Staff Frontend Software Engineer

Rei Kurata

**** *. ******* ** *** Pedro, CA ***** 714-***-**** *******@*****.***

Staff Software Engineer Frontend Development

15+ years as Full-Stack & Frontend

Engineer at growth stage startups like Sift

Science to large organizations like

Accenture. Expertise delivering

optimized, scalable frontend

applications, building end-to-end web

application systems from scratch or

refactoring/enhancing, integrating

backend and infrastructure to build

high-performance frontend ecosystems,

and aligning technical implementation

with customers' needs.

Expert in architecting scalable and

sustainable frontend systems, primarily

utilizing React.js. I prioritize

maintainability and scalability, having

efficient testing and code quality

frameworks. Proficient in high-speed

development with AI-assisted tools

Copilot, Gemini Code, and Claude Code.

Experienced in full-stack development,

deploying scalable systems on Amazon

Web Services and physical server

infrastructure.

Managed full development lifecycles for

projects, collaborating effectively with

diverse onshore and offshore teams of

7+ engineers. As a cross-functional

engineer, consistently delivered project

excellence. Documented the technical

resource guidelines, organized

workshops/group meetings to facilitate

knowledge sharing engineering, product,

and design team. Mentored development

teams to foster a culture of continuous

process improvement and learning.

Technical Skills

● Frontend: JavaScript, TypeScript, React, Next.js, Gatsby, D3.js, HTML5, CSS, less, sass, jQuery, jQuery Mobile

● Backend/Data: Java, PHP, Spring framework, Express.js, Zend framework, MySQL, Oracle JDBC, MongoDB, DynamoDB,

● Cloud/DevOps: AWS (IAM, EC2, S3, CloudFront, CodePipeline, Lambda, API Gateway, WAF), Docker, Unix/Linux, Shell scripting, Tableau, Pardot

● Development tools: webpack, jenkins, Circle CI, VS Code, eclipse, git, Copilot, Gemini Code, Claude Code, lint, prettier, storybook

● E-commerce/CMS: Magento 2, Oracle Commerce Cloud, WordPress

● Testing/Quality/Analytics: Cypress, jest, jasmine, karma, backstop, JUnit, SonarQube, rollbar, pendo, mixpanel Professional Highlights

Staff Frontend Engineer at Sift Science Inc. Remote, US Mar 2021 – Feb 2026

● Owned the frontend development of the interactive, on-the-fly data analysis UI application for end-users' 10M+ transaction data based on React.js and React Query. Increased the customer retention rate 10+% per feature implementation.

● Delivered custom data visualizations using D3.js, provided critical insights into data transitions and accelerated customer analysis time by approximately 90%.

● Architected and deployed an end-to-end testing framework with Cypress to enhance backward compatibility, successfully reduced the application revert rate to 3% and established an initial use case coverage rate of appx 20%.

● Led strategic technology upgrades that enhanced performance and maintainability. Implemented React Query to modernize the data fetch layer (increasing development productivity by 50%) and integrated SonarQube and Rollbar into the CI/CD pipeline to reduce error detection time from x hours to x minutes.

● Provided technical leadership and strategic direction for a frontend engineering team of ~10 engineers, driving key web application development tactics. Led a weekly workshop and leadership meeting to increase the communication and knowledge share.

● Mentored 2-3 junior engineers at a time through 1:1 sessions, fostering career growth and technical skill development.

● Contributed to talent acquisition by conducting technical and coding interviews. 10 sessions per year.

● Recognized for innovation by winning 2 internal Hackathon awards. Senior Frontend Engineer at merQbiz LLC Los Angeles, CA May 2017 – Mar 2021

● Led the development of the OMS application (React.js, Redux, Gatsby) to service 10+ major waste paper suppliers, cutting the average order processing time from 1 hour to 5 minutes.

● Leveraged Tableau integration to deliver crucial data analytics and visual insights, enabling customers to make quick supply and order process decisions, reducing the necessary time from 1 hour to 5 minutes.

● Developed proxy servers using Express.js to facilitate integration with Salesforce API and Pardot. Reduced redundant work to 0.

● Directed the technical design and development of the company's e-commerce platform on Magento 2 overseeing the offshore team of 8 developers.

Senior Frontend Engineer at Aaxis Commerce Inc Los Angeles, CA Jan 2016 – Feb 2017

● Led e-commerce sites scale 5000+ visits and 100+ orders per day in Oracle Commerce Cloud.

● Engineered administrative sites utilizing the MEAN.JS stack and AngularJS. Software Engineering Team Lead at Accenture PLC Los Angeles, CA Jan 2012 – Jan 2016

● Led the development and statewide launch of the California State Welfare system, leading an 8 engineer team utilizing the Spring framework and Oracle JDBC.

● Delivered state representative-approved functional requirements documentation.

● Developed and formalized unit and system integration test scenarios, securing approval from the state representative.

● Developed and launched a webview application for Chase Bank customers quick view tool on ipads utilizing Spring Mobile and jQuery Mobile. Launched to appx 300 branches.

● Developed Disney World's web application with the Zend framework and jQuery. Additional Experiences

● Developed secure APIs with PHP for credit card processing services.

● Managed network infrastructure (Cisco, SonicWALL) for hosting and colocation services (Linux, Windows Servers).

● Built and maintained shared web hosting systems (Apache, MySQL, PostgreSQL, BIND, sendmail, Qmail).

● Developed custom WordPress plugins and a Flash-based live-streaming system.

● Managed the Certificate Authority (CA) and digital ID issuing system. Certificate

Oracle Certified Associate, Java SE 7 Programmer

Coding Volunteer

Wikipedia, OpenHatch etc

Education

B.A., Sophia University – Tokyo, Japan

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