Johnny – .NET Core, C#, Angular

It's a student and tuition management system that streamlines the entire student lifecycle, from enrollment to tuition billing and payment reconciliation.

• Defined functional and technical specifications and business requirements;
• Ensured seamless integration with banking and financial gateways;
• Generated invoices, processed payments, and handled reconciliations;
• Provided real-time insights into student payments and account balances;
• Enabled automated alerts for overdue payments via email/SMS;
• Implemented OAuth2 & JWT for role-based access control;
• Deployed a scalable, highly available solution on GCP using Docker Swarm.

It's a cloud-native transportation management system designed to optimize end-to-end freight operations for e-commerce carriers.

• Architected a multi-tenant system from scratch, setting development standards and patterns tailored to business objectives.;
• Modeled and optimized database schemas through techniques like partitioning and indexing, and integrated Redis caching to enhance performance;
• Designed and developed critical REST and event-driven endpoints using RabbitMQ, enabling parallel processing and sub-second logistics tracking;
• Applied CQRS, DDD, and circuit-breaker patterns to improve fault tolerance and system resilience;
• Integrated real-time tracking and dynamic routing algorithms to shorten delivery times and increase operational efficiency;
• Built data pipelines to BigQuery and Power BI, empowering stakeholders with live dashboards and actionable supply-chain insights;
• Established automated build-test-deploy pipelines with GitLab CI, Azure DevOps, Docker, and Kubernetes, achieving zero-downtime releases and faster time-to-market;
• Connected with Google Maps API, payment gateways, and logistics partners to enrich the driver and shipper experience;
• Developed a responsive, component-driven Angular front end.

It's a driver-focused delivery platform that simplifies courier onboarding with background checks, automated document validation, and quick payment setup.

• Led workshops with operations, legal, and product teams to map end-to-end courier workflows;
• Documented business, security, and compliance requirements for background checks and document handling;
• Defined and prioritized a three-step validation flow and designed multi-vehicle support to enable flexibility for diverse courier fleets;
• Designed the domain model and API contracts for courier profiles, document status tracking, and payout definitions;
• Integrated third-party background-check service and implemented secure callbacks to update driver status in real time;
• Architected a .NET, OAuth2-secured back end;
• Developed REST endpoints and data-validation pipelines for document uploads, OCR parsing, and status transitions;
• Created user interface using React, working closely with the UX/UI team;
• Established CI/CD pipelines to promote quality and accelerate releases;
• Provided and deployed the cloud infrastructure using Google Cloud Platform.

It's a SaaS solution that automates invoicing, payments, and compliance for affiliate programs across diverse industries.

• Designed a scalable domain model supporting 400K+ affiliates, multi-entity accounting, and customizable commission structures;
• Specified RESTful API contracts and OpenAPI definitions for affiliate management, invoicing, payment scheduling, and reconciliation workflows;
• Architected a cloud-native, microservices-inspired backend in .NET Core with Angular-based multi-tenant admin and member UIs;
• Developed core modules for affiliate registration, multi-currency invoicing, tax calculation, and dispute resolution;
• Implemented event-driven transaction workflows using RabbitMQ to decouple invoice generation, payment capture, and notifications;
• Integrated multiple payment gateways and bank APIs for automated bulk payouts, split-payments, and real-time status tracking;
• Optimized multi-tenant database schemas with indexing, partitioning, and Redis caching to support high-volume financial transactions with sub-second latency;
• Built dynamic, role-based Angular dashboards for real-time KPI tracking, payout rule configuration, and transaction history analysis;
• Set up CI/CD pipelines via Azure DevOps and GitHub Actions for automated testing and zero-downtime deployments;
• Wrote comprehensive unit and integration tests covering all critical financial logic;
• Instrumented Grafana dashboards to monitor transaction volumes, success rates, and error trends by affiliate segment.