Hearth
A cross-platform companion for organizing the systems, documents, and recurring work that keep a home running.
- React Native
- Expo
- Node.js
- Supabase
- Cloudflare R2
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Software Engineer · Vancouver, Canada
Rajat Mangal
I build backend systems, cloud infrastructure, and developer tools. I start simple and add complexity only when the problem earns it.
I’m most interested in backend systems, distributed systems, and the infrastructure that makes AI systems reliable. I like building software that starts from a real problem, stays understandable, and grows only when the problem needs it.
Thinking aboutBackend Systems
Most Recent Work
View all projectsMyBursar
A privacy-focused workspace for understanding day-to-day finances while retaining control of sensitive financial data.
- React Native
- Expo
- Node.js
- Supabase
- Cloudflare R2
- SQS
View project details Private repository
Latest Writing
View all writingEvaluating AI Agents Beyond ‘Looks Good’
A practical way to replace subjective demos with repeatable evidence about whether an agent behaves as intended.
Read articleWhy I Prefer Simple Architectures First
Complexity is sometimes necessary, but it should arrive with evidence about the problem it is solving and the cost the team is accepting.
Read articleCurrent Focus
- BuildingRebuilding Hearth around clearer domain models, dependable workflows, and a product loop that gets more useful over time.
- LearningSpending more time on distributed-system reliability, failure behaviour, and the boundaries that keep systems understandable.
- ExploringThinking about AI-agent evaluation and how it can become normal engineering infrastructure instead of something teams only use for demos.