
Jose Navalon
Verified Expert in Engineering
Software Developer
Eindhoven, Netherlands
Toptal member since July 20, 2018
Jose is a seasoned senior back-end developer with a master's in computer science. He has over a decade of expertise in back-end software engineering, microservices architecture, cloud computing (AWS, Azure, GCP), and high-performance systems. Jose is well-versed in Node.js and Java, developing and optimizing scalable, secure, and efficient back-end solutions. Jose consistently demonstrates expertise in implementing DevOps best practices and optimizing API performance and reliability.
Portfolio
Experience
- Java - 15 years
- NoSQL - 8 years
- Agile - 8 years
- Node.js - 6 years
- AngularJS - 6 years
- Spring Boot - 5 years
- Docker - 4 years
- Angular - 4 years
Preferred Environment
Node.js, JavaScript, TypeScript, AWS IoT, Python
The most amazing...
...project I've worked on is a diagnosis machines solution, using big data and microservice architecture, including the solution-matching core algorithm.
Work Experience
Senior Full-stack Developer
Advertise Purple
- Developed and maintained Node.js microservices in JavaScript/TypeScript.
- Managed AWS infrastructure (EC2, ECS, SNS, SQS, SES, IAM, S3) with Terraform.
- Led CI/CD pipeline automation, reducing deployment time by 40%.
- Worked with MySQL, Amazon Redshift, and Elasticsearch to enhance data search efficiency.
Senior Software Engineer
Tokeny
- Designed and developed scalable Node.js microservices using JavaScript/TypeScript.
- Implemented Smart Contracts on Ethereum, Polygon, and Avalanche.
- Integrated Ethers.js and Web3.js for blockchain interactions.
- Optimized AWS cloud infrastructure (ECS, SNS, SQS, Lambda) using Terraform, reducing cloud costs by 30%.
- Enhanced PostgreSQL and MongoDB query performance, achieving 50% faster response times.
Senior Software Engineer
Football Index
- Built services using Kotlin, Micronaut, Java, and Spring Boot.
- Integrated with Nasdaq FIX and ITCH protocols for financial transactions.
- Managed AWS cloud infrastructure (EC2, SNS, SQS, Lambda, RDS, SES) with Terraform.
- Optimized PostgreSQL, MongoDB, and Elasticsearch queries for faster data retrieval.
Senior Software Engineer
ASML Holding
- Created enterprise-level services using Java + Spring Boot.
- Spearheaded API performance improvements, reducing latency by 35%.
- Designed and developed the solution as a team member, focusing on designing and implementing the main code services (content gateway service, expert knowledge worker, user experience service, and SDT front-end UI).
- Implemented using Spring Boot 2; made extensive use of Spring Cloud and Kafka.
- Ensured that the suite was a success. It currently runs on several main customer sites: Samsung Korea, Samsung China, SK Hynix, and Intel.
- Used Kafka to store temporarily the massive data coming from the machines which improved the diagnosis process and the UI timeline experience by 85%.
- Improved the matching algorithm so that it is able to provide a solution for a failed task in 400 milliseconds, among 300,000 possible solutions, and an average of 70 symptoms per expert rule/archived fault.
Senior Software Engineer
SPS Commerce
- Created with a team, a message communication broker, and an application to receive/send messages from/to EDI to/from customer systems.
- Developed the part that focused on the main message processor service, output dispatcher service, and the administration web application.
- Implemented Spring Boot 1.x and extensively used the Netflix ecosystem to run multiple instances and provide fault tolerance and high performance.
- Developed, in a team, the solution, focusing on creating new workflow activities and new transformation microservices to transform data dynamically from a data source (database, Excel files, and so on) into a customizable ontology output (XML, JSON).
- Built the remanufacturing project, PREMANUS, an application to show and modify data with publisher/subscriber functionality. It also provides REST web services.
- Designed and developed the solution, focusing on transforming source data and notification of data changes to other subscribed remote applications.
- Designed and developed solutions to create new add-ins and deliver enhanced communication modules for the message broker system.
- Enabled the message communication broker to use a micro-service approach, allowing the running of multiple instances of every component and providing isolation from each other.
- Introduced an in-memory NoSQL Redis database for the queue cache, improving performance by 50%.
Experience
Football Index
T-REX Platform
https://tokeny.com/t-rex-platform/Designed and developed scalable Node.js microservices using
JavaScript/TypeScript, PostgreSQL, MongoDB databases, and AWS infrastructure.
T-Rex Engine
https://tokeny.com/t-rex-engine/I contributed to an award-winning fintech platform that offers compliant tokenization using the open-source ERC-3643 token standard and delivers sophisticated white-label solutions for financial institutions. The enterprise-grade platform streamlines fragmented on-chain and off-chain workflows by integrating essential services, enabling seamless issuance, transfer, and management of tokenized securities.
Designed and implemented scalable Node.js microservices using JavaScript/TypeScript, integrating Ethers.js and Web3.js for blockchain interactions. Deployed infrastructure on AWS and managed data with PostgreSQL and MongoDB to ensure high availability and performance.
Advertise Purple
http://www.advertisepurple.com/Engineered and maintained scalable Node.js microservices using JavaScript/TypeScript, which were deployed on AWS infrastructure. Managed and optimized data pipelines with MySQL, Amazon Redshift, and Elasticsearch to support high-performance analytics and real-time insights.
IP Digital NL Signage
https://ipdigital.nl/digital-signage-software/• Smart Publication Service
• Node.js development
• MongoDB database management
• RabbitMQ queues
Alphatronsignage.com
https://www.alphatronsignage.com/digitale-informatievoorziening-voor-passagiers/reisinformatieIn addition, we provide comprehensive transfer information so passengers can effortlessly plan and transfer to other forms of public transport. Whether it’s a bus, train, metro, ferry, or plane, our system provides detailed information on departure times and the best routes to travel seamlessly from one vehicle to another.
SPS Commerce EDI
https://www.spscommerce.com/products/fulfillment/edi/Education
Master of Science Degree in Computer Science
Valencia Polytechnic University - Valencia, Spain
Certifications
Machine Learning: Recommendation Systems in ML
MIT Professional Education
Skills
Libraries/APIs
Node.js, Hystrix, React, Apigee, Web3.js
Tools
AWS SDK, Git, Travis CI, Puppet, Vagrant, Bamboo, Confluence, Apache Maven, Gradle, GitHub, GitLab, Bitbucket, Jenkins, Jira, Trello, Sequelize, Mongoose, Apache ZooKeeper, Eureka, Zuul, RabbitMQ, IntelliJ IDEA
Languages
Java, JavaScript, TypeScript, Go, Python, C#.NET, C++, Kotlin
Frameworks
Angular, Spring, Spring Boot, AngularJS, Koa, Express.js, Angular Material, Micronaut
Paradigms
Agile, Concurrent Programming
Platforms
Windows, Linux, MacOS, AWS Lambda, Docker, Kubernetes, Java EE (Jakarta EE), Netflix, Oracle, Apache Kafka, Firebase, Heroku, Amazon Web Services (AWS), Visual Studio Code (VS Code), Blockchain, Mender, Azure, AWS IoT
Storage
MongoDB, NoSQL, PostgreSQL, MySQL, SQL Server 2016, SQL Server 2012, MySQL/MariaDB, Redis, Amazon S3 (AWS S3), Microsoft SQL Server, Redshift, Elasticsearch
Other
Spring Cloud, Apache Cassandra, Cloud, Axios, Streaming Data, Software Architecture, Software Design, Ethers.js, Web3, Amazon Redshift, Machine Learning, Recommendation Systems
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