Ivan is available for hire
Hire IvanIvan Alejandro Garcia Porcel
Verified Expert in Engineering
Back-end Developer
Cochabamba, Cochabamba Department, Bolivia
Toptal member since August 31, 2022
Bio
Ivan is a back-end software engineer with 10 years of experience working on Java-related technologies and developing from monolithic applications to microservices in multiple industries, such as healthcare, automotive, and antivirus software. He can assimilate new ideas efficiently and deliver thoughtful solutions to complex problems. Ivan enjoys participating in hackathons and competitive programming contests.
Portfolio
Mumo Systems, LLC
Java, Spring Boot, Full-stack, Git, Docker, Amazon Web Services (AWS)...
Zoox (via Online Freelance Agency)
Kotlin, Spring Boot, PostgreSQL, Python, Cloud Computing
United Airlines (via Online Freelance Agency)
Java, Spring Boot, Amazon Web Services (AWS), Datadog, GitHub, Jira, Confluence...
Experience
- Java - 10 years
- REST - 5 years
- Spring Boot - 5 years
- Microservices - 4 years
- Amazon DynamoDB - 4 years
- Elasticsearch - 4 years
- PostgreSQL - 4 years
- gRPC - 3 years
Preferred Environment
MacOS, IntelliJ IDEA, Apache Maven, Docker, Git
The most amazing...
...project I've worked on is a car assembly industry solution used by companies like Ford and Jaguar Land Rover.
Work Experience
Java Spring Boot Engineer
2024 - 2026
Mumo Systems, LLC
- Integrated a Jira Service Management application with 3rd-party applications.
- Designed and implemented a new feature to allow multi-tenant configuration and availability of different items associated with them.
- Fixed a performance issue when retrieving more than 10,000 items, which reduced the response time from 30 to 2 seconds.
Technologies: Java, Spring Boot, Full-stack, Git, Docker, Amazon Web Services (AWS), Databases, React, Jira REST API, Jira, Claude Code, AI Tools, Cloud Computing, Prompt Engineering, Performance Improvement, Scalability, System Integration
Software Engineer
2025 - 2025
Zoox (via Online Freelance Agency)
- Maintained, fixed, and developed an internal set of services that were in charge of orchestrating autonomous cars.
- Implemented a new feature to calculate the ETA (estimated time of arrival) of an autonomous car to a user's destination.
- Found and fixed an issue that affected a Kotlin service, which was consuming a Python service that was using a C++ library, and needed to go through different codebases and point the issue to the C++ team.
Technologies: Kotlin, Spring Boot, PostgreSQL, Python, Cloud Computing
Software Engineer
2023 - 2025
United Airlines (via Online Freelance Agency)
- Migrated functionality from a monolithic (Java 6 deployed to WebSphere) to a microservice architecture (Java 17, Spring Boot, and AWS); it included following best practices of unit and integration tests, CI/CD, and documentation.
- Integrated REST APIs with Datadog (logs and traces) and AWS services (i.e., Secrets Manager).
- Achieved zero Critical, Very High, High, and Medium vulnerability status for Veracode scans in multiple applications.
Technologies: Java, Spring Boot, Amazon Web Services (AWS), Datadog, GitHub, Jira, Confluence, Cloud Computing
Software Engineer
2023 - 2024
eBay (via Online Freelance Agency)
- Maintained, fixed, and developed an internal application composed of three microservices exposing REST and gRPC endpoints, using MongoDB and a specific set of batch jobs.
- Wrote integration and E2E tests, ensuring that functionality was covered from calling REST endpoints to storing proper information in MongoDB.
- Integrated a spring batch job to pull data from GitHub and push results into a REST endpoint from a microservice, which I also implemented.
Technologies: Java, Kotlin, Spring Boot, Spring Batch, Amazon Web Services (AWS), MongoDB, Cloud Computing
Software Engineer
2022 - 2023
Greenlight (via Online Freelance Agency)
- Migrated gRPC endpoints from a Node.js monolithic application to a Kotlin-based microservices architecture hosted in AWS and used by around 10 million users.
