Sebastian Sierra Ortiz
Software Developer
Medellin,ANT
Summary
Front-End Developer with 10+ years of experience, primarily focused on Angular-based web applications. Highly skilled in UI implementation and design, applying key UI/UX principles to create responsive, user-friendly interfaces. Experienced in unit testing using tools such as Karma, Jasmine, Jest, and Angular TestBed. Notable achievements include redesigning and optimizing the company’s main web application interface, significantly improving load times, and implementing lazy loading techniques to address performance issues.
Overview
9
9
years of professional experience
2
2
Languages
Work History
Staff Software Engineer
Growth Acceleration Partners
Medellin, ANT
07.2022 - Current
- Collaborated with cross-functional teams to deliver high-quality software products on schedule.
- Improved software performance by identifying and addressing bottlenecks in the codebase.
- Performed root cause analysis on reported issues, swiftly resolving bugs while minimizing disruptions to users'' experiences.
- Managed source code repositories, enforcing version control policies and facilitating efficient collaboration among team members.
- Reduced application load times by optimizing database queries and streamlining data retrieval processes.
- Evaluated third-party libraries for compatibility with existing systems before integrating them into core software platforms.
- Leaded a team of four devs and two testers so we achieve the goals for every iteration.
- Help the team to split user stories so we could share work better
Tech Lead Frontend Developer
Perficient Latam
Medellin, ANT
05.2019 - 06.2022
- Mentored junior developers through regular 1-on-1 meetings, providing guidance on best practices, coding standards, and career growth opportunities.
- Coordinated with cross-department teams like QA, DevOps, and Support to ensure seamless end-to-end software delivery process.
- Implemented continuous integration and deployment strategies for faster release cycles and improved application reliability.
- Maintained close communication with clients throughout project life cycles for accurate progress reporting and prompt issue resolution.
- Developed front-end features for a mobile application using Angular, Angular Material, Bootstrap, and Ionic.
Frontend Developer
Perficient
Medellin, ANT
08.2016 - 05.2019
- Contributed to developing a mobile application using Angular and Ionic, focused on sales and full operational workflows for restaurants.
- Transform and design new changes for a web app utilizing Vue.js using BootstrapVue for the user interface in responsive and desktop UI's.
- Implemented features supporting the entire restaurant process, from client menu selection to cashier interactions, payments, and kitchen coordination.
- Adapted application behavior based on user roles, ensuring role-based access and functionality across the platform.
- Implemented new layouts and UI components using AngularJS and later Angular, with a focus on responsive-first design for the web application.
Integrated social media preload functionality using Angular Universal to enhance performance and SEO. - Added video functionality and contributed to mobile development using Ionic, while applying CSS3, Flexbox, and Bootstrap to ensure cross-device responsiveness.
Education
Software Engineer - Engineering
Universidad De Medellin
Medellin 05.2001 -
Skills
Project leadership
Agile methodology
Systems development lifecycle management
Technical analysis
Technical mentoring
Design development
Code review expertise
Mentorship and coaching
Performance optimization
Front-end development
Timeline
Staff Software Engineer
Growth Acceleration Partners
07.2022 - Current
Tech Lead Frontend Developer
Perficient Latam
05.2019 - 06.2022
Frontend Developer
Perficient
08.2016 - 05.2019
Software Engineer - Engineering
Universidad De Medellin
05.2001 -