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I am a Senior Data Engineering Solutions Architect focused on designing scalable data platforms across AWS, GCP, Azure, and Oracle ecosystems. I specialize in cloud lakehouse architectures, distributed compute (Spark/EMR/Databricks), orchestration (Airflow, Dagster), streaming (Kafka/Debezium), and CI/CD automation. I drive reliable, governed data systems with data quality frameworks, cost optimization, and cross-cloud migrations (100TB+). I lead cross-functional teams, mentor engineers, and partner with C-level stakeholders to deliver end-to-end data solutions.…I am a Senior Data Engineering Solutions Architect focused on designing scalable data platforms across AWS, GCP, Azure, and Oracle ecosystems. I specialize in cloud lakehouse architectures, distributed compute (Spark/EMR/Databricks), orchestration (Airflow, Dagster), streaming (Kafka/Debezium), and CI/CD automation. I drive reliable, governed data systems with data quality frameworks, cost optimization, and cross-cloud migrations (100TB+). I lead cross-functional teams, mentor engineers, and partner with C-level stakeholders to deliver end-to-end data solutions.

Otieno Onyango

Architect, Cloud Developer, Full Stack Developer, +5

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I am a Senior Data Engineering Solutions Architect focused on designing scalable data platforms across AWS, GCP, Azure, and Oracle ecosystems. I specialize in cloud lakehouse architectures, distributed compute (Spark/EMR/Databricks), orchestration (Airflow, Dagster), streaming (Kafka/Debezium), and CI/CD automation. I drive reliable, governed data systems with data quality frameworks, cost optimization, and cross-cloud migrations (100TB+). I lead cross-functional teams, mentor engineers, and partner with C-level stakeholders to deliver end-to-end data solutions.…I am a Senior Data Engineering Solutions Architect focused on designing scalable data platforms across AWS, GCP, Azure, and Oracle ecosystems. I specialize in cloud lakehouse architectures, distributed compute (Spark/EMR/Databricks), orchestration (Airflow, Dagster), streaming (Kafka/Debezium), and CI/CD automation. I drive reliable, governed data systems with data quality frameworks, cost optimization, and cross-cloud migrations (100TB+). I lead cross-functional teams, mentor engineers, and partner with C-level stakeholders to deliver end-to-end data solutions.

Available to hire

I am a Senior Data Engineering Solutions Architect focused on designing scalable data platforms across AWS, GCP, Azure, and Oracle ecosystems. I specialize in cloud lakehouse architectures, distributed compute (Spark/EMR/Databricks), orchestration (Airflow, Dagster), streaming (Kafka/Debezium), and CI/CD automation.

I drive reliable, governed data systems with data quality frameworks, cost optimization, and cross-cloud migrations (100TB+). I lead cross-functional teams, mentor engineers, and partner with C-level stakeholders to deliver end-to-end data solutions.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Senior Data Engineering Solutions Architect at Deimos Cloud (Client: Jumia Group)

May 1, 2024 - Present

Led architecture and delivery of scalable data platforms across Jumia's central data ecosystem, focusing on governance, reliability, optimization, and multi-country enablement. Guided cross-functional teams to translate requirements into scalable platform capabilities while balancing timelines, governance, and cost. Drove Data Quality & Governance using Great Expectations + Spark + S3; modernized Airflow; implemented a metadata-driven Iceberg optimization engine; automated cross-cloud backups/migrations (100TB+ BigQuery to GCS Coldline); and enhanced DevOps with GitHub Actions, Docker, Kubernetes, and SSL automation.

Senior Data Engineer — Distributed at Distributed (Consulting)

October 1, 2023 - May 31, 2024

Designed and deployed scalable batch and streaming data pipelines using Kafka, Spark, Flink, and Databricks for near real-time analytics; built cloud data lakes on S3 with optimized file layouts; improved query performance by 3–5x and reduced storage through layout and compression optimization. Developed robust ETL pipelines feeding Redshift and BigQuery with integrity checks and automated testing; mentored junior engineers and promoted Terraform-based IaC.

Senior Data Engineer — Data Platform & Reporting — Jumo.world at Jumo.world

September 1, 2021 - October 31, 2023

Led end-to-end KYC data pipelines supporting regulated reporting across multiple markets; built event-driven ingestion for reconciliation using Kafka + Debezium + Spark for real-time reporting and strengthened financial controls. Modernized ingestion frameworks by transitioning legacy ETL to incremental CDC with Airflow, Spark, and SQL integrated with CI/CD; instituted QA protocols to detect anomalies early.

Senior Analytics Engineer — Koko Networks Limited at Koko Networks Limited

January 1, 2021 - September 30, 2021

Led migration and development of AWS-based cloud data warehouse; maintained Tableau server and analytics delivery. Designed fact and dimension models to improve data interpretability; reduced report generation time and enabled self-service analytics for 20+ users. Developed automated dbt + Airflow workflows and built dashboards in Tableau and DOMO.

Data Warehouse & Lead Advanced Analytics Engineer — Kenya Revenue Authority (KRA) at Kenya Revenue Authority (KRA)

October 1, 2017 - January 31, 2021

Developed, debugged, and optimized ETL workflows processing 10M+ daily tax and compliance transactions using Informatica Power Center, ODI, Python, and PL/SQL; implemented data mining, modeling, and ML-based risk profiling; delivered BI dashboards in Tableau and OBIEE; managed Oracle and PostgreSQL environments.

Software Engineer — STANGA ONE 1 at STANGA ONE 1 (Sofia, Bulgaria)

May 1, 2017 - August 31, 2017

Designed and developed USSD applications integrated via REST APIs; designed and managed MySQL schemas and performance tuning for production workloads; delivered features using SCRUM practices.