# Yanny Castrillon > Software Engineer Location: Elizabeth, New Jersey, United States Profile: https://flows.cv/yanny I am a software engineer with previous experience with startups and major corporations. I’m looking for new opportunities with a fast-paced company that is open to innovative ideas and advanced technologies. I feel that my experience with both my bachelor degree in computer science and my work as a software engineer affords me the ability to interpret and understand the abstract while still able to collaborate with designers and client-facing colleagues. I'm currently reading and working on Ruby on Rails APIs and the Facebook framework: React. Technical Skills: Programming Languages: | Ruby | JavaScript | Typescript Front-end Frameworks: | React | Bootstrap | JQuery | Sass Back-end Frameworks: | Ruby on Rails | Databases: | PostgreSQL | Redis | MySQL | Tools & Deployment: AWS | Docker | kafka | Jenkins | ArgoCD | GitHub Actions | Cloud Services| K8 | Specialties: API Design | Scalable Microservices | Event-Driven Architectures | MVC Architecture | RESTful Services | Software Design Testing & Monitoring: RSpec | Jest | New Relic | ## Work Experience ### Senior Software Engineer @ Lovevery Jan 2020 – Jan 2025 | New York, United States - Tech lead for the end-to-end creation of the mobile app’s Internationalization feature, delegating tasks across the development team, and overseeing documentation, design, and implementation, expanding accessibility to 32+ countries across 4 regions (US, UK, EU, AU). - Guided the development and deployment of a push notification system, driving an increase of 65,000 daily active users and enhancing Lovevery's user engagement. - Led cross-functional teams in designing and deploying the Admin UI, enhancing Lovevery's internal tools for managing mobile user's Q&A, expert profiles, and support tickets, which resulted in faster issue resolution and a 30% improvement in customer experience. - Directed the mobile app content migration from WordPress to Contentful, leading cross-functional teams to reduce content management workflow time by 60%. - Oversaw the design and maintenance of RESTful API endpoints using Ruby on Rails, ensuring seamless integration with the iOS and Android mobile apps to maintain high system reliability. - Led and built the integration of New Relic for observability, introducing Slack alerts and dashboards that reduced bug resolution time by 20% and enabled proactive monitoring for our Content import process and Push Notification systems. - Drove the development of recurring pay-up-front UI components using TypeScript and ReactJS, contributing to an annual revenue growth of $2M–$5M. ### Software Engineer || @ Runa Jan 2019 – Jan 2020 | Mexico - Led a team of 2+ engineers to integrate the company’s email communication system with CustomerIO, improving email deliverability and tracking, resulting in a 25% increase in engagement rates. - Led a team of 2+ engineers to implement and integrate POEditor for localization and translation, streamlining workflows and reducing translation errors by 20%. - Increased RSpec test coverage from 25% to 60%, reducing production bugs by 40%. - Mentored junior engineers and delivered internal tech talks, fostering collaboration, accelerating team onboarding, and boosting productivity by 15%. ### Full Stack Engineer @ Endava Jan 2018 – Jan 2019 | Medellín, Antioquia, Colombia - Designed and implemented formularies to validate and capture client information, reducing data errors by 25% and accelerating onboarding for 50+ clients. - Migrated 1,000+ lines of stored-procedure logic from Postgres to Ruby on Rails, decreasing debugging time by 30% and improving maintainability. - Implemented RESTful endpoints in an MVC architecture to manage formulary data, cutting processing time by 20% and enabling real-time updates. Increased test coverage from 23% to 60%, reducing production bugs by 35% and saving 100+ developer hours per quarter. - Learned and developed front-end features with the Polymer library, improving UI performance by 10% and boosting client satisfaction scores by 15%. ### Software Engineer @ JOANY Jan 2017 – Jan 2018 | Greater Los Angeles Area - Worked Ruby on Rails and React + Redux applications, supporting critical healthcare industry operations and serving 1M+ end users. - Designed and implemented comprehensive testing suites using RSpec TDD, reducing bugs by 30% and accelerating