Active
HaruStream
A multi-provider streaming aggregator — browse trending, top-rated, and popular movies/series pulled from 15+ provider sources, with search and a personal library.
- Next.js
- React
- TypeScript
- Tailwind CSS
- shadcn/ui
Software engineer · Mumbai, India
I build backends that hold up under load.
I'm Harshal. I design and build fast backend services, distributed systems, and developer tools — mostly in Go and Rust, and always close to the Linux parts underneath.
Harshal Sawant
Backend engineer
Building TermChat
- Now
- Building TermChat — real-time chat in the terminal.
- Focus
- Go, Rust, distributed systems, and Linux internals.
- Based
- Mumbai, India · UTC+5:30.
01 — Selected work
Systems I've shipped.
Backend services, developer tools, and low-level experiments — each one built to solve a problem I ran into myself.
Building
TermChat
Real-time group chat in your terminal — a lightweight TCP server broadcasts every message to all connected clients instantly, no accounts required.
- Rust
- Tokio
- Ratatui
02 — Experience
Where I've worked.
OSS Developer · Freelance
CurrentRemote · 2024 - Present
- Built backend services in Rust using Actix Web, focused on fast and reliable requests.
- Built REST APIs and backends, handling routing, auth, validation, and errors.
- Used PostgreSQL, Redis, Docker, and CI/CD to keep services stable and easy to maintain.
Toolkit
Languages
- Go
- Rust
- C++
- TypeScript
- Shell
Systems
- PostgreSQL
- Redis
- Docker
- Linux
- Tokio
- Actix Web
Frontend
- React
- Next.js
- Tailwind CSS
03 — Writing
Notes from the backend.
Long-form write-ups on distributed systems, Linux internals, and the debugging sessions that taught me something.
Distributed Tracing Playbook: Finding the Slow Span in a 3rd-Party Integration
A solution engineer's workflow for using OpenTelemetry traces to localize latency in a chain that crosses your service, a customer VPC, and a vendor API.
Install Linux Without USB: GRUB ISO Boot on Dual Boot
How to install Linux on a dual-boot system without a USB drive by booting an ISO from disk using GRUB.
How to Recover Lost Partitions on Debian-based Systems Using TestDisk
Step-by-step guide to recover lost partitions on Debian, Ubuntu, Linux Mint, and other Debian-based systems with TestDisk.
04 — About
The parts most people ignore.
I'm Harshal Sawant, a backend engineer based in Mumbai, India. I build fast backend services, distributed systems, and developer tools, mostly in Go.
I like the parts most people ignore: how the operating system schedules work, how memory gets used, and what happens to a system when it's under heavy load.
05 — Contact
Let's talk systems.
Have a backend problem, an interesting system, or a project worth building? My inbox is open.