🐾 🐾 🐾 🐾 🐾

Chinmay Singh

Lead / Senior Full Stack & Platform Engineer

NCR, India
LinkedIn GitHub
15+ years Solo Full Stack Cloud-native Microservices LINE SaaS

TL;DR (Recruiter Snapshot)

Self-taught Lead / Senior Full Stack & Platform Engineer with 15+ years building software and a lifetime around computers (started on DOS at age 2). Currently the solo engineer behind Miraic's entire LINE-integrated SaaS platform, owning everything from backend architecture and frontend development to QA, UAT, and production DevOps for Japanese museums, cinemas, and SMEs. Previously delivered production systems at Sony (eBPF performance tuning), QuickBooks-integrated finance sync (3-month greenfield), and 300-server global CDN infrastructure. Polyglot across TypeScript, Go, Rust, Python, PHP with deep cloud-native expertise (AWS, Kubernetes/K3s, Docker). Built custom monorepo plugin frameworks and shipped open-source developer tools and desktop applications. Security research background with published ethical hacking project and real-world network auditing experience.

Origin Story

Been around computers since I could walk. DOS games on a CRT monitor, sharing save files on floppy disks. In school, I was the kid at the cybercafe helping the owner fix things while secretly queueing torrent downloads (icon-swapped uTorrent, obviously). Started making money online in high school: built a Blogger site (1080hdpicture.blogspot.com) uploading screenshots from IDM-downloaded YouTube videos. It generated significant AdSense revenue. Then built a full WordPress movie site hosted on a VPS, learning PHP, hosting, and traffic monetization along the way.

University was where I went deep into Linux, networking, and security. Deployed Kali Linux, wrote custom shell scripts for WiFi auditing when access was expensive, used GPU cracking (R9 290X) against WPA handshakes. My final year project, "Ethical Hacking (Fully Automated Aircrack-ng)," was essentially productionizing my personal toolkit. Mapped the entire university network: identified every device from CCTV cameras to Cisco switches, documented default credentials and vulnerabilities across 10,000+ endpoints. This research got noticed. There's a YouTube video of the WiFi access being demonstrated on campus.

During college I freelanced on Freelancer.com, but the real money came from a client with multiple WordPress and Blogger sites: I built a JavaScript overlay system that dynamically injected ad clicks based on user interaction patterns, opening monetized tabs in minimized windows. The client later told me he'd earned over $300K from it over two years. It taught me JavaScript deeply and the business side of code.

Professional career started formally in 2016, but honestly, I've been shipping software for money since I was a teenager. I built production systems before AI coding assistants existed — learned debugging the hard way, not by vibing prompts. That foundation is why I can audit AI-generated code instead of being replaced by it.

Current Reality

At Miraic, I work essentially alone. I handle the full stack: backend microservices, frontend SPAs, database design, DevOps pipelines, QA testing, UAT with Japanese clients, and production incident response. There were other developers briefly, but when one relied too heavily on AI-generated code and couldn't deliver, all the work came back to me. I'm comfortable carrying the entire product. I architect systems end-to-end, document everything, and write code that I can debug at 3 AM when something breaks.

I've shipped production systems since before AI coding became mainstream — no vibe coding, no leaning on GPT to think for me. If a role or team wasn't a fit, I moved on. Short stints in my work history aren't gaps; they're evidence that I don't stick around where standards don't match.

Core Strengths

  • End-to-End Ownership: Design → Architecture → Implementation → QA → UAT → DevOps → Production Support
  • System Design: Microservices, monolith consolidation, event-driven, multi-tenant, monorepos (Nx, Turborepo)
  • Performance & Reliability: Async pipelines, messaging (SQS/SNS, BullMQ), caching, observability, eBPF
  • Security & Governance: OAuth, OPA policies, JWT, AES-256-GCM encryption, secrets management, network security, ethical hacking background
  • Developer Enablement: Clean architecture, contract-first APIs, testing strategy, monorepo tooling, code generation pipelines
  • Self-Sufficiency: Operate independently across the full lifecycle; document thoroughly; own production incidents

