Erwan Joly
Staff Software Engineer
Profile
Engineer from ISEN (French Higher Institute for Electronics and Digital Training), certified MCSA: Web Applications. Strong focus on clean architecture, GraphQL, and delivering high-quality features with simplicity. Track record of driving technical decisions as an early-stage employee and introducing best practices across teams. Open-source lead developer (NosCore, OpenNos). Founder of MarketRacoon, a personal finance SaaS product.
Experience
- As Onwardly's first employee, drove most of the technical decisions on product development.
- Migrated the bootstrap product to GraphQL and React, enabling faster future feature delivery.
- Delivered Trial, Self-Serving Sign Up & Payments, and Organisation Switching end-to-end.
- Established code quality standards and refactored core modules for performance and maintainability.
SaaS product consolidating investment data (stocks, crypto, brokers) into a single personal finance dashboard. Built solo from concept to production.
- On-call team member; main point of contact for security-related matters within the team.
- Mentored junior engineers, improving team velocity and code quality.
- Core member of the payment processing and data querying team, focused on fast delivery.
- Built a generic cursor-paging solution for Entity Framework using expression trees, adopted across the business.
- Drove framework upgrade cycles and shared learnings with other teams.
- Led a high-profile feature from concept to delivery, coordinating across multiple teams.
- Contributed to SMS delivery and reporting features critical to the platform.
- Maintained and improved the core giving and engagement platform.
Open-source MMORPG server emulator written in C#. Led architecture, introduced DAO pattern, CI/CD, and best practices. github.com/NosCoreIO/NosCore
Co-led development of OpenNos, the most widely used Nostale emulator. Established DAO pattern, Entity Framework integration, and CI pipeline. github.com/OpenNos/OpenNos
Full-stack developer on an order management system and a CRM for a French telecom company.