Hi, I'm Mislav Stipetic
I'm a software engineer and consultant with over 15 years of experience building products and leading engineering teams.
I help companies build custom software projects, focusing on startups, delivering new products, and modernizing existing systems.
These days I specialize in Elixir development and practical applications of Large Language Models.
Services
I most enjoy working in the intersection between a product trying to solve a real problem and technology, especially early on in the project. I love building fast and efficient products that go to market quickly, using modern technologies.
MVP Development
My favourite thing to do is scoping out and developing a potentially impactful project from scratch.
The process of incrementally building an MVP and thoroughly testing it with potential customers is always exciting. Given my experience with startups, fundraising, and launching products I'd be happy to get your product from 0 to 1.
Elixir & Phoenix LiveView Development
Building scalable, fault-tolerant applications with Elixir and Phoenix. Specializing in real-time systems and complex, expressive UIs.
With years of experience in Elixir, I've built several production systems including real-time collaborative features and complex business applications.
LLM Integration and Architecture
Implementing AI-powered features using large language models. From chatbots to content generation and data analysis.
I've implemented AI-powered features using OpenAI and other LLM technologies (including Structured Outputs, Tool Use, and Agentic workflows).
Technical Consulting
Providing expert advice on architecture, technology selection, and implementation strategies for your projects.
With the modern development tooling available to all, Software engineers can basically be considered magicians. I'm happy to cut through the noise and help you and your team build an efficient and modular architecture bringing you quickly to market.
Experience
My career spans a diverse range of projects—from data science tooling, ETL pipelines and APIs,to MVP development and running my own startup. Each new project has deepened my understanding of architecture, collaboration and user experience.
I began in backend development at Delivery Hero and Flixbus, working with Python microservices and building systems that scaled to millions of users. This experience with high-scale architecture became essential when I founded Magic Sandbox, a VC-funded startup where I built a Kubernetes-based learning platform and led a team of engineers.
After Magic Sandbox, I've worked as a consultant for various companies—building MVPs, leading teams, ideating and launching new products, designing and implementing cloud infrastructure, and refactoring large-scale applications. This consulting work has exposed me to numerous technologies and business domains, allowing me to develop a versatile approach to problem-solving.
Recently, my focus has shifted to Elixir/Phoenix development and practical AI applications. I've built real-time collaborative systems and implemented AI solutions using large language models, finding the sweet spot between cutting-edge technology and maintainable, production-ready code.
Technical Expertise
- Frontend Development: I work with Phoenix LiveView, JavaScript, Vue.js, and React to create responsive, interactive user interfaces with advanced CSS systems.
- Backend Development: expertise includes Elixir/Phoenix, Python, and Go, with particular strength in database design (PostgreSQL), real-time systems, and scalable microservices architectures.
- AI & LLMs:, I build RAG systems, work with vector databases, and implement multi-agent systems. I have hands-on experience integrating various LLM technologies and developing effective prompt engineering and evaluation solutions.
- Non-technical: my experience encompasses project scoping, wireframing, and technical project management—informed by my time as a startup founder and the full product lifecycle from validation to scaling.
You can download my cv here.
Notable Projects
Reynote
A science-based AI relationship coach powered by an AI swarm. Built to explore advanced LLM usage patterns
View Project →
Magic Sandbox (closed)
An immersive hands-on learning environment for Kubernetes and Cloud-native technologies. It's a VC-funded startup I've been the founder and CTO of, and we've built a lot of great tech
View Project →Have a Project in Mind?
Reach out and let's discuss how we can work together to bring your ideas to life.
Email Me