Mohamed R. - Software Engineer

Berlin, Germany

Experience

Mar 2022 - Aug 2025

3 years 6 months

Germany

Led the implementation of a critical backend initiative for the offer teasing feature, resulting in a 10% increase in users actively seeking counter offers.
Contributed to high-impact features such as instant advice, customer ratings, and automatic contract switching, leading to increased user engagement and conversion rates.
Built a gRPC service to integrate internal systems with the ERP platform, improving the reliability and observability of data exchange.
Refactored parts of the legacy Ruby codebase into a more maintainable and scalable Elixir-based architecture.
Delivered a greenfield project from concept to production on a new stack, integrating with internal services and managing infrastructure setup and deployment.
Collaborated closely with the front-end team, product managers, and cross-functional team members to ensure the seamless integration of backend features, fostering effective communication and collaboration across disciplines.
Stack: Ruby, Ruby on Rails, Elixir, OTP, Phoenix, REST, GraphQL, gRPC, PostgreSQL, AWS, Cognito, Lambda, SNS, SQS, Terraform, Helm, Docker, CI/CD, Grafana, Prometheus, Git, Agile Methodology.

Jun 2021 - Mar 2022

10 months

Refactored legacy code in a monolithic app, modularizing code dependencies, e.g., for timecards and time tracking and other HR functions.
Successfully implemented eSignature features using HelloSign, streamlining the document signing process within the workforce management platform, improving operational efficiency and ensuring enhanced compliance standards.
Collaborated closely with the front-end team to develop REST APIs for the mobile application, fostering seamless communication between the backend and frontend and delivering a cohesive user experience.
Stack: Ruby, Ruby on Rails, RSpec, MySQL, JavaScript, Git.

Feb 2021 - Jun 2021

5 months

Canada

Functioned as a consultant to help the company bring an outsourced project in-house, ensuring proper implementation and bug fixes.
Developed documentation for easing the on-boarding process.
Stack: Ruby, Ruby on Rails, RSpec, MySQL, AWS Elastic Beanstalk, CI/CD, Git.

May 2020 - May 2021

1 year 1 month

Egypt

Spearheaded continuous improvement efforts, enhancing software code quality, and implementing automated tests for comprehensive backend coverage, ensuring the delivery of a robust and scalable solution.
Actively contributed to the development and maintenance of a cross-platform mobile application, leveraging React and React Native to ensure a seamless user experience.
Demonstrated leadership by ensuring clear understanding of goals, scope, and product domain throughout the team.
Engaged in business analysis discussions, owning the integration with a Mobile Device Management (MDM) system and successfully providing full remote control and management of drivers' Android devices, addressing security and reachability issues.
Stack: Ruby, Ruby on Rails, RSpec, PostgreSQL, AWS, React, React Native, Terraform, Docker, CI/CD, Git.

Oct 2017 - Apr 2020

2 years 7 months

Egypt

Contributed to the design, implementation, testing, and deployment of PassApp's web portal and RESTful APIs.
Collaborated closely with the hardware team, actively participating in firmware updates, device configuration, logging, and monitoring.
Took on responsibilities for integrating and communicating with third-party providers, enhancing the overall ecosystem of services, including payment integration and geo services.
Stack: Ruby, Rails, TDD, RSpec, PostgreSQL, AWS EC2, RDS, Kibana, ELK Stack, Docker, Sidekiq, Git.