InvoiceGPT is an AI-driven application designed for automated invoice and receipt processing, aimed at both individuals and SMEs. The project involves a mobile app for scanning invoices and an API for third-party integrations. More details and the white paper are available at blake-kellett.com/invoice_gpt_report.html. Microservices Architecture: Designed a scalable system using Golang, employing microservices for flexibility. Developed an HTTP routing server and gRPC-based services for synchronous and asynchronous operations. Async Processing: Implemented RabbitMQ for event-driven processing of file uploads, integrating WebSockets for live communication with the frontend. • Caching & Sessions: Leveraged Redis for caching and session management using JWTs. Developed a mechanism for managing long-lived sessions and manual token invalidation. Ephemeral Design: Built all services as ephemeral (except the database) for simplified maintenance and disaster recovery, the designs incorporated robust error handling, retries, and circuit breakers. Database Management: Utilized MongoDB Atlas for data persistence, employing advanced aggregation pipelines to optimize query performance and reduce latency. API Development: Established a GraphQL API with RESTful endpoints for file uploads and callback URLs for payments and OAuth integration. AI Integration: Hosting Tesseract model for OCR and integrated OpenAI's API for natural language processing (NLP) tasks. File Processing: Employed OpenCV for image preprocessing to optimize files for storage and enhance OCR accuracy. Front-End Development: Currently developing a React Native mobile app for Android and iOS platforms.

A deployed SaaS application designed to create digital product categories utilizing the openPIM API. It leverages modern technologies and best practices to ensure efficiency, scalability, and ease of use. The primary goal of this application was to showcase how one could utilize the openPIM API. For more information, visit cView.io.API and Front-End Development: Developed the primary API service using the MERN stack (MongoDB, Express, React, NodeJS). Utilized NextJS for server-side rendering and improved performance, with TypeScript ensuring type safety. Subscription Management: Introduced and integrated subscription management using the Stripe Node.js SDK and callback functions, enabling flexible billing and seamless payment processing for users. Containerization: Created Docker images to streamline server initialization and integrate seamlessly into the system's cluster, ensuring efficiency and scalability. CI/CD Pipeline: Implemented a continuous integration pipeline through GitLab, automating testing, building, and deployment processes for rapid and reliable updates. Kubernetes Orchestration: Deployed the application in Kubernetes clusters, employing Horizontal Pod Autoscaler (HPA) and Cluster Autoscalers for a scalable solution. Used Helm for Kubernetes package management, facilitating easy updates and rollbacks. Cloud Hosting: Hosted on AWS Cloud to provide a reliable and scalable infrastructure.

openPIM is an open-source product information management (PIM) system, initially developed as an internal tool for a distribution company in South Africa. The project has since evolved into a free, central hub for sharing rich product data. For more details, visit openPIM.io. Microservices Architecture Conversion: Refactored a monolithic Node.js/TypeScript API into a scalable microservices architecture using Golang, improving system performance and handling of high-volume requests. Front-End Development: Developed a React-based platform (Next.js) with TypeScript, focusing on complex forms that manage both local and database storage, allowing for recursive form submissions. CI/CD: Established a GitLab-based continuous integration and delivery (CI/CD) pipeline, automating testing, building, and deployment processes for rapid, reliable updates and easy rollbacks. Kubernetes Optimization: Optimized the system for cloud deployment, reducing resource usage and costs by designing lightweight deployments. Employed Horizontal and Vertical Pod Autoscalers (HPA/VPA) and cluster autoscalers to efficiently manage cloud-based loads. Geo-Location Scaling: Designed the system for geo-location scaling, deploying cluster replicas and MongoDB replica sets to reduce latency and improve global accessibility. Agile Development: Although working independently, I employed agile methodology with continuous feature integration, regular updates, and iterative improvements.

Worked as part of a five-member team (4 developers and a business analyst) to design and integrate a Product Information Management (PIM) feature into an industrial distribution company's existing ERP system. The project involved deploying a new API and upgrading the company's internal infrastructure. API Development: Developed RESTful endpoints and integrated GraphQL using Node.js. Followed test-driven development (TDD) practices to ensure high-quality, reliable code. Collaborated with a front end developer and integrated the API into the company’s existing Django system. Database Management: Migrated the localized SQL database to a MongoDB instance, optimizing performance as data structures grew more complex, making relational databases less efficient. CI/CD: Set up a Jenkins-based continuous integration pipeline for the on-site server, automating testing, building, and deployment to facilitate rapid, reliable updates. Kubernetes Orchestration: Assisted in migrating the monolithic Django system from Docker Compose to Kubernetes clusters. Utilized Helm for package management, streamlining the update process.

Client services:Represented local and international clients as a private consultant, providing contract-based services. Facilitated smooth transitions for ACE Industries' previous clients by guiding them in sourcing and seamlessly integrating with new service providers. Provided advice on drafting tenders and reviewed tender proposals to ensure competitiveness and compliance.Strategic Planning:Orchestrated and led the comprehensive shutdown and liquidation process of Ace Industries post-COVID pandemic, including the development of a strategic plan and timeline to ensure a smooth transition. Legal Compliance: Collaborated with legal counsel to ensure compliance with all relevant laws, regulations, and contractual obligations during the shutdown and liquidation phases. Asset Management:Managed the inventory and disposition of assets, including machinery, equipment, negotiating sales, and overseeing asset transfers or disposals as needed. Stakeholder Communication:Facilitated effective communication with internal and external stakeholders, including employees, suppliers, and clients, providing updates and managing expectations throughout the shutdown process. Team Leadership:Directed and coordinated a team involved in various aspects of the shutdown, delegating responsibilities, providing guidance, and ensuring alignment with the established strategic plan.

Design:Presentation designing of event setups and display stands, as well as creation of production plans and models.Project Management:Led end-to-end project management, overseeing the entire lifecycle from design conceptualization to manufacturing to logistics, ensuring seamless execution and timely delivery.Client Services:Dedicated to providing exceptional client experiences, I effectively communicated with clients to address their needs, alleviate concerns, and build strong, long-lasting relationships, resulting in stress-free collaboration.Material Sourcing:Expertly sourced and procured optimal materials for design projects, while also facilitating knowledge transfer to colleagues, enabling efficient utilization of these materials.Time Management:Proficiently managed production timelines, ensuring each stage of the project was executed promptly, while effectively delegating tasks to team members for streamlined workflow.Presentations:Delivered persuasive and professional presentations to clients, effectively conveying project concepts, progress, and value propositions, contributing to successful project outcomes.