Sr. Software Engineer • Available for Opportunities

Apurbo Kumar

Architecting production-grade systems with PHP, Laravel, NestJS, PostgreSQL & MySQL — building robust REST & GraphQL APIs for travel booking, B2B portals, IoT telemetry, fintech engines, and cross-platform React Native mobile apps.

Panthapath, DhakaB.Sc. CSE (DIU)5+ Yrs Exp

Explore Work (16 Systems) →Get In Touch

~/apurbo-portfolio/src

export const systemTopology = {
  engineer: "Apurbo Kumar",
  title: "Sr. Software Engineer",
  microservices: [
    { service: "TripFindy Gateway", type: "B2C Travel", tech: "NestJS + PostgreSQL + Redis" },
    { service: "TicketLagbe Portal", type: "B2B Corporate", tech: "PHP / Laravel + GraphQL + MySQL" },
    { service: "Live Streaming Platform", type: "Video & Media", tech: "Video SDK + Socket.io + AWS S3" },
    { service: "BRTC Fleet Telemetry", type: "IoT & Transit", tech: "Node.js + WebSockets" },
    { service: "Goti Pay Engine", type: "Fintech Payment", tech: "NestJS + PostgreSQL" },
  ],
  b2c_platforms: ["TripFindy B2C", "HotelLagbe Engine", "SimWindy eSIM"],
  b2b_platforms: ["TicketLagbe B2B", "AIS-TRAX Enterprise"],
  cloud_infrastructure: ["AWS S3", "AWS EC2", "CloudFront"],
  media_streaming: ["Video SDK", "Socket.io"],
  status: "Production Active ✔"
};

B2B • B2C • AWS • Video SDK • Laravel • NestJS • PostgreSQL • MySQLApurbo Kumar • Sr. Engineer

Production Systems

Years Experience

Technologies

Key Industries

Client Success Rate

Core Capabilities

Services & Engineering Focus

E-commerce & Booking Systems

End-to-end booking & store engines with search inventory, real-time availability, checkout, and payment gateways.

Next.jsNestJSPostgreSQLRTK Query

Travel & B2B/B2C Platforms

B2C flight/hotel search engines and B2B agent corporate portals with sub-agent deposit & ticketing management.

PHPLaravelGraphQLNestJSGDS APIs

Fintech & Payment Integration

High-security transaction routing, merchant settlement ledgers, payment webhooks, and idempotent processing.

NestJSNode.jsPostgreSQLSSLCommerz

IoT & Fleet Telemetry Systems

Bus Rapid Transit (BRT) vehicle tracking, geofence boundary alerts, and real-time GPS telemetry streams.

Node.jsWebSocketsReact.jsPostgreSQL

Cross-Platform Mobile Apps

60fps iOS and Android mobile apps with offline caching, push notifications, and live WebSocket streaming.

React NativeTypeScriptRedux ToolkitiOS/Android

Real-Time Microservices

Event-driven backend services with Redis caching, Socket.IO messaging, and microservice API gateways.

NestJSLaravelRedisAWS S3

Production Work

Featured Production Projects

16 real-world systems deployed and scaled across B2C travel, B2B corporate platforms, fleet telemetry, fintech engines, and cross-platform mobile apps.

Travel / BookingProduction Active

TripFindy (B2C Travel Agency)

A next-generation travel technology ecosystem redefining global travel experiences through intelligent flight aggregation, dynamic pricing, hotel integrations, and seamless booking journeys powered by automation and user-centric design.

Next.jsReact.jsTypeScriptNode.js+4

Case Study→Live System

Travel / B2BProduction Active

Ticket Lagbe (B2B Travel Agency)

A high-performance digital ticketing marketplace engineered for speed, scalability, and reliability, enabling users to book transportation, events, and entertainment services with secure transactions, real-time availability, and instant confirmations.

Next.jsReact.jsTypeScriptNestJS+5

Case Study→Live System

Social / Mobile AppProduction Active

Hello Superstars (Web + Mobile App)

A fan-celebrity interaction mobile & web platform featuring live streaming, instant chat messaging, media upload, and store releases.

React NativeReact.jsJavaScriptLaravel+3

Case Study→Live System

Enterprise / FleetProduction Deployed

BRTC Vehicle Management System

Comprehensive vehicle control, real-time fleet monitoring, BRT corridor integration, and automated performance reporting.