Technical Skills

Category Technologies & Skills
Languages TypeScript, JavaScript, Go, Rust, Python, PHP, SQL, Bash
Backend & Frameworks Node.js, NestJS, Express, Bun, Axum (Rust), Actix-web, gRPC, REST, GraphQL, Protobuf, ts-rest, ConnectRPC
Frontend Svelte 5 / SvelteKit, React 18/19, Next.js 14/16, Tailwind CSS, shadcn/ui, Ant Design, Chakra UI, Vite
Desktop Wails v2 (Go + React), PyInstaller (Python/Flask), Electron
Cloud & DevOps AWS (Lambda, ECS, EC2, SQS, SNS, S3, RDS), Docker, Kubernetes/K3s, GitHub Actions, GitLab CI, Terraform, AWS CDK, Traefik, Harbor Registry
Infrastructure Windows Server 2022, IIS, RAID, network topology, load balancing, DDoS protection, CDN (300+ servers), ngrok tunneling
Datastores PostgreSQL, MySQL, MongoDB, Redis, DynamoDB, Prisma, Sequelize, TypeORM, SeaORM, BullMQ
Architecture Microservices, monolith, event-driven, serverless, monorepos (Nx, Turborepo, pnpm workspaces), contract-first API, saga pattern, DDD
Security Network penetration testing, WiFi auditing (aircrack-ng suite), GPU-accelerated hash cracking, OAuth, OPA, JWT, AES-256-GCM, Azure Key Vault, HMAC verification
Monitoring Sentry, Prometheus, Winston, Socket.IO, SSE
Integrations LINE Messaging API, LINE LIFF, Stripe, Square Payments, Veritrans, Razorpay, Chatwork API, Google Calendar API, QuickBooks API
Tooling Swagger/OpenAPI, TSOA, Jest, Mocha, Vitest, Playwright, Zod, Biome, ESLint, Prettier, Husky, semantic-release, pm2, AWS CLI
Monetization & Growth AdSense, SEO/SMO, affiliate marketing, WordPress CMS
Soft Skills Independent operator, technical leadership, mentoring, clear communication, agile practices, technical interviewing

Professional Experience

Senior Software Engineer · Miraic.inc

Aug 2023 – Present

Solo engineer carrying the entire product, backend to frontend to QA to UAT to production DevOps. Building multi-service LINE-integrated SaaS platforms for Japanese cultural institutions (Furukawa Museum, Nagoya), cinema chains, and SMEs. I design the architecture, write every layer of code, test it, deploy it, and fix it when it breaks.

Technical Environment
  • Backend: Node.js, TypeScript, Express, NestJS, Bun, Prisma ORM, Sequelize, PostgreSQL, MySQL, Redis
  • Frontend: Svelte 5 / SvelteKit, React 18 (Ant Design), Next.js 14 (Chakra UI)
  • Architecture: Nx monorepo (13 microservices) + Turborepo monorepo (custom feature-plugin framework) + consolidated monolith (TSOA + Inversify DI + 11 PostgreSQL schemas)
  • API Protocols: Contract-first REST (ts-rest), gRPC (ConnectRPC), OpenAPI (TSOA-generated), Protobuf
  • Cloud & DevOps: AWS (S3, SNS, SQS, EC2, ECS, RDS), Docker, Kubernetes/K3s, Traefik, GitHub Actions, GitLab CI, PM2, AWS CDK, Harbor Registry
  • Integrations: LINE Messaging API, LINE LIFF, Stripe, Square Payments, Veritrans, Chatwork API, Google Calendar API
Architecture & Conventions (authored by me)
  • Multi-Platform Strategy: Kakeru (13-microservice Nx monorepo), MonoCentral/Furukawa (Turborepo with custom plugin framework), X-Kakeru-Suite (consolidated monolith with DDD layers)
  • Custom Plugin Framework ("better-feature"): Built feature-plugin architecture with strict client/server/shared separation, auto-generated typed API clients, Sequelize adapters. All 11 feature plugins follow this pattern.
  • Dual API Protocol: Every service exposes ts-rest (REST with Zod validation) and ConnectRPC (gRPC with protobuf) simultaneously
  • Event-Driven Processing: SNS/SQS async workflows, BullMQ job queues (Redis-backed), DLQ retry handling, idempotent webhook processing
  • Payments: Stripe, Square, and Veritrans with idempotent webhook verification. Zero financial discrepancies in production.
  • Deployments: ECS rollouts, PM2 on EC2, K3s Kubernetes with Traefik ingress
Key Achievements
  • Built Kakeru Platform from scratch. 13 microservices handling auth, membership, shifts, payments, LINE messaging, notifications, search, file management.
  • Delivered MonoCentral for Furukawa Museum. Membership, event booking, coupon/campaign engine, Square payments, LINE LIFF integration on K3s Kubernetes.
  • Architected X-Kakeru-Suite. Consolidated monolith with 11 PostgreSQL schemas, TSOA OpenAPI generation, AWS CDK IaC, saga pattern for distributed transactions.
  • Built 8+ ground-up projects solo including LifeOS, multiple school management systems (Rust and NestJS), desktop apps, service management tools, and developer utilities.
  • Handled all QA and UAT for Japanese clients. Directly testing with LINE LIFF apps, verifying payment flows, debugging production issues.

