Open to opportunities

Rezwanul Haque

@rezwanulhaque

Senior Software Engineer with 7.5+ years building scalable Golang/Python/Node.js systems and high-traffic React/React Native products.

Bangladesh

Message

What I'm looking for

I’m looking to lead backend and platform engineering for high-traffic products—owning system design, microservices, and cloud-native performance, while collaborating as a Team Lead to deliver scalable APIs and reliable deployments.

I’m a Software Engineer with 7.5+ years of experience building scalable, high-trafﬁc systems using Golang, Python, and Node.js, with full-stack capabilities in React and React Native across iOS and Android. I’ve consistently driven performance and product outcomes, including optimizing performance for 10x improvements and delivering scalable APIs and distributed system solutions.

In my recent roles (Mahﬁl and other cloud-native environments), I’ve led backend and platform work across microservices, system design, and cloud architecture, including AWS integrations, Kubernetes/Docker-based deployments, and infrastructure automation with Pulumi and Terraform. I also enjoy collaborating as a Team Lead for small groups, using modern tooling and AI tools like ChatGPT, Claude Code, and Gemini to ship efficient, high-quality results.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Kahf Yazilim A.S.

May 2025 - Present (1 year 1 month)

Built and scaled a high-traffic video streaming platform used by millions of users, developing scalable backend and web APIs. Delivered a consistent cross-platform experience across React Native (iOS and Android) by optimizing performance.

React Native iOS Android API Development Performance Optimization High Traffic Systems Cross Platform Development Backend Engineering

Software Engineer II

Craftsmen Ltd

Apr 2024 - Jun 2025 (1 year 2 months)

Developed a React Native blood donation platform with AWS integration. Built a cloud-based multi-tenant leave management system (Cempal) using AWS serverless services including Lambda, DynamoDB (single-table design), SES, Amplify, and API Gateway.

React Native AWS AWS Lambda DynamoDB Serverless Architecture Amazon SES AWS Amplify API Gateway

Senior Software Engineer

Vivasoft Ltd

Mar 2020 - Apr 2024 (4 years 1 month)

Built food delivery aggregator Klikit using Go with Redis and MySQL, deploying with Kubernetes and Docker. Migrated legacy services to Go, deployed on AWS ECS, implemented IaC with Pulumi and Terraform, and led a 3–4 engineer sub-team to drive performance optimizations.

Golang Redis MySQL Kubernetes Docker AWS ECS Pulumi Terraform Performance Optimization

Software Engineer

Binate Solutions Ltd

Mar 2019 - Feb 2020 (11 months)

Developed features and resolved bugs across client projects using Python (Django, Flask), Node.js, Angular, and Ionic. Generated reports and features backed by a complex NoSQL MongoDB database and deployed projects across public clouds using Ansible and Docker.