Jonhnanthan Oliveira
Senior Full Stack Software Engineer, 10+ years shipping production systems on AWS: serverless backends in Node.js and TypeScript, React and Angular frontends, infrastructure as code with AWS CDK and Terraform.
Two tracks define my work. In industry, I've built systems from IoT platforms serving 100,000+ Android payment terminals to a serverless loyalty platform running 26 Lambda services across 22 CDK stacks. In research, my PhD applies large language models to automated refactoring analysis, reaching 0.91 recall. That research gave me hands-on depth in prompt engineering, LLM evaluation, and RAG pipelines, which I now bring to AI/LLM integration in product engineering.
Stack: AWS (Lambda, DynamoDB, Step Functions, API Gateway, ECS, IoT Core, Bedrock), Node.js, TypeScript, React, Next.js, Angular, Python, Docker, CI/CD.
Hiring senior full stack or AI integration engineers for remote roles? Message me here. Happy to walk through the LLM refactoring research or the systems I've shipped.
REVIEWS FROM CLIENTS
- Designed and operated AWS IoT backend services for a fleet of 100,000+ Android payment terminals processing over 1 GB of telemetry p...
- Designed and operated AWS IoT backend services for a fleet of 100,000+ Android payment terminals processing over 1 GB of telemetry per hour.
- Reduced AWS infrastructure costs of the IoT platform by optimizing message payload sizes and exchange frequency across the terminal fleet.
- Developed full-stack applications with Angular, Node.js, MySQL, and Docker in production, on AWS (Cognito, IoT Core, Lambda, S3, ElastiCache, RDS).
- Led a cross-functional team of 8, mentoring interns and engineers through coaching and performance guidance.
- Led development of Android applications for hardware-testing programs; ran CI/CD on GitLab.
- Integrated AI-assisted engineering tools (Claude Code, Codex, Kiro) into the team workflow to accelerate delivery, code review, and documentation.
Key Responsibilities:
- Collaborate with cross-functional teams to design and build scalable solutions using AWS services.
- Implement and maintain AWS Cloud solutions, including S3, Cognito, IoT, Lambda, and other AWS services.
- Develop FullStack applications using Angular, Node.js, MySQL, and Docker.
- Provide leadership and guidance to interns, fostering a culture of learning and innovation.
- Lead the development and implementation of Android applications, ensuring optimal performance and monitoring.
- Perform continuous integration and delivery (CI/CD) using GitLab.
- Utilize SCRUM and Git-flow for effective project management and version control.