Jeo Vincent C.
Rating
Language proficiency level
CV
Senior Full Stack Engineer with 8+ years of experience building scalable, secure, and high-performance applications across web, mobile, and AI-powered systems.
Strong expertise in backend architecture, RESTful & event-driven API design, and seamless integration with modern frontend and mobile applications. Strong focus on delivering production-grade systems that support complex business logic, third-party integrations, and real-time workflows at scale.
Strong experience in database design, optimization, and scaling for high-volume systems, with emphasis on performance tuning, efficient data modeling, and safe production migrations.
Strong proficiency in building responsive web applications and mobile-ready solutions, ensuring high performance, clean UI architecture, and excellent user experience across platforms.
Strong hands-on experience integrating AI-powered features into production systems, including LLM-based applications, intelligent automation, and data-driven decision systems, with focus on reliability, cost control, caching strategies, and safe outputs.
Strong background in Agile development, CI/CD pipelines, automated testing (unit, integration, end-to-end), and cloud deployment workflows, ensuring stable and maintainable production systems.
Strong ability to collaborate with cross-functional teams including product managers, designers, QA engineers, and stakeholders, translating requirements into clear, scalable technical solutions.
Strong focus on clean architecture, distributed systems, AI-driven product engineering, and building user-centric applications that deliver measurable business value.
Skills and abilities
Programming
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AI & Machine Learning
from 20 USD for hour
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AR & VR Development
from 20 USD for hour
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Bot Development
from 15 USD for hour
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C & C++
from 15 USD for hour
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C#
from 15 USD for hour
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Content Management Systems
from 15 USD for hour
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Data Parsing
from 15 USD for hour
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Databases & SQL
from 15 USD for hour
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Desktop Apps
from 15 USD for hour
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Embedded Systems & Microcontrollers
from 15 USD for hour
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Gaming Apps
from 15 USD for hour
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HTML & CSS
from 15 USD for hour
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Java
from 15 USD for hour
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Javascript and Typescript
from 15 USD for hour
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PHP
from 15 USD for hour
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Python
from 15 USD for hour
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Web Programming
from 15 USD for hour
Services
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AI Consulting
from 15 USD for hour
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Content Management
from 15 USD for hour
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Cybersecurity & Data Protection
from 20 USD for hour
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Data Processing
from 20 USD for hour
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Enterprise Resource Planning (ERP)
from 20 USD for hour
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Online Stores & E-commerce
from 20 USD for hour
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Payment Systems Integration
from 20 USD for hour
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Website Development
from 15 USD for hour
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Website Maintenance
from 15 USD for hour
Promotion
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Search Engine Optimization (SEO)
from 15 USD for hour
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Website SEO Audit
from 15 USD for hour
Mobile development
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App Development for Android
from 15 USD for hour
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Apps for iOS (iPhone and iPad)
from 15 USD for hour
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Hybrid Mobile Apps
from 15 USD for hour
Administration
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DevOps
from 15 USD for hour
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Linux & Unix
from 15 USD for hour
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Software & Server Configuration
from 15 USD for hour
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System & Network Administration
from 15 USD for hour
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Windows
from 15 USD for hour
Outsourcing & consulting
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Client Management & CRM
from 15 USD for hour
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Project Management
from 15 USD for hour
Portfolio
- All works 12
- Online Stores & E-commerce 1
- Web Programming 6
- AI & Machine Learning 1
- Hybrid Mobile Apps 4
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WheelGo
Hybrid Mobile AppsTaxi application built for customers, drivers, and agencies, designed to manage the full ride-hailing workflow in a single platform.
The system includes separate roles for customers to book rides, drivers to accept and manage trips, and agencies to oversee operations, assign drivers, and monitor performance. The app supports real-time ride tracking, trip status updates, and smooth communication between all parties.
… I developed the mobile application using Flutter, ensuring a consistent experience across Android and iOS. The focus was on performance, clean UI/UX, and fast interactions even under real-time updates.
