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Available Engineers 5 Luis Lucio

Technical Skills

























Luis Lucio

Full Stack Engineer| Fixed Monthly Rate: $10,250 | $60/hr

I am a passionate software developer with over 15+ years of extensive experience in software development, developing and maintaining high-performing, scalable, and distributed systems using the latest technologies in industries such as Banking and Financial, Public Administration, and IT Services. I am always looking for interesting challenges and learning new things. I love to create simple and elegant solutions to complex problems and always try to use the right tools for the job. I can write code using the most popular programming languages, but I’m especially good with Java, Elixir, Python, and JavaScript.

Education

National Polytechnic Institute (IPN) – Higher School of Computing (ESCOM), Engineering Degree in Computer Systems Engineering – 2011

AWS Certified Cloud Practitioner – 2025

Experience

Sonatafy Technology

Sr. Software Engineer — 2022 – Present
  • Achieved the complete migration of the data plane from an expensive SaaS provider to a cheaper alternative, which saved the company 30 to 40 percent costs in data warehousing costs.
  • My team was in charge of orchestrating the migration to a new self-managed data warehousing solution, which involved creating an entirely new backend service fully developed in-house using Elixir.
  • My team was in charge of implementing the highest-priority new features, from creating the Graphql APIs in Elixir or Java to implementing the frontend clients using the latest React libraries.
  • Collaborated with the UI/UX team to implement responsive and user-friendly interfaces using material-ui, optimizing the application for various devices and screen sizes.
  • I am in charge of developing quickly developed POCs that product owners use to showcase to stakeholders, which other teams in the company will eventually develop.
  • Managed application state using Redux, integrating it with React for more predictable state management in a large-scale application, improving maintainability and testability.
  • Utilized @apollo/client to connect the React frontend with GraphQL APIs, enabling efficient data fetching, caching, and state management in a single solution.
  • Leveraged @sentry/react and @datadog/browser-rum to monitor front-end performance and log errors in production, ensuring high reliability and quick debugging.
  • Implemented form inputs and complex user interactions using material-ui/pickers, react-select, and react-checkbox-tree, enhancing the application’s interactivity.
  • Enhanced the development workflow by utilizing Storybook (storybook/react) to build and test UI components in isolation, facilitating better reusability and consistency.
  • Ensured robust error boundary handling in the React application using Error Boundaries and sentry/react to gracefully handle JavaScript errors in production builds.
  • Contributed to the application’s Continuous Integration and Continuous Deployment (CI/CD) pipelines using GitHub Actions and automated deployment with Terraform, improving the development to production workflow.
  • Integrated OKTA for secure identity management, providing scalable and reliable user authentication and authorization functionalities within the application.
  • Implemented a dynamic theming solution with material-ui/styles, allowing for flexible and customizable UI themes according to branding requirements.
  • Adopted and implemented LaunchDarkly for feature flagging to control feature releases and perform A/B testing, leading to safer deployments and reduced risk of regressions.
  • Worked extensively and oversaw the development and maintenance of the back-end components of the customer’s platform, focusing on its series of Elixir and Java services.
  • Monitored system performance and logs with Datadog, contributing to system reliability and uptime.
  • Developed SOAP and Rest web services with Java and Spring Boot as microservices for information retrieval.
  • Defined the architecture of the application for specific modules.
  • Collaborated in designing the front end with the UI/UX team, ensuring a seamless user experience.
  • Outlined application architecture for specific modules, ensuring scalability and performance.
  • Implemented and optimized data access layer for database interactions with Oracle, PostgreSQL, MySQL, Snowflake, and Clickhouse, optimizing
  • Prototyped microservice architectures using Kubernetes and Docker, fostering a resilient and scalable system.
  • Adopted Agile methodologies with Scrum for iterative development and continuous improvement.

