Open to opportunities

Jackson Antonio

@jacksonantonio25

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Senior software engineer specializing in frontend systems and scalable web & mobile apps.

Australia

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What I'm looking for

I seek a senior engineering role focused on frontend-led, cross-functional teams building secure, high-performance web and mobile products with opportunities for mentorship and technical leadership.

I am a Senior Software Engineer with 10+ years building and scaling user-facing web and mobile applications across healthcare, fintech, consulting, and startup environments. I focus on frontend architecture and high-performance UI using React.js, React Native, Next.js, Svelte, and related modern frameworks.

I also support backend development with Node.js and Python, contribute to microservice, CI/CD, and cloud deployments, and drive secure, production-ready systems. My work has improved performance, reduced defects, and increased user engagement across large-scale products.

Guided by the principle “Stay hungry, stay foolish,” I prioritize ownership, cross-functional collaboration, mentorship, and continuous improvement to help teams move faster while maintaining high engineering standards.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Cigna

Oct 2024 - Present (1 year 4 months)

Led development of AI-enhanced myCigna frontend and integrations, improving provider efficiency by 22% and reducing clinician task completion time by 30% while enforcing HIPAA-compliant interfaces and improving audit readiness.

Next.js React Native Svelte fastAPI Playwright CI CD

Full Stack Engineer

U.S. Bancorp

Sep 2019 - Aug 2024 (4 years 11 months)

Spearheaded frontend for web and mobile banking apps for 150,000+ active users, improving load times and responsiveness (up to 45% faster) and raising payment completion rates by 28% via secure payment integrations.

React 18+React Native SvelteKit Next.js Zustand Recoil GraphQL Jest Cypress

Software Engineer

Biteable

May 2017 - Aug 2019 (2 years 3 months)

Developed SaaS web and mobile applications using React and React Native, improving rendering and transition performance (up to 30%) and increasing onboarding completion by 25% for products with 50,000+ MAU.

React React Native JavaScript Flask Redux Performance Optimization Unit Testing

Full Stack Developer

Medibank

Feb 2015 - Apr 2017 (2 years 2 months)

Built high-performance user-facing features and reusable UI components with React and Node.js, optimizing performance via code-splitting and lazy loading to improve engagement and reliability.