- Collaborated with the team to improve code and mutation test coverage in two different microservices using Mockito and Testcontainers.
- Maintained the existing Node.js monolithic application hosted in AWS and implemented new features.
Technologies: Kotlin, Spring Boot, MySQL, Amazon DynamoDB, Docker, Amazon Web Services (AWS), REST, gRPC, Testcontainers, Microservices Architecture, Kubernetes, JavaScript, Spring Cloud, Back-end, REST APIs, Databases, Spring, SQL, Cloud Computing
Java Software Engineer
2020 - 2022
Brightinsight (via Online Freelance Agency)
- Developed a Java library to add data extension capabilities to the existent PostgreSQL tables, supporting the creation of custom tables and indexing over columns.
- Followed the FHIR standard to implement three Dockerized microservices exposing REST and gRPC endpoints. Used PostgreSQL, Testcontainers, and Mockito for integration and unit tests.
- Improved performance of REST endpoints to support and process between one and two thousand concurrent transactions per minute by adding a Redis cache layer and the batch insert and update strategy.
Technologies: Java, Spring Boot, PostgreSQL, Liquibase, gRPC, REST, Hibernate, Mockito, Google Cloud, Docker, Testcontainers, Redis, Back-end, REST APIs, Databases, Spring, SQL, Cloud Computing
Semi-senior Software Developer and Junior Team Lead
2019 - 2021
Jalasoft
- Used DynamoDB to store information generated in large amounts over a frequent period.
- Built Elasticsearch queries to retrieve data at specific intervals, allowing for the building of a response with pagination, sorting, and aggregation capabilities.
- Implemented the microservices in an event-driven architecture exposing API using gRPC and REST endpoints.
Technologies: Java, Dropwizard, Amazon DynamoDB, Elasticsearch, PostgreSQL, Microservices, Hibernate, Mockito, Testcontainers, Docker, Dagger 2, gRPC, REST, Back-end, REST APIs, Databases, Spring, SQL, Apache Kafka, Event-driven Architecture, Cloud Computing
Semi-senior Software Developer
2018 - 2019
Jalasoft
- Applied the UI/UX style guidelines using best practices with Sass, which also involved modifying the back end using Java.
- Added features to a desktop application implemented with C++ using the Qt library.
- Fixed a multi-thread functionality in a Qt-based application, allowing users to launch concurrent processes to modify images and videos.
Technologies: Java, SQL Server 2008, Sass, Qt, C++, Back-end, REST APIs, Databases, SQL
Software Development Team Lead
2015 - 2018
New Vision Data
- Designed and implemented a Java module to track, report, and locate assets and parts involved in the process of car assembly.
- Implemented ActiveMQ and WebSphere integration through a Camel server, allowing communication of a Java application with a Jaguar Land Rover custom system and improving productivity and response time in car material replenishment.
- Designed and implemented a distributed cache module in Java to support and store traffic among embedded ActiveMQ servers in monolithic applications, improving the number of transactions processed from twenty-five per second to two hundred per second.
Technologies: Java, Apache Struts 2, ActiveMQ, SQL Server 2008, Jakarta Server Pages (JSP), Camel, Back-end, Databases, SQL
Full-stack Developer
2014 - 2015
Litec S.R.L.
- Developed a geographic information system that provided real-time reports and maps based on user tweets with a determined topic and information obtained using Twitter API with Java, allowing users to visualize it on a web page using Google Maps.
- Integrated Google Maps with CartoDB and Mapbox to display the location of tweets across different states.
- Developed a system that provided visual and statistical reports based on information provided by public institutions. It was implemented using D3.js and NVD3.