Ministry of Public Administration

Sr. Software Engineer — 2019 – 2022
  • Served as a Technical Lead in a Java/React-heavy environment, focusing on cloud computing.
  • Led the front-end development using React to build responsive and accessible user interfaces for various government applications, ensuring compatibility across modern web browsers.
  • Spearheaded migrating legacy systems to modern front-end frameworks, reducing maintenance overhead and improving user experience.
  • Designed and implemented state management solutions with Redux to handle complex application states efficiently, improving performance and maintainability.
  • Integrated GraphQL APIs into React applications using Apollo Client, enabling a more efficient and flexible data retrieval and state management process.
  • Worked closely with the UI/UX team to translate designs and wireframes into high-quality code, ensuring fidelity to the original design specifications.
  • Utilized React Hooks and Context API to manage local state and side effects in function components, fostering cleaner code and simpler component lifecycle management.
  • Implemented unit and integration tests using React Testing Library and Jest to maintain high code quality and application reliability.
  • Developed custom reusable React components and hooks to standardize UI elements across various government platforms for a consistent look and feel.
  • Optimized front-end performance by analyzing bundle sizes and implementing code-splitting and lazy-loading techniques with React.
  • Employed the latest features of React (such as Concurrent Mode) to enhance concurrent rendering capabilities for a smoother user experience.
  • Collaborated with back-end developers to ensure seamless integration of RESTful services and optimize data exchange between front-end and back-end layers.
  • Coordinated the deployment of front-end code to cloud environments, aligning with DevOps practices using GitLab CI/CD pipelines.
  • Enhanced application security by implementing best practices and using security-focused libraries to protect against common web vulnerabilities.
  • Managed feature flagging and A/B testing using tools like LaunchDarkly to introduce new features with minimal risk and gather user feedback for iterative development.
  • Managed both cloud and on-premises computing platforms.
  • Conducted orchestration with GCP and GKE.
  • Implemented middleware solution by integrating applications using Client‐server architecture.
  • Led a team of 2 developers, ensuring task allocation, mentoring, best code practices, and architecture design.
  • Added compatibility for old applications in new browsers using JSF RichFaces.
  • Developed SOAP and Rest web services with WSO2 Data Services.
  • Streamlined resource-heavy processes to improve efficiency and reduce process times.
  • Collaborated with IT vendors for specific projects, overseeing their development and production release.
  • Developed several reports using Jasper Reports.
  • Conducted comprehensive log analysis for system improvements.

Ministry of Public Administration

Full stack Developer — 2015 – 2019
  • Focused on Java development, microservices, and container orchestration with Kubernetes.
  • Automated CI/CD pipelines using GitLab CI/CD.
  • Oversaw the migration of internal Java systems to an in-house bare-bones Kubernetes cluster.
  • Led a team, ensuring task allocations, mentoring, best code practices, and architecture design.
  • Redesigned applications to be compatible with modern frameworks and tools.
  • Assisted in the architectural design of an offline/online application, ensuring encryption measures.
  • Streamlined processes that consumed too many resources to enhance efficiency.
  • Coordinated with IT vendors for project development, testing, and production releases.
  • Developed and maintained REST simulators for TDD development.
  • Provided expertise in the development of Web Services using RESTful.
  • Exchanged resources using RESTful web services with JSON format data.
  • Developed front-end user interfaces by leveraging modern JavaScript frameworks such as Angular to create single-page applications (SPAs) and React to build reusable UI components.
  • Utilized Next.js for server-side rendering to optimize SEO and improve performance on the front end.
  • Engineered robust back-end services with Java 8 and Spring Framework, creating a scalable and secure RESTful API layer.
  • Designed and implemented microservices architecture using Spring Boot, which facilitated the modularization of the application for better scalability and maintenance.
  • Led the orchestration and deployment of microservices on Kubernetes clusters, enhancing the system’s fault tolerance and load-balancing capabilities.
  • Automated Continuous Integration/Continuous Deployment (CI/CD) workflows using GitLab CI/CD, improving the team’s productivity and code quality.
  • Directed migrating legacy Java systems to cloud-native architectures within Kubernetes environments, ensuring zero downtime and high availability.
  • Managed a development team, overseeing task distribution and code review sessions, mentoring junior developers, and ensuring adherence to best coding practices and architectural patterns.
  • Redesigned legacy applications to integrate with modern JavaScript frameworks and libraries, aligning with the latest web development trends and practices.
  • Contributed to the architectural design of hybrid offline/online applications, implementing encryption and security measures to protect sensitive data.
  • Optimized resource-intensive processes by refactoring code and introducing efficient algorithms, significantly reducing the application’s load time and server utilization.
  • Coordinated cross-functionally with IT vendors and stakeholders throughout the project lifecycle, including development, testing, and production deployments.
  • Actively engaged in all phases of the Software Development Life Cycle (SDLC), from initial design to prototyping, development, testing, and maintenance.

