Cesar Contreras

• Collaborated in the migration of Xamarin Forms app to MAUI, resulting in a 20% improvement in app performance and a 15% reduction in development time.
• Collaborated with stakeholders including designers, product owners, architects, and developers to ensure successful delivery of high-quality mobile applications, resulting in a 10% increase in user satisfaction ratings.
• Maintained comprehensive unit tests, increasing test coverage by 25% and reducing the number of post-release bugs.
• Ensured seamless integration with RESTful APIs, resulting in a 25% decrease in integration issues and a 15% improvement in app response time.
• Efficiently troubleshooted and resolved various application issues, leading to a 20% increase in app stability and a 25% decrease in user complaints.
• Supported QA team in developing automation framework, resulting in a 40% decrease in testing time and a 20% increase in test coverage on CI/CD pipelines.
• Collaborated with DevOps team to enhance mobile and automation pipelines, improving build times by 30% and reducing deployment errors by 25%.

Technologies : Xamarin Forms, MAUI, Appium, Azure DevOps, BrowserStack, .Net Core, App Center, Git, Azure Notifications Hub, Adyen, Google Maps, Scandit.

• Developed and maintained user interface designs according to provided mockups.
• Managed database, API endpoints, and backend for smooth system operation.
• Created and maintained administrative features for the web portal.
• Planned the app's structure considering current code and future needs.
• Integrated Google Maps and Azure Notification Hub services.
• Built a custom Geo-fencing feature using 'haversine' formula and GPS coordinates.
• Established a pipeline for continuous integration and deployment.

Technologies : Xamarin Forms, C#, .Net Core, Google Maps API, Azure Notifications Hub, Docker, SQL, Azure DevOps, App Center, Git, Fluent Migrator for .Net.

• Supervised daily team operations, ensuring fair distribution of tasks and sustained motivation and performance levels, overseeing a team of 8 members.
• Introduced and clarified new initiatives to ensure team-wide comprehension, resulting in an increase in productivity by 20%.
• Offered timely and precise feedback on individual performance, conducting regular performance evaluations and setting clear performance goals for each team member.
• Maintained a clean, safe, and supportive work environment for all team members, promoting a culture of inclusivity and respect.
• Established achievable team and individual targets aligned with company objectives, resulting in increased overall satisfaction with professional grow of the team members.
• Conducted regular one-on-one meetings with team members for feedback and support, fostering open communication and addressing any concerns promptly.
• Contributed to all phases of project delivery, including analysis, development, testing, and operations, in various capacities, ensuring projects were completed on time and within budget.
• Supported the architecture of the web automation framework, resulting in increased functionalities that allowed test coverage to increase in more than 50%.
  

Technologies : C#, .Net, Selenium, Azure DevOps, Postman, Grafana, JMeter, Influx DB, SQL Server.

• Supported in maintaining the framework to ensure its smooth operation.
• Ensured scripts ran correctly during regression tests.
• Implemented new features to the framework based on user input.
• Optimized existing solutions to enhance efficiency.
• Mentored and coached team members on QA topics and strategies to write high-quality scripts according to established C# and Selenium standards.
• Participated in regular meetings with cross-functional teams to discuss progress updates, communicate concerns or challenges, and ensure alignment of project goals.

Technologies : C#, .Net, Selenium, TFS API, Gmail API, Outlook API.

• Established connections with local databases to ensure seamless data access.
• Developed user interfaces adhering to mobile operating system (OS) guidelines, prioritizing intuitive design and functionality.
• Enhanced user experience by aligning with established standards on mobile OS guidelines, focusing on simplicity and efficiency.
• Created scalable solutions to accommodate growing needs and ensure long-term viability.
• Fine-tuned existing solutions to improve performance and efficiency.

Technologies : C#, .Net Framework, Xamarin Studio, Xamarin Forms, SQL Lite.

• Developed user interfaces adhering to mobile operating system (OS) guidelines, prioritizing intuitive design and functionality.
• Enhanced user experience by aligning with established standards on mobile OS guidelines, focusing on simplicity and efficiency.
• Created scalable solutions to accommodate growing needs and ensure long-term viability.
• Fine-tuned existing solutions to improve performance and efficiency.

Technologies : C#, .Net Framework, Xamarin Studio, Xamarin Forms.