James Hart
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Senior Full Stack Developer & Web/Android/ERP/CRM/CMS/AI(ML)/Blockchain/...
Dynamic and solutions-focused Senior Full Stack Developer with over 12 years of experience in delivering transformative software solutions for web, and control panel design. Expertise in PLC programming, SCADA systems, mobile, and blockchain ecosystems.
Skilled in developing cross-platform mobile applications, implementing DevOps strategies, alongside advanced QA methodologies to ensure seamless functionality and reliability and and QA frameworks and creating AI/ML-driven solutions for real-time analytics and business intelligence.
Demonstrates expertise in Web3 technologies, blockchain-based systems, ERP/CRM integrations, and e-commerce platforms.
Known for designing scalable cloud-native architectures and driving innovation through microservices and DevOps pipelines.
Proven expertise in managing Google Ads, Facebook Ads, and SEO campaigns while ensuring quality project delivery across WordPress and E-commerce platforms.
Adept at collaborating with diverse teams to deliver high-performance applications that align with business goals. Recognized for strategic problem-solving, mentoring capabilities, and a passion for leveraging emerging technologies to optimize processes and enhance user experiences.
Career Highlights:
Spearheaded blockchain solutions integrating smart contracts with Web3.js for secure financial platforms.
Achieved a 35% increase in mobile engagement by developing Flutter-based cross-platform apps for enterprise and retail clients.
Designed cloud architectures on AWS and Azure, reducing operational costs by 40% and improving disaster recovery capabilities.
Built AI-driven platforms for predictive modeling and real-time analytics, boosting data processing efficiency by 60%.
Developed and deployed scalable e-commerce platforms, integrating payment gateways and live user engagement features.
Enhanced ERP/CRM workflows by implementing tailored solutions using Odoo, Zoho CRM, and SAP, automating business processes for mid-sized enterprises.
Senior Full Stack Developer, CT Innovations 03/2021 – 02/2024London, United Kingdom
•Architected & Deployed SaaS Platform: Developed a robust, cloud-based enterprise platform using React.js, Node.js, and AWS, enabling real-time data analytics and automation, which improved client retention by 40%.
•Developed a full-stack e-commerce website with Python (Django) and React.
•Designed and implemented QA automation frameworks using Selenium, Cypress, and Appium to streamline testing processes and reduce defect rates by 60%.
•Managed Bitrix box version projects, performing technical support and feature customization.
•Managed Google Ads and Facebook Ads campaigns, achieving optimized ROI through data-driven insights and recommendations.
•Implemented comprehensive SEO strategies to boost search engine visibility.
•Integrated eCommerce systems such as Shopify, WooCommerce, and Magento, optimizing for sales conversion and secure payment processing.
•Microservices Implementation: Designed a microservices architecture with Kubernetes and Docker, ensuring scalability, high availability, and modularity, reducing downtime by 35%.
•Web3 Integration & Blockchain Solutions: Designed and deployed blockchain applications using Solidity, Web3.js, and Ethereum smart contracts to enable secure financial transactions and NFT marketplaces.
•Mobile Development: Built Flutter-based mobile apps integrated with blockchain wallets like Metamask, improving user interaction by 40%.
•Led the design, development, and deployment of several cross-platform mobile applications using Flutter, Dart, and Kotlin, delivering high-quality, scalable solutions.
•Cloud Infrastructure Management: Architected cloud-native solutions using AWS (EC2, S3, Lambda) and Kubernetes, ensuring scalability and high availability.
•AI-Driven Analytics: Implemented machine learning models for customer behavior prediction, leading to a 25% improvement in retention rates.
•DevOps Automation: Automated CI/CD workflows with Jenkins and Terraform, cutting deployment times by 50% and ensuring seamless updates.
•Integrated SCADA systems for real-time data acquisition, visualization, and remote monitoring, reducing manual interventions and improving response time by 30%.
•Directed a team of 5 engineers and technicians, ensuring smooth project execution, on-time delivery, and adherence to safety protocols and industry standards.
Full Stack Developer, TechSphere Solutions 01/2019 – 02/2021Manchester, United Kingdom
•Built Web3 applications and integrated Ethereum-based smart contracts into financial platforms, ensuring secure and transparent transactions.
•Built and executed automated test suites for web applications using Python’s Pytest and Selenium WebDriver, reducing manual testing efforts by 70%.