Supreme Court of Justice

Software Engineer — 2014 – 2015
  • Involved in the complete software development life cycle of two workflow management systems: Judicial process and law management systems.
  • Developed front-end components using JSP, Servlets, HTML, and JavaScript to create dynamic and interactive web pages.
  • Worked on backend components, utilizing Java and JDBC to interact with the database and implement business logic.
  • Managed application state and business logic using the Spring Framework, facilitating transaction management and dependency injection.
  • Monitored application performance and addressed bottlenecks by profiling Java applications using tools like JVisualVM
  • Employed Maven to build the application, manage dependencies, and automate the project lifecycle.
  • I used T-SQL daily to create custom views for business data and analysis
  • Responsible for the definition and implementation of software testing methodologies

Santander Bank

Software Engineer — 2010 – 2013
  • Served on the Business Intelligence team of Banco Santander, focusing on the development of the DataMart for ATM operations.
  • Designed and implemented data extraction, transformation, and loading (ETL) processes using Java and Spring, ensuring efficient data handling for reporting purposes.
  • Achieved rapid adaptation to the bank’s IT methodologies and SAS technologies, contributing to high-quality data analytics solutions.
  • Developed Java EE-based services for transaction processing and data manipulation, improving the reliability of the daily operational data collection.
  • Managed persistence layers using Hibernate to interact with Oracle DB, ensuring optimized data access and manipulation.
  • Employed Java Message Service (JMS) for reliable and asynchronous communication between different components of the DataMart system.
  • Designed user interfaces and reports using JavaServer Faces (JSF) and JasperReports, enhancing the visualization of transactional data.
  • Wrote robust and maintainable code, supported by unit tests created with JUnit, to ensure the functionality met the high standards required by the financial sector.
  • Utilized Jenkins for continuous integration, streamlining the build and deployment process, and improving the overall software quality.
  • Integrated RESTful services to facilitate interoperability and modular architecture within the bank’s systems.

Aklara US

Software Engineer — 2008 – 2010
  • Played a key role in the design team of a supply management software company, focusing on the automation of construction, implementation, and testing processes for weekly system builds.
  • Designed and developed robust front-end components using ASP.NET Web Forms and Windows Forms Presentation Foundation (WPF) with a focus on creating a seamless user experience.
  • Implemented business logic and backend services in C#, leveraging .NET Framework capabilities to ensure high performance and maintainability.
  • Authored and optimized SQL stored procedures and functions for data manipulation and complex business logic on Microsoft SQL Server.
  • Monitored and tuned SQL Server performance using SQL Server Profiler and Database Engine Tuning Advisor to identify and resolve performance issues or deadlocks.
  • Employed T-SQL to design and maintain custom views, stored procedures, and triggers for business data analysis and reporting.
  • Defined and implemented software testing methodologies, including unit and integration testing, to ensure software quality using Microsoft Visual Studio Test Tools
  • Conducted thorough security assessments, aligning with industry best practices and compliance standards to fortify application security.
  • Managed source code and version control using Microsoft Team Foundation Server (TFS), enhancing team collaboration and code integrity.

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