Kamlesh Kumar
@kamleshkumar1
Senior Ruby on Rails full-stack developer delivering scalable, data-driven web applications and cloud deployments.
What I'm looking for
I am a Senior Ruby on Rails full-stack developer with 15+ years building large-scale, data-driven web applications that prioritize maintainability and performance. I specialize in object-oriented Ruby, Active Record data modeling, and optimizing PostgreSQL/MySQL databases for high-transaction workloads.
I have led projects modernizing legacy systems, migrating databases to PostgreSQL, and deploying Rails applications to AWS with CI/CD, Docker, and automated infrastructure as code. I design service objects, presenters, and modular front-end widgets using jQuery to create responsive, accessible UIs and real-time features via ActionCable.
I mentor engineers, apply SOLID principles and design patterns across monolithic and service-oriented Rails architectures, and deliver multi-tenant SaaS platforms, analytics dashboards, and secure authentication/authorization systems that scale in production.
Experience
Work history, roles, and key accomplishments
Lead Ruby on Rails Full Stack Developer
HD Supply
Jun 2022 - Present (3 years 5 months)
Led design and delivery of multi-tenant Rails SaaS platforms, implemented CI/CD and AWS infrastructure to enable zero-downtime deployments and improved scalability. Modernized legacy apps with service objects, Docker, ActionCable, and PostgreSQL optimizations to boost performance and maintainability.
Lead Software Engineer - Ruby on Rails
Fidelity Investments
Oct 2019 - May 2022 (2 years 7 months)
Architected and delivered enterprise Rails dashboards and APIs, migrated databases to RDS and implemented background processing and secrets management to improve reliability and security. Mentored engineers and refactored monoliths into modular, object-oriented components.
Senior Ruby on Rails Developer
Boeing
Oct 2017 - Sep 2019 (1 year 11 months)
Implemented scalable Rails services, background job processing, and versioned APIs while optimizing DB queries and caching to improve performance and developer productivity. Managed AWS accounts and reduced infrastructure costs via right-sizing and reserved capacity.
JavaScript Developer
Cardinal Health
Mar 2016 - Oct 2017 (1 year 7 months)
Built analytics and interactive Rails front-ends using advanced SQL, jQuery visualizations, and background processing to support complex transactional workflows and multilingual user interfaces. Mentored junior developers on web and DB best practices.
PostgreSQL Developer
Tesla
Aug 2014 - Mar 2016 (1 year 7 months)
Designed normalized PostgreSQL schemas, implemented advanced queries and migrations, and refactored Rails models into maintainable, object-oriented components to improve data integrity and application performance. Led data migrations between MySQL and PostgreSQL.
CSS Developer
State of NY
Jul 2011 - Aug 2014 (3 years 1 month)
Rewrote legacy front-end components for accessibility and modern JS compatibility, implemented multilingual Rails features, and optimized PostgreSQL queries and connection pooling for high-concurrency public applications.
Software Developer
Ascensia Diabetes
Sep 2008 - Jul 2011 (2 years 10 months)
Developed full-stack Rails applications with responsive UIs, enforced Active Record data integrity, and refactored monolithic systems into modular, object-oriented architectures to improve maintainability and scalability.
Education
Degrees, certifications, and relevant coursework
Osmania University
Bachelor of Science, Science
Completed a Bachelor of Science at Osmania University with coursework supporting foundations in computing and related sciences.
Tech stack
Software and tools used professionally
Sidekiq
Chart.js
Highcharts
AWS IAM
Amazon EC2
Amazon S3
Docker Compose
Amazon CloudFront
AWS CodePipeline
MySQL
PostgreSQL
Gmail
Ruby on Rails
Redis
Terraform
AWS CloudFormation
jQuery
jQuery UI
JavaScript
HTML5
PHP
JSON
XML
Amazon ElastiCache
Windows
Capistrano
AWS Lambda
Amazon RDS
RSpec
NGINX
Time Analytics
Service Layers
AWS Elastic Beanstalk
SQL
actioncable
Availability
Location
Authorized to work in
Job categories
Skills
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