DICKENS ALPHONCE JUMA

STACK TypeScript, Python, LangChain, Pinecone, AWS, Docker

• Led architecture and implementation of production LLM + RAG services supporting leasing and tenant operations across live US real estate environments.
• Designed reusable AI backend services reducing inference latency by 30% and improving issue resolution times by 50%.
• Improved workflow accuracy by 40% and reduced hallucinations by 30% through retrieval pipeline optimization.

STACK Node.js, TypeScript, Kafka, MongoDB, Kubernetes, Terraform

• Led migration to Kafka-based event-driven services, improving deployment independence and sprint predictability to over 90% acceptance rate.
• Designed modular payroll and ERP services automating 80% of payroll workflows; reduced infra costs by 25%.
• Deployed cloud-native services with Kubernetes and Terraform achieving 99.9% uptime.
• Mentored junior engineers, established code review standards and engineering best practices.

STACK Java, Spring Boot, GraphQL, PostgreSQL, AWS Lambda, Redis

• Built backend services powering cross-border insurance products across Ghana, Kenya, Uganda, and Nigeria.
• Improved average API latency by 20% through Redis caching and backend optimization.
• Implemented OAuth2 and SAML authentication aligned with PCI and GDPR requirements.

STACK Node.js, Java, Kafka, GraphQL, AWS Lambda, PostgreSQL

• Architected high-availability payment and wallet infrastructure processing 10,000+ monthly transactions.
• Reduced transaction processing time by 30% via async event-driven workflows and idempotent handlers.
• Deployed AWS Lambda notification and settlement pipelines; improved reliability under traffic spikes.
• Automated CI/CD with GitHub Actions, Docker, and Terraform - cut deployment time by 60%.

STACK Node.js, TypeScript, Kafka, PostgreSQL, AWS Lambda, AWS Cognito

• Built onboarding and policy management APIs cutting manual processing from 3 days to 8 hours (-70% ops workload).
• Built Kafka-based claims processing pipeline; throughput up 35% with automated error retries.
• Integrated M-Pesa, Flutterwave, and Stripe; raised payment success rates by 25%.

STACK Node.js, Angular, PostgreSQL

• Led development of a microinsurance USSD platform serving 50,000+ users across Kenya, Uganda, and Malawi.
• Partnered with One Acre Fund to launch farmer insurance products in Malawi with real-time reporting.
• Mentored backend engineers; reduced onboarding time by 40%.

• Built a multi-tenant SaaS platform serving 150+ SMEs with CRM, bookings, inventory, payments, and WhatsApp automation.
• Architected event-driven backend services integrating payments, messaging, and AI workflows with Docker-based deployments.