404 // Mobile & web apps

404 Crafters, listed here as 404 // Mobile & web apps, is a software studio that builds and improves digital products for clients. Its cross-functional teams follow Extreme Programming practices and work closely with client staff throughout a project.

What 404 // Mobile & web apps offers

• Product development — agile teams that ship new features for web, Android and iOS products, starting with a discovery phase.
• Product modernisation — refactoring, modularisation, decoupling and automated testing to make older software easier to change.
• Embedded teams — engineers who join a client's team to add delivery capacity, with pair programming and mentoring to lift skills.
• Applied AI — AI automations, agents, conversational tools and LLM integrations that connect to existing systems and data.

Who it works with

Named projects include a platform for Latin American edtech firm Digital House that automated onboarding for a developer certification, the agricultural management app Culti, condominium software for PropTech firm Portal Expensas, and Pulsar, a science education platform run by an Argentine government agency. Its portfolio also lists digital wallet apps, Keenvil and EnAcuerdo.

Key facts

• Methods: Extreme Programming, agile delivery, pair programming
• Platforms: web, Android, iOS