The platform includes key features such as ride request and acceptance flow, driver availability management, fare calculation, trip history, and location-based matching using maps integration.
The architecture was designed to be scalable and maintainable, allowing future expansion such as payments, promotions, analytics dashboards, and advanced dispatching logic.
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Amix Agency
Web ProgrammingDeveloped a full-stack AI-powered multimedia generation platform that enables users to create videos and images directly in the browser using advanced generative models. The application provides a streamlined, interactive UI where users can submit text prompts, upload reference images, and customize generation settings.
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Deliveroo Platform
Web ProgrammingDeliveroo is an on-demand food delivery platform connecting customers with local restaurants and riders through a seamless digital experience.
Goal:
To make high-quality restaurant meals accessible anytime, anywhere, by bridging the gap between customers craving convenience and restaurants seeking expanded reach.
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Solution:
Deliveroo built a data-driven platform featuring real-time order tracking, optimized delivery routing, and personalized restaurant recommendations. The system integrates with restaurant POS systems and uses predictive algorithms to match orders efficiently with nearby riders.
Impact:
The platform has transformed urban dining by reducing delivery times, increasing restaurant sales, and creating flexible earning opportunities for riders. It has become a global leader in the food delivery space, known for its reliability, speed, and user experience.
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1500 USD Saphyroo Dashboard
Web ProgrammingEnhanced front-end performance by optimizing change detection, lazy loading, and
caching strategies.
Collaborated with design, QA, and engineering teams to align requirements and deliver
polished features.
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OneGreenWay – Sustainability & Lifestyle Platform
Web ProgrammingOneGreenWay is a sustainability-driven platform focused on promoting eco-friendly living and community engagement. I contributed to front-end enhancements using Next.js, improving responsiveness, accessibility, and performance metrics. I also worked on the backend to ensure reliable API delivery for articles, events, and community features, supporting scalability and international localization.
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Cmax – Real Estate Marketplace
Web ProgrammingCmax is a modern real estate marketplace designed to connect property buyers, sellers, and brokers across Pakistan. I contributed to building a responsive web platform using React and Node.js, implementing advanced property search filters, image galleries, and real-time listing updates. The system was designed for scalability with optimized database queries and REST APIs to support thousands of concurrent users. The result was a seamless and fast user experience for property discovery and lead generation.
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2000 USD AI Video generator
AI & Machine LearningThe final application allows users to quickly generate AI-driven videos from simple inputs, preview them on any device, and export them for use in presentations, social media, or creative projects. The project demonstrates effective use of .NET MAUI, Blazor Hybrid, REST API integration, and multimedia handling in a real-world AI scenario.
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Hareemitg – E-Commerce Platform
Online Stores & E-commerceHareemitg is a full-featured e-commerce website focused on providing a modern shopping experience for a wide range of consumer products. I worked on building the end-to-end shopping flow, including catalog management, cart functionality, secure payments, and order tracking. The platform was powered by a Node.js backend with a React front-end, using TypeScript for better type safety. I also implemented backend caching and content delivery optimizations to improve loading speed and checkout performance.
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NFT-Lottery – Decentralized Raffle / Lottery Web App
Web ProgrammingI worked on the NFT-Lottery web application which provides a decentralized raffle experience for users. My focus was on the user interface and integration layers: enabling wallet connections, fetching lottery status data from blockchain APIs, and presenting lottery rounds and prize info in a performant, responsive UI. By optimizing state management and API error handling, we ensured smooth transitions and real-time updates even under heavy usage.
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Afrosmeet – Black Dating App
Hybrid Mobile AppsAfrosmeet is a global dating app built for the Afro-diaspora community, enabling users to connect locally and internationally. I contributed to both frontend and backend development, focusing on profile management, real-time chat, and location-based discovery features. The app integrates secure authentication, media uploads, and in-app purchases, and it was optimized for performance and stability across both Android and iOS platforms.