development cycles by 20%. - Developed internal tools using Active Admin, improving customer experience team efficiency by 15% and saving over 200 hours per month. - Built and deployed 10+ React components for the concierge tool and research study, enhancing user engagement metrics by 25% within 3 months. - Automated Ruby scripts for Big Data ingestion, processing over 5 million records during open enrollment, reducing manual processing time by 40% and ensuring 99.9% data accuracy. - Designed and integrated scalable data pipelines, reducing query times by 15% and enabling faster decision-making for a team of 10+ analysts. ### Data Science Engineer @ JOANY Jan 2017 – Jan 2017 | Greater Los Angeles Area -Develop scripts for Big Data ingestion. -Design, build, and integrate data from various resources to optimize company's data ecosystem. -Automate menial tasks to increase efficiency of data ingestion and integration. -Maintain data infrastructure. ### Teacher Assistant @ General Assembly Jan 2017 – Jan 2017 | Greater Los Angeles Area - Provide answer to coding questions related to Ruby on Rails, Postgresql, React, MongoDB, JavaScript, Node, and other technologies, while providing targeted feedback. - Assist students after class to reinforce the day's lessons. - Discuss contextual topics like programming concepts to help students digest and understand the overall point. - Pair program with the students to understand their code, guide them through the whole problem solving process and eventually to a reasonable solution. ### Web Developer @ Nebular Jan 2016 – Jan 2016 | Medellin, Colombia - Worked as a web developer on a startup, primarily working in HTML | CSS | JavaScript. - Meet clients to assess their technical needs in order to build software solutions. - Contributed to the backend with a Ruby on Rails project specialising in retrieving data from an excel sheet and building up reports. ### Software Analyst @ Cdiscount Jan 2013 – Jan 2016 | Colombia Experience - Develop and maintain new/existing features in the front-end of the application. Technologies: HTML, CSS, Javascript, C#, .Net. - Acted as a single point of contact between Cdiscount France and Cdiscount Colombia for development purposes and strategic decision. - In charge of managing new knowledge acquire from IT training sessions between Cdiscount Colombia and headquarters Cdiscount France with the goal of understanding the platform and applying it correspondingly. - Acted to improve reports and debugging (front-end) processes with the goal of achieving better results to the company. - Contribute on technical and strategical aspects to marketing and commercial areas of the company on new campaigns with the goal of achieving a greater revenue on sales. Functions: - Manage, inspect and support the actual e-commerce order process. - Retrieve data (via SQL) from DB and build order reports for decision making. - Prioritise bugs with the IT team and resolve issues by other areas of the company. - Contribute from an IT perspective on new marketing and commercial campaigns. ### Software Developer @ TLM Ltda Jan 2013 – Jan 2013 - Collect data from excel or xml, parse it down and save it correctly on the db. - Build dedicated reports on PDF (Create and export data). - Develop incoming requirements from existing/new clients. - Maintain and debug the application code. - Improve internal development processes in a scrum environment - Refactor important portions code. Technologies used: Java | Struts | Hibernate | JDBC | JSF | JSP ### An Industry Perspective, Computer Science (Infosys Courses) @ Infosys Jan 2012 – Jan 2012 - Object Oriented Programming. - Front-end development (JavaScript, JSP, HTML). - Back-end development (Java). - Relational Database (SQLManager, MySQL, Oracle). - Unit Testing. - MVC Architecture. It was a very complete training for acquiring the skills and competencies required by the software development market today. ## Education ### Bachelor’s Degree in Systems Engineering Universidad EAFIT Jan 2008 – Jan 2013 ### WDI - Web Development Immersive in Front-End / Back-End Web Development General Assembly Jan 2016 – Jan 2017 ### High School Colombo Britanico Jan 2007 – Jan 2008 ### High School Roselle Park High school Jan 2002 – Jan 2006 ## Contact & Social - LinkedIn: https://linkedin.com/in/yanny-castrillon-8b2128100 --- Source: https://flows.cv/yanny JSON Resume: https://flows.cv/yanny/resume.json Last updated: 2026-03-22