Lucknow, India

Senior Full-Stack Engineer with industry experience of 8+ years scaling SaaS platforms using Ruby on Rails, React, and TypeScript.

Mansoor Khan — Senior Full-Stack Software Engineer
15 yrs shipping
0
Years shipping
2011 → today
0
Companies
Self-employed · Incubyte · GitLab · West Agile Labs
0
Projects
1 featured
0
Case studies
deep dives
0
Skills
across the stack

About

Senior Full-Stack Engineer with industry experience of 8+ years scaling SaaS platforms using Ruby on Rails, React, and TypeScript. Achieved 99.9% query performance improvement at GitLab, 98% API response reduction serving 350+ B2B clients. Specialized in async-first remote collaboration, database optimization, and open-source contribution.

Selected work

All projects

Experience

Independent Projects & Open Source

2025 — present
Self-employed

• Built Roosnam – open-source portfolio platform using Rails 8, React/Next.js, and TypeScript. • Developed AI-powered applications integrating LangGraph and Google Gemini for multimodal analysis. • Participated in 3 global AI hackathons (Dubai AI Genesis, IBM Watsonx, Kaggle) building automated workflow systems.

Senior Software Engineer

2024 — 2025
Incubyte

• Developed HIPAA-compliant two-way SMS functionality using Ruby on Rails 7, React, and RSpec. • Reduced Twilio billing costs through SMS character validation enforcing GSM-7/UCS-2 limits. • Rebuilt client's component library using Chakra UI v3 + React 17, improving developer experience and UI consistency. • Optimized CI/CD pipelines in CircleCI, reducing test suite runtime and container costs.

Backend Engineer

2022 — 2023
GitLab

• Reduced query time from 2.7 minutes to 2ms using partial indexes in PostgreSQL (99.9% improvement). • Built scalable APIs enhancing core product features used by millions of developers worldwide. • Remediated critical security vulnerabilities in Rails-based services; collaborated async-first across global time zones.

Senior Software Engineer

2021 — 2022
West Agile Labs

• Modernized legacy HIPAA-compliant system implementing new privacy workflows with improved UX. • Integrated EHR systems with patient-consent logic using Rails 6 and PostgreSQL. • Introduced Amazon SQS for inter-service messaging (Ruby ↔ Python) and implemented A/B testing for user engagement optimization.

Tech Lead

2017 — 2021
Virtual Diamond Boutique

• Led development of a SPA serving 350+ B2B clients (150+ customizations, 200+ white-label) using Angular, Rails, ElasticSearch, and PostgreSQL. • Achieved 98% API response time improvement (7 minutes → 10 seconds) through architectural optimization. • Integrated secure PayPal payments and in-app Twilio calling for seamless user experience. • Mentored junior developers, established TDD practices with RSpec, and drove code review culture.

Software Engineer

2011 — 2017
Early Career

UI Consultant at Enquero (Angular 2), Full Stack Developer at TeliportMe (PHP/Zend), freelance development.

Case studies

Read all

Stack & schooling

Tech stack

RubyPythonJavaScriptTypeScriptPHPHTMLCSSRuby on RailsDjangoFlaskReactNext.jsAngularPostgreSQLMySQLRedisElasticsearchAmazon SQSDockerCircleCIGitGitHubGitLabChakra UIRSpecREST APIRabbitMQTeam LeadershipRemote WorkPerformance OptimizationSecurityAgileDevOpsCI/CDTest-Driven DevelopmentA/B TestingREST APIsEHR SystemsDatabase Optimization

Education

Mysore University
MCA · 2025
68%
Lucknow University
B.Sc. · 2009
61%