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Intellistrata – Supplier Portal
Hybrid Mobile AppsIntellistrata Supplier Portal is a mobile solution for vendors to manage supply chain operations and order workflows. I worked on mobile architecture using React Native and integrated it with a Node.js backend API. The app includes real-time notifications, data synchronization, and analytics dashboards for tracking supplier performance.
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MoneySuperMarket App
Hybrid Mobile AppsMoneySuperMarket is a financial comparison and savings platform designed to help users make smarter financial decisions. Its goal is to empower individuals to save money on essential services like insurance, loans, credit cards, energy, and broadband, while also improving their overall financial wellbeing.
The platform offers a unified web and mobile experience where users can compare quotes from multiple providers, monitor their credit scores, and access personalized financial insights. It also features an integrated rewards system, the SuperSaveClub, which offers cashback and exclusive perks for eligible purchases. Behind the scenes, the system uses a robust backend that manages secure data aggregation, partner integrations, and real-time quote delivery.
… MoneySuperMarket leverages advanced analytics and machine learning models hosted on Google Cloud to enhance personalization and marketing intelligence. The migration of its analytics and ML pipelines to scalable cloud infrastructure significantly reduced deployment times—from hours to just minutes—enabling faster insights and improved customer engagement.
The impact of the platform has been transformative: millions of users now access transparent, data-driven financial comparisons that help reduce costs and improve access to better financial products. At the same time, its scalable architecture and cloud-based systems have strengthened business efficiency and sustained the platform’s position as a leader in the digital financial marketplace.
Reviews and compliments on completed projects 4 2
23 March
350 USD
Taxi app
I had a great experience working with freelancer Jeo Vincent Carretas on updating my taxi app files. From the very beginning, communication was clear, professional, and fast. They understood exactly what needed to be done and handled all updates efficiently.
The freelancer demonstrated strong technical skills, fixed issues quickly, and ensured everything was working smoothly without errors. They were also very responsive, patient, and willing to explain details when needed.
I especially appreciated their reliability and responsibility — the work was delivered on time and exceeded my expectations. I now feel much more confident about my project moving forward.
Highly recommend this freelancer to anyone looking for quality work, especially for app development and technical updates. I will definitely work with them again!
Its amazing!!! Thank you!
6 March
3300 USD
Complete copy of all program functions plus the source code for it
The project wasn't completed, but the contractor tried hard to get it done, so I'm not deducting any marks for their attempt. They always responded to messages. The project just turned out to be very challenging.
13 February
1650 USD
Changes to the main project
Part of the project is completed, the rest remains to be finalized.
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| Personal | Response review
17 December 2025
400 USD
Set up instagram webhook to my application. - нужен разработчик, который уже работал с InstagramAPI
Persen said that he had experience in the Instagram API. But actually, he did not, since his opinion changed during development. And finally, he did not provide the promised solution.
11 November 2025
220 USD
Amix
The performer demonstrated a good level of professionalism and understanding of technical tasks. They were always in touch and ready to promptly discuss project details. The work is progressing, and progress and interest in the result are visible. In some moments, I would like more attention to visual quality and accuracy of execution according to the technical specifications, but overall the interaction is positive and constructive.
I hope for the successful completion of the MVP and further cooperation within Amix Agency.
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23 October 2025
200 USD
We are looking for a developer to create a website for Amix Agency.
I don't understand what he did yet. But I will hope that he finishes everything I need.
Activity
| Latest proposals 10 | Budget | Added | Deadlines | Proposal | |
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New store on Woocommerce
2320 USD
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Email address search automation
547 USD
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Website for a wholesale hair store
670 USD
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Development of the AM Mobility platform (car service, parking, insurance, car rental)
17 400 USD
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I am looking for a developer of AI agents and automation for business.
1000 USD
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Prepare the website for launch wp+woo
1624 USD
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Need to extract POST / GET / PUT requests from the TikTok mobile application urgently.
27 USD
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Improve the website menu and HTML pages
400 USD
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Development of a photo book and photo frame constructor website
300 USD
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Full-stack development
3500 USD
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