Jefferson Fusco Ramos

Montijo, Lisbon, Portugal
+351 910 676 357
jefferson.f.ramos@hotmail.com
https://www.linkedin.com/in/jefferson-f-ramos/
https://github.com/jeffersonframos

Profile

Senior Java Developer with 10+ years of experience building backend systems with Java 21, Spring Boot and Kafka in high-throughput, low-latency microservices environments. Experience in financial trading data platforms and serverless architectures on AWS. Tech Lead experience (team of 5 developers), plus full stack delivery with React and Angular.

Skills

Backend: Java 8, 11, 17, 21, Spring Boot, Spring MVC/Data/Security, Hibernate, Hibernate Envers, Quarkus
Messaging and Data: RabbitMQ, Kafka, PostgreSQL, Cassandra, DynamoDB, Liquibase/Flyway
Cloud and DevOps: AWS, Docker, Kubernetes, Terraform, Jenkins, ArgoCD
Frontend: Angular, React, TypeScript
Others: Python, Cucumber/Selenium, Git, Flutter
Languages: Portuguese (Native), English (C1)

Professional Experience

Senior Java Developer
Hexa Consulting
12/2025 - current

Platform to manage short to intermediate term trading, serving portfolio management platforms with clean and normalized data for assets.

  • Develop full stack features in a microservices environment, focusing on high throughput and low latency
  • Integrate and normalize data from multiple sources

Tech stack: Java 21, Spring Boot, Kafka, PostgreSQL, Kubernetes, ArgoCD, AWS, React

Senior Java Developer
BOOST-IT
06/2022 - 11/2025
Philip Morris International (late 2025)

Worked in the team responsible for restrictions applied to customer orders depending on their country/region, order history and product quantity limit throughout a defined timeframe

  • Developed backend services as AWS Lambdas using Quarkus
  • Worked with DevOps engineers on infrastructure management, using Terraform for AWS resources provisioning

Tech stack: Java 21, Quarkus, AWS, DynamoDB, Terraform, Git

A-to-Be - Brisa Group (2024 - 2025)

Platform to manage automatic tolling, including devices rental and automatic billing.

  • Managed device stock and shipping process

Tech stack: Java 21, Spring Boot, Kafka, Docker, Jenkins, AWS

Emergn (2022 - 2024)

Platform dedicated to datacenter management, including on site access, power consumption, power sources (renewable or not), control from sensors (humidity, temperature), management of VLANs and cloud access for servers, server maintenance schedule

  • Developed backend and frontend (70/30 split)
  • Assumed team leader position when needed, planning sprints, team workload, release planning
  • Conducted code reviews

Tech stack: Java 17, Spring Boot, PostgreSQL, Liquibase, Hibernate, Cassandra, Angular, Jenkins, AWS

Senior Consultant - Java Developer
OnRising
06/2021 - 06/2022

Project to manage integration between public and private retirement and pension funds

  • Built platform integrations, using REST and SOAP
  • Led a team of 5 developers: managed team members, planned sprint scopes, ran code reviews and trained junior developers

Tech stack: Java 8, Groovy, Spring Boot, Hibernate, Docker, Kubernetes, AWS, Jenkins

Senior Java Developer
VAKT Portugal Unipessoal Ltda.
09/2019 - 05/2021

Digital post-trade platform for physical commodities trading, used by energy and commodities market participants to match, confirm and manage trades

  • Built REST APIs with Spring Boot and PostgreSQL
  • Implemented database audit using Hibernate Envers

Tech stack: Java 11, Spring Boot, PostgreSQL, Flyway, React, AWS, RabbitMQ

Senior Consultant - Java Developer
Altran Technologies, SA
04/2019 - 09/2019

Developed and maintained a custom framework used in automation tests routines

  • Worked closely with QA teams to ensure availability of capabilities and functionalities to the test framework
  • Unified mobile and web drivers into the test framework, allowing teams to run tests across different platforms

Tech stack: Java 8, Selenium, Cucumber, SVN

Full Stack and Mobile Developer
PAGVIA Tecnologia da Informação LTDA-ME - side project
02/2015 - current

Platform to manage and migrate food vouchers from printed paper to magnetic cards

  • Full stack developer; also built apps for Ingenico and PAX POS terminals (in C)
  • Mobile development for Android and iOS using Flutter

Tech stack: Java, Spring Boot, PostgreSQL, Angular, Flutter, C (POS)

Education

Technologist in Information Technology
FATEC Lins - Brazil
06/2011