Senior Software Engineer · Magic Factory Tech Pvt Ltd (StreamFT)

Apr 2023 – Jul 2023 (Contract)

Designed & delivered a QuickBooks synchronization platform in 3 months, cutting manual finance reconciliation time by ~60%.

  • AWS-native microservices: Lambda, SQS/SNS async pipelines, Protobuf payload optimization
  • Dual-database: MongoDB (transient staging) + PostgreSQL (system-of-record)
  • OAuth token lifecycle management with refresh/rotation for QuickBooks security compliance
  • 20s polling + delta reconciliation achieving near-real-time sync SLAs
  • Stack: AWS Lambda, SQS, SNS, Node.js, TypeScript, Protobuf, PostgreSQL, MongoDB, OAuth, QuickBooks API

Senior Full Stack Developer · JoulestoWatts (SONY)

Apr 2022 – Feb 2023 (Contract)

Microservices platform with policy enforcement, performance tuning, and secure delivery.

  • OPA authorization policies + Okta identity flows enforcing least-privilege boundaries
  • eBPF performance profiling + Istio routing tuning (reduced latency in critical paths)
  • GitHub Actions CI/CD pipelines (lint, test matrix, security scans, deploy gates)
  • Stack: Node.js, TypeScript, OPA, Istio, eBPF, Azure Key Vault, Jest, MySQL, Docker

Senior Software Engineer · Easy Management Pte Ltd (GajiGesa)

Jan 2022 – Mar 2022

Backend ownership for financial wellness platform.

  • NestJS + PostgreSQL domain APIs (TypeORM, Nx monorepo)
  • CI/CD automation with containerized builds
  • Unit + integration tests (Mocha) raising coverage

Senior Technical Member · Ratna Global Tech (eBay via AWF)

Oct 2021 – Dec 2021

TypeScript microservices powering transactional workflows.

  • Unit test suites (positive/negative paths) improving pre-merge defect catch rate
  • Swagger 3.0 YAML API contracts reducing integration misalignments

Senior Full Stack Developer · Lenergy Mobility

Mar 2019 – Sep 2021

Enterprise Node.js/NestJS platforms with payment integrations.

  • Built and scaled microservices (TypeScript, NestJS, MySQL, TypeORM, Nx packages)
  • Integrated 5 payment gateways, +20% transaction completion uplift
  • Led team: mentoring, code quality standards, API documentation (Swagger)

Linux System Administrator · VHR Solutions (Tata Communications)

Sep 2018 – Mar 2019

Managed 300+ server global CDN infrastructure.

  • Node.js log ingestion and error handling pipelines
  • Load balancer administration and multi-bitrate streaming (Wowza)
  • HTTP header hardening improving security posture

Website Developer · Scholarnex Edutech

Feb 2017 – Sep 2018

Node.js LMS backend development and workflow automation via JS & shell scripting. Scraping-based content ingestion. SEO/SMO.

Website Developer · Infinite Knowledge Digital LLC

Jan 2016 – Feb 2017

Full lifecycle web delivery (HTML/PUG templates, Node API maintenance).

Independent Freelance

2014 – 2016

  • Built ad-tech JavaScript systems (overlay injection, user-interaction-based click routing)
  • WordPress site development, hosting, and SEO monetization
  • Blogger-based content sites with AdSense optimization

Key Ground-Up Projects

LifeOS - Full-Stack Personal Life Management System (2025-2026)

Comprehensive self-hosted life management platform with offline-first PWA, encrypted secrets vault, and multi-tenant spaces. 19 NestJS modules, Svelte 5 frontend, Prisma 7 + PostgreSQL, AES-256-GCM encryption, IndexedDB offline mutation queue.

UAC Command Hub - Service Management Interface (2024)

Web-based service management tool with real-time process monitoring, cross-platform process management, named config profiles, and cyberpunk-themed vanilla JS frontend. Built on Bun + Express + Zod.

School Management Systems (2025-2026)

Three school management projects spanning Rust and NestJS, from NDA-protected production code to SaaS specifications.

