Gilberto Santos
Dublin,Ireland
Summary
Software architect with deep expertise in back-end technologies, including Java, Node.js, and Python, alongside proficiency in front-end frameworks such as React.js and Next.js. Strong leadership in architectural design, specializing in microservices and event-driven architecture to deliver scalable cloud-native solutions. Skilled in managing cloud infrastructure across AWS, GCP, and Azure, ensuring robust security and performance optimization.
Overview
19
19
years of professional experience
8
8
years of post-secondary education
3
3
Certifications
Work history
Staff Software Engineer
Prove Identity
Dublin, Leinster
07.2025 - 12.2025
- Technical Leadership: Design and implementation of large-scale distributed systems, enhancing availability, scalability, latency, and security across Prove’s core platform, incorporating principles of risk management and fraud detection.
- Cross-Functional Collaboration: Partnered with product management, design, compliance, security, and operations teams to deliver technically robust, compliant, and user-focused solutions, demonstrating strong communication skills.
- System Architecture: Led end-to-end architecture and development of platform components and infrastructure, ensuring system efficiency and operational excellence through strategic thinking.
- Engineering Excellence: Mentored engineers across multiple teams, promoting high standards in system design, coding practices, testing, and deployment, fostering a data-driven culture.
- Operational Reliability: Provided actionable insights to improve platform reliability, observability, and overall performance in production environments, ensuring system reliability.
- Maintained and re-designed mission-critical services, improving system resiliency and reducing latency across key payment processing flows. Drove best practices in distributed system design, accelerating delivery while maintaining Prove’s standards for compliance and security.
- Built a culture of mentorship and continuous learning through code reviews, technical design sessions, and architecture workshops, contributing to team growth and technical excellence.
- Tech Stack: GoLang, Java, Node.js, TypeScript, React, AWS (MKS, ECR, EKS, DynamoDB, SNS/SQS), Kubernetes, Docker, Terraform, CI/CD, Clean Architecture, TDD, DDD, Monitoring/Observability (Splunk, Grafana, Prometheus).
Freelance as Subject Matter Expert Lecturer
University College Dublin
Dublin, IRELAND
09.2024 - 12.2025
- Facilitated lectures on web development with emphasis on front-end technologies, including HTML, CSS, JavaScript, Bootstrap, and elements of ReactJS.
- Assisted in creating interactive learning materials to improve student comprehension and retention.
- Supported students in developing practical projects and portfolios to highlight their skills.
Principal Software Engineer
Globalization Partners
Dublin, Leinster
05.2022 - 07.2025
- Architectural Leadership: Led architectural oversight and technical strategy for distributed, serverless microservices architecture, guiding engineering squads to scalable solutions. Drove transformation initiatives for seamless global operations, demonstrating strategic thinking.
- Mentorship: Key technical mentor to senior engineers, facilitating growth through hands-on guidance, knowledge sharing, and strategic architectural decisions, embodying ability to mentor.
- Collaborative Leadership: Worked directly with leadership, including the VP of Engineering, to influence decisions on critical technical initiatives, ensuring alignment with company growth objectives through effective communication skills.
- Architected event-driven, serverless applications using AWS, enabling global scale and demonstrating expertise in cloud infrastructure.
- Built reusable modules, code quality principles, and improved performance, contributing to data products and system reliability.
- Facilitated company-wide knowledge-sharing sessions on advanced technology topics like AWS Serverless, Clean Architecture, and CI/CD best practices.
- Tech Stack: Java 11, SpringBoot, Node, Nest, JavaScript, Typescript, React, AWS, Serverless, Restful API, Clean-Code, Hexagonal Architecture, TDD, DDD, JIRA, Docker, Git.
Freelance as Guest Lecture
Dublin Coding School
Dublin, IRELAND
01.2022 - 09.2024
- Led the design and delivery of engaging lectures, workshops, and hands-on exercises encompassing a broad spectrum of topics, including front-end and back-end development, databases, version control, and deployment strategies.
- Facilitated learning through theutilisation of programming languages such as JavaScript, PHP, HTML/CSS, and frameworks like React, Node.js, and Express.
Senior Software Engineer
TD Securities
Toronto, CAN
10.2020 - 05.2022
- Large-Scale Transformations: Led the modernisation of a legacy banking application, transitioning it from a monolithic structure to a microservices architecture, focusing on scalability.
- Architectural Oversight: Designed and implemented an end-to-end CI/CD pipeline to automate testing, deployment, and scaling, enhancing overall product delivery and system reliability.
- Strategic Initiatives: Collaborated with cross-functional teams to align system designs with business goals, ensuring scalability and maintainability through strategic thinking.
- Improved the user experience by designing an intuitive front-end with React.js and re-architecting backend services for improved performance, focusing on usability.
- Spearheaded the cloud migration of critical components to Azure, enhancing system scalability and security, demonstrating proficiency in cloud infrastructure.
