Senior React and Next.js engineer with 20+ years in software delivery, focused on improving established customer-facing applications across government, travel, e-commerce, finance, education, and digital transformation. Strong hands-on capability in React, Next.js, TypeScript, JavaScript, HTML5, CSS3, Material UI, component architecture, responsive interfaces, state management, API integration, performance, debugging, and automated testing. Experienced in migrating legacy applications, completing complex user interfaces, resolving defects and inconsistencies, and refactoring for maintainability without disrupting delivery. Independent, product-minded collaborator who can quickly understand existing architecture, communicate clearly with remote stakeholders, and deliver incremental improvements long-term using tools such as Copilot/CodeX/CloudCode and ChatGPT, including RAG concepts on Azure OpenAI.

Javier Hack

Senior React and Next.js engineer with 20+ years in software delivery, focused on improving established customer-facing applications across government, travel, e-commerce, finance, education, and digital transformation. Strong hands-on capability in React, Next.js, TypeScript, JavaScript, HTML5, CSS3, Material UI, component architecture, responsive interfaces, state management, API integration, performance, debugging, and automated testing. Experienced in migrating legacy applications, completing complex user interfaces, resolving defects and inconsistencies, and refactoring for maintainability without disrupting delivery. Independent, product-minded collaborator who can quickly understand existing architecture, communicate clearly with remote stakeholders, and deliver incremental improvements long-term using tools such as Copilot/CodeX/CloudCode and ChatGPT, including RAG concepts on Azure OpenAI.

Available to hire

Senior React and Next.js engineer with 20+ years in software delivery, focused on improving established customer-facing applications across government, travel, e-commerce, finance, education, and digital transformation. Strong hands-on capability in React, Next.js, TypeScript, JavaScript, HTML5, CSS3, Material UI, component architecture, responsive interfaces, state management, API integration, performance, debugging, and automated testing.

Experienced in migrating legacy applications, completing complex user interfaces, resolving defects and inconsistencies, and refactoring for maintainability without disrupting delivery. Independent, product-minded collaborator who can quickly understand existing architecture, communicate clearly with remote stakeholders, and deliver incremental improvements long-term using tools such as Copilot/CodeX/CloudCode and ChatGPT, including RAG concepts on Azure OpenAI.

See more

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
See more

Language

Work Experience

Technical Lead / AI Engineering & Software Architecture & Product Delivery at TCS - TCS
April 1, 2026 - July 31, 2026
Technical lead role focused on AI-enabled and product delivery improvements, including applying coding assistants and AI-assisted workflows (code analysis, refactoring, testing, documentation) while maintaining quality. Mentored engineers and provided technical direction to raise frontend implementation quality and delivery standards.
Full Stack Engineer at ABS — Tata Consultancy Services (Virgin Australia)
August 1, 2025 - March 31, 2026
Delivered and maintained complex web interfaces for a high-volume post-census survey application using React 18, Next.js, TypeScript, and Material UI. Worked across new features and improvements to an existing codebase involving API integrations, performance enhancements, defect resolution, automated testing, and documentation. Collaborated closely with product managers and cross-functional Scrum teams, contributing to clean, maintainable component practices.
Full Stack Engineer at NHVR
February 1, 2025 - July 31, 2025
Extended an established React 18 and TypeScript accreditation application with complex regulatory workflows and GraphQL integrations. Improved component design, usability, accessibility, state management, performance, and maintainability while resolving defects and jurisdiction-specific inconsistencies. Contributed to test automation, documentation, and incremental technology/process improvements.
Full Stack Engineer at V2 Digital Consultancy
September 1, 2024 - March 31, 2025
Designed and built a React and Next.js App Router proof of concept integrating Citrus APIs into an existing campaign management product. Translated an ambiguous commercial requirement into a maintainable working experience projected to support at least 20% revenue growth.
Engineering Advisor / Principal Architect at Shift Green Hub
September 1, 2023 - Present
Acted as principal developer and architect across customer-facing, vendor-facing, and mobile-web viewing experiences using React, Next.js, TypeScript, Material UI, Tailwind, and Vercel. Owned the digital ecosystem end-to-end, reviewed architecture and code, resolved platform issues, and guided incremental product evolution. Led distributed teams across UI delivery, APIs, integrations, identity, payments, headless Shopify, and Azure OpenAI features.
Solutions Architect / Tech Lead at Brisbane City Council
August 1, 2023 - September 30, 2024
Led frontend architecture and implementation for Services supporting the Brisbane platform, including customer identity and account-management experience. Built and refined React/Next.js interfaces integrated with .NET Core APIs and Azure identity services across a business-critical public-facing ecosystem. Connected UI/UX, product, and engineering decisions to deliver consistent, maintainable customer workflows.
Senior Software Engineer at Flight Centre Travel Group
February 1, 2022 - May 31, 2023
Delivered and improved complex React/Next.js customer experiences using Styled Components, Storybook, Node.js APIs, and AWS serverless integrations. Helped deliver new Holidays interface and backend integration that increased revenue by 10% for Flight Centre’s most profitable online product. Introduced Cypress E2E testing to the frontend and CI/CD pipelines, reducing manual testing and improving delivery confidence, and mentored engineers on QA, pull-request workflow, and frontend quality standards.
Senior Software Engineer, Front End at BetMakers Technology Group
January 1, 2021 - August 31, 2021
Rebuilt customer-facing betting applications and internal administration interfaces using TypeScript, React, Redux Toolkit, Material UI, Sass, HTML5, and CSS3. Helped revamp the online racing experience, increasing traffic and conversion by 20% and supporting third-party widgets that lifted affiliate revenue by 12%. Mentored junior developers while improving reusable frontend implementation practices.
Senior Software Engineer at University of Queensland
January 1, 2020 - January 31, 2021
Built a greenfield React/React Native mapping application and migrated legacy student applications to React, Node.js, and AWS serverless. Delivered complex interfaces using TypeScript, Redux Toolkit, Material UI, HTML5, CSS3, and GIS libraries across desktop and mobile-oriented experiences.

Education

Bachelor in Software Engineering and Electronics at University of Buenos Aires, Argentina
January 11, 2030 - July 29, 2026

Qualifications

Add your qualifications or awards here.

Industry Experience

Government, Travel & Hospitality, Financial Services, Education, Software & Internet, Professional Services, Other