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I am a Senior Full-Stack Software Engineer with 10+ years of experience building and scaling web and enterprise applications. I specialize in JavaScript, Python, PHP, .NET, and Spring Boot, focusing on secure APIs, cloud-ready architectures, and end-to-end system design. I enjoy turning complex requirements into reliable software, and I’ve integrated AI solutions (LLMs, ChatGPT, Python ML) to automate workflows and improve decision-making. My work spans freelance projects on Upwork and enterprise engagements for AXA XL and All in Data, delivering production-ready SaaS apps, data dashboards, and scalable deployment pipelines.…I am a Senior Full-Stack Software Engineer with 10+ years of experience building and scaling web and enterprise applications. I specialize in JavaScript, Python, PHP, .NET, and Spring Boot, focusing on secure APIs, cloud-ready architectures, and end-to-end system design. I enjoy turning complex requirements into reliable software, and I’ve integrated AI solutions (LLMs, ChatGPT, Python ML) to automate workflows and improve decision-making. My work spans freelance projects on Upwork and enterprise engagements for AXA XL and All in Data, delivering production-ready SaaS apps, data dashboards, and scalable deployment pipelines.

Carter Tan

Full Stack Developer, Web Developer, Front-End Developer, +3

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I am a Senior Full-Stack Software Engineer with 10+ years of experience building and scaling web and enterprise applications. I specialize in JavaScript, Python, PHP, .NET, and Spring Boot, focusing on secure APIs, cloud-ready architectures, and end-to-end system design. I enjoy turning complex requirements into reliable software, and I’ve integrated AI solutions (LLMs, ChatGPT, Python ML) to automate workflows and improve decision-making. My work spans freelance projects on Upwork and enterprise engagements for AXA XL and All in Data, delivering production-ready SaaS apps, data dashboards, and scalable deployment pipelines.…I am a Senior Full-Stack Software Engineer with 10+ years of experience building and scaling web and enterprise applications. I specialize in JavaScript, Python, PHP, .NET, and Spring Boot, focusing on secure APIs, cloud-ready architectures, and end-to-end system design. I enjoy turning complex requirements into reliable software, and I’ve integrated AI solutions (LLMs, ChatGPT, Python ML) to automate workflows and improve decision-making. My work spans freelance projects on Upwork and enterprise engagements for AXA XL and All in Data, delivering production-ready SaaS apps, data dashboards, and scalable deployment pipelines.

Available to hire

I am a Senior Full-Stack Software Engineer with 10+ years of experience building and scaling web and enterprise applications. I specialize in JavaScript, Python, PHP, .NET, and Spring Boot, focusing on secure APIs, cloud-ready architectures, and end-to-end system design.

I enjoy turning complex requirements into reliable software, and I’ve integrated AI solutions (LLMs, ChatGPT, Python ML) to automate workflows and improve decision-making. My work spans freelance projects on Upwork and enterprise engagements for AXA XL and All in Data, delivering production-ready SaaS apps, data dashboards, and scalable deployment pipelines.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Full-Stack Developer at Upwork

August 1, 2013 - Present

Full-stack development for AI-powered pricing and recommendation platforms (React, Python, ML); real estate CRM systems with lead analytics (Next.js, Supabase); SaaS products from MVP to production; payments via Stripe and PayPal with subscriptions and webhooks; RBAC admin dashboards; REST & GraphQL API work; JWT/OAuth social login authentication; e-commerce features; data dashboards; database design and optimization (PostgreSQL, MySQL, MongoDB); cloud deployment with AWS, Vercel, Docker, and GitHub Actions; maps, email, and analytics integrations; performance tuning and legacy code modernization.

Senior Full-Stack Developer at AXA XL

February 1, 2021 - June 1, 2025

Led migration of 30+ applications to a modern React/Angular + Spring Boot framework, improving scalability and maintainability; built a custom Spring Boot app generator to accelerate prototyping; designed enterprise frameworks with governance approvals and drove company-wide adoption; developed Active Directory–based permission service; directed a 10+ member engineering team; transitioned CI/CD pipelines from Jenkins/Azure DevOps to Harness & OpenShift, reducing deployment time by 35%.

Senior Software Architect at All in Data

September 1, 2016 - April 1, 2021

Upgraded legacy API to .NET 5 RESTful services, boosting scalability and reducing backend errors; deployed a new backend API for a customer portal, integrating with the existing billing system to accelerate transactions; Dockerized the development environment to speed onboarding; expanded a React UI with additional features and resolved 15+ customer-reported defects to improve UX; created a new React SPA portal from scratch with six initial screens.