Command Palette

Search for a command to run...

Book a call

Open for challenges.

I build AI-powered products and production-grade web platforms.

Senior Software Engineer at Optum (UnitedHealth Group). 3+ years across full-stack, cloud-native systems and AI agents.

Exploded drawing of siddsingh.dev: design system, web app, and content layers, with products on subdomainspackages/uisiddsingh.devWorkToolsBlogWork3 case studiesTools6 free toolsBlog2 postsWeb appnext@16.4.2Design system18 componentsProducts3 apps, 1 beta
Work
3 case studies
Tools
6 free tools
Blog
2 posts
Web app
next@16.4.2
Design system
18 components
Products
3 apps, 1 beta
Fig. 1.
Siddhant Singh

Siddhant Singh

Building solutions for real problems.

At a glance

3+
Years experience
$500K+
Projected savings / yr
200+
plenz installs
1K
Client monthly visitors

Overview

Senior Software Engineer @ Optum

Gurugram, India

--:--

Freelance work for teams and founders, from a single landing page to a full product.

  • Full-stack web apps

    Production-grade products with Next.js, React, FastAPI and Postgres.

    • Architecture, build and deployment
    • Auth, payments and dashboards
    • Supabase and PostgreSQL backends
  • AI features and agents

    LLM features that do real work, from single prompts to multi-agent workflows.

    • LLM integrations across providers
    • Agentic and multi-agent workflows
    • RAG and context-aware analysis
  • Browser extensions

    Chrome extensions from first prototype to the Web Store.

    • Manifest V3, content scripts and popups
    • Privacy-first, bring-your-own-key designs
    • Chrome Web Store publishing
  • SEO-driven websites

    Fast marketing and content sites built to rank.

    • Server-rendered Next.js
    • Structured data and metadata
    • Analytics and performance tuning
  • Optum

    Senior Software Engineer

    Mar 2026 — now

  • Optum

    Software Engineer

    Sep 2023 — Feb 2026

Open for challenges.

Tell me what you're building, or grab a 15-minute call.

Command Palette

Search for a command to run...