Umer – Python, React, Typescript

The project delivered multi‑tenant SaaS solutions for financial crime risk management and fintech data reporting for a UK‑based consultancy’s global clients. It combined external banking and compliance data with large document flows and AI/LLM‑based pipelines so that risk teams could search, analyze, and validate information more quickly and consistently, with human‑in‑the‑loop control where needed.

• Led the architecture, design, and development of greenfield products and digital transformation initiatives from concept through production.
• Partnered with stakeholders to define product strategy, deliver MVPs, and establish short and long-term technical roadmaps.
• Designed and implemented scalable serverless architectures for both backend services and modern React-based frontend applications.
• Built AI-powered solutions using Agentic AI, OpenAI, RAG, LLMs, prompt engineering, document chat, orchestration workflows, and third-party integrations.
• Developed a GPU-accelerated AI de-identification pipeline leveraging OCR and transformer-based data detection, automating the onboarding process.
• Implemented vector embeddings and intelligent caching strategies to optimize LLM performance while significantly reducing OpenAI API costs.
• Developed secure backend APIs with role-based access control (RBAC), authentication, and authorization using AWS Cognito, and data persistence with DynamoDB.
• Designed and deployed cloud infrastructure using AWS CDK, including Lambda, API Gateway, S3, IAM, CloudWatch, CloudWatch RUM, and infrastructure-as-code best practices.
• Established automated CI/CD pipelines using GitHub Actions and CircleCI to streamline testing, deployment, and release management.
• Integrated Stripe payment solutions, including subscriptions, free trials, promotional discounts, and friends-and-family pricing models.

The project delivered and evolved ecommerce applications for a global premium fashion brand, covering storefront, checkout, and account journeys. It focused on smooth product browsing, multi‑provider payment integrations (including 3‑D Secure), and sign‑up, SEO, and analytics capabilities to support conversion and digital performance.

• Designed and implemented secure, high-performance, scalable microservices-based backend APIs to support business-critical services and integrations.
• Designed and developed scalable microservices-based front-end architecture, with modern React.js frontends and multilingual (i18n) support.
• Built and enhanced customer-facing B2C web applications and self-service portals, focusing on performance, usability, and scalability.
• Integrated with external data sources such as Salesforce, etc.
• Ensured compliance with WCAG 2.1 accessibility (a11y) standards to deliver inclusive user experiences.
• Championed engineering best practices through code reviews, mentoring, technical leadership, and close collaboration across cross-functional teams.
• Designed and maintained CI/CD pipelines and deployment workflows, leveraging AWS CDK to provision and manage cloud infrastructure, including Lambda, API Gateway, DynamoDB, S3, CloudWatch, EventBridge, and reusable infrastructure constructs.

The project delivered a security management system for the centralized handling of organizational security policies and procedures. It provided versioned documentation, role‑based access, approval and acknowledgment workflows, and compliance tracking so that security teams could manage and communicate standards more efficiently and consistently.

• Designed and implemented secure, high-performance backend APIs with a focus on scalability, reliability, and maintainability.
• Developed scalable microservices-based frontend applications and responsive user interfaces using modern React.js technologies.
• Built and enhanced B2B platforms, customer portals, and CMS-driven applications powered by Kontent.ai.
• Implemented secure API integrations using TLS/mTLS authentication to ensure encrypted communication between distributed services.
• Established and maintained CI/CD pipelines using GitHub Actions and automated cloud infrastructure provisioning with AWS CDK.

Delivered a diverse portfolio of solutions, including eCommerce platforms, React Native mobile applications, and enterprise web portals, designing and developing scalable, high-performance applications tailored to business and customer needs.

• Integrated multiple payment providers, including Adyen, PayPal, and Klarna, delivering secure and seamless checkout experiences.
• Developed and enhanced core eCommerce features, including product listings, product detail pages, customer reviews, and shopping workflows.
• Designed and implemented micro-frontend architectures with server-side rendering (SSR), Akamai CDN, and a mobile-first approach to optimize performance and scalability.
• Built and maintained scalable microservices-based backend solutions to support high-traffic eCommerce platforms.
• Developed cloud-native solutions using AWS CDK, leveraging Amazon SQS, WebSockets, and real-time messaging for event-driven applications.
• Optimized React applications for performance, improving load times, rendering efficiency, and overall user experience.
• Applied Test-Driven Development (TDD) practices and took ownership of end-to-end feature delivery, from design through deployment.
• Ensured compliance with WCAG 2.1 accessibility (a11y) standards to deliver inclusive and accessible user experiences.
• Promoted engineering excellence through code reviews, mentoring, technical leadership, and collaboration across cross-functional teams to drive best practices and high-quality software delivery.

The project delivered telecom and e-commerce web platforms for a large UK provider, combining CMS‑driven content, enterprise portals, and API‑first services. It focused on smooth online sales and account journeys, performant and accessible React frontends, and scalable integrations that improved customer self‑service and digital conversion.

• Designed and developed the microservice APIs and third-party integrations.
• Optimized React application performance using profiling, code splitting, lazy loading, and modern rendering best practices while ensuring accessibility compliance (WCAG), semantic HTML, and inclusive user experiences.
• Promoted engineering excellence through hands-on development, code reviews, mentoring, and collaboration across cross-functional teams, driving best practices and delivering high-quality software.

The project delivered and evolved a suite of finance, telecom, and ecommerce products, from open banking and credit report services to loan, insurance, and mobile device portals. It focused on modern web and mobile experiences that are secure, performant, and accessible, enabling consumers to manage finances and telecom services online with less friction and more transparency.

• Modernized legacy applications by migrating them to React.js (Redux/Saga), React Native, AngularJS, and Node.js/GraphQL architectures, leveraging AWS Serverless, Lambda, and Step Functions to build scalable, mobile-first solutions.
• Designed and implemented Apollo Federation Gateway to unify distributed GraphQL services into a scalable federated architecture.
• Optimized React application performance using profiling, memoization, code splitting, lazy loading, immutable state management, and Lighthouse performance audits.
• Ensured accessibility compliance by applying WCAG 2.1 best practices, including semantic HTML, ARIA attributes, keyboard navigation, screen reader support, and focus management.
• Developed and integrated solutions with Sitecore, Contentful, and bespoke CMS platforms, including Shopify integrations and custom CRM applications.
• Delivered secure and compliant applications aligned with GDPR requirements and accessibility (a11y) standards.
• Promoted engineering excellence through hands-on development, code reviews, technical mentoring, and collaboration across cross-functional teams.
• Built and maintained cloud infrastructure and automated delivery pipelines using AWS, Jenkins, Terraform, Ansible, and AWS CloudFormation, enabling reliable CI/CD and infrastructure-as-code practices.