Available for opportunities

Rasel
Kabir

Backend-focused full-stack developer with 5 years of experience delivering scalable software. Expert in .NET, microservices, and cloud-native architecture across B2B & B2C systems.

Get in Touch View Projects →
5+
Years Exp.
4
Live Projects
M+
Txns / Day
Technical Stack

What I work with

Languages
C# TypeScript JavaScript SQL JQuery
Frameworks & Libraries
.NET Core .NET 8 ASP.NET MVC EF Core Dapper Angular
Databases
MS SQL PostgreSQL MongoDB Redis
Cloud & DevOps
AWS EC2 AWS S3 AWS RDS Docker Linux
Architecture
Microservices Clean Architecture SOLID gRPC API Gateway Repository Pattern
Messaging & Monitoring
Kafka RabbitMQ Serilog Elasticsearch Grafana Loki
Career

Experience

Mar 2022 – Present
Backend Software Engineer
TechnoNext Software Limited · Baridhara, Dhaka
  • Managed a team of 5 developers to design, develop and deploy RESTful APIs using .NET Core for web and mobile apps, with Angular UI.
  • Built Auto/Manual transaction APIs processing millions of daily B2B/B2C transactions for a Chart of Accounting system.
  • Developed RESTful APIs for manual ticket booking, ticket reissue, and agent balance top-up — improving system stability and feature coverage.
  • Secured applications with JWT authentication and improved file storage with AWS S3 integration and global exception handling.
  • Optimized SQL queries and redesigned database architecture, reducing all report API response times by 50%.
May 2020 – Mar 2022
Full Stack Jr. Software Engineer
Enkaizen · Mohakhali DOHS, Dhaka
  • Led development of a SIM Registration APP with RESTful APIs and Vue.js frontend — covering customer registration, coupon distribution, and user management.
  • Implemented repository pattern and integrated ASP.NET Identity with JWT authentication.
  • Migrated legacy features from ASP.NET Web Forms to MVC 5 and developed advanced reports using Crystal Reports.
  • Designed database schema and created user-friendly interfaces with Vue.js.
Work

Projects

01 / Production
Chart of Accounts (COA) — Accounting System
A unified COA system processing financial transactions for all B2B and B2C clients with millions of daily transactions and real-time reconciliation.
.NET Core SQL B2B / B2C Microservices
View Project →
02 / Production
OTA — Online Travel Agency (B2B)
Scalable OTA platform supporting B2B operations — flight search, booking, and payment processing built for agency partners at scale.
ASP.NET Angular AWS JWT
View Project →
03 / Production
OTA — Online Travel Agency (B2C)
Customer-facing OTA platform with flight search, booking flows, and integrated payment processing — optimised for end-user experience and performance.
.NET 8 Redis PostgreSQL Docker
View Project →
04 / Production
Cellect — SIM Registration & Management
Comprehensive SIM registration app with customer account creation, targeted coupon distribution, and admin user management built for telecom operations.
ASP.NET MVC Vue.js MS SQL Identity
View Project →
Academic

Education

BSc in Computer Science & Software Engineering
Bangladesh University of Business and Technology (BUBT)
2020 CGPA 3.20 / 4.0
Diploma in Computer Technology
Naogaon Polytechnic Institute
2015 CGPA 3.66 / 4.0
SSC — Science
Mohabtpur Degree Madrasah
2011 GPA 5.00 / 5.0
Let's Connect

Get in touch

Open to backend engineering roles, technical discussions, or freelance projects. Feel free to reach out through any channel below.

raselkobir57@gmail.com +88 01773-206744