Full Stack Developer, Software DeveloperFull Stack Developer, Software Developer
John
ID Verified$1500
per month
($9/hour)
Profile Description
Highly experienced and results-driven Full Stack Developer specializing in fast, scalable, and AI-powered web applications. Proficient in modern tech stacks, including React, Next.js, Node.js, and TypeScript, with expertise in designing responsive, SEO-optimized frontends. Skilled at developing secure, high-performance backend systems using Express, PostgreSQL, MongoDB, and Firebase. Committed to clean architecture, automation, and leveraging advanced technologies like real-time AI, voice proces...
Top Skills
Skills & Expertise
Skill Levels Explained:
💡 Hover over any skill level to see exact years of experience
AI & Automation
Software Development
E-commerce & Marketplace
Work Experience
Lead Full Stack Developer
Callexa
Jun 2025 - Sep 2025
Key Achievements:
Challenge: The organization required a real-time, sophisticated AI voice agent capable of immediate comprehension, understanding, and response. Implementation: Architected and implemented a complete real-time conversational AI bot utilizing Next.js, Node.js, Express, Twilio Media Streams, Deepgram, OpenAI, ElevenLabs, Supabase, and AWS/Vercel. Developed core logic for sentence boundary detection to ensure synchronized speech and seamless streaming responses. Engineered the Pathway Builder, a proprietary tool enabling users to define and customize conversational workflows without code. Designed and implemented a highly optimized bi-directional audio pipeline for low-latency live voice communication. Results: Successfully deployed a fully operational real-time AI voice system currently utilized for business process automation and enhanced customer service operations. Achieved a fluid, natural conversation flow characterized by minimal latency. Empowered businesses to construct bespoke voice workflows autonomously.
Junior Front End Developer
Servebeez
Mar 2025 - Jun 2025
Key Achievements:
Challenge: The existing platform required a modern, high-performance landing page and the optimization of administrative and service provider dashboard interfaces. Implementation: Spearheaded the design and development of the new landing page utilizing Next.js, ensuring optimal speed and responsiveness. Collaborated with lead developers to significantly enhance the usability and workflow of the provider and admin dashboards. Operated within a monorepo structure encompassing the API, admin, provider, and landing modules to maintain consistent version control and streamline deployment. Leveraged the T3 Stack (Next.js, TypeScript, Tailwind, tRPC) and Supabase to facilitate rapid, scalable application development. Results: Successfully delivered a highly optimized landing page, leading to improvements in page speed metrics and user engagement. Achieved greater dashboard operational efficiency, resulting in smoother day-to-day business processes. Enhanced overall platform maintainability through the implementation of superior structural organization and strict type safety.
Full Stack Developer
Freelance Project
Jun 2024 - Jan 2025
Key Achievements:
Challenge: The client required a comprehensive, automated system for end-to-end attendance tracking, precise payroll computation, and efficient employee notification management. Implementation: Architected and deployed a full-stack platform utilizing Next.js (frontend), Node.js and Express (backend), hosted on AWS EC2. Secured the application through the implementation of JWT (JSON Web Tokens) in conjunction with OAuth 2.0 for robust authentication. Integrated third-party services including Sinch SMS, Nodemailer, and OneDoc to facilitate automated notifications and digital document processing. Developed sophisticated features such as QR code-based attendance capture, real-time logging, and a comprehensive analytical dashboard for key metrics. Results: Significantly optimized Human Resources (HR) operations, resulting in a substantial reduction in manual labor. Enhanced data integrity and reporting accuracy through the deployment of automated processing systems. Delivered a high-availability platform with demonstrably optimized backend performance and stability.
Junior Full Stack Developer
Poshsidekick
Sep 2023 - Feb 2024
Key Achievements:
Challenge: The existing SaaS platform required substantial enhancements to its mobile application stability, administrative tool functionality, and overall system performance. Implementation: Re-engineered and maintained the SaaS mobile application utilizing React Native, effectively resolving critical performance bottlenecks and rectifying UI/UX defects. Optimized the administrative control panel through the implementation of Next.js, resulting in improved data management, enhanced user administration capabilities, and increased system responsiveness. Conducted extensive refactoring of core code modules to significantly improve code maintainability and application scalability. Managed and maintained AWS/Firebase server infrastructure, executing query optimizations and ensuring continuous infrastructure stability. Quantifiable Results: Achieved and sustained a service availability of 99.9% uptime, leading to a reduction in user-reported issues and a significant improvement in application speed and reliability. Facilitated accelerated feature deployment through the establishment of a cleaner architectural design and streamlined development workflows. Reduced the volume of customer service technical inquiries through proactive issue resolution and enhanced support mechanisms.
Quick Stats
Education
Bachelor's Degree
Cavite State University
2021 - 2025