•Developed and maintained AI-driven web applications using Python, Django, and Flask, providing real-time analytics and data visualization.
•Developed and maintained Android applications using Kotlin and collaborated on Flutter-based apps for both Android and iOS.
•Developed HTML5-based web games using Phaser.js and WebGL, with a focus on performance optimization and cross-platform compatibility.
•Implemented and optimized Bitrix-based intranet for a multinational company.
•Resolved performance bottlenecks and integrated third-party services.
•Designed and implemented NFT-based web games on Ethereum, allowing players to trade in-game items on a blockchain marketplace.
•Customized ERP and CRM platforms such as Salesforce and Zoho CRM and Microsoft Dynamics, enhancing business automation and sales management workflows.
•Led DevOps automation projects, utilizing Docker, Kubernetes, and Jenkins to streamline development and deployment.
•Coordinated cross-functional teams (SEO, Content, Analytics, Development) to ensure quality deliverables within project timelines.
•Organized feature requests, prioritized sprint tasks, and managed project progress with tools like Trello or Jira.
•Delivered high-quality eCommerce solutions using Shopify and WordPress, integrating custom plugins and payment gateways for seamless customer experiences.
•AI-Powered Analytics Tools: Built predictive models using TensorFlow and PyTorch, reducing data analysis time by 60% and improving accuracy for business forecasts.
Junior Full Stack Developer, InnovateTech Solutions 10/2014 – 12/2018 Kuala Lumpur, Malaysia
•Assisted in full-stack development with Node.js, PHP, and JavaScript, contributing to front-end and back-end development of web platforms.
•Gained foundational experience in mobile development, learning Kotlin, Flutter, Java, and using Android Studio for app development.
•Assisted in QA testing for Java-based enterprise tools, using JUnit for unit testing and Selenium for browser-based testing.
•Automated QA workflows using tools like Jenkins, enhancing build and test cycles.
•Worked on Java Swing desktop applications for internal data processing and automation, enhancing user interfaces and workflows for enterprise clients.
•Assisted in developing 2D browser-based games using HTML5 Canvas and JavaScript, learning key techniques in game physics, rendering, and animation.
•Gained hands-on experience with Phaser.js for developing interactive games with real-time game mechanics and event handling.
•Contributed to ERP system integrations, improving business management and operations for small to medium enterprises.
•Integrated ERP solutions using Odoo and Zoho CRM, streamlining business operations for clients in the logistics and retail sectors.
•Supported the development and deployment of PLC automation systems, working with Siemens S7 for manufacturing clients.
•Conducted troubleshooting and optimization for existing PLC systems, achieving a 20% reduction in maintenance costs.
•Contributed to the integration of PLCs with SCADA systems for data acquisition and system monitoring.
Skills
Programming
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AI & Machine Learning
from 35 USD per hour
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Bot Development
from 35 USD per hour
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C & C++
from 35 USD per hour
- C#
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Content Management Systems
from 35 USD per hour
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Cryptocurrency & Blockchain
from 35 USD per hour
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Data Parsing
from 35 USD per hour
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Databases & SQL
from 35 USD per hour
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Desktop Apps
from 35 USD per hour
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Embedded Systems & Microcontrollers
from 35 USD per hour
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Gaming Apps
from 35 USD per hour
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HTML & CSS
from 35 USD per hour
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Java
from 35 USD per hour
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Javascript and Typescript
from 35 USD per hour
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PHP
from 35 USD per hour
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Python
from 35 USD per hour
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Testing & QA
from 35 USD per hour
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Web Programming
from 35 USD per hour
Design & art
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Interface Design (UI/UX)
from 35 USD per hour
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Mobile Apps Design
from 35 USD per hour
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Web Design
from 35 USD per hour
Services
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AI Consulting
from 35 USD per hour
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Content Management
from 35 USD per hour
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Customer Support
from 35 USD per hour
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Cybersecurity & Data Protection
from 35 USD per hour
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Data Processing
from 35 USD per hour
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Enterprise Resource Planning (ERP)
from 35 USD per hour
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Information Gathering
from 35 USD per hour
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Online Stores & E-commerce
from 35 USD per hour
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Payment Systems Integration
from 35 USD per hour
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Tuition
from 35 USD per hour
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Website Development
from 35 USD per hour
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Website Maintenance
from 35 USD per hour
Promotion
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Search Engine Optimization (SEO)
from 35 USD per hour
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Website SEO Audit
from 35 USD per hour
Architecture
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Engineering
from 35 USD per hour
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Mechanical Engineering & Instrument Making
from 35 USD per hour
Mobile development
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App Development for Android
from 35 USD per hour
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Apps for iOS (iPhone and iPad)
from 35 USD per hour
Administration
Outsourcing & consulting
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Client Management & CRM
from 35 USD per hour
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Consulting
from 35 USD per hour
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Project Management
from 35 USD per hour
Translation
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English
from 35 USD per hour
Writing
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AI Content Creation
from 35 USD per hour
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Script Writing
from 35 USD per hour
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Technical Documentation
from 35 USD per hour
Portfolio
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6000 USD scandinavianbiolabs.com
This project involved creating a Vue-based single-page application to replace the standard Shopify customer back end. It required REST and GraphQL API integration to Shopify core and recharge subscription services. The new implementation allows customers to add, swap, reschedule, change, cancel, remove, and skip products and subscriptions.
