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Sadan Masroor

Full stack developer

London
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With over 15 years of experience, I am a seasoned full-stack developer, skilled in Elixir, Ruby on Rails, React, React Native, and Node.js, among others. My passion lies in solving complex computer science problems, designing scalable solutions, and crafting high-quality software products. I've had the privilege of working with prestigious organizations like Mastercard Foundation and Booking.com, developing concurrent backends for web and mobile platforms used by millions daily. My proficiency extends to creating applications for diverse sectors, including ERP systems, healthcare, advertising, banking, e-learning, and social networks. I am a strong advocate for client-friendly practices, ensuring open communication, flexible working hours, and complete transparency. My code is not just functional but well-designed, maintainable, and future-proof. Let's leverage my skills to bring your vision to life!

Careers

Senior Software Engineer

Apptimum Labs

Full time contract02/2022 -
  1. Spearheaded the implementation of microservices in Elixir, Ruby, and NodeJS.
  2. Designed and developed APIs to support front-end applications.
  3. Crafted data models to meet client-specific requirements, enhancing functionality.
Senior Software Engineer

MasterCard Foundation

Full time contract12/2016 - 11/2021
  1. Built & deployed scalable microservices (Elixir, Python, Ruby) for data processing via REST APIs.
  2. Improved code quality (800+ bugs/vulnerabilities fixed) following SonarQube standards.
  3. Agile expert (SCRUM, sprint tasks) & user-centric requirement gathering.
  4. Designed system architecture (Figma → VueJS → Firestore).
  5. Managed cloud infrastructure deployment & maintenance.
  6. Ensured software quality & continuous delivery, troubleshooting in production.
  7. Aligned UI/UX design with standards & conducted user testing/design evaluations.
  8. Proficient in Agile & Scrum development processes with weekly objectives.
Senior Software Engineer

Booking.com

Full time contract10/2014 - 11/2016
  1. Designed and implemented user interfaces for web applications.
  2. Resolved complex software issues efficiently and assisted junior developers with debugging.
  3. Created algorithms for system optimization, monitored performance, and identified improvement areas.
  4. Collaborated with team members to meet project deadlines and implemented new software features.
Software Engineer

Induction Healthcare UK

Full time contract08/2012 - 09/2014
  1. Wrote functional, unit, and integration tests for application quality
  2. assurance in Ruby and Python.
  3. Managed version control using Git and GitHub for code storage.
  4. Executed database migrations with Ruby on Rails and ActiveRecord.
  5. Implemented custom credit card forms and ensured payment reliability
  6. using Stripe API.
  7. Integrated email functionality in applications through Sendgrid.
Freelance Full Stack Developer

Upwork/Elance

Freelancer12/2007 - 07/2012
  1. Worked as an independent contractor on web applications in Ruby, Elixir,
  2. React, React Native, and Node.
  3. Front-end development in HTML/CSS and JavaScript.
  4. Developed detailed plans for projects based on customer needs and
  5. expectations.
  6. Developed innovative solutions to challenging problems

Education

University of London

Computer Science

03/2004 - 04/2007Bachelor's DegreeClass of 2007

My projects

Qalorie - Healthcare Platform

portfolio show

I played a pivotal role in overcoming challenges and advancing the platform, which aimed to enhance the accessibility and effectiveness of weight loss by connecting users with health coaches.

Role: Full Stack Developer

Completed: 1/2023

Live project: https://qalorie.com/

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Skills
PythonNodeReact NativeReact.jsRuby on RailsTypeScriptJavascriptPHPVueAngular
ExperienceSenior-level8+ years
Hourly rate$50/hr
Open to
remote

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