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milon27.

Md Jahidul Islam

Senior Full-Stack Software Engineer

Engineer with 8+ years building and scaling web and mobile products from idea to production. I built a SaaS app to 100K+ downloads and shipped production software for startups and international teams. I enjoy owning problems end to end and turning business needs into simple, reliable software.

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Work experience

Mess Manager (Co-Founder)

messmanager.app · Part-time · Feb 2019 — present

  • Architected and scaled the product solo to 100K+ Play Store downloads, replacing manual paper/Excel accounting with automatic meal tracking, cost-sharing, bill-splitting and PDF reports. (Node.js, Express.js, TypeScript, Drizzle ORM, MySQL; React Native, web and admin in a Yarn monorepo)
  • Optimised API response times to single-digit milliseconds by fixing slow queries through indexing and schema tuning, with production performance tracked in Grafana and Loki.
  • Scaled the backend horizontally by moving sessions into Redis central storage, so it runs across multiple instances as traffic grows.
  • Built real-time mess group chat with Socket.io and Redis Pub/Sub, keeping messages in sync across multiple servers.
  • Tested every feature before release with Vitest and Testcontainers (real MySQL and Redis), shipping through Docker and GitHub Actions CI/CD with live production monitoring.

Pyng.com.au — Senior Software Engineer

Remote (Australia) · Mar 2024 — Aug 2026

  • Led the consumer React Native app on iOS and Android for a live QR payments product, owning architecture, releases and app stability through Firebase Crashlytics and analytics.
  • Hardened the app to payment-grade security with biometric login, Keychain secure storage, OAuth2 PKCE via Keycloak, and screenshot-blocking on sensitive screens.
  • Built the scan-to-pay flow (Vision Camera QR, precise currency handling) with TanStack Query and Zustand, plus NestJS and PostgreSQL backend features, sharing code across apps in a Turborepo monorepo.

TheraMe Today — Frontend Developer

Remote (UK) · Nov 2023 — Feb 2024

  • Built live video therapy sessions using the Agora SDK, connecting therapists and patients for remote appointments, and built the complete web app and admin portal with Next.js and React.

Supertal.IO — Senior Software Engineer

Remote (Singapore) · Oct 2022 — Oct 2023

  • Built auth and user services in a microservices setup for the football club Persib, covering secure login, roles and user management.
  • Delivered backend systems for a US logistics company (NestJS) and an Indonesian news site (Express.js and MySQL), building the APIs that ran their operations.

Independent Contractor — Software Developer

May 2017 — Sep 2022

  • Completed 350+ web and mobile projects for clients worldwide, building with React, Next.js, React Native, Expo, Node.js, Tailwind CSS and WordPress, backed by AWS (EC2, ECS, RDS), MongoDB, Supabase and Prisma.

Education

BSc in Computer Science & Engineering

IUBAT, Bangladesh · Oct 2017 — Sep 2021 · CGPA 3.93 / 4.00