Paulo Emmanuel
Ferreira de Oliveira
linkedin.com/in/devpauloemmanuel
Software Engineer | Backend Specialist with 4+ years of solid experience in the Fintech sector,
building scalable, high-performance systems.
Specialized in Backend solutions using PHP (Laravel), Java, and Kotlin. I implement Hexagonal
Architecture, DDD, and Microservices/Modular Monoliths to deliver robust corporate systems.
Key success metrics:
- Reduced critical production errors by 30%.
- Reduced manual maintenance time from 40h to 8h (an 80% cut) using AI/LLMs for PHP
migration automation.
- Improved system performance and reduced server costs by 25%.
- Reduced share-selling time by 35%.
Professional Experience
Backend Software Engineer (Oct 2025 – Now) — Invillia| Remote
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Specialized in complex financial systems, focusing on cross-border operations.
Developed serverless AWS Lambda functions to successfully migrate an old service to a new
less expensive one.
Led application migration efforts, ensuring support for alphanumeric CNPJ.
Utilized PHP, Java and Kotlin daily in development.
Tech: PHP, Kotlin, Java, Quarkus, PHPUnit, PostgreSQL, Oracle, Node.js, MicroServices, Jenkins,
CI/CD, Docker, JavaScript, Outbox, Hexagonal architecture, Domain-Driven Design (DDD).
Software Engineer (Jan 2025 – Oct 2025) — Topaz Evolution | Remote
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Designed and delivered a new shopping cart module that reduced share-selling time by 35%,
increasing completed sales by 25%.
Engineered the "Big Deals" Feature to Rodobens Bank, streamlining the sales process by
eliminating redundant credit analyses, which directly reduced credit analysis costs and
decreased the time required for deal approval and sale.
Developed critical features for a financial client handling multi-billion USD per month.
Designed the complex credit analysis module using Strategy and Factory Design Patterns to
support multiple credit engines at same time.
Introduced unit testing standards and code review processes, resulting in a 30% reduction in
critical production errors.
Implemented Single Sign-On (SSO) with OAuth2/OIDC/JWT.
Developed AI/LLM tools for code generation and QA dataset generation, cutting manual
testing time.
Mentored development interns, establishing best practices and integration workflows.
Tech: PHP, Laravel, Node.js, JavaScript, Vue.js, Vuetify, Java, PHPUnit, Java, Node.js, Docker,
WebSocket/Webhook, Git, Kubernetes, Jenkins, CI/CD, SQL Server, PostgreSQL.
Software Engineer (Jan 2023 – Dec 2024) — Newm Mobile | Remote
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Led PHP 5.6 to 8.1 migration with Node.js scripts and LLM automation, reducing
maintenance time from 40h to 8h, improving performance by 25%, and reducing critical
errors.
Refactored legacy modules, improving execution speed by 20% and reducing technical debt.
Developed and maintained sales applications supporting millions of monthly transactions.
Configured Docker environments for Porto Seguro, accelerating deployment workflows.
Built back-office menu systems and configured Canopus’ hierarchy.
Tech: PHP, Laravel, JavaScript, Vue.js, Vuetify, Docker, SQL, Java, PostgreSQL, Node.js,
Git/GitHub, Docker, SQL Server, HTML5, CSS.
Software Engineer Internship (Dec 2021 – Dec 2022) — Newm Mobile | Remote
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Contributed to development of full stack modules following coding standards, accelerating
delivery and ensuring consistent quality.
Supported senior developers in design and implementation of backend and frontend
components.
Tech: PHP, Laravel, JavaScript, Vue.Js, Vuetify, Docker, SQL, Java, PostgreSQL, Node.js,
Git/GitHub, Docker, SQL Server, HTML5, CSS.
Skills
Backend: PHP, Java, Kotlin, Laravel, Lumen, Node.js
Frontend: Vue.js, React, JavaScript, TypeScript, HTML, CSS, Vuetify
Databases: PostgreSQL, SQL Server, MySQL
DevOps: Docker, CI/CD, Jenkins, Kubernetes, Git, GitHub, Postman
Testing: PHPUnit, Unit Testing, Integration Testing
Auth/Security: SSO, OAuth2/OIDC, JWT, RBAC, ABAC
Architecture: RESTful APIs, Microservices, Modular Monolith, Strategy Pattern
Tools & AI: WebSocket/Webhook, Redis, Kafka/RabbitMQ, Grafana, Prometheus, AI/LLM
Automation
Languages: Portuguese (Native), English (Advanced/C1)
Education
B.Sc. in Information Systems (Jan 2021 – Dec 2024) - Anhembi Morumbi
• Software development • Systems architecture • Design patterns • Software engineering •
Databases and SQL • Data structures • RESTful APIs • Agile methodologies and DevOps
Technical Degree in Internet Computing (Feb 2019 – Jul 2020) – ETEC Armando José
Farinazzo
• Web development • Programming • Web design • Databases and SQL • Technical English •
Microsoft Excel • Teamwork
Certifications & Training
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Docker
Design Patterns
Git/GitHub
GitHub Copilot
