Open to opportunities

Muhammad sajid Chowdhury

@muhammadsajidchowdhu

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Ruby on Rails engineer delivering scalable backend systems, mentoring teams, and improving reliability.

Bangladesh

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What I'm looking for

I seek a role building reliable backend systems where I can lead technical designs, mentor engineers, and improve security and test quality.

I am a Ruby on Rails developer with 3+ years of experience designing and building scalable applications, reducing manual reporting and operational effort while improving security and test coverage. I have been promoted rapidly for technical depth and leadership, led migration projects, implemented background jobs, and integrated third-party APIs.

I mentor junior engineers, conduct technical interviews, and coordinate with international stakeholders to align solutions with client needs. My achievements include delivering a workforce management system that cut manual reporting by 80%, improving RSpec coverage to 85%, and leading teams in hackathons and security initiatives.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer L3

Current

WellDev

Jul 2025 - Present (3 months)

Promoted from L1 to L3 for technical leadership; designed a Workforce Management System that cut manual reporting by 80% and saved operations 20+ hours monthly while mentoring junior engineers and improving code quality.

Ruby on Rails GraphQL Sidekiq RSpec PostgreSQL GCP Docker Git

Software Engineer L1

WellDev

Jul 2024 - Jun 2025 (11 months)

Designed scalable background jobs reducing request latency by 40%, transitioned authentication to session-based, integrated Google APIs, led vulnerability assessments, and raised RSpec coverage to 85%.

Ruby on Rails Sidekiq RSpec Security Testing CI CD Vulnerability Management

Junior Software Engineer

WellDev

May 2023 - Jun 2024 (1 year 1 month)

Built CRUD applications and internal tools in Rails 8, implemented role-based access control, and integrated third-party APIs (Google, Jira, Slack) while delivering sprint stories within Agile workflows.

Ruby on Rails Pundit CanCanCan REST APIs Jira Slack Agile

Trainee Software Engineer

WellDev

Nov 2022 - Apr 2023 (5 months)

Migrated a legacy Rails 3 project to Rails 6, modernizing the codebase and contributing bug fixes, migrations, and feature implementations to improve stability and security.

Ruby on Rails Testing Legacy Codebases