
Proposales AB · Stockholm
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 ...
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.
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
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.
Javascript
React
Node.js
Next.js
TypeScript
PostgreSQL
Vercel
Vercel AI SDK
MCP
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
Modulai works with fish, trains, clothes, money, pets, office spaces, sound sensors and much more. If there is data, we do ML (Machine Learning) on it. Our team consists of devoted ML engineers with strong track records from some of Sweden’s most successful startups. We work on project basis and take end-to-end responsibility. We love ML and we think that the best way for us to expand our knowledge is to be exposed to a diversified set of challenging and fun projects. MACHINE LEARNING ENGINEER As a member of the ML-team you will be working with a broad range of problems with one common denominator – ML will be the key ingredient. The projects could be external as well as internal – and in all cases – delivery is central. You will have to analyze the problem at hand, come up with a solution strategy and execute on it. This typically entails gaining an in-depth understanding of the challenge, understanding the available data and then re-formulating it as a ML problem. It requires openness, creativity and an eagerness to learn new methodology and exploring new terrains. We frequently attack these problems as a team, meaning that you will have to be able to clearly explain your reasoning and code in order to engage the rest of us. Our Stack Python / R – standard open-source libraries Scikit-learn and various specialized Python and R ML libraries Large Language Model (LLM) frameworks such as LangChain/LlamaIndex, LangGraph, CrewAI Cloud platforms such as AWS, GCP, and Azure CI/CD: DVC, Github Actions, Sagemaker/VertexAI/AzureML, Relational database management systems MLOps and LLMOps tools for model deployment and monitoring. Software engineering best practices, including testing, version control (Git), and containerization (Docker, Kubernetes) Orchestration: Airflow, AWS Step functions, etc Engineering/LLM/deployment: Kubernetes, docker, terraform Responsibilities Analyzing and planning problems, solutions, and delivery with stakeholder managment, and communication with client Preprocessing, feature engineering, and dataset creation ML and LLM model development, fine-tuning, and evaluation Validation of results and model interpretability Building and optimizing data pipelines and ML/LLM infrastructure Developing APIs and integrating ML models into production systems Ensuring scalability, monitoring, and performance optimization of deployed models Background & Skills MSc or Ph.D. in a quantitative field Excellent understanding of a broad set of ML and deep learning algorithms, including LLMs Strong software development skills in Python and experience with software engineering best practices Experience deploying ML and LLM models into production environments A passion for lean, clean, and maintainable code The desire to grow and to share insights with others Helpful Knowledge Deep learning frameworks and transformer-based architectures LLM fine-tuning, prompt engineering, and retrieval-augmented generation (RAG) Data pipelining and ML/LLM infrastructure best practices DevOps experience, CI/CD, Kubernetes, and serverless architectures Experience with vector databases e.g (Pinecode, redis, and ElasticSearch) for LLM applications About Team Modulai At Modulai we focus 100% on solving problems with machine learning (ML). We work in teams on a project basis. We work for clients, as part of the core team in startups where we have long-time engagement as well for large enterprises transforming ways of working. Learning and teamwork are central to how we work. Everyone in the team is or will soon be a full-stack ML engineer capable of scoping and developing end-to-end ML solutions. You should be able to do end-to-end machine learning products by yourself but actually, never do it because we always work in teams. If there is data, we will do ML on it! Apply here: https://modulai.teamtailor.com/
You know that bit where every company says they’re “changing the world”? Yeah, it can feel a little forced. But we like to think our story actually has some realness to it. Our story begins with Shadi Bitar and Ninos Malki, who came to Sweden from Syria as kids and discovered that books could be a bridge - helping them learn the language, understand the culture, and explore new worlds. A thought emerged, what if everyone could have that? And just like that, Nextory was born - your all-access pass to read, listen, and discover new perspectives without limits. And now, we're on a quest to find a Fullstack Engineer with a frontend fokus. Let us tell you about the role 📖 As a Fullstack Engineer with a Frontend focus at Nextory, you won’t just build interfaces, you’ll shape the moments that matter most in our user journey. Working at the intersection of design, product, and engineering, you’ll bring ideas to life and turn complexity into clarity. Together with backend engineers, you’ll create experiences that are not only smooth and scalable, but genuinely enjoyable to use. Some examples of what you will be doing: Build and maintain user interfaces for payment and subscription flows Create reusable components using Vue and Nuxt Develop features and improvements across the full stack Ensure performance, scalability, and solid UX Support code quality and team development The main character we’re looking for 👀 We believe that you are an experienced Fullstack Engineer, or a frontend-focused developer with a strong interest in the full stack, currently working in a fast-moving environment. You enjoy building user-facing applications and care about creating smooth, reliable experiences for users. We also believe that you have: A relevant educational background in Computer Science or similar Solid experience in Vue.js, Nuxt and Java. Several years of experience building modern web applications A strong understanding of performance, scalability, and system design The Nextory way of working 🏠 At Nextory, we believe a strong and inclusive culture is key to our success - and that culture flourishes when we meet and collaborate in person as much as possible. That’s why we spend the majority of the working time at our beautiful office! We are based in Stockholm, Sweden, with offices in Paris and Bangalore. Our hybrid work policy includes four days in the office and Wednesdays as a work-from-home day. Your next story starts here 💫 We look forward to your application 💫. Applications are reviewed continuously and if you have any questions about the role, please contact erika.thorslund@nextory.com Please note that we do not offer relocation and that a six-month probationary period applies.
You know that bit where every company says they’re “changing the world”? Yeah, it can feel a little forced. But we like to think our story actually has some realness to it. Our story begins with Shadi Bitar and Ninos Malki, who came to Sweden from Syria as kids and discovered that books could be a bridge – helping them learn the language, understand the culture, and explore new worlds. A thought emerged, what if everyone could have that? And just like that, Nextory was born – your all-access pass to read, listen, and discover new perspectives without limits. And now, we’re searching for an Engineering Manager who’s ready to lead the way. Turning ideas into experiences that inspire people to start their reading journey with us. Let us tell you about the role 📚 As an Engineering Manager at Nextory, you’ll lead our Join Team – the talented group shaping the web experience at the very beginning of the customer journey with us. You’ll play a key role in inspiring potential readers to take their first step into the world of Nextory, combining technical leadership with people development to create seamless, engaging and high-performing digital experiences. Your work will include: Managing and empowering a team of five engineers to grow, collaborate, and deliver impact. Ensuring technical excellence and delivery quality in close collaboration with product and design. Driving transparency, collaboration, and innovation across teams. The main character we’re looking for 👀 You have a solid background as a software engineer and several years of experience leading developers in a fast-moving digital environment. You take pride in building teams that consistently deliver results, and have fun doing it. We believe you thrive on creating an environment where people grow, perform at their best and turn great ideas into measurable results. We believe you: Bring experience from full-stack environments, with a true passion for frontend development. Feel confident working with JavaScript and TypeScript with a Java backend. Understand how to build high-performing web applications, CI/CD pipelines and smart SEO practices Have a track record of improving customer onboarding journeys and turning insights into great user experiences. The Nextory way of working 🏠 At Nextory, we believe a strong and inclusive culture is key to our success – and that culture flourishes when we meet and collaborate in person as much as possible. That’s why we spend the majority of the working time at our beautiful office! We are based in Stockholm, Sweden, with offices in Paris and Bangalore. Our hybrid work policy includes four days in the office and Wednesdays as a work-from-home day. Your next story starts here We look forward to your application 💫. Applications are reviewed continuously and if you have any questions about the role, please contact erika.thorslund@nextory.com Please note that we do not offer relocation and that a six-month probationary period applies.