I created a Shopify-embedded UI tool for visitors to upload photos of their hair and scalp. This solution analyzes the images through an AWS-based AI model that determines hair issues that can be treated with company products. This tool is a Vue-based UI with AWS API integration that sends photos to the AI model.
A tool that integrates SurveyJS into a Shopify app wrapper, offering a Shopify quiz generator. The solution was implemented as a Vue-based front end with metadata created by the survey back end. In addition, data is stored leveraging MongoDB.
I created a Vite-based Shopify theme deployment setup, enabling project bundling and deployment in seconds over multiple different country shops. This resulted in a distinguished setup with dynamic imports to reduce JavaScript page load and individual script loads.
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5000 USD Empower your Business with Sustainable Product Impact Management
In a transformative journey spanning three months, I spearheaded the revival of a faltering project centered on "The first integrated and collaborative web solution for sustainability assessment" using Odoo. Faced with a legacy of erroneous code from the prior team, my dedicated efforts led to a remarkable turnaround. I methodically addressed a myriad of bugs that had permeated the system, instilling stability and functionality into the solution.
With persistent and meticulous debugging, I orchestrated a profound transformation, converting a chaotic landscape of issues into a coherent and reliable tool. This triumphant evolution culminated in the deployment of the rejuvenated solution to esteemed clients, including industry giants like Disney, who recognized its value.
… My contribution to this project exemplified a rapid and comprehensive redemption, underlining my prowess in problem-solving and technical acumen. The successful deployment of the revitalized tool stands as a testament to my adeptness in steering complex projects toward success, even in the face of substantial challenges.
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6000 USD Implement Odoo Enterprise in a Multi-company Environment
Creative Media, a group of companies focused on web content and advertising campaigns, faced challenges while implementing Odoo in a multi-company setup. I stepped in and expedited their progress, helping them achieve their targets within weeks instead of months. Through my expertise in Odoo implementation and customization, I provided strategic guidance, streamlined their processes, and ensured smooth operations across their multiple entities. By leveraging my knowledge and experience, I enabled Creative Media to maximize the potential of Odoo, accelerating their growth and delivering tangible results in a remarkably short timeframe.
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3500 USD MySpecialist
Created a platform that allows people to get in contact with specialized workers. Basically, you can make an inquiry on the website saying, for example, that you want a plumber, you say what language you speak and where you live, and the system matches you with available workers in your area. From then on, everything is handled by the system to make sure you are satisfied with the worker's work.
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5000 USD Nanoramic Laboratories Odoo Implementation
Nanoramic Laboratories uses Odoo to handle day-to-day tasks across the company. I was hired to customize Odoo to the extreme, creating new views dedicated to custom needs, creating reports, and integrating with the company's third-party utilities like Slack or AWS.
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5000 USD McCreery's Home Furnishings
I implemented three modules in Odoo (a full-stack application framework based on Python, SQL, and HTML/JS/CSS) for McCreery's Home Furnishings.
The first module allowed customers to request quotes for furniture.
The second module allowed the client to gather customer information in multiple stages, instead of requiring the customer to fill out an entire form (that resulted in lost leads).
