J
jeucasulo's photo
Jeú Guimarães Conrado Junior
From Brazil 11:46 PM (GMT-03:00)
$40/hr or $60,000/yr

Active 1 hour ago


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Senior Full-Stack Engineer

Software Engineer
Available for hire
Years of experience
8+ years
Experience level
Senior
Available for
Full-time, Part-time, Contract, Freelance
Available from
13 Apr 2026

Senior Software Engineer with 8+ years of experience, specializing in PHP and its ecosystem.

Expert in Laravel, CodeIgniter, and CakePHP, delivering scalable, high-performance applications.

Strong backend experience with Java and Spring Boot, building reliable and efficient services.

Proficient in modern frontend development using React, Vue.js, and Angular, creating dynamic, responsive, and SSR-based applications.

Experienced in RESTful API design, microservices architecture, and integration patterns.

Solid background in relational and NoSQL databases (MySQL), with a focus on performance and scalability. Hands-on experience with Docker, Kubernetes, and Linux environments.

Strong advocate of clean architecture, SOLID principles, and automated testing to ensure maintainable and high-quality code. Consistently delivering creative and efficient solutions to complex problems.

Employment History

Senior Systems Analyst at FISERV 2025 - 2026
-Design and evolve distributed system architectures -Model and optimize relational databases (MySQL) -Ensure high performance and system availability -Implement complex business logic (payments, transactions, data confidentiality) -Develop scalable APIs (REST, GraphQL) -Integrate third-party systems (payment gateways, external platforms) -Design and maintain webhooks and asynchronous processing queues -Troubleshoot and resolve inter-service communication issues -Version APIs and maintain backward compatibility -Deploy and manage applications using Docker and Kubernetes -Maintain and operate applications in Linux environments -Configure and manage web servers (Apache, Nginx) -Monitor logs, errors, and system performance -Build and maintain CI/CD pipelines for automated deployments -Develop frontend interfaces using jQuery and Vue.js -Consume and integrate APIs on the frontend -Improve user experience (UX) and application performance -Ensure consistency between frontend and backend systems -Write clean, maintainable code following SOLID, DRY, and KISS principles -Refactor and improve legacy systems -Develop unit and integration tests -Conduct code reviews and ensure code quality -Implement basic security practices (authentication, authorization, validation) -Collaborate with product teams to define technical solutions -Support technical teams in troubleshooting complex issues -Participate in architectural decision-making -Mentor junior developers -Investigate and debug complex issues -Analyze system behavior and logs to identify root causes -Identify and resolve performance bottlenecks -Make technical decisions with real business impact
GFT at GFT 2024 - 2025
-Design, develop, and maintain web applications across backend and frontend layers -Write clean, efficient, and maintainable code using technologies such as PHP, JavaScript, SQL, and modern frameworks (CodeIgniter, CakePHP, Spring Boot, Angular) -Diagnose, troubleshoot, and resolve bugs in existing systems -Optimize and enhance software performance and scalability -Collaborate with cross-functional teams including database, infrastructure, product, and DevSecOps to deliver robust solutions -Participate in sprint planning, agile ceremonies, and code reviews -Develop and integrate RESTful APIs to enable communication between systems -Document APIs to ensure ease of integration and maintainability -Write automated tests to ensure code quality and reliability -Perform manual and automated testing to identify and resolve issues -Design, manage, and maintain database schemas -Execute complex SQL queries for data manipulation and analysis -Utilize frameworks such as CodeIgniter and CakePHP for application development -Manage development workflows using tools like Git, Docker, and WSL -Propose and implement improvements in development processes and coding practices -Actively participate in code reviews and technical feedback sessions -Create and maintain technical and user documentation -Develop user guides and manuals for software usage -Continuously improve skills through courses, workshops, and self-learning -Stay up to date with emerging technologies and industry trends
Integration Engineer at PayPal 2018 - 2024
-Develop tailored solutions to meet specific business and client requirements -Plan, design, implement, and document development and integration processes -Build tools and products to automate tasks and operational workflows -Define test plans, testing processes, and debugging strategies -Design customer-centric solutions and detailed architectures leveraging multiple PayPal APIs and SDKs -Identify product gaps and potential features, collaborating with internal product and engineering teams to drive improvements -Work closely with cross-functional teams including compliance, privacy, risk, information security, support, and operations to ensure successful merchant onboarding and launches -Manage pipelines and support onboarding processes for merchants on integrated payment platforms -Produce comprehensive technical documentation to enable accurate and efficient implementations -Provide post-implementation technical support to development teams, ensuring solution stability and continuity -Act as a Solutions Engineer, translating business requirements into scalable and effective solutions

Education

MBA in DevOps & Continuous Software Engineering at Pontifícia Universidade Católica 2025 - 2026
MBA in Information Technology Project Management at Descomplica 2023 - 2024
System Analysis and Development degree at Universidade Paulista 2013 - 2015