Madalina D.

Java Software Developer

Avatar placeholder
Portugal

Experience

Aug 2023 - Present
2 years 5 months

Java Software Developer

COMO GLOBAL S.A.

  • At Como Group, a leading financial technology firm, played a key role in the design, development, and optimization of innovative financial solutions.
  • Developed and enhanced high-performance RESTful APIs, improving scalability and reliability for international financial operations.
  • Optimized system performance and security for cross-border transactions, significantly improving transaction speed and platform stability.
  • Integrated AI-assisted development practices, leveraging tools such as Claude Code, Codex CLI, and Gemini CLI to accelerate development, enhance code quality, and automate routine engineering tasks.
  • Conducted research and implementation of AI CLI tools and MCPs to explore how agent-based AI systems can augment backend processes and improve development automation.
  • Collaborated with cross-functional teams (product, DevOps, QA, and data) to identify technical improvements and enhance the platform’s overall functionality and user experience.
  • Resolved complex technical challenges with innovative backend solutions, increasing system reliability and processing efficiency.
  • Tech stack: Java 17–21, Spring Boot, Hibernate, Redis, Kafka (Pub/Sub), PostgreSQL, Docker & Kubernetes, AWS (S3, CloudWatch, IAM), OpenAPI, Swagger, GitLab, JUnit 5, Mockito, Jira, Confluence, Claude Code, Codex CLI, Gemini CLI, Agile (Kanban methodology).
Jan 2022 - Jul 2023
1 year 7 months

Java Software Developer

Edenred Digital Center

  • Part of the UTA development team contributing to the design and maintenance of core applications that support fleet management, fuel payments, and transport-related services using the UTA Card.
  • Developed and maintained Java microservices to improve system modularity and reduce inter-component dependencies.
  • Worked on microservices implemented with Spring WebFlux and Project Reactor (Mono/Flux).
  • Implemented new features aligned with business specifications, enhancing the functionality and usability of the platform.
  • Collaborated with QA teams to identify, troubleshoot, and resolve defects, improving product stability.
  • Refactored legacy code to increase reliability, scalability, and maintainability across key modules.
  • Implemented comprehensive unit testing (achieving 90% code coverage), reducing production issues by 30%.
  • Optimized SQL queries (Oracle-compatible syntax) to improve backend performance and scalability.
  • Maintained accurate and up-to-date technical documentation for assigned applications.
  • Tech stack: Java 11 & 17, Spring Boot, Hibernate, Liquibase, Oracle SQL, Docker, Kubernetes, Jenkins (CI/CD pipelines), Azure Cloud, ELK (Elasticsearch, Logstash, Kibana), Bitbucket, RabbitMQ, JUnit 5, Mockito, SonarQube, Jira, Confluence, Agile (Scrum methodology).
Sep 2020 - Jan 2022
1 year 5 months

Jr. Full Stack Developer

Codecool

  • Gained hands-on experience in designing and implementing web applications using Java, Spring Boot, React, and PostgreSQL as part of Codecool’s Full Stack Development Program.
  • Contributed to the development of an e-commerce platform built on a microservices architecture and deployed on Microsoft Azure Cloud.
  • Designed and developed backend services using Java and Spring Boot, integrated with Hibernate/JPA for persistence.
  • Implemented frontend components with React, ensuring responsive and user-friendly interfaces.
  • Deployed and managed the application on Azure Cloud following containerized deployment practices with Docker.
  • Integrated alternative payment APIs to provide merchants with flexible transaction options.
  • Utilized Git for version control and collaborated in an agile team environment to deliver project milestones.
  • Tech stack: Java 11, Spring Boot, Hibernate, Docker, HTML, CSS, JavaScript, React, Jenkins, Azure Cloud, PostgreSQL, Swagger.
Dec 2014 - Sep 2020
5 years 10 months

Business Data Analyst

Zola Food International

  • Collected, analyzed, and interpreted operational data across multiple restaurant and hospitality businesses to support strategic decision-making.
  • Collaborated with restaurant managers and finance teams to identify trends, forecast demand, and optimize resource allocation.
  • Designed SQL-based data queries and spreadsheets for performance tracking and financial reporting.
  • Supported marketing and pricing strategies through data-driven insights on customer behavior and seasonal trends.