The third module allowed the client to import their previous Wordpress blog to Odoo. This was by far the most complex project since it involved heavily processing the Wordpress content to make it compatible with Odoo's expected file format.
… I implemented these three modules despite never having worked with Odoo before, and the client's systems engineer was surprised by my fast turnaround time.
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5000 USD Univates CMS
Univates is a university in the south of Brazil that has graduated over 25,000 students since 1969. I joined the marketing team and created a custom CMS platform for web campaigns, including the main website. It brought several benefits for the team and the institution, such as the flexibility to create personalized designs, faster page loads, unification of different CMS solutions across websites, autonomy for other sectors to keep their content updated on the web, and easier integration with academic and other third-party software.
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5000 USD Mobile and Web Applications
Mobile and web applications to scan receipts. The tech stack included a React front end, a React Native mobile application (Android and iOS), and a Python back end (Django). I worked on all components and managed and fully migrated the infrastructure to Terraform (on AWS).
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5000 USD eCommerce Platform Rehaul
One of the biggest eCommerce platforms in Israel. I was responsible for planning and executing the full migration of a legacy eCommerce platform to a new cloud provider and tech stack. I set up and led the back-end and DevOps teams and moved on to an enterprise architecture role. We seamlessly migrated from on-premise to AWS Europe and then from AWS Europe to AWS Israel without major downtime or data loss. The full infrastructure was managed in Terraform Cloud. The tech stack included Symfony (PHP), Flask (Python), and Angular applications.
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5000 USD Vip Box CRM
A CRM web app for employees and users of Vip Box, a photo booth rental company. Users of the app can set up, edit, and consult event information and photos. The app uses a Photoshop-like JavaScript tool that has a set of templates created by Vip Box. The templates are fully editable and can be saved in the user's list of creations.
Before an event, the user can create a custom template for photos that will be printed at the event. On event day, the photo booth is automatically set up with all the relevant information. At the end of the event, all pictures are automatically synced into an online bucket and can be displayed, managed, and shared through the user interface. All of this can be administered by employees using basic CRM tools.
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8000 USD Quintessentially
Quintessentially Group is a British concierge company founded in 2000. The company is headquartered in London and operates 60 offices worldwide. It is a members-only luxury lifestyle management platform providing services such as travel bookings, restaurant recommendations, and event access. The group includes 16 brand services, including travel, events, estates, and Quintessentially Foundation.
I conducted numerous consultations and workshops around requirements to ascertain the best fit for Quintessentially. Many of their future marketing plans focused on content creation, automation, and CRM integration; therefore, I proposed Kentico CMS as the perfect fit. I also provided a clear business case for Kentico, outlining how it would streamline their marketing activity and ultimately enable cost savings through reduced software integrations.
… The new Kentico CMS website has provided Quintessentially with a robust, easy-to-edit CMS system that has significantly enhanced its online presence.
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7000 USD Jovian Archive
A media eCommerce website selling pay-per-view access to educational media.
As the lead developer, I was in charge of the implementation of the public site as well as the custom CMS and back-end services deriving the service. I also integrated a planetary computation library (previously written by me), allowing users to create their birth chart and get access to personalized products and media based on their profile.
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8000 USD Blockchain Multi Safe application
Cryptocurrency & BlockchainMulti Safe is a multi-signature web application that provides the ability to create special groups of users for shared finance management and participate in the existing ones in the NEAR Protocol Blockchain.
I improved the overall quality of the project by implementing critical features and adding new features like batch requests and UX upgrades.
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5000 USD eCommerce Web App
Website DevelopmentThis is a web app selling women's clothing online. As a full-stack developer, I implemented some prominent features, such as a product listing page, product detail page, login page, and search feature. Also, I conducted optimization on the web to improve the user experience.
Activity
Recent proposals 10 | Budget | Added | Terms | Proposal | |
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Help solve display issues in MapLibre
1083 USD
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Website development
2000 USD
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Creating a seating arrangement floorplan application in react typescript
4000 USD
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Website development on WordPress. High requirements!
1500 USD
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Need a developer for Flutter
1500 USD
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Development of MVP for ERP platform
3000 USD
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Creating a sales website for interaction with China
3000 USD
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Layout on NextJS and SCSS
300 USD
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Looking for an SEO specialist to promote a website on Wix
600 USD
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Ruby on Rails developer
600 USD
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