Joe Macibi

Backend engineer and AI systems builder.

Talent

Nairobi, Nairobi Area26 KES/hourMember since February 10, 2024

PythonLangChainOpenAI APIRAG architectureEmbeddingsSemantic searchPydanticRetry logicDeterministic fallbacksJavaFastAPIPostgreSQLMySQLAsync processingCodexClaude CodeDevinCursorDockerKubernetesAWSEKSS3RDSTerraformPrometheusGrafanaExecution history recordingCompliance documentationKafka

Hire their services

Request a quote with no obligation

Product Manager Java Developer Springboot Ai Engineer Microservices React Team Leader Api Development Natural Language Processing Machine Learning Engineer

About

Backend engineer and AI systems builder with 5 years of production experience designing, shipping, and operating LLM-integrated backend services, RAG pipelines, structured output validation systems, and data orchestration workflows.

Built

InfraRecord, a production RAG platform using Python, LangChain, and the OpenAI API with structured output generation, validation pipelines, audit logging, and fallback handling.

Senior Software

Engineer and Team Lead (remote, 5 engineers) at GipperPay Finance, where I led AI-assisted development workflows using Codex, Claude Code, and Devin daily, enforcing code review discipline, test coverage, and validation on all AI-generated outputs. Operates confidently across Python, FastAPI-style REST API design, PostgreSQL, async processing, Docker, Kubernetes, and AWS. Holds an AI Security and Governance certification (Securiti AI), GRC credential (Strathmore University, Distinction), and CISA, providing a compliance and traceability grounding relevant to PixeSci's audit and reproducibility mission.

BSc Information Technology, JKUAT (GPA 3.4/4.0, December 2025, Departmental Merit Prize).

Experience

Senior Software Engineer and Team Lead at GipperPay Finance (2023-05 – Present)

Led a remote team of 5 engineers building and maintaining Python and Java backend services for payments, lending, and payroll systems; conducted structured code reviews, enforced test coverage standards, and guided architecture decisions across all AI-assisted and standard features.
Built LLM-integrated backend services using LangChain, the OpenAI API, and Claude API for AI-assisted financial workflow generation, structured output validation, and decision logging, with explicit validation contracts between AI-generated suggestions and executable business logic.
Designed and implemented prompt pipelines with structured output schemas, validation layers, retry logic, and deterministic fallbacks, ensuring AI behavior remained reliable, traceable, and testable in production financial workflows.
Directed compliance and governance architecture for GipperPay's Kenyan market entry: mapped all platform data flows, API integrations, and AI decision paths to CBK regulatory requirements, COBIT and NIST frameworks, implementing audit logging and execution history recording that made every AI-assisted decision reproducible and traceable.
Operated AI-native development workflows daily using Codex, Claude Code, Devin, and Cursor, treating all AI-generated code with strict review discipline: explicit failure mode specifications written before generation, adversarial edge case testing, and no AI output merged without validation and test coverage.
Built Kafka event pipelines processing 30,000+ monthly signals, Prometheus and Grafana monitoring for real-time observability, and Terraform IaC on AWS (EKS, S3, RDS), reducing latency by 80% and costs by 25% through systematic optimisation.

AI and Robotics Tutor at Deutsche Schule Nairobi (2024-09 – Present)

Part-Time, Concurrent

Designs and delivers structured AI curricula for students under 14, including sessions on how LLMs behave, where they fail, and why AI outputs require validation before acting on them — directly reflecting the production AI discipline PixeSci requires.

Software Engineer at Pesapal Limited (2022-06 – 2023-03)

Built and maintained multi-vendor mobile money API integrations (M-Pesa, Airtel Money, MTN MoMo) with structured payload validation, security controls, and async transaction processing workflows across merchant payment platforms in East and Central Africa.
Monitored PostgreSQL and MySQL transaction data streams for anomalies; produced structured operational reports and maintained compliance documentation.

Network Infrastructure Assistant at The Catholic University of Eastern Africa (2020-01 – 2020-04)

Internship

Configured automated event logging scripts using Linux coreutils for infrastructure monitoring; maintained structured operational records and IT governance documentation.