Rajeshwar Singh Raj4478

Building resilient backend systems, distributed workflows, and production-grade experiences.

_{Software Development Engineer I · Chandigarh, India 🇮🇳}

01 / About

const rajeshwar: Engineer = {
  role: "Software Development Engineer I @ Bimaplan (YC-backed)",

  focus: [
    "Distributed Systems",
    "Backend Architecture",
    "AWS Infrastructure"
  ],

  current:
    "Building claims automation pipelines integrating 4 insurers at scale",

  stack: [
    "NestJS",
    "TypeScript",
    "PostgreSQL",
    "AWS SQS",
    "Docker"
  ],

  impact: {
    claimProcessingTime: "-65%",
    unhandledErrors: "-90%",
    dbResponseTime: "-55%",
    systemUptime: "99.8%"
  },

  education: "MCA — CGC Jhanjeri, Chandigarh (2025)",
  location: "Chandigarh, India 🇮🇳",

  openTo:
    "SDE-II roles · Full-Stack · Backend · Distributed Systems · Fintech/Insurtech"
};

02 / At a glance

Backend first
Distributed systems · APIs · event-driven architecture

Cloud native
AWS SQS · S3 · Lambda · Docker · CI/CD

Data layer
PostgreSQL · MongoDB · TypeORM · indexing

Product capable
React · Next.js · Tailwind · Redux

Open source
NestJS · Mermaid · Vitest · Cboard

03 / Professional Experience

_{Systems shipped in production. Impact measured in latency, reliability, throughput, and scale.}

◈ Bimaplan · SDE-I

Nov 2025 – Present · Chandigarh
_{YC-Backed Insurtech Platform}

Architected 4-insurer proxy modules — Kotak, Bajaj, ICICI Pru, Tata AIG — with AES-256-CBC encryption & JWT auth
Built event-driven claims document pipeline with OCR extraction → 65% faster processing
Designed AWS SQS FIFO queue with Dead Letter Queue → 90% fewer unhandled errors
Delivered Curebay DHC bulk upload processing 33,624 policy rows across 5 months
Applied TypeORM indexing strategies → 55% reduction in DB response time
Maintained 99.8% uptime on AWS infrastructure

◇ Vosyn · Full-Stack Engineer

Jun 2025 – Nov 2025 · Remote
_{LinkedIn Top Startups Canada #4, 2025}

Built i18n framework with lazy-loading per locale via CDN → 60% faster translation deploys
Engineered custom HTML5 audio player with WebVTT subtitles → 180KB bundle reduction
Achieved 95+ Lighthouse score and 98% mobile usability via code-splitting
Handled 10K+ concurrent WebSocket translation requests at 99.5% uptime
Shipped 15+ features across 3 time zones via GitHub Actions CI/CD

04 / Open Source

_{Small fixes. Real codebases. Merged upstream.}

	Project	Contribution	Pull Request
◉	NestJS	Fixed process-listener leaks from repeated shutdown-hook registrations and added regression coverage.	#17625	MERGED
◉	Mermaid	Split scoped end-to-end tests across two CI shards to prevent Markdown snapshot timeouts.	#8236	MERGED
◉	Vitest	Fixed the agent/minimal reporter to respect explicit `silent` settings while preserving its default behavior.	#11271	MERGED

♿ Cboard AAC Platform

Open Source · WCAG 2.1 · React

Accessibility score 78% → 94% · Serving 10K+ users with speech disabilities · WCAG 2.1 AA-compliant contributions

05 / Technology

_{The tools change. The engineering principles stay.}

LANGUAGES

BACKEND

CLOUD & DEVOPS

DATABASES

FRONTEND

06 / Featured Projects

🏥 Hospital Management System

React · Node.js · MongoDB · JWT

RBAC for admin / doctor / patient roles

API response time

850ms → 320ms

Patient check-in time reduced

40%

📱 Socially — Social Platform

Next.js · TypeScript · Tailwind CSS

Initial page load

1.8s

Core Web Vitals improved

35%

Reached

200+ beta users

07 / Specialized Expertise

┌──────────────────────────────────────────────┬──────────────────────────────────────────────┐
│ AES-256-CBC Encryption & JWT Auth            │ AWS SQS FIFO + Dead Letter Queues           │
│ OCR Integration & Document Processing        │ TypeORM Migrations & Query Optimization     │
│ Event-Driven Architecture (NestJS)           │ Presigned S3 URLs & Document Staging        │
│ Partner API Onboarding & Integration         │ Cron Jobs & Batch Processing Pipelines      │
│ i18n Internationalization (CDN)              │ WebSocket Real-Time Systems                 │
└──────────────────────────────────────────────┴──────────────────────────────────────────────┘

08 / GitHub Analytics

“First, solve the problem. Then, write the code.”

_{Designed like a system: intentional, minimal, and built to scale.}

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