Hafeez (Ur) Ur Rehman
Senior Ruby Full Stack Developer
Experience
Senior Ruby Full Stack Developer
Veroke
- Led the development of scalable SaaS platforms using Ruby on Rails and React.
- Developed and maintained high-traffic Ruby-based applications serving 500K+ active users.
- Designed and delivered RESTful APIs, ensuring seamless frontend-backend integration.
- Collaborated with UI/UX designers to create visually appealing and user-friendly interfaces using HTML, CSS, and JavaScript.
- Implemented automated testing (RSpec, Capybara) achieving 90%+ coverage and reducing production bugs by 25%.
- Established CI/CD pipelines with GitLab, reducing deployment time by 40%.
- Mentored a team of 4 junior developers, introduced coding standards, and conducted code reviews to raise overall code quality.
- Worked directly with stakeholders to refine requirements, ensuring the timely delivery of features in Agile Scrum sprints.
Senior Full Stack Developer
iSOFT Studios
- Improved database query efficiency, boosting overall system performance by 30%.
- Implemented responsive UIs, improving page load speed by 20%.
- Enhanced usability, reducing bounce rate significantly.
- Integrated 10+ third-party APIs to expand product features and interoperability.
- Partnered with product managers and UI/UX teams to deliver responsive, user-centric web interfaces.
- Contributed to Agile ceremonies, ensuring 95% of sprints were delivered on time.
- Provided knowledge-sharing sessions and peer training, helping upskill junior engineers on Ruby and React.
Software Developer
AlgoRepublic
- Contributed to 3 major web platforms (education management, healthcare, and surgery systems).
- Designed and implemented core features in Ruby, JavaScript, and HTML, enhancing platform functionality for 10K+ users.
- Enhanced system usability and reliability, resulting in positive client feedback and long-term partnerships.
- Supported deployment pipelines and testing efforts, ensuring timely releases with minimal production issues.
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Information Technology (4 years), Education (1.5 years), and Healthcare (1.5 years).
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Information Technology (5.5 years), Product Development (5.5 years), and Quality Assurance (1.5 years).
Summary
Versatile and results-driven Senior Software Engineer with 5+ years’ experience designing and delivering scalable web applications. Proven expertise in Ruby on Rails, Node.js, React, and modern cloud-native practices, with strong leadership in mentoring teams, driving Agile delivery, and ensuring software quality.
Skills
- Backend & Frameworks: Ruby On Rails, Node.js, Restful Apis, Microservices
- Frontend: React, Javascript (Es6+), Html5, Css3
- Databases: Postgresql, Mysql, Query Optimisation
- Cloud & Devops: Docker, Ci/cd (Gitlab, Jenkins), Aws
- Testing & Quality: Rspec, Capybara, Tdd/bdd
- Agile Delivery: Scrum, Jira, Bitbucket, Git
- Leadership: Mentoring, Code Reviews, Stakeholder Collaboration, Project Ownership
Languages
Education
University of Chester
MSc Programme & Project Management · Programme & Project Management · Chester, United Kingdom
PMAS Arid University
BS Computer Science · Computer Science · Rawalpindi, Pakistan
Profile
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