Founding Engineer @Referrush · Full Stack Engineer · Open Source Contributor
I design and build production-grade systems with a focus on scalability, reliability, and long-term maintainability.
My work sits at the intersection of product engineering and infrastructure, where developer experience, system performance, and business impact meet.
Currently working across TypeScript, Python, FastAPI, Golang, WebRTC, and cloud-native infrastructure.
Founding Engineer responsible for architecture, product engineering, and infrastructure.
Scope of ownership:
- Designed backend services for referral tracking, attribution, and event pipelines
- Built scalable payouts infrastructure supporting daily reward processing, integrated with third-party APIs
- Implemented frontend architecture for merchant dashboards
- Designed deployment and CI/CD workflows for cloud-native delivery
Technical focus:
- Event-driven backend design for tracking user journeys and conversion flows
- Data modeling for attribution, payouts, and performance analytics
- Performance optimization across API latency and frontend load times
- Security and reliability for multi-tenant SaaS environments
Previously Frontend Engineer at Keyshade, working on UI architecture and developer tooling.
I optimize for:
- Systems that scale with teams, not just traffic
- Codebases that remain readable after years, not months
- APIs that are explicit, predictable, and hard to misuse
- Infrastructure that balances cost, performance, and operational simplicity
I believe strong engineering is about making the right trade-offs visible and not hiding complexity, but managing it deliberately.
- Highly scalable backend systems and modular API design
- Frontend architecture for complex, data-heavy interfaces
- Event-driven and queue-based system design
- Infrastructure automation and cloud-native deployments
Languages
TypeScript, JavaScript, Python, Go, C++
Frontend
React, Next.js, Tailwind, Vite, ShadCN, React Native
Backend & Infrastructure
FastAPI, Node.js, Express, PostgreSQL, MongoDB, Firebase
REST APIs, WebSockets, Queue Systems
Vercel, AWS, GCP
Developer Tooling
Git, GitHub, CI/CD Pipelines, Postman, Bruno, Linux, Cursor
- LinkedIn: https://www.linkedin.com/in/sameerposwal
- GitHub: https://github.com/poswalsameer
- Twitter: https://twitter.com/samposwal
- Resume: https://docs.google.com/document/d/1X5eMOd4Jn4zolTgN-wwA2KxnnPu25FRe
Outside of engineering, I enjoy chess, mechanical keyboards, emulation systems, and solving Rubik’s cubes.
“Good engineers build things. Great engineers build systems that still make sense years later.”