Harshal Sawant

Software Engineer

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About Me.

Hi, I'm Harshal Sawant, a software engineer based in Mumbai, India.

I like building finance systems, HFT-style platforms, algorithm-heavy services, and low-latency distributed systems where reliability is non-negotiable and every millisecond matters.

Experience.

Software Engineer · Freelance

2024 - Present

Remote

  • Designed and shipped backend services in Rust using Actix Web, with a focus on low-latency request handling and reliable production behavior.
  • Built REST APIs and web application backends around HTTP fundamentals, including routing, middleware, authentication, validation, error handling, and API versioning.
  • Worked across PostgreSQL, Redis, Docker, and CI/CD pipelines to deliver maintainable services with strong observability, performance tuning, and long-term support.

Hire Me.

I'm open to software engineering roles and freelance work where I can build reliable backend systems, developer tools, and performance-critical products.

Hire MeResume

Skills & Tools.

GoRustC++PythonJavaSQLNode.jsDjangoPostgreSQLRedisDockerLinuxNix, NixOSGitHub ActionsAPI TestingTypeScriptJavaScriptReactNext.js

Projects.

androidtweaker

Archived

Built and maintained a shell-driven Android optimization toolkit for rooted devices, focused on runtime tuning, repeatable tweak workflows, and easier long-term maintenance.

  • Shell
  • Android
  • Linux
  • Performance Tuning

coretaskoptimizer

Active

Implemented a native C++ root module that applies CPU affinity, scheduler policy, and I/O priority to critical Android system tasks with low-overhead boot-time execution.

  • C++
  • CMake
  • Linux Syscalls
  • Kernel Optimization

Support Me.

If my open-source work, tools, or technical writing helps you, consider supporting me. It helps me keep building and sharing useful developer tools.

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“Believe you can and you're halfway there.”