Over a Decade of Haskell Training
2025 marks 10 years since we launched our Haskell training course at Stack Builders!
When we first launched our Haskell course, we set out to make programming in Haskell more accessible, practical, and impactful for our internal team, helping them level up their functional programming skills and bring that expertise into client projects. A decade later, that mission still drives us and shapes the way we build software for our clients.
Training, Growth, and Impact
Over the past decade, our Haskell course has been more than just a training program — it has been a catalyst for growth. We’ve:
- Standardized engineering excellence, giving every new developer a head start in delivering reliable, well-structured code from day one.
- Fostered a culture of learning and mentorship, where senior developers actively share with the next generation of thoughtful and capable engineers.
- Continued to evolve the course alongside real-world Haskell trends, client needs, and our own consulting experiences.
Industry-Relevant, Real-World Haskell Curriculum
Our 10-week Haskell course was born from our years of delivering Haskell development services to clients across various industries. It’s a practical, hands-on program designed to help developers confidently apply Haskell solutions to real-world problems. Here’s what it includes:
- Module 1: Introduction (Getting started and Types and classes)
- Module 2: Functions (Defining functions and Recursive and higher-order functions)
- Module 3: Types and classes and IO
- Module 4: Monads (Functors, Applicatives, and Monads)
- Module 5: Lazy evaluation
We use Programming in Haskell by Graham Hutton to support our course, but we encourage developers to refer to resources, including the following, to supplement Programming in Haskell:
Learn You a Haskell for Great Good! by Miran Lipovača
Get Programming with Haskell by Will Kurt
CIS 194: Introduction to Haskell (Spring 2013) by Brent Yorgey
Learn4Haskell by Kowainik
Shaping How We Code and Think
Our Haskell course provides hands-on mentorship, code reviews, and team collaboration in small groups. Every module includes exercises designed to help developers truly understand the material and apply it directly to industrial Haskell development scenarios.
This training equips our engineers to approach programming problems with clarity and precision. By emphasizing pure functions, immutability, and strong type systems, the course promotes a mindset that enhances code quality in Haskell and beyond.
Our developers often report that the course has reshaped how they write Python, JavaScript, Kotlin, and TypeScript, helping them build more maintainable and robust software across any stack.
Voices from the Stack Builders Team
Here’s what some of our team says about their experience with the Stack Builders Haskell Training Course:
Keyla Munoz - Software Developer Apprentice - 3 months at Stack Builders
“Being part of the Haskell training course has been a really rewarding experience for me. It's helping me grow in my career by deepening my understanding of functional programming and encouraging me to think more critically and precisely about the code I write. The instructors are incredibly knowledgeable and approachable; they’re always willing to explain concepts clearly and answer any questions we have. The content and exercises are well thought out and super helpful for applying what we learn in a hands-on way.
It’s been a great way to build strong foundations and explore a different way of thinking about programming.”
Juan Diego Osorio - Software Developer Intern - 3 months at Stack Builders
“Joining the Haskell course was initially intimidating because I had never heard of the programming language before. Learning something new is always challenging, but the encouragement from the instructors made it easier to handle. From the beginning, the Haskell course has been a valuable asset in my professional development, helping me improve my problem-solving skills and understand a different paradigm that is not typically taught in colleges. It has been a rewarding journey, and I hope this Haskell course can reach more people, enriching their thinking in the same way it did for me.”
Gabriela Andocilla - Software Developer - 8 months at Stack Builders
“The Haskell course has been a great opportunity to explore a new programming language and the concept of functional programming, opening doors to a new programming paradigm. While learning Haskell on your own can present a steep learning curve, having access to people who are passionate about and deeply understand Haskell has been an invaluable opportunity.
Throughout the course, we worked on various exercises, and it was interesting to observe how our approach to these exercises evolved. Over time, we naturally began solving problems in a more functional way. This progression has greatly helped me begin working on actual Haskell projects, providing me with the foundation needed to work with and understand Haskell in a professional context.
In my view, Haskell offers a unique approach to coding, where the type system serves as both a guide for development and a tool for understanding Haskell's own functions. While working with Haskell can be challenging, as it's not an easy language to master, I can confidently say that working with it has been an incredibly rewarding experience.”
Gandhy Garcia - Software Developer - 9 months at Stack Builders
“Before this course, I had no experience with Haskell or functional programming, so it was a complete shift in mindset for me. The clear lessons and group discussions helped me grasp not only the language itself but also the deeper principles of the functional paradigm. More than just learning Haskell, the course improved my overall understanding of programming and made me a better developer.”
Jota Martínez - Software Developer - 9 months at Stack Builders
“As someone who comes from object-oriented programming, learning a purely functional programming language such as Haskell was a challenge. Lucky for me, the course has a good learning curve, great instructors, and more people from Stack Builders who can show you different approaches and solutions for the challenge.
Also, as someone who started working in a project built with Haskell soon after finishing the Haskell course, I can say it was scary, but I was able to hold my ground and push my own boundaries to contribute to it and keep the clients satisfied. Even if I had to do a lot of research myself, I made it that far thanks to the strong foundations that the Haskell course provides for its students.”
David Mazarro - Senior Software Developer - 3.5 years at Stack Builders
“As one of the instructors for our internal Haskell training, I am delighted to have the opportunity to teach about Haskell to all our developers, showcasing what makes Haskell such a uniquely powerful language and empowering them to use it in client projects. Seeing developers gradually go from zero Haskell knowledge to reaching a productive level in the duration of the course is a sight to behold!”
Building a Strong Team & Better Client Outcomes
By grounding every engineer in functional programming, and Haskell in specific, we’ve created a team that shares a deep understanding of software correctness, maintainability, and elegance.
This has a direct impact on the solutions we deliver:
- Cleaner, more reliable code from day one of a project
- Shared mental models across teams, leading to faster onboarding and fewer bugs
- Confidence using Haskell in production, even in high-stakes domains like fintech, data engineering, and cybersecurity
Clients turn to Stack Builders not just for code, but for trusted problem-solvers. Our internal Haskell development training equips our team to think critically, write intentionally, and solve complex challenges with clarity.
Looking to Learn More?
While we don’t currently offer the Haskell course externally, we hope this overview sparks your interest in building similar programs internally or exploring the power of Haskell solutions for your team.
Curious how we can help with your next project? Get in touch with us, we’d love to talk.