- Tech Stack: Java 11, React, SpringBoot, C#, Restful API, Gradle, Jenkins, Sonar, Clean-Code, IntelliJ, JUnit, JIRA, Docker, Git, Azure Cloud.
App Tech Lead Engineer (VP)
Citibank
Dublin, IRELAND
07.2017 - 04.2020
- Technical Leadership: Led a global team of 10 engineers in maintaining and optimizing three of Citibank’s largest account service projects. As a tech lead, architected, and provided strategic input on architectural direction and system design, demonstrating technical leadership.
- Transformation and Scalability: Implemented a Continuous Integration (CI) pipeline and quality standards, improving product quality by 30% and enhancing system reliability.
- Large-Scale Solutions: Designed a Natural Language Processing (NLP) and OCR solution to streamline signature verification processes, enhancing efficiency in document management and demonstrating data processing capabilities.
- Promoted to VP position, helping the team by introducing innovative solutions in microservices, improving the performance and scalability of critical systems.
- Reduced maintenance costs through architectural improvements and approximately 100 development hours, showcasing strategic thinking and reliability.
- Tech Stacks: Java 8, SpringBoot, Hadoop, HDFS, Apache Spark, Cloudera, Impala, Kafka, MongoDB, Oracle DB, Restful API, Gradle, Jenkins, Sonar, CheckStyle, Clean-Code, JUnit, JIRA, uDeploy, TeamCity, Docker, Git, BitBucket.
Senior Software Engineer
IBM
Dublin, IRELAND
12.2015 - 06.2017
- Joined IBM Watson Health, contributing to an innovative, technically challenging project by leveraging expertise in Java and agile methodologies.
- Mastered development in agile environments and TDD, ensuring quality and timely delivery, demonstrating reliability.
- Balanced independent work with teamwork, driving project success through active collaboration and communication skills.
- Committed to continuous learning and improvement, fostering individual and team capabilities.
- Enhanced and programmed Java features for a web app serving 5 million users globally, focusing on scalability and user needs.
- Tech Stacks: Java 8, EJB, Selenium, Restful API, IBM Database, Maven, Jenkins, Sonar.
Senior FullStack JEE Consultant
Montreal
Brasilia, BRAZIL
08.2013 - 04.2014
- Pioneered an agile environment, leading knowledge sharing through presentations, demonstrating communication skills.
- Guided the team on JEE and agile best practices to keep their skills up to date, embodying ability to mentor.
- Championed a streamlined knowledge management system within the agile framework.
- Tech Stacks: JEE 6, JSF, JQuery, EJB3, Hibernate(JPA), JAX-RS, JSON, DB Oracle, JBoss, Git, Maven, Jenkins, Linux, Agile, Junit, Eclipse, JIRA, UML.
Senior Team Lead FullStack Architect JEE
Cast Group
Brasilia, BRAZIL
03.2013 - 08.2013
- Led a team, leveraging cutting-edge technology for project innovation and excellence, demonstrating technical leadership.
- Designed and implemented training programs, boosting team skills and product quality, embodying ability to mentor.
- Implemented new features and enhanced legacy systems, focusing on innovations and data-driven improvements.
- Fostered an environment that values ongoing learning and proactive improvement, exceeding expectations and maintaining a competitive edge.
- Tech Stacks: JEE 5, JSF, JQuery, EJB3, Hibernate(JPA), JAX-RS, JSON, DB Oracle, JBoss, Tomcat, Git, Maven, Jenkins, Linux, Agile, SCRUM, TDD, Junit, TestNG Eclipse, JIRA, UML.
Senior JEE Developer
Sapientia
Brasilia, BRAZIL
08.2012 - 02.2013
- Java Advocate, influencing project decisions and aligning with best practices, demonstrating strategic thinking.
- Designed Java solutions with EE, JSF, and Spring Boot, ensuring seamless integration and focusing on data processing.
- Configured continuous integration processes, optimising development efficiency and ensuring reliability.
- Effectively explained the benefits of Java technology, securing its adoption within projects.
- Tech Stacks: JEE 6, SpringBoot, JSF2, CDI, JQuery, EJB, JPA, JUnit, Maven, SVN, RESTful API.
Senior FullStack Java Developer
Indra Politec
Goiania, BRAZIL
07.2009 - 03.2011
- Led the development of an innovative software using Google Maps API, focusing on user needs.
- Helped users spot key city areas needing attention, such as infrastructure maintenance, demonstrating a data-driven approach.
- Integrated Adobe Flex for the UI and Java/JSF for the backend to ensure performance and usability.
- Followed CMMI Level 3 standards for high-quality development.
- Tech Stacks: Adobe Flex 3, JSF1, JSP, Java, Tomcat, JBoss, Maven, ANT, SVN.
