Winnie Rotich

As a Software Engineer at Effective Experiments, I played a crucial role in developing and maintaining a robust experimentation management platform. My work focused on backend development using Ruby on Rails, optimizing database performance, designing scalable APIs, and implementing automation for data processing. I collaborated closely with cross-functional teams including the design, frontend and QA teams to enhance platform functionality and user experience. Key Responsibilities • API Development and Integrations – Designed and maintained RESTful APIs to facilitate smooth data exchange and third-party integrations. • Performance Optimization – Improved database queries, caching mechanisms, and background job processing for efficiency. • Feature Implementation – Developed key features such as advanced reporting, automated workflows, and experiment tracking. • Data Processing – Built CSV import functionality and optimized bulk data handling with background job integration. • Security & Code Quality – Ensured adherence to best practices, testing, and security standards. • Collaboration & Mentorship – Worked with cross-functional teams and mentored junior developers. • Technology Upgrades – Led efforts in upgrading Rails and resolving legacy code issues. Notable Successes • Successfully optimized the CSV import process, reducing processing time by over 50% through background jobs and batch processing. • Spearheaded the development of a dynamic tagging system, enhancing data organization and retrieval. • Led major Rails upgrades, resolving breaking changes and ensuring smooth deployment. • Improved database performance by optimizing complex queries, reducing response times for key reports. • Assisted in streamlining deployment workflows, improving CI/CD processes for faster releases.

At Equipe Technique, I was part of a team that built different products for different clients. Key Responsibilities include: • Collaborating with internal technology teams and third-party partners to define, design, and deliver user stories and customer roadmaps. • Collaborating with developmental team members to build features, identify, solve, and remove software bugs, bottlenecks and threats. • Developing scripts to communicate with back-end servers in order to provide real-time updated information. • Documenting all technical specifications and testing methods for future reference. • Mentoring new teammates while ensuring their onboarding process into the team is seamless Notable Successes • Deployed a major project in May 2020 to production by collaborating with an agile development team and testing, developing, and maintaining web and desktop-based soware applications. • Built a new and innovative integrated Lead management system using Ruby on Rails and Active Admin for use primarily in the home improvement industry. This project is currently having an average of 1000 new customers and a turnover of €300,000 per month. • Introduced automation tools, including Jira and CircleCI to reduce redundancy by 50% and enhance workflow by 20%. • Developed full life-cycle tests and trials of a lead management system.

As a member of a project that helped the company in recruiting engineers, I built and integrated a survey feature that enabled the company to collect more accurate data from its prospective candidates. This feature improved the data analysis by 70%. I volunteered to be a mentor and facilitator for Teen Code Africa which trained over 200 teens and 5 of them were my mentees under the JavaScript track. Being part of various teams, I was able to collaborate in code reviews which resulted in achieving code maintainability of A and test coverage of over 80%

As a result of keeping an updated weekly Incident Tracker, we achieved a KPI on Expired changes tickets closure and thus improved performance by 22% compared to the previous quarter. Due to reviewing 90% of process documents in the Technology department, we received a certificate of conformity of technology processes to ISO 20000 standards. Improved network coverage by 20% in areas tests were done through submission of analyzed data and reports on walk tests I participated in.

Following up on Fiber enterprise clients with fiber cuts and any fiber-related issues reduced client churns in the fourth quarter by 15% as compared to the previous. Improved customer feedback by keeping an updated record of tickets with unresolved network issues and escalating them appropriately.