Full-stack Engineer

Relu

YOUR MISSION Are you passionate about technology with a purpose? Want to make a meaningful impact on people's health? At Relu, we're growing - and we're looking for someone like you. We're looking for a Junior Software Engineering Intern to own our Software/Platform team. You will: * Design AI Agents that can automate the full end-to-end workflow of a dental lab; from order intake, through digital design of dental appliances, to manufacturing (e.g. 3D printing) and delivery * Build and scale our web platform used by thousands of users globally, ensuring it can handle growing user volumes and orders * Develop powerful 3D web tools and viewers, allowing our users to inspect and edit the AI proposals, ranging from CAD editing to end-to-end implant treatment planning. * Think from the user's perspective to turn complex workflows into intuitive experiences * Design and implement slick user interfaces with a focus on user-friendliness and efficiency * Build clean, reusable, and testable software components YOUR PROFILE What you should bring to the team: * Master’s in Computer Science / Engineering (or equivalent experience) * Good understanding of at least one modern programming language (Python, JavaScript, Java, or C++) * Knowledge of software development principles and version control (Git) * An eye for design & UX * Strong problem-solving skills and eagerness to learn in a fast-paced environment * Good communication skills in English The 'Nice-to-haves': * Prior internship or project experience in software development * Familiarity with web technologies (React, Node.js) or cloud platforms (AWS, Azure, GCP) * Interest in AI/ML applications or healthcare technology * Experience with agile development methodologies * Experience in building complex web applications * Experience with TypeScript or 3D web libraries CI/CD or infrastructure know-how How you work: * Collaborative team player who actively seeks feedback and guidance * Proactive and self-motivated with ability to work independently when needed * Curious mindset with willingness to tackle diverse technical challenges * Adaptable and comfortable with ambiguity in a scale-up environment Our Tech Stack = Your Tech Stack * Frontend: Vue.js, React, TypeScript, Three.js, TanStack, Figma * Backend & APIs: Python, FastAPI * Infrastructure & DevOps: Docker, Kubernetes, Terraform Practical Requirements / Eligibility: * Fluent in English (written and spoken) * Valid work authorization in Belgium * Able to work from our Leuven office at least 3 days per week WHY US? * A mission that matters: we're improving dental care and making higher-quality dentistry accessible to everyone, globally * A fast-growing company where your growth goes hand-in-hand with ours — real impact, real ownership, early responsibility and skills in the technologies of the future * The chance to work with the latest AI technologies and industry leaders in dentistry * Fun team culture: after-works, bi-weekly sports, hackathons, retreats

Relu

YOUR MISSION Are you passionate about technology with a purpose? Want to make a meaningful impact on people's health? At Relu, we're growing - and we're looking for someone like you. We're looking for a Software Engineering Intern to own our Software/Platform team. You will: * Design AI Agents that can automate the full end-to-end workflow of a dental lab; from order intake, through digital design of dental appliances, to manufacturing (e.g. 3D printing) and delivery * Build and scale our web platform used by thousands of users globally, ensuring it can handle growing user volumes and orders * Develop powerful 3D web tools and viewers, allowing our users to inspect and edit the AI proposals, ranging from CAD editing to end-to-end implant treatment planning. * Think from the user's perspective to turn complex workflows into intuitive experiences * Design and implement slick user interfaces with a focus on user-friendliness and efficiency * Build clean, reusable, and testable software components YOUR PROFILE What you should bring to the team: * Currently pursuing a Master's degree in Computer Science, Software Engineering, Engineering, or related field * Solid understanding of at least one modern programming language (Python, JavaScript, Java, or C++) * Basic knowledge of software development principles and version control (Git) * Strong UX and design sensibilities * Available for a minimum 6-week internship, ideally longer * Strong problem-solving skills and eagerness to learn in a fast-paced environment * Good communication skills in English The 'Nice-to-haves': * Prior internship or project experience in software development * Familiarity with web technologies (React, Node.js) or cloud platforms (AWS, Azure, GCP) * Interest in AI/ML applications or healthcare technology * Experience with agile development methodologies * Experience in building complex web applications How you work: * Collaborative team player who actively seeks feedback and guidance * Proactive and self-motivated with ability to work independently when needed * Curious mindset with willingness to tackle diverse technical challenges * Adaptable and comfortable with ambiguity in a scale-up environment Our Tech Stack = Your Tech Stack * Frontend: Vue.js, React, TypeScript, Three.js, TanStack, Figma * Backend & APIs: Python, FastAPI * Infrastructure & DevOps: Docker, Kubernetes, Terraform Practical Requirements / Eligibility: * Fluent in English (written and spoken) * Valid work authorization in Belgium * Able to work from our Leuven office at least 3 days per week WHY US? * A mission that matters: we're improving dental care and making higher-quality dentistry accessible to everyone, globally * A fast-growing company where your growth goes hand-in-hand with ours — real impact, real ownership, early responsibility and skills in the technologies of the future * The chance to work with the latest AI technologies and industry leaders in dentistry * Fun team culture: after-works, bi-weekly sports, hackathons, retreats

