Remote Remote Part-Time - Experienced Haskell Developer

Join our Haskellers team at Stack Builders ! We’re looking for an experienced functional programming engineer to support a long-term project that is almost entirely built in Haskell. This is a staff augmentation role where you’ll contribute to the development and optimization of a mission-critical application with high scalability and data integrity requirements.

Innovation is at the heart of Stack Builders. Our cross-cultural development team pushes the boundaries of functional programming by building applications that consistently exceed expectations, while adhering to best practices in communication, teamwork, and continuous improvement.

We’re seeking a part-time remote contractor (20–30 hours per week) with strong Haskell expertise and the ability to collaborate on database and infrastructure enhancements. This role requires a proactive professional who thrives in fast-paced environments and takes pride in delivering robust, high-quality code.

• Advanced English (spoken and written). You will be directly communicating with the client.
• Must be able to work as an independent contractor . For candidates based in the US, an LLC, S-Corp, or C-Corp structure is required
• 5+ years of professional Haskell experience with outstanding programming skills.
• Strong experience with Yesod and database-related libraries (Persistent, Esqueleto).
• Solid background in writing clean, testable, and scalable code.
• Experience applying property-based testing.
• Strong collaboration and problem-solving skills with excellent verbal and written communication .
• Availability to work 20–30 hours per week and overlap 4 hours with EDT.
• Bonus: Frontend experience with TypeScript/React.

Responsibilities

• Architect and build backend solutions in Haskell (95% of work).
• Implement and optimize database operations (Persistent, Esqueleto).
• Collaborate on infrastructure enhancements to ensure scalability and performance.
• Contribute to code quality practices, including property-based testing (QuickCheck, related libraries).
• Occasionally collaborate on frontend components with TypeScript (e.g., React, jQuery, Bootstrap, Webpack).
• Participate in agile rituals: stand-ups, sprint planning, retrospectives.
• Engage directly with the client during rituals, providing updates, gathering requirements, and ensuring alignment with their needs.

The projected hourly range for this position is from $47.00 to $57.00/ hour, determined by the candidate's interview outcome, skills, experience, education, and alignment with market data.

• 100% remote work modality.
• A human-centered experience, as we’re a people-first company.
• Challenging, exciting and long-term projects. We work with some of the most admired companies worldwide.
• A strong learning culture . You’ll have opportunities for 1:1 sessions with your manager.
• Regular pairing sessions. You’ll develop high-quality code while sharing knowledge with your team members.
• Opportunities for company-sponsored conference participation, OSS contributions, tutorials, blog posts, and technical talks.
• Exceptionally talented and passionate coworkers .
• Timely payments , with the flexibility to choose the payment date modality that best suits your needs. 
• A Stack Builders community to support you and learn with you!