  • Rust (Axum + SeaORM + Svelte): Role-based auth with hierarchical permissions. Rust enums for role hierarchy, database migrations with automated seeding. Under NDA.
  • NestJS + Prisma Production Platform: Full K-12 platform (Nursery to Class 12) with attendance, examinations, fee management, timetables, notifications. 19 database models, 13 feature modules, Docker multi-stage builds, Playwright E2E tests.
  • SaaS Specification: Multi-tenant SaaS proposal for Indian schools: Rust/Actix-web, SvelteKit, Razorpay/Paytm, 3-tier hierarchy, Row-Level Security, automated commission splitting.

Custom Enterprise Server Infrastructure (2024-2025)

Windows Server 2022 deployment with 128GB RAM, 6TB NVMe RAID 0, multi-WAN load balancing, IIS multi-domain hosting, DDoS protection, and network segmentation for Indian client.

SORTR - Image Organizer Desktop (2026) - Open Source

Keyboard-driven desktop image sorter (Python/Flask + vanilla JS, PyInstaller packaging). Non-destructive staging, 18 image formats, collision-safe moves, cross-platform standalone binaries. MIT licensed.

StarCat (スターキャット) - Cinema Membership Platform (2024-2025)

LINE-integrated cinema loyalty platform: React 18 + Express + MySQL/Sequelize, multi-tier membership (Red/Green/Blue), automated campaign engine, QR check-in, Veritrans payments, Socket.IO real-time updates.

XK Event Campaign Booking Platform (2024-2025)

LINE-integrated event system with surveys (conditional branching), lotteries, stamp rallies (QR scanning), rich menu templates, BullMQ background workers, 48 Sequelize models.

Express CRUD REST API Generator (2023)

File-based auto-CRUD generator: drop a Mongoose schema, auto-generates 5 REST endpoints + Postman collection. Redis caching, JWT auth, Docker Compose.

QA Engineering Interviewing · Zelevate Platform (2024–Present, Part-Time)

Conduct senior QA engineering interviews on contract: evaluate candidates across Selenium/PyTest automation, Python programming, API testing, and QA process thinking. Built an interactive HTML/JS scoring dashboard with automated report generation. Authored a 9-point internal proposal for improving the hiring pipeline. 16+ interviews completed.

Education

B.Tech. Computer Science · Sharda University

2014 – 2018 · GPA: 6.9

  • Final Year Project: "Ethical Hacking (Fully Automated Aircrack-ng)". Automated WiFi penetration testing suite with WPA/WPS attack automation, GPU-accelerated hash cracking, and deauth-based handshake capture. Demonstrated on university infrastructure (documented security weaknesses were reported).
  • Hands-on network security research: mapped the entire university network (10,000+ endpoints), identified CCTV systems, Cisco switches, biometric devices, printers. All running default credentials. Used Angry IP Scanner, custom shell scripts, and Kali Linux toolchain.
  • Workshops & Certifications: Techkirti'15, CETPA (Android, Robotics), GIZMO

Projects & Selected Highlights

  • Kakeru Platform: LINE-integrated SaaS with 13 microservices, dual REST/gRPC, Nx monorepo
  • MonoCentral (Furukawa Museum): Museum membership platform, custom plugin framework, K3s Kubernetes
  • X-Kakeru-Suite: Consolidated monolith with DDD, 11 PostgreSQL schemas, TSOA, AWS CDK
  • LifeOS: Offline-first PWA with AES-256-GCM vault, 19 NestJS modules
  • SORTR: Keyboard-driven desktop image organizer, PyInstaller cross-platform builds. Open source.
  • School Management Systems: Rust (Axum/SeaORM), NestJS/Prisma/Svelte, SaaS architecture spec
  • Enterprise Server: Windows Server 2022, 128GB RAM, 6TB NVMe RAID, custom load balancing
  • UAC Command Hub: Service management tool with real-time process monitoring
  • StarCat: Cinema loyalty platform with LINE integration, Veritrans payments, QR check-in
  • QuickBooks Sync: Microservice orchestration with Protobuf + OAuth token automation
  • eBPF at SONY: Performance profiling identifying syscall hotspots, reducing service latency
  • Automated Aircrack-ng: University ethical hacking project. WiFi security auditing toolkit
  • Network Security Audit: Mapped 10,000+ university endpoints, documented vulnerabilities

Philosophy

I've been around computers my whole life. Programming isn't about what you know; it's about what you can figure out. I build things that work, document them so others can understand, and take full responsibility when something breaks at 3 AM. No handoffs, no excuses.

No one is born in this world to be alone. — Saul, One Piece

Interests

Learning & Teaching · Emerging Runtimes (Bun, Rust) · Desktop App Development · Distributed Systems · Security Research & Reverse Engineering · Cost Optimization · Open Source · FPS Gaming · Travel · Fitness