9fin

About 9fin 9fin is the AI platform powering global debt markets — the world’s largest asset class at over $145 trillion. Debt markets are vast, global, and mission-critical, yet still run on fragmented data, PDFs, and manual workflows. 9fin replaces this broken infrastructure with a single platform that centralises proprietary credit data, deep analysis, and high-value workflows across global markets. Today, 9fin powers teams at 300+ blue-chip institutions worldwide, including global banks, asset managers, private equity firms, law firms, and advisors. The business is scaling at exceptional speed, with rapid expansion in the US and best-in-class retention driven by deep workflow adoption. We’re at a defining inflection point. With proven product-market fit and strong, global market pull, 9fin is accelerating toward becoming the category-defining platform for debt markets worldwide. WHAT YOU’LL WORK ON * As part of a cross-functional team, contribute to projects by helping design systems, building proof of concepts, and delivering new service functionality — including APIs, data processing, and automation — while collaborating closely with Product and Clients. * Development and engineering primarily on backend services and web-application–hosted tools and systems within the 9fin platform. * Play an impactful role within project teams as an individual contributor, participating in code reviews, collaborating with peers, and contributing ideas during research and experimentation with new technologies. * Continually improve the 9fin codebase by taking opportunities to automate, refactor, and document where it’s most valuable. * Work across a diverse set of web platforms, including financial data modelling, access-control business logic, environmental and emissions data capture, integration with ML/AI prediction services, data visualisation, and automation systems. * Collaboration and teamwork: All projects are delivered by cross-functional teams that include domain expertise from 9fin’s financial, legal, and editorial colleagues. You’ll work closely with non-technical stakeholders and help explain technical concepts in a clear, accessible way to support effective team progress. * Developer experience: You’ll work within a strong developer experience setup, including automated preview environments, feature flags, and well-maintained non-production environments, enabling rapid iteration and feedback. Our Backend Stack * Python is the dominant backend language used * Flask & FastAPI * Typing is used within our Python stack to power automated documentation and API definitions * Relational Databases (PostgreSQL) at the heart of majority of services * We have our own internal developer platform with standardised paved road approaches to infrastructure to bring your code into production as quickly as possible. * We’re AWS for Cloud hosted services * Heavy use of AWS lambda Serverless * Docker (AWS ECS) for uniform development/deployment from dev to prod Requirements This role will be a great fit if you: * Have experience working as a Full-Stack or Backend-leaning Engineer within a product team, contributing to system design discussions and delivering production software. * Can plan and reason about software effectively, clearly communicating how your work fits into larger systems and delivers value to clients. * Have hands-on experience designing and implementing data flow through software, from persistent storage to API endpoints, applying industry best practices for validation and reliability. * Have experience with Python and web frameworks (we currently use FastAPI with strong typing and Pydantic). * Have experience building and consuming APIs, ideally within a service-oriented architecture. * Have a working knowledge of SQL for querying and working with relational data. * Are a collaborative and proactive communicator, comfortable working with engineers and non-engineers across the business. * Care about code quality, writing testable and maintainable code, and actively participating in code reviews — both receiving feedback and reviewing others’ work. Benefits We’re a scaling start up and we enjoy sharing our success, when the company succeeds, we always reinvest that in our people. We also offer huge amounts of responsibility, an abundance of opportunity for growth and a platform to truly excel. Financial & Insurance * Competitive Salary (our salary bands are benchmarked at the top end of the market) * Pension (your minimum contributions are 4% with 9fin matching up to 7%) * Private Medical Insurance * Paid sick leave with Income Protection for long periods of illness * Group Life Assurance * Season Ticket Loan & Cycle to Work schemes Time off * 25 holiday days per year * Local public holidays (with the ability to exchange them for alternative days) * Hybrid working model, to allow you the flexibility to decide how, where and when you do your best work * Work abroad for up to 3 months a year * 1 month paid sabbatical after 5 years of service * Enhanced parental leave & flexible working arrangements available Training & Culture * Professional learning and development budget * Quarterly team socials * Summer and Winter company social events 9fin is an equal opportunities employer At 9fin we are dedicated to building and promoting a fair and inclusive workplace where everyone can reach their full potential and truly belong. We recognize that building diverse teams enables a more creative and productive environment. If you’re excited about this role but your experience doesn’t perfectly align with the job description, we encourage you to apply anyway. You might just be who we’re looking for — either for this role, or perhaps another.