Joseph Maina

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Featured Projects

Creative Industry B to B Platform - Image 1
Fintech / Enterprise Platform

Creative Industry B to B Platform

Led the backend architecture for CANEX, a large-scale creative industry marketplace. Designed and implemented distributed microservices handling user ...

Key Highlights

  • Architected scalable microservices architecture
  • Implemented AI recommendation engine
  • Integrated payment processing systems
  • Redis-based caching for performance optimization
  • Kafka-driven asynchronous workflows
  • Production monitoring with Prometheus and Grafana

Technologies

JavaSpring BootMicroservicesPostgreSQLRedisKafkaDockerKubernetes+3

Impact

50K+ active users, AI-driven personalization, production-grade fintech infrastructure

African Trade Gateway Platform - Image 1
B2B / Fintech

African Trade Gateway Platform

Developed and maintained backend services for the IATF platform, enabling secure B2B interactions across multiple African markets. Implemented event-d...

Key Highlights

  • PCI DSS and GDPR compliance implementation
  • Event-driven architecture using Kafka
  • Redis-based caching for performance and scalability
  • Kubernetes-based production deployments
  • End-to-end monitoring using Grafana

Technologies

JavaSpring BootPostgreSQLKeycloakKafkaRedisDockerKubernetes+2

Impact

Securely enabled cross-border trade and investment across Africa

Professional Experience

Senior Data Engineer (Compute Lead)

Qhala

Mar 2023 - PresentNairobi, Kenya

Progressed from Junior to Senior Engineer, owning end-to-end backend systems, microservices architectures, and operational platforms across multi-country deployments serving millions of users.

Senior Backend Engineer โ€“ CANEX Platform

Architected and operated distributed microservices using Java and Spring Boot, leveraging Kafka, Redis, Kubernetes, and Grafana for production-scale reliability.

Senior Backend Engineer โ€“ IATF Platform

Built secure, compliant backend services using event-driven architecture with Kafka and Redis, deployed on Kubernetes with full observability.

Data Pipeline & Operations Lead

Designed and operated scalable event-driven data pipelines using Kafka and Airflow, ingesting multi-source operational data across 54 African countries to power analytics and leadership decision-making.

Data Quality & Governance

Built data validation and quality frameworks ensuring consistency across 36+ country deployments. Designed monitoring and alerting infrastructure (Grafana, Loki, CloudWatch) and managed RBAC and secure database access.

Full-Stack Product โ€“ Tibalink & Maternal Health

Developed real-time communication for Tibalink (500+ healthcare workers) and delivered a maternal health PWA with offline access for Nigeria and Sierra Leone.

Data Engineer

Bruegel

Feb 2025 โ€“ Aug 2025Belgium (Contract)

Designed and operated end-to-end data infrastructure for a European clean energy investment platform, enabling stakeholders to analyze investment trends, capital flows, and market impact at scale.

Data Infrastructure Lead

Built end-to-end ELT pipelines using Python and SQL, designed data models for analytical workloads, implemented data validation frameworks, and built self-service dashboards for non-technical stakeholders.

Data Modeler

Flagstar Bank

Jan 2023 โ€“ Jun 2023United States (Contract)

Led designing and structuring of data warehouse to consolidate data from multiple source systems into a unified data mart for reporting and business analysis.

Data Warehouse Architect

Designed data warehouse models using dimensional modeling (star schema, conformed dimensions), collaborated with business stakeholders, and embedded business logic into the data layer.

Assistant Researcher

Center of Biomass and Energy Studies

Aug 2023 โ€“ Jan 2024Kenya

Applied research across clean energy systems, AI, and IoT-enabled data collection.

AI & IoT Research

Developed solar irrigation systems with pay-as-you-go models, designed data acquisition platforms for renewable energy optimization, built predictive models for solar energy collection, and implemented real-time IoT data collection (MQTT + Flask backend).

Assistant Researcher

Siemens Research Center

Feb 2021 โ€“ Oct 2023Kenya

Led development of computer vision and 3D reconstruction pipelines for prosthetic design.

Computer Vision Researcher

Led development of a 3D reconstruction pipeline (Docker, C++, Python) that reduced hospital visits by 15%. Coauthored a published research paper on AI-driven prosthetic design; led a team of 8 researchers across 4 universities.

Education

In Progress

MSc in Electrical and Computer Engineering

Carnegie Mellon University Africa
Aug 2025 - May 2026
Focus: Advanced AI, Cloud Computing, Security, and Architecture

Advanced studies in AI systems, cloud-native architectures, distributed systems, and security engineering.

Completed

Bachelor of Science in Mechatronic Engineering

Dedan Kimathi University of Technology
May 2018 - Apr 2023
Second Class Honors, Upper Division

Specialized in industrial automation, IoT systems, embedded systems, and data-driven engineering solutions.

Certifications

Spring Boot 3 & Spring Hibernate

2024
Professional Certification

Advanced Java backend development with the Spring ecosystem

Mastering Microservices

2024
Professional Certification

Microservices architecture using Java, Spring Boot, Docker, Kubernetes, Helm, and security best practices

Building AI-based Recommendation Algorithms

2024
Professional Certification

Design and implementation of personalization engines at scale

Deep Learning Specialization

2021
NVIDIA Deep Learning Institute

Computer vision and deep learning on Jetson Nano, real-time object detection

โœ“NVIDIA Certified Instructor

Siemens Mechatronic System Associate

2021
Siemens

Industrial automation systems (Levels 1 & 2)

Publications

2026

Compute Index for Africa

Qhala

Published Compute Index for Africa, a framework used by 20+ governments to guide AI infrastructure investment decisions.

2025

Accessible Digital Reconstruction and Mechanical Prediction of 3D Printed Prosthetics

ASME Journal of Mechanical Design ยท Siemens Research Center

Developed a low-cost pipeline using digital reconstruction and mechanical modeling to improve accessibility and customization of 3D-printed prosthetics from smartphone data.

Technical Skills

Backend Languages & Frameworks

JavaSpring BootNode.jsPythonREST APIsWebhooks

Data Engineering

Apache AirflowELT/ETL PipelinesData WarehousingDimensional ModelingStar SchemadbtGreat ExpectationsData ValidationData Modeling

Distributed Systems & Messaging

KafkaEvent-Driven ArchitectureRedisCaching StrategiesEvent-driven Pipelines

Cloud, DevOps & Observability

DockerKubernetesCI/CDAWSAzurePrometheusGrafanaCloudWatchLokiTerraform

Databases

PostgreSQLMongoDBCouchDBSQL

AI & Machine Learning

Machine LearningDeep LearningComputer VisionRAGAI Recommendation SystemsPyTorch

Fintech & Payments

Safaricom M-Pesa APIsPayment IntegrationsTransaction ProcessingPCI DSS Compliance

IoT & Systems Integration

IoT Device CommunicationMQTTLocation TrackingRemote Device ControlTamper Detection

Engineering Practices & Leadership

System DesignTechnical DocumentationAgile MethodologiesTeam LeadershipMentoring

Get in Touch

I'm always open to discussing new opportunities, collaborations, or just having a chat about technology and innovation.

Location
๐Ÿ‡ฐ๐Ÿ‡ช Nairobi, Kenya๐Ÿ‡ท๐Ÿ‡ผ Kigali, Rwanda