React.jsTypeScriptNode.jsNestJS+2

Case Study→Live System

Enterprise / RecruitmentProduction Active

AIS-TRAX Management Portal

An AI-powered audit and compliance automation platform enabling organizations to achieve global standards, mitigate risks, and enhance governance through real-time monitoring, intelligent reporting, and scalable cloud-based workflows.

React.jsRTK QueryMUINode.js+3

Case Study→Live System

Government / RecruitmentProduction Deployed (Live)

eMGS (Migration Governance Eco-System)

A migration governance and overseas recruitment system managing applicant verification and deployment workflows.

LaravelPHPMySQLjQuery+2

Case Study→Live System

Healthcare / TravelProduction Deployed (Live)

VISA COVID (Web + Mobile App)

A trusted global visa facilitation platform offering end-to-end consultancy, document intelligence, and streamlined processing workflows to ensure efficient, transparent, and hassle-free international travel compliance.

React NativeLaravelPHPMySQL+2

Case Study→Live System

Travel / BookingProduction Deployed (Live)

HotelLagbe (Hotel Reservation Engine)

A comprehensive hotel booking platform delivering curated accommodation experiences through smart search, competitive pricing, and seamless reservation management, designed to simplify both leisure and business travel planning.

Next.jsReact.jsTypeScriptNode.js+2

Case Study→Live System

Fintech / PaymentProduction Deployed (Live)

Goti Pay (Fintech Payment Engine)

A robust fintech infrastructure platform delivering secure, scalable, and high-performance digital payment solutions, including merchant services, transaction processing, and financial integrations for modern digital economies.

NestJSNode.jsTypeScriptReact.js+2

Case Study→Live System

Telecom / MessagingProduction Active (Live)

Goti SMS (Intelligent SMS Gateway)

A smart, modern SMS gateway for Masking & Non-Masking SMS, OTP, and notifications. Global reach, 99.9% delivery rate, powerful APIs, and real-time reporting.

Node.jsNestJSLaravelPHP+4

Case Study→Live System

Telecom / Travel TechProduction Deployed (Live)

SimWindy (eSIM Global Roaming)

A global connectivity enabler providing next-gen eSIM and roaming solutions with instant activation, competitive data plans, and seamless cross-border mobile connectivity for international travelers and digital nomads.

Next.jsReact.jsTypeScriptNode.js+2

Case Study→Live System

Media / PublishingProduction Active (Live)

BD24Report (Digital News Platform)

A high-traffic digital news portal delivering real-time news coverage, editorial publishing tools, and instant content delivery.

LaravelPHPMySQLJavaScript+2

Case Study→Live System

Healthcare / DistributionProduction Deployed (Live)

JemeX Pharma (Healthcare Portal)

Leading importer and distributor of premium healthcare products. Supplying 100% authentic medicines for retail and wholesale globally. Committed to quality, reliability, and customer satisfaction in the pharmaceutical industry.

LaravelPHPMySQLHTML5/CSS3+1

Case Study→Live System

IoT / Mobile AppProduction Active (Live)

Safety GPS Mobile (Vehicle Tracking App)

Cross-platform React Native vehicle tracking app featuring live map navigation, geofence alerts, and engine telemetry metrics.

React NativeTypeScriptRedux ToolkitWebSockets+3

Case Study→Live System

Travel / Mobile AppProduction Active

TripFindy Mobile (Travel Booking App)

A comprehensive React Native mobile travel companion for searching hotels, booking flight deals, and instant mobile payment.

React NativeTypeScriptRTK QueryPayment Gateway+2

Case Study→Live System

Travel / B2B MobileProduction Active

TicketLagbe Agent (B2B Mobile App)

A B2B ticketing mobile app enabling sub-agents to issue tickets, track wallet credit balances, and generate PDF invoices on-the-go.

React NativeTypeScriptGraphQLAsyncStorage+2

Case Study→Live System

Engineering Metrics

Core Skill Metrics & Expertise

Hands-on technical proficiency across cloud infrastructure, REST/GraphQL APIs, PHP/Laravel, NestJS, relational databases, and mobile applications.

