Hi, I'm Mubashir Taj.
I build backends that scale.
I build backend systems: APIs, databases, real-time services and the cloud infrastructure they run on. 5+ years of shipping production software with Java Spring Boot, NestJS, Go, PostgreSQL, MongoDB, Docker and AWS, with a strong focus on web security.
Backend work, end to end
From the first schema to production monitoring — the parts of a product that users never see but always feel.
APIs & Backend Services
REST, GraphQL and real-time APIs in Java Spring Boot, NestJS and Go with clean modules, validation, auth and tests.
Database Design
PostgreSQL, MySQL, MongoDB and Redis schemas, indexes, partitioning and query tuning that hold up under load.
Real-Time Systems
WebSockets, WebRTC, Kafka and RabbitMQ for chat, streaming, live dashboards and event pipelines.
Cloud Computing
AWS, Google Cloud and DigitalOcean: architecture, deployment, autoscaling and sensible costs.
Server Management & DevOps
Linux servers, Docker, Kubernetes, Nginx and CI/CD pipelines with monitoring and zero-downtime deploys.
Web Security
OWASP Top 10 hardening, OAuth2 / JWT auth, rate limiting, TLS and secure server configuration.
Projects I have built
A few systems I designed and shipped. Each links to a write-up of how it works.
AI-Powered Compliance LMS
TDLR-approved defensive driving platform with AI face verification, automated proctoring and secure certification logic.
Logistics & Port Clearance ERP
Multi-tenant enterprise system with database partitioning and automated job tracking for large-scale port operations.
Real-Time Systems
Low-latency systems from P2P WebRTC streaming to live trading dashboards.
Full-Scale SaaS Engineering
End-to-end SaaS products: multi-tenant architecture, integrated billing and cloud deployment.
Backend, cloud & security stack
Java Spring Boot, NestJS and Go on the server, every major database, cloud and DevOps tooling, and security built in from day one.
Backend Frameworks
Production APIs and services in three ecosystems.
- Spring Boot
- Spring Security
- Hibernate / JPA
- NestJS
- Node.js
- Express
- Go (Gin)
- GraphQL
- Microservices
Languages
Strongly typed, compiled and scripting languages.
- Java
- Go
- TypeScript
- JavaScript
- SQL
- Bash
Databases
Schema design, indexing, partitioning, replication and tuning.
- PostgreSQL
- MySQL
- MariaDB
- MongoDB
- Redis
- Elasticsearch
- SQLite
- Prisma
- TypeORM
Cloud Computing
Designing, deploying and scaling on the major clouds.
- AWS
- Google Cloud
- DigitalOcean
- Cloudflare
- Firebase
- Vercel
Server Management & DevOps
Linux servers, containers, pipelines and observability.
- Docker
- Kubernetes
- Linux
- Ubuntu Server
- Nginx
- PM2
- Terraform
- GitHub Actions
- Jenkins
- Prometheus
- Grafana
Web Security
Hardening apps and servers against real-world attacks.
- OWASP Top 10
- OAuth2 / OIDC
- JWT
- Auth0
- SSL / TLS
- Rate limiting
- Secure headers & CSP
- Penetration testing
Messaging & Real-Time
Event-driven systems and low-latency communication.
- Apache Kafka
- RabbitMQ
- Socket.io
- WebSockets
- WebRTC
Frontend
Fast, SEO-friendly interfaces when a product needs one.
- React
- Next.js
- Tailwind CSS
From the blog
Practical write-ups on backend engineering, system design and the tools I use.
DevelopmentPostgreSQL EXPLAIN ANALYZE: Read Query Plans Correctly
Most developers run EXPLAIN ANALYZE once, panic at the wall of text, and go back to guessing. This guide teaches you to read PostgreSQL query plans properly: which scan to look for, why nested loops explode at 2am, and the timing traps that mislead you.
Microservices ArchitectureMicroservices Architecture: A Complete Guide to Building Scalable Applications
Microservices architecture breaks apps into independent services communicating via APIs. Each handles a specific business capability to deploy and scale independently. Learn how they work, their benefits (scalability, flexibility), challenges (data consistency), and distributed system best practices
SaaS Product EngineeringEnd-to-End SaaS Engineering Scaling Ideas to Production
From multi-tenant architectures to integrated billing systems, I build full-scale SaaS products that solve real-world problems. Secure, scalable, and built with a modern tech stack.
SaaS & Enterprise SystemsScalable Logistics & Custom Port Clearance ERP
A high-performance multi-tenant ERP designed for port clearance and logistics. Engineered with NestJS and React, featuring database partitioning and tenant-isolated data for global scalability.
Enterprise EdTech SolutionsCompliance-Ready LMS AI-Powered Defensive Driving Platform
A high-security, TDLR-approved LMS built for US Defensive Driving. Featuring AI face detection, real-time monitoring, and automated compliance workflows to ensure 100% student integrity.
Real-time SystemsMastering the Real-Time Web: Scalable WebSockets & WebRTC Solutions
5+ years of expertise in building low-latency, high-concurrency applications. From live trading floors to P2P video streaming, see how I architect real-time experiences that never lag.
DevelopmentGit Workflows Every Developer Should Know in 2026
Git is the one tool every developer uses every single day — yet most people only know the basics. Here are the workflows, commands, and habits that will make you faster, safer, and more collaborative in 2026.
Need a backend that scales?
APIs, databases, real-time features or a cloud setup — tell me what you are building and I will reply within 24 hours.