Technologies: Java, JavaScript, AngularJS, D3.js, X (formerly Twitter) API, Mapbox, CartoDB, Back-end
Java Software Developer
2012 - 2014
Mojix
- Created and maintained an asset management system for car assembly industries and implemented it in Jaguar Land Rover, Ford, Subaru, and GETRAG facilities.
- Designed and implemented a module to horizontally scale a monolithic application; it added failover, load balancing, and health check capabilities for each monolithic server.
- Developed an installation tool using Java Swing to download and install needed files and programs to run a Tomcat-based application.
Technologies: Apache Struts 2, SQL Server 2008, Kodo, Swing, Java, Apache Tomcat, Back-end, Databases, SQL
Experience
Predicting Cryosphere Information Based on the User's Location
https://2018.spaceappschallenge.org/challenges/icy-glare/find-my-cryosphere/teams/cryoingdevs/project/As part of the Space Apps Challenge organized by NASA, my team and I developed a web application—finalist and global nominee—that lets users pick a location and learn about the parts of Earth's cryosphere that impact that location.
In 2016, the city of La Paz, Bolivia, suffered a problem of lack of water. Our team wanted to prevent this from happening again by using data to predict the melting behavior in nearby mountain ranges. As the cryosphere shows us the frozen areas on our planet, we decided to use the data provided by NASA to determine the changes in the freeze zones in a region and to predict the effects of global melting.
In 2016, the city of La Paz, Bolivia, suffered a problem of lack of water. Our team wanted to prevent this from happening again by using data to predict the melting behavior in nearby mountain ranges. As the cryosphere shows us the frozen areas on our planet, we decided to use the data provided by NASA to determine the changes in the freeze zones in a region and to predict the effects of global melting.
VIPRE Cloud
https://vipre.com/products/endpoint-security/end-point-cloud/VIPRE Cloud is a cloud-based cybersecurity solution developed by VIPRE Security, designed to protect businesses from various online threats such as malware, ransomware, phishing attacks, and viruses. I was a back-end developer, maintaining and developing new features exposing REST and gRPC endpoints using AWS Cloud Service.
Greenlight
https://greenlight.com/This is a mobile application that offers a financial service aimed at families, offering a debit card and money management platform for children. I was a back-end developer on the risk team. I migrated rest and gRPC endpoints from a monolithic Node.js application to a cloud-based Kotlin microservices application.
Education
2020 - 2020
Diploma in Higher Education
Universidad Católica Boliviana - Cochabamba, Bolivia
2008 - 2013
Bachelor's Degree in Systems Engineering
Universidad Católica Boliviana - La Paz, Bolivia
Certifications
JULY 2024 - PRESENT
Supervised Machine Learning: Regression and Classification
Coursera
Skills
Libraries/APIs
REST APIs, D3.js, Liquibase, RESTEasy, X (formerly Twitter) API, React, Jira REST API
Tools
IntelliJ IDEA, Claude Code, ActiveMQ, Apache Maven, Git, Apache Tomcat, GitHub, Jira, Confluence
Languages
Java, JavaScript, SQL, Sass, C++, Kotlin, Java 8, Java 11, Python
Frameworks
Mockito, Spring Boot, gRPC, Spring, Apache Struts 2, Swing, AngularJS, Jakarta Server Pages (JSP), Qt, Dropwizard, Hibernate, Dagger 2, Camel, Spring Batch
Paradigms
Microservices, REST, Microservices Architecture, Event-driven Architecture
Platforms
Docker, MacOS, Amazon Web Services (AWS), Kubernetes, Mapbox, Apache Kafka
Storage
SQL Server 2008, Amazon DynamoDB, Elasticsearch, PostgreSQL, Databases, Google Cloud, MySQL, Redis, CartoDB, MongoDB, Datadog
Other
Software Development, Competitive Programming, Testcontainers, Spring Cloud, Back-end, AI Tools, Cloud Computing, Higher Education, Kodo, Supervised Machine Learning, Argo CD, Full-stack, Prompt Engineering, Performance Improvement, Scalability, System Integration
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