Summary

A passionate Software Engineer with a strong focus on clean, maintainable code and continuous learning. Experienced in building and maintaining RESTful APIs using Java, Spring Boot, Spring WebFlux and Hibernate, with solid knowledge of SQL databases such as PostgreSQL and Oracle SQL. Skilled in translating business requirements into scalable technical solutions, writing clear specifications, and performing detailed code and design reviews.

I actively leverage AI-assisted development tools such as Claude Code, Codex CLI and Gemini to enhance productivity, improve code quality, and optimize workflows. I also conducted research on AI CLI tools and agent-based systems, exploring how to apply AI reasoning and task orchestration to strengthen development processes and integrate intelligent automation into projects.

Skills

  • Java 8-21
  • Nodejs (Js/ts)
  • Springboot
  • String Webflux
  • Project Reactor (Mono/flux)
  • Hibernare/jpa
  • Openapi
  • Junit 5
  • Postgresql
  • Oracle Sql
  • Apache Kafka
  • Rabbitmq
  • Redis
  • Aws
  • Azure Cloud
  • Jenkins (Ci/cd Pipelines)
  • Elk
  • Doker & Kubernetes
  • Agile Methodology, Scrum, Kanban
  • Git
  • Claude Code
  • Codex Cli
  • Gemini Cli

Languages

English
Advanced
Spanish
Advanced
Portuguese
Advanced

Education

Bucharest University of Economic Studies

BA in Marketing · Marketing · Bucharest, Romania

Need a freelancer? Find your match in seconds.
Try FRATCH GPT
More actions

Similar Freelancers

Discover other experts with similar qualifications and experience

Luís P.
Luís P.

Software Developer

View Profile
Cristian S.
Cristian S.

Team Lead Mobile Native Apps

View Profile
Bruno miguel C.
Bruno miguel C.

Full Stack Developer

View Profile
Mathias D.
Mathias D.

Independent contractor

View Profile
Timo R.
Timo R.

Expert Software Developer

View Profile
Martin G.
Martin G.

Product Management for Medical Portal

View Profile
Thomas H.
Thomas H.

Senior MLOps, DevOps Engineer

View Profile
Anton K.
Anton K.

Head of Technical Overall Integration NSC / Hadoop Cloud Development

View Profile
Rodrigo H.
Rodrigo H.

Data Engineer and Founder

View Profile
Celso K.
Celso K.

SAP Commerce Cloud FullStack Developer

View Profile
Cesar S.
Cesar S.

Lead Cloud Engineer

View Profile
Alex S.
Alex S.

Senior-Softwareentwickler

View Profile
Milad H.
Milad H.

Implementation & Development

View Profile
Benedek G.
Benedek G.

CTO/CISO

View Profile
Patrick W.
Patrick W.

AI Software Engineer

View Profile
Dariusz K.
Dariusz K.

Business System Analyst

View Profile
Carlos M.
Carlos M.

Migration Zend Framework 2 /Laminas

View Profile
Andreas K.
Andreas K.

Senior Developer

View Profile
Abdelmajid D.
Abdelmajid D.

Leader, Architect and Senior Developer

View Profile
Nandini V.
Nandini V.

Senior Software Developer

View Profile
Marcel M.
Marcel M.

Cloud-Architect, Senior Solution Architect, Senior Software-Engineer

View Profile
Michal B.
Michal B.

Senior Golang Engineer

View Profile
Oliver B.
Oliver B.

Senior Software Architect

View Profile
Sandeep G.
Sandeep G.

Software Engineer

View Profile
Fady K.
Fady K.

Senior Software Developer / Tech Lead

View Profile
Serge K.
Serge K.

MLOps (machine learning operations)

View Profile
Antonio C.
Antonio C.

Data Analyst Intern

View Profile
Timon R.
Timon R.

Database Developer – Research Project – Healthcare Billing

View Profile
Satya V.
Satya V.

Lead Developer

View Profile
Rüdiger S.
Rüdiger S.

Full-Stack Software Engineer / Consultant for Digitalization

View Profile