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ALAMIN Juma

@alaminjuma

Cloud and Systems Engineer at Griffin Global Technologies, LLC who architected an AI payment platform that lifted conversion by ~50%.

Kenya

Message

At Griffin Global Technologies, LLC, I architected a production speech-to-speech AI payment platform that increased automated payment conversion by ~50%. I built its Python FastAPI services and integrated Amazon Bedrock and LiveKit, with human escalation for calls that needed support.

I reduced AI infrastructure spend by ~85% by replacing an imported model workload with deterministic local scoring, validated across 61 test suites and live call testing. I also re-engineered telephony around self-hosted LiveKit and VICIdial, cutting call hangup latency from minutes to under 2 seconds.

Earlier, at Afyabook, I designed an idempotent payment engine that prevented duplicate M-Pesa and card charges in production and automated reconciliation against the Safaricom Daraja API, reducing failed transactions by 60%. At Elewa LLC, I architected an event-driven payment platform and standardized cloud provisioning, reducing production incidents by 40%.

Experience

Work history, roles, and key accomplishments

Current

Senior Cloud and Systems Engineer

Current

Griffin Global Technologies, LLC

Nov 2023 - Present (3 years)

Own end-to-end production engineering across software, AWS and Azure infrastructure, deployment, observability, and incident response for distributed .NET and Python workloads including a real-time AI payment platform. Architected a production speech-to-speech AI payment platform using Amazon Bedrock Nova Sonic and LiveKit, increasing automated payment conversion by ~50%.

Software Engineer (AWS and AI Focused)

Nakala Analytics

Mar 2023 - Sep 2023 (6 months)

Engineered generative AI workloads on Amazon Bedrock, integrating foundation models into production backend services for automated analysis, summarization, and decision-support workflows. Built RAG-oriented pipelines grounding model responses in application and business data to improve contextual relevance.

Amazon Bedrock RAG AWS Lambda S3 API Gateway IAM Cloudwatch Generative AI NLP Prompt Engineering Inference Optimization

Software Engineer (Contract, Part-Time)

Afyabook

Nov 2022 - Aug 2023 (9 months)

Designed an idempotent distributed payment engine preventing duplicate M-Pesa and card transactions across offline synchronization, retries, and connectivity failures, achieving zero duplicate charges in six months of production. Built resilient transaction processing with AWS Lambda, SQS, DynamoDB, PostgreSQL, and service-worker sync.

AWS Lambda Amazon SQS DynamoDB PostgreSQL Payment Systems Idempotency Distributed Systems M Pesa Daraja API Service Workers

Software Engineer

Elewa LLC

Sep 2020 - Oct 2022 (2 years 1 month)

Architected an event-driven payment platform on Kubernetes and AWS, provisioning processors on demand to eliminate idle compute while scaling with transaction volume across Belgian, French, and German regulatory frameworks. Designed resumable payment workflows persisting execution state to Amazon S3.