Open to opportunities

Elton Okawa

@eltonokawa

Message

Senior full-stack developer specializing in scalable systems, high test coverage, and performance optimization.

Brazil

Message

What I'm looking for

I seek a role where I can drive performance and reliability improvements, work in collaborative English-speaking teams, and grow into technical leadership while leveraging cloud-native architectures.

I am a senior full-stack developer with six years of professional experience building and maintaining large, long-lived codebases. I graduated from POLI‑USP with a final grade of 8.7/10 and received an award from the Engineering Association of São Paulo for outstanding performance.

My work spans backend and frontend technologies including Node.js, NestJS, React, Angular and cloud platforms such as GCP and AWS. I have delivered projects with high test coverage, designed microservices, and shipped systems handling thousands of requests per day.

Notable achievements include reducing an API save response time from ~1000ms to ~100ms, cutting component validation time by 80%, producing production-ready micro-frontend hosting, and building stable A/B testing and release pipelines used across multiple games. I also authored extensive technical documentation to onboard and support teams.

I thrive in collaborative, English-speaking environments, enjoy optimizing performance and reliability, and focus on clean architecture, automated testing, and pragmatic problem-solving to deliver measurable business impact.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Developer

Current

Jitterbit

Sep 2024 - Present (1 year 1 month)

Reduced save API response time from ~1000ms to ~100ms and cut component validation time by 80% while contributing to a 9-year codebase across a 10-person engineering team.

NestJS Angular DynamoDB Performance Optimization Microservices Docker Kubernetes

Midlevel Full Stack Developer

Midway (Riachuelo)

Oct 2023 - Aug 2024 (10 months)

Developed loyalty benefits programs processing ~300k purchases/day and supporting 32k program members using Node.js, React and AWS-based data pipelines.

Node React AWS Airflow Docker Kubernetes Backend Development Scalability

Full Stack Developer

SpaceSheepGames

Jan 2021 - Sep 2023 (2 years 8 months)

Built an A/B Test Manager and production micro-frontend hosting platform, enabled signing/publishing pipelines for ~10 games and maintained zero production errors for internal tools.

React GCP)Docker Kubernetes GoCD CI CD Technical Documentation GCP

Backend Developer Intern

FDTE

May 2020 - Sep 2020 (4 months)

Created Java REST APIs with automated tests, ensuring 100% of new features were tested and reviewed ~75% of team pull requests to improve code quality.

Java REST APIs Automated Testing Code Review Unit Testing Integration Testing CI CD

Backend Developer Intern

Taqtile Brazil

Sep 2019 - Jan 2020 (4 months)

Implemented backend features for an internal retail app using Node.js, Typescript and PostgreSQL and raised test coverage to ~80% for the existing codebase.

Node TypeScript PostgreSQL GraphQL Unit Testing Integration Testing Test Coverage

Software Developer Intern

Visagio Tecnologia

Jan 2019 - May 2019 (4 months)

Developed an invoice management tool in Ruby on Rails used by ~50 users and automated invoice downloads via Selenium for five providers without APIs.

Ruby on Rails Selenium Automation)Invoice Processing Backend Development Testing Automation

Software Developer Intern

Tapps Games

May 2018 - Sep 2018 (4 months)

Updated and tested three internal game packages and participated in peer code reviews to improve internal library reliability.

Software Testing Package Maintenance Code Review JavaScript

Education

Degrees, certifications, and relevant coursework

Escola Politécnica da Universidade de São Paulo (POLI-USP)

Bachelor degree, Computer Engineering

2016 - 2020

Grade: 8.7/10

Bachelor degree in Computer Engineering from POLI-USP, graduated with final grade 8.7/10 and received an award from the Engineering Association of São Paulo for outstanding performance.