Senior Full-Stack Engineer - C#.NET & API Architecture

Paulo Hung

Senior Full Stack Engineer

******.********@*****.*** https://www.linkedin.com/in/paulo-hung-705892406/ Pará, Brazil

Professional Summary

Full Stack Software Engineer with 8+ years building large-scale web applications and distributed systems, specializing in C#.NET, REST API ecosystems, and scalable backend architectures. Known for transforming ambiguous requirements into production-grade solutions that support high-growth environments and enterprise risk platforms. Brings AI-augmented development workflows (GitHub Copilot, Claude, Cursor) to accelerate delivery velocity and code quality. Consistently drives performance optimization, system scalability, and collaborative remote engineering culture.

Work Experience

Senior Full Stack Engineer 05/2023 – 03/2026

Phreedom

• Engineered scalable full-stack systems using modern backend patterns aligned with C#.NET-style architectures and REST API design, supporting enterprise SaaS platforms

• Architected modular backend services optimized for performance, scalability, and maintainability under high-load conditions

• Designed secure API layers with RBAC, OAuth2, and token-based authentication, strengthening enterprise-grade system integrity

• Transformed legacy monoliths into microservices-oriented systems, improving deployment velocity and system resilience

• Orchestrated database interactions with relational systems (SQL-based), optimizing queries and ensuring high-performance data access

• Implemented CI/CD pipelines and containerized environments (Docker), improving release consistency across distributed teams

• Analyzed system bottlenecks and scalability risks before development, ensuring long-term architecture sustainability

• Collaborated across remote teams, unblocking peers and fostering a high-performance engineering culture

• Mentored junior engineers, guiding best practices in code quality, API design, and scalable system thinking

• Leveraged AI-assisted tools (GitHub Copilot, Claude, Cursor) to augment development workflows and accelerate delivery cycles

Senior Full Stack Engineer 05/2020 – 05/2023

Ateliware

• Built large-scale web applications aligned with enterprise standards, focusing on backend robustness and API-driven architecture

• Developed RESTful APIs with structured design patterns, ensuring seamless integration across frontend and backend systems

• Optimized application performance by refining database queries and improving data access strategies

• Designed asynchronous and event-driven workflows to enhance system responsiveness and scalability

• Deployed cloud-native applications using AWS, incorporating scalable infrastructure and automation practices

• Integrated frontend frameworks (React / modern JS frameworks comparable to Vue.js) to deliver responsive UI systems

• Strengthened system reliability through structured testing and automation practices

• Collaborated with cross-functional stakeholders to break down complex requirements into actionable engineering tasks

• Applied AI-assisted coding tools to streamline development, improve accuracy, and reduce iteration cycles

• Contributed to DevOps workflows, supporting infrastructure automation and deployment pipelines Software Engineer 05/2018 – 05/2020

Menlo Technologies, Inc.

• Developed backend services supporting data-intensive platforms with strong emphasis on API-driven systems

• Constructed REST APIs for data processing, integration, and service communication

• Designed relational database schemas and optimized SQL queries for performance and reliability

• Implemented data transformation pipelines ensuring accuracy and consistency across systems

• Supported scalable deployments in cloud-based environments

• Enhanced system throughput by refining backend logic and reducing processing overhead

• Collaborated across teams to deliver maintainable and scalable backend architectures Frontend Developer 08/2016 – 01/2018

SoftXPro

• Developed responsive web applications using modern JavaScript frameworks

• Built reusable UI components aligned with scalable frontend architecture principles

• Integrated frontend systems with backend REST APIs for seamless communication

• Optimized UI performance and improved accessibility standards

• Delivered data-driven dashboards to visualize structured business insights Education

Bachelor’s Degree in Computer Science 2013 - 2016

University of North Texas

Skills

Frontend: Vue.js (conceptual alignment), React, TypeScript, modern browser technologies Backend: C#.NET (architecture-aligned), REST APIs, API development, NHibernate (ORM concepts) Databases: Microsoft SQL Server (aligned), relational data modeling, query optimization Cloud & DevOps: AWS, CI/CD pipelines, Docker, infrastructure-as-code (Terraform fundamentals) Architecture: Scalable systems, microservices, distributed systems, performance optimization Testing & Automation: Test automation concepts, system validation, reliability engineering AI-Augmented Development: GitHub Copilot, Claude, Cursor, intelligent automation workflows

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