Available to hire
I’m Miguel Eduardo Martínez Varona, a Senior Full Stack Developer with 12+ years of experience building scalable web applications across CRM, ERP, and e-commerce. I specialize in TypeScript and Node.js (including NestJS and Express), and I work comfortably across front-end frameworks like Angular, Vue, and React—often delivering end-to-end features from API design and performance tuning to polished UI integration.
I’ve also led legacy migrations to microservices and supported distributed Agile/Scrum teams across the USA, India, and Latin America. In addition, I integrate LLM APIs and use AI-assisted development tools (like Claude/OpenAI-based workflows) to speed up delivery and build AI-powered features, with strong cloud experience on Microsoft Azure and AWS.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Language
Spanish; Castilian
Fluent
English
Fluent
Work Experience
Senior Full Stack Developer at Epicor
June 1, 2024 - PresentDeveloped full stack features for a custom CRM platform for a U.S. auto parts sales company, including inventory management, customer tracking, and order flow. Built dynamic front-end components with Angular 22 and Vue 3, and RESTful APIs using NestJS and TypeScript. Wrote and optimized SQL Server queries for CRM persistence with a focus on performance and data accuracy. Delivered work within a distributed Scrum team using Jira workflows, sprint planning/reviews, and QA validation. Maintained code quality and version control with Bitbucket.
Fullstack Developer at Independent Developer
June 1, 2024 - June 21, 2024Contributed to the development of a custom CRM platform for an auto parts sales company in the U.S., delivering features for inventory management, customer tracking, and order flow. Handled both front-end and back-end tasks using Angular 18, Vue 3, and NestJS, implementing dynamic components and RESTful APIs. Worked within a distributed Agile team under the SCRUM framework, taking tickets from JIRA, developing features, and collaborating with testers for validation. Wrote SQL queries and managed data persistence using SQL Server with focus on performance and accuracy. Maintained code quality and version control using Bitbucket and participated in sprint planning and reviews.
Fullstack Developer at Independent Developer
June 1, 2024 - June 22, 2024Contributed to the development of a custom CRM platform for an auto parts sales company in the U.S., delivering features for inventory management, customer tracking, and order flow. Handled both front-end and back-end tasks using Angular 18, Vue 3, and NestJS, implementing dynamic components and RESTful APIs. Worked within a distributed Agile team under SCRUM, taking tickets from JIRA, developing features, and collaborating with testers for validation. Wrote SQL queries and managed data persistence using SQL Server, focusing on performance and accuracy in CRM-related data. Maintained code quality and version control using Bitbucket, and participated in sprint planning and reviews with the international team.
FULLSTACK DEVELOPER at INDEPENDENT DEVELOPER
June 1, 2024 - June 15, 2024Contributed to the development of a custom CRM platform for an auto parts sales company in the U.S., delivering features for inventory management, customer tracking, and order flow. Handled both front-end and back-end tasks using Angular 18, Vue 3, and NestJS, implementing dynamic components and RESTful APIs. Worked within a distributed Agile team under the SCRUM framework, taking tickets from JIRA, developing features, and collaborating with testers for validation. Wrote SQL queries and managed data persistence using SQL Server, focusing on performance and accuracy in CRM-related data. Maintained code quality and version control using Bitbucket, and participated in sprint planning and reviews with the international team.
Senior Software Developer (Full Stack) at Towa Software
March 1, 2023 - June 1, 2024Led development of web solutions for a U.S.-based solar panel facility management company, optimizing REST API services and improving platform efficiency. Expanded the company’s e-commerce platform from B2B to B2C and improved conversion rates. Implemented caching and load balancing to reduce server response times and streamlined checkout by integrating third-party payment gateways. Collaborated with UI/UX to improve usability and user engagement.
Senior Software Developer (Fullstack) at Towa Software
March 1, 2023 - June 1, 2024Led the development of web solutions for a U.S.-based solar panel facility management company, optimizing REST API services and increasing platform efficiency by 15%. Spearheaded enhancements to the company’s e-commerce platform, expanding from B2B to B2C, which boosted conversion rates by 20%. Implemented advanced caching strategies and load balancing, reducing server response time by 30%. Coordinated with UI/UX designers to improve the user interface and overall user engagement. Integrated third-party payment gateways to streamline the checkout process and increase sales.