Senior PHP Full-stack Software Engineer
SENAC GO
Goiania, BRAZIL
02.2007 - 03.2009
- FullStack Dev PHP for users of educational systems and Java for building custom CMS, demonstrating Full Stack capabilities.
- Proficient in PostgreSQL and relational database management for data efficiency and database management.
- Ensured seamless operation and optimal performance of educational platforms and CMS, focusing on reliability.
- Catered to diverse user needs while maintaining high standards of functionality and reliability.
- Tech Stacks: PHP, HTML, CSS, JavaScript, Java, Apache, Linux.
Education
MBA, Postgraduate Diploma in Science - Artificial Intelligence
NCI
Dublin, Ireland 09.2025 - 12.2025
MBA - GoLang Programming Language Expert
FullCycle
Sao Paulo, SP, BRAZIL 05.2024 - 05.2025
MBA - Service-Oriented Architecture
UNIEURO
Brasilia, DF, BRAZIL 01.2012 - 12.2013
Degree - Software Development
PUC GO
Goiania, GO, BRAZIL 02.2008 - 12.2012
Skills
- Back-End: Java, Nodejs, NestJS, TypeScript, Python, GoLang, PostgreSQL, MySQL, MongoDB, DynamoDB, Redis, Kafka, AWS Serverless, Event-Driven Architecture, REST, Microservices, risk management, fraud detection, database management, data processing
- Front-End: Reactjs, JavaScript, Nextjs, Remix, Bootstrap, tailwindcss, HTML5, CSS3, usability
- Infrastructure: AWS Cloud, GCP, Azure, Kubernetes, Docker, Git, CI/CD (Jenkins, GitActions), Linux, CloudFormation, SAM, New Relic, Terraform, grafana, prometheus, cloud infrastructure, security
- Architectural Leadership: Microservices, Serverless, Event-Driven Architecture, Cloud-Native Solutions, Scalable System Designs, Distributed Systems, Clean Architecture, technical architecture, system architecture, strategic thinking
- Mentorship & Technical Leadership: Code Reviews, 1:1 Coaching, Knowledge Sharing, Pair Programming, Technical Strategy, Communication skills, ability to mentor
- Management: Agile Team, MOB, 1:1, Code Review, JIRA, Presenting, Mentor, Lecturing, lean, ambitious, reliability
- Distributed systems design
- Cloud architecture
- Microservices implementation
- Event-driven architecture
- Continuous integration practices
- Serverless solutions
- Data-driven decision making
- Risk management strategies
- Quality assurance methodologies
- Cross-functional collaboration
- Technical mentorship
- Agile project management
- Scalability solutions
- Performance optimisation
- User experience enhancement
- Scalable system designing
- Front-End technology
- Debugging aptitude
- API integration
- Cloud infrastructure management
- Applying encryption methods
- Efficiency optimisation
- Collaborative development
- Client-Side scripting
- Agile methodologies understanding
- DevOps principles application
- Code review and auditing
- Java programming
- Advanced algorithms
- Software architecture planning
- Microservices architecture design
- Git version control use
- Docker usage mastery
- RESTful api development
- Software testing competency
- Data structures knowledge
- Algorithm design capability
- Issue resolution
- Database management
- Systems Analysis
Certification
- AWS Certified Solutions Architect – Associate, Dublin, Ireland — July 2023
- Oracle Certified Professional, Java SE 6 Programmer, Oracle, Brazil — February 2011
- Oracle Certified Expert, Java EE 6 Web Component Developer, Oracle, Brazil — March 2015
LANGUAGES
Portuguese: Native
Master or proficient
C2
English: Fluent
Master or proficient
C2
References
References available upon request.
Timeline
MBA, Postgraduate Diploma in Science - Artificial Intelligence
NCI
09.2025 - 12.2025
Staff Software Engineer
Prove Identity
07.2025 - 12.2025
Freelance as Subject Matter Expert Lecturer
University College Dublin
09.2024 - 12.2025
MBA - GoLang Programming Language Expert
FullCycle
05.2024 - 05.2025
Principal Software Engineer
Globalization Partners
05.2022 - 07.2025
Freelance as Guest Lecture
Dublin Coding School
01.2022 - 09.2024
Senior Software Engineer
TD Securities
10.2020 - 05.2022
App Tech Lead Engineer (VP)
Citibank
07.2017 - 04.2020
Senior Software Engineer
IBM
12.2015 - 06.2017
Senior FullStack JEE Consultant
Montreal
08.2013 - 04.2014
Senior Team Lead FullStack Architect JEE
Cast Group
03.2013 - 08.2013
Senior JEE Developer
Sapientia
08.2012 - 02.2013
MBA - Service-Oriented Architecture
UNIEURO
01.2012 - 12.2013
Senior FullStack Java Developer
Indra Politec
07.2009 - 03.2011
Degree - Software Development
PUC GO
02.2008 - 12.2012
Senior PHP Full-stack Software Engineer
SENAC GO
02.2007 - 03.2009