Md. Saniuzzaman Robin / Software Engineer
I'm Robin — a full-stack engineer with 5+ years shipping Next.js, NestJS and Angular systems at scale, with a competitive-programming foundation that keeps the architecture honest.
const engineer = { name: 'Saniuzzaman Robin', role: 'Full-Stack Software Engineer', based: 'Dhaka, Bangladesh', experience: '5+ years', stack: ['Next.js', 'NestJS', 'Angular'], data: ['MongoDB', 'Redis', 'Pub/Sub'], solved: 1700, openToWork: true,};export default engineer;- Years Experience
- 5+
- Req/s at Peak
- 400+
- Prayer Times API
- Problems Solved
- 1,700+
- Codeforces Specialist
- Donation Growth
- 30%
- YoY Business Impact
- Next.js
- Angular
- React
- NestJS
- TypeScript
- REST APIs
- Microservices
- CQRS
- SAGA
- Tailwind CSS
- RxJS
- MongoDB
- Redis
- GCP
- Google Pub/Sub
- WebSockets
01Selected work
A few of the systems I've designed and built — from geolocation microservices to a re-platformed donation engine.
Prayer Times Web
Migrated the Prayer Times engine from Kotlin to a NestJS microservice with all calculation APIs. Integrated MaxMind GeoIP for client IP resolution and Google Maps for place search. Added a cities database for optimized location lookups. The service now handles 400+ req/s at peak for 2.5M daily users, rising to 8M+ during Ramadan. Built the full frontend in Next.js with SEO and i18n support.
- Next.js
- NestJS
- MaxMind GeoIP
- Google Maps API
- Redis
- MongoDB
Giving — Donation Platform
Re-platformed the legacy WordPress Giving engine to a modern Next.js/WooCommerce stack with advanced SEO integration. New design, lightning-fast load times, and structured data drove a 30% YoY increase in donations in 2025–2026.
- Next.js
- WooCommerce
- SEO
- Structured Data
- +1
Qalbox Video Platform
Built the Qalbox streaming experience on MuslimPro: completed the shorts page independently, integrated live streaming, wired up search, and fixed numerous platform bugs. Added OG tags, sitemaps, and the first round of SEO for Qalbox pages.
- Next.js
- Video Streaming
- Live Streaming
- SEO
- +1
Islamic Calendar
Implemented all backend APIs for the Islamic Calendar feature in NestJS and supported frontend integration. Delivers Hijri dates, Islamic events, and festival schedules with proper SEO.
- NestJS
- Next.js
- MongoDB
- SEO
- TypeScript
02Experience
From leading a team on a multi-tenant commerce platform to migrating the Prayer Times service that now handles 400+ req/s at peak.
01/2024 – presentCurrent
Bitsmedia Pte Ltd.
Software Engineer (Full-Stack)
Dhaka, Bangladesh
Develop full-stack features using Next.js/NestJS for platforms serving millions of global users. Architected backend microservices utilizing Redis caching, MongoDB index optimization, and GCP Pub/Sub.
Focus areas
- Scale & Architecture
- Migration & Geolocation
- Business Growth
- Internal Frameworks & Leadership
- Next.js
- NestJS
- Redis
- MongoDB
- GCP Pub/Sub
- TypeScript
- WooCommerce
- SEO
- Microservices
- System Architecture
10/2022 – 01/2024
KONA Software Lab Ltd.
Software Engineer - L02
Dhaka, Bangladesh
Stepped up to lead and manage a 4-member software development team. Managed cross-functional coordination and spearheaded an enterprise-grade multi-tenant e-commerce Admin Panel in Angular.
Focus areas
- Team Leadership
- Core Libraries
- Multi-Tenant Admin Development
- Angular
- TypeScript
- RxJS
- Angular Material
- WebSockets
- RBAC
- Multi-Tenancy
- Team Leadership
- Architecture
03/2021 – 10/2022
SELISE Digital Platforms
Software Engineer
Dhaka, Bangladesh
Acted as the primary driver for frontend development, independently executing 60-70% of all user interface deliverables for high-profile clients, primarily IPEX AG (market leader in Swiss building damage management).
Focus areas
- Core Delivery
- Feature Engineering
- Automation
- Angular
- Angular Material
- TypeScript
- Reactive Forms
- Selenium
- JMeter
- Test Automation
- Performance Testing
03Capabilities
A dual foundation: years of shipping distributed systems, and a competitive-programming habit that sharpens every design decision.
Frontend Architecture
Enterprise SSR & Microfrontends
Production SSR/SSG/ISR with Next.js, multi-tenant Angular enterprise panels, and reactive RxJS/NgRx state pipelines.
- Next.js (App Router)Advanced
- React & TypeScriptAdvanced
- Angular (14-17)Advanced
- RxJS & NgRxExpert
- Tailwind CSSAdvanced
- WebSocketsAdvanced
Distributed Backend
High-Concurrency Microservices
Resilient NestJS microservices, event-driven pipelines, CQRS & SAGA patterns, and high-throughput coordinate resolution.
- NestJS & Node.jsAdvanced
- CQRS & SAGA PatternAdvanced
- REST & WebSockets APIsAdvanced
- Kotlin to NestJS MigrationProduction
- .NET 6 & C#Proficient
- Dependency InjectionAdvanced
Data & Infrastructure
Low-Latency In-Memory Caching
Distributed caching strategies with Redis, MongoDB indexing optimizations, and GCP Pub/Sub message queues.
- Redis Caching (Sliding TTL)Expert
- MongoDB Index OptimizationAdvanced
- GCP Pub/Sub & Cloud RunProficient
- MaxMind GeoIP ResolutionProduction
- Google Maps APIsAdvanced
- Aggregation PipelinesAdvanced
Testing & Reliability
Custom Regression Frameworks
Custom Selenium wrapper frameworks, regression test automation across 6+ platforms, and JMeter load testing under peak loads.
- Selenium Custom FrameworkExpert
- JMeter Load & Stress TestingAdvanced
- Vitest & Jest Unit TestingAdvanced
- CI/CD Automation PipelinesAdvanced
- Cross-Platform AutomationExpert
- Performance ProfilingAdvanced
Algorithms & problem solving
1,700+ problems solved
Codeforces Specialist (Max Rating 1544), active on Codeforces, Codechef, LightOJ, and UVA.
Official Judge & Problem Setter
Authored, tested and judged algorithmic contest problems for university-level competitions.
National Contests
Competed in 10+ national programming contests (incl. ICPC Dhaka Regional & NCPC) for Comilla University.