A product mindset and the ability to choose the right approach by understanding the problem first.
• Strong engineering fundamentals, with the ability to work effortlessly across the stack.
• Experience or a strong desire to learn how to design agentic workflows, retrieval‑augmented systems, or evaluation pipelines.
• Comfortable with ambiguity and the ability to turn fuzzy problems into clear, workable solutions.
• Based in Stockholm, within commuting distance from our office in central Stockholm.
• Fluent in English.

Our tech stack

• TypeScript, React, Node.js, Python, GraphQL
• PostgreSQL, Opensearch, Athena
• AWS
• Microservice Architecture: Fargate, Lambda, SQS, EventBridge, GraphQL, OpenAPI
• AI Tooling: Claude Code, Internal MCP Server

Equality and inclusion statement

At Tendium, we don’t just value diversity, we celebrate it. We’re building a workplace where everyone should feel that they belong, where your voice is heard, and your experiences are respected. Different perspectives fuel our creativity and drive innovation, and we’re always looking for people who can bring something new to the team. Whoever you are, wherever you’re from, we’d love to hear from you. Let’s shape the future together.