Senior Software Developer (Fullstack) at Towa Software
March 1, 2023 - June 1, 2024Led the development of web solutions for a U.S.-based solar panel facility management company, optimizing REST API services, resulting in a 15% increase in platform efficiency. Spearheaded enhancements to the company’s e-commerce platform, expanding it from B2B to B2C, boosting conversion rates by 20%. Implemented advanced caching strategies and load balancing, reducing server response time by 30%. Coordinated with UI/UX designers to improve the user interface, enhancing overall user engagement. Integrated third-party payment gateways, streamlining the checkout process and increasing sales.
SENIOR SOFTWARE DEVELOPER (FULLSTACK) at TOWA SOFTWARE
March 1, 2023 - June 1, 2024Led the development of web solutions for a U.S.-based solar panel facility management company, optimizing REST API services, resulting in a 15% increase in platform efficiency. Spearheaded enhancements to the company’s e-commerce platform, expanding it from B2B to B2C, which boosted conversion rates by 20%. Implemented advanced caching strategies and load balancing, reducing server response time by 30%. Coordinated with UI/UX designers to improve the user interface, enhancing overall user engagement. Integrated third-party payment gateways, streamlining the checkout process and increasing sales.
Senior Software Developer (Full Stack) at 3Pillar Global
July 1, 2021 - March 1, 2023Built full stack solutions for a high-traffic insurance platform serving thousands of daily users across multi-regional teams under Scrum. Led migration of legacy systems to a microservices architecture to improve scalability and maintainability. Automated CI/CD deployment pipelines to reduce deployment times and improved overall system performance and user experience.
Senior Software Developer (Fullstack) at 3Pillar Global
July 1, 2021 - March 1, 2023Developed full stack solutions for a high-traffic insurance platform, collaborating with multi-regional teams across the USA, India, and Latin America using SCRUM methodologies. Enhanced system performance and user experience for thousands of daily users. Led the migration of legacy systems to a microservices architecture improving system scalability and maintainability. Automated deployment pipelines using CI/CD tools, reducing deployment times by 40%.
Senior Software Developer (Fullstack) at 3Pillar Global
July 1, 2021 - March 1, 2023Developed full stack solutions for a high-traffic insurance platform, working closely with multi-regional teams using SCRUM methodologies. Enhanced system performance and user experience for a client serving thousands of daily users. Led the migration of legacy systems to microservices architecture, improving system scalability and maintainability. Automated deployment pipelines using CI/CD tools, reducing deployment times by 40%.
SENIOR SOFTWARE DEVELOPER (FULLSTACK) at 3PILLAR GLOBAL
July 1, 2021 - March 1, 2023Developed full stack solutions for a high-traffic insurance platform, working closely with multi-regional teams (USA, India, Latin America) using SCRUM methodologies. Enhanced system performance and user experience for a client serving thousands of daily users. Led the migration of legacy systems to a microservices architecture, improving system scalability and maintainability. Automated deployment pipelines using CI/CD tools, reducing deployment times by 40%.
Full Stack Developer at Heroma Consulting
March 1, 2018 - July 1, 2021Participated in requirements meetings with clients and development and deployment of ERP, CRM, e-commerce, protected content sites, subscription plans, hybrid mobile applications, and customized projects for national and US companies. Managed project deployments on client infrastructure and own CPC platform. Negotiated resources, development stack, delivery times, and infrastructure with clients. Upgraded Angular versions from v6 to v12 in existing projects. Developed SQL reports using stored procedures and handled financial and fiscal administration of the organization.
Full Stack Developer at Heroma Consulting
March 1, 2018 - July 1, 2021Conducted requirements meetings with clients; developed and deployed ERP, CRM, eCommerce, protected content sites, subscription plans, hybrid mobile apps, and customized projects for national and US companies. Managed project deployment on client infrastructure and proprietary CPC platform. Negotiated resources, development stack, delivery timing, and infrastructure with clients. Upgraded Angular versions from v6 to v12 in existing projects. Developed SQL reports using stored procedures. Managed financial and fiscal administration within the organization.
FULL STACK DEVELOPER at HEROMA CONSULTING
March 1, 2018 - July 1, 2021Conducted requirements meetings with clients, developed and deployed ERP, CRM, ECOMMERCE, protected content sites, subscription plans, hybrid mobile applications, and customized projects for national and US companies. Deployed projects on client’s infrastructure and own CPC platform. Negotiated resources, development stack, time delivery, and infrastructure with clients. Upgraded Angular versions in previously developed projects (from v6 to v12). Created SQL reports using stored procedures. Managed financial and fiscal administration of the organization.
