Training HelloFresh engineers to build production apps with React Native

HelloFresh maintained multiple mobile apps across brands, each built with different tech stacks, including native Android and iOS as well as React Native. This inconsistency led to duplicated effort, slower rollout of shared features, and growing maintenance overhead.

To move toward a unified React Native codebase, they needed teams with different backgrounds, mostly native and web developers, to be able to deliver consistently within the new stack.

We built and delivered a structured 8-week training program combining theory, practice, and 1:1 mentorship. The curriculum covered five modules, from core React Native concepts to native modules and performance, with pre- and post-assessments to track progress.

The training was deeply integrated with HelloFresh’s internal setup:

• Real HelloFresh architecture was used for demos, code reviews, and guided tasks
• Each module included videos, live Q&A, code challenges, and Slack-based async support
• Developers worked toward a final task tied to a real HelloFresh ticket
• All materials were handed over for future cohorts, enabling internal reuse at scale
• 1:1 mentorship supported individual pacing, flexibility, and deeper learning

By the end of the program, all 15 participants had completed the training, improved their technical fluency, and contributed to production-relevant work. Knowledge levels increased nearly 3x across key areas like JavaScript, TypeScript, React Native, and performance optimization.

The training helped HelloFresh reduce onboarding time for future React Native projects, improve codebase familiarity, and increase cross-brand delivery capacity without adding external headcount.