Production Rating: 5+ Yrs Senior Level

REST & GraphQL APIs

API Architecture

95%

Designing high-volume RESTful endpoints and GraphQL query/mutation gateways with strict payload validation.

Applied In:TripFindy B2CTicketLagbe B2BGoti PaySimWindy

PHP & Laravel Framework

Production Core

93%

Building scalable MVC architectures, Eloquent ORM relationships, queue workers, and admin management tools.

Applied In:Hello SuperstarsTicketLagbe B2BeMGS MigrationVISA COVID

Node.js & NestJS Microservices

Enterprise Microservices

93%

Architecting modular NestJS dependency injection, custom guards, interceptors, and atomic database transactions.

Applied In:TripFindy B2CBRTC Fleet TelemetryGoti PayAIS-TRAX

PostgreSQL & MySQL Databases

Relational DB Engine

92%

Designing normalized database schemas, complex SQL joins, indexing strategies, and transactional locking.

Applied In:TripFindy B2CTicketLagbe B2BGoti PayBRTC Telemetry

AWS Cloud (S3, EC2, CloudFront)

Cloud Infrastructure

88%

Deploying secure S3 media storage, EC2 server environments, CloudFront CDNs, and signed URL generation.

Applied In:Hello SuperstarsMedia UploadsS3 Bucket Integration

Video SDK & Live Streaming

Real-Time Media

86%

Integrating Video SDK and WebSockets for real-time live broadcasting, interactive video sessions, and streaming.

Applied In:Hello Superstars (Fan-Celebrity Auditions)Live Video Sessions

Next.js & React.js Frontend

SSR & State Management

94%

Building responsive SSR/SSG user interfaces with RTK Query, memoized components, and custom hooks.

Applied In:TripFindy B2CTicketLagbe B2BBRTC Web PortalSimWindy

React Native (iOS & Android)

Play Store Published

88%

Developing cross-platform mobile apps with 60fps FlatList virtualization, WebSockets, maps, and push notifications.

Applied In:Hello Superstars AppSafety GPS MobileTripFindy Mobile

Career Trajectory

Engineering Experience

Sr. Software Engineer

Current Role

Tripfindy (Impressive Group)

Sep 2023 – Present

Architecting B2C travel search engines, NestJS microservices, TicketLagbe B2B portal, and GraphQL APIs with PostgreSQL, Redis, and Next.js.

Software Engineer

Impressive Security Ltd. (Impressive Group)

July 2023 – Dec 2023

Engineered vehicle management systems, real-time fleet telematics tracking, and Bus Rapid Transit (BRT) corridor data analytics.

Software Engineer / Web & Mobile Developer

TFP Solutions Bangladesh Ltd. (Versatilo Group)

Sep 2021 – June 2023

Engineered Hello Superstars (React Native + Socket.io + AWS S3), eMGS Migration Governance System, and VISA COVID pandemic clearance app with Laravel & MySQL.

About The Engineer

Background & Philosophy

I am Apurbo Kumar, a Senior Software Engineer based in Panthapath, Dhaka with 5+ years of experience developing scalable web and mobile software solutions.

I hold a B.Sc. in Computer Science & Engineering from Daffodil International University (DIU). My core specialization is full-stack engineering with PHP, Laravel, NestJS, PostgreSQL, MySQL, REST & GraphQL APIs, and React Native.

I emphasize clean architecture, high performance, and security in production. Whether architecting high-concurrency microservices, integrating payment gateways, or engineering 60fps mobile applications, I focus on delivering long-term maintainability.

Clean Architecture

Decoupled microservices & MVC

High Performance

Sub-50ms Redis caching

Security & Ledger

Fintech tokenization & RBAC

Cross-Platform

60fps React Native apps

Backend

PHPLaravelNestJSNode.jsExpress.js

APIs

REST APIsGraphQL APIsWebSockets

Database

PostgreSQLMySQLRedisSQL

Frontend

Next.jsReact.jsTypeScriptRTK Query

Mobile

React NativeiOS & AndroidPush Notifications

Realtime & Cloud

Socket.ioAWS S3Payment Gateway

Let's Collaborate

Ready to Build Production Systems?

I am open to full-time Sr. Software Engineer roles, high-impact contract work, and technical architecture consulting.

Send Email (apurboka@gmail.com) →LinkedIn Profile