Web Developer at Indigo Smart Software Development
December 1, 2016 - March 1, 2018Developed features and maintained the Mundo Joven Travel website as part of the staff development team. Held requirements meetings with clients and worked on web, desktop, and mobile application projects across business lines. Requested travel information from Backend teams via HTTP Requests and REST APIs. Developed the Mundo Joven mobile website and created landing pages.
Web Developer at Indigo Smart Software Development
December 1, 2016 - March 1, 2018Developed functions and maintained Mundo Joven Travel website as part of the in-house development team. Conducted client requirements meetings and developed web, desktop, and mobile app projects for various business lines. Managed backend data requests via HTTP requests and REST APIs. Developed mobile website and landing pages.
WEB DEVELOPER at INDIGO SMART SOFTWARE DEVELOPMENT
December 1, 2016 - March 1, 2018Developed functions and maintained Mundo Joven Travel website as part of the staff development team. Conducted requirements meetings with clients and developed web, desktop, and mobile application projects for business lines. Made requests to the Backend team to get all travel information via HTTP Requests and REST APIs. Developed Mundo Joven mobile website and landing pages.
Analyst Developer (Full Stack) at IMSS PROSPERA
January 1, 2015 - September 1, 2016Developed, modernized, and maintained medical and administrative systems used nationwide across hospitals and medical units. Wrote SQL queries to extract beneficiary information from a very large dataset and built internal systems to manage central unit and medical event information. Delivered technical training to medical and nursing staff.
Analyst Developer (Fullstack) at IMSS Prospera
January 1, 2015 - September 1, 2016Developed, renovated, and maintained medical and administrative systems used nationwide spanning 80 hospitals and over 400 medical units. Provided technical training for medical and nursing staff. Worked on internal projects to manage central unit and medical information events. Composed SQL queries to retrieve data from a large database with over 13 million records.
Analyst Developer (Fullstack) at IMSS Prospera
January 1, 2015 - September 1, 2016Developed, renovated, and maintained medical and administrative systems used nationwide across hospitals and medical units. Provided technical training to medical and nursing staff. Developed internal projects managing unit and medical data events. Performed SQL queries on large databases with over 13 million records.
ANALYST DEVELOPER (FULLSTACK) at IMSS PROSPERA
January 1, 2015 - September 1, 2016Developed, renovated, and maintained medical and administrative systems used nationwide (80 hospitals and more than 400 medical units). Provided technical training for medical and nursing staff. Developed internal projects to manage all central unit and medical information events. Executed SQL queries to retrieve specific information about unit beneficiaries (database with more than 13 million records).
Web Developer at IT Marketing
May 1, 2014 - December 1, 2014Developed and maintained websites and e-commerce platforms for high-profile clients including Odin Dupeyron and Intercam Bank. Created internal projects to manage leads and landing pages.
Web Developer at IT Marketing
May 1, 2014 - December 1, 2014Developed and maintained websites and eCommerce platforms for notable clients, including Odin Dupeyron and INTERCAM bank. Developed internal projects to manage leads and landing pages.
WEB DEVELOPER at IT MARKETING
May 1, 2014 - December 1, 2014Developed and maintained websites and ecommerce platforms for clients such as Odin Dupeyron and INTERCAM bank. Developed internal projects to manage Leads and Landing pages.
Web Developer at Grupo Impresores
August 1, 2013 - February 1, 2014Managed development and maintenance of the company website including new functionalities.
Web Developer at Grupo Impresores
August 1, 2013 - February 1, 2014Developed and maintained the company’s website along with new functionalities.
WEB DEVELOPER at GRUPO IMPRESORES
August 1, 2013 - February 1, 2014Developed and maintained the company's website, as well as new functionalities.
Education
Bachelor's degrees in Computer Systems Engineering at TESCI
September 20, 2009 - February 3, 2014Bachelor’s at Cuautitlán Izcalli Higher Studies Technological Institute
January 1, 2009 - December 31, 2013Bachelor’s at Cuautitlán Izcalli Higher Studies Technological Institute
January 1, 2009 - December 31, 2013Bachelor’s at Cuautitlán Izcalli Higher Studies Technological Institute
January 1, 2009 - December 31, 2013Bachelor's Degree in Computer Systems Engineering at Cuautitlán Izcalli Higher Studies Technological Institute
January 1, 2009 - January 1, 2013Qualifications
Industry Experience
Computers & Electronics, Software & Internet, Education, Energy & Utilities, Financial Services, Government, Healthcare, Manufacturing, Professional Services, Non-Profit Organization, Transportation & Logistics, Retail, Travel & Hospitality
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
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