Open to opportunities

ghollah kioko

@ghollahkioko

Message

I am a Senior Data Engineer building scalable, cost-efficient data platforms and analytics.

Kenya

Message

What I'm looking for

I seek a product-focused data engineering role where I can build scalable, cost-efficient data platforms, mentor teams, work cross-functionally with product and engineering, and deliver measurable business impact while growing into technical leadership.

I am a product-minded Senior Data Engineer with over six years of experience designing, building, and optimizing end-to-end data solutions that drive measurable business value.

I design scalable ETL/ELT pipelines and data platforms using Python, Celery, Apache Airflow alternatives, and AWS, and I led migrations and optimizations that reduced BI costs by 40%, infrastructure costs by 10–15%, and improved data accuracy by 30%.

I collaborate closely with product and executive teams to translate metrics into fundraising and product decisions, and I mentor junior engineers on data infrastructure best practices, code reviews, and effective visualization techniques.

I'm actively building AI analytics tools for SMEs and a lightweight in-house orchestrator to lower costs and improve agility; I thrive on solving complex data problems and delivering actionable insights.

Experience

Work history, roles, and key accomplishments

Current

Senior Data Engineer

Current

Lori Systems Ltd

Jan 2025 - Present (1 year 5 months)

Lead architecture and development of analytics features for external-facing applications, delivering performance insights to stakeholders and collaborating with product and engineering teams to ensure scalable, reliable data solutions.

Data Architecture Analytics JavaScript Python Data Visualization Stakeholder Management

Mid-level Data Engineer

Lori Systems Ltd

Jan 2023 - Dec 2024 (1 year 11 months)

Engineered a lightweight pipeline orchestrator using Python, Celery Beat, and Flask, reducing Airflow-related infrastructure costs by 15% and delivered critical data for company fundraising and finance needs.

Python Celery Flask ETL Apache Airflow AWS Cost Optimization Data Pipelines

Junior Data Engineer

Lori Systems Ltd

Jan 2021 - Dec 2022 (1 year 11 months)

Built and maintained Airflow data pipelines and managed the Amazon Redshift warehouse; led migration from Sisense to Metabase, cutting BI costs by 40% and contributed to a 10% infrastructure cost reduction via query optimization.

Apache Airflow Amazon Redshift SQL ETL Metabase Query Optimization Data Modeling Python

Junior Data Scientist

Lori Systems Ltd

May 2019 - Dec 2020 (1 year 7 months)

Developed a Python ML script to extract and structure truck registration data from unstructured WhatsApp messages, improving data accuracy by 30% and built Sisense dashboards to drive operational decision-making.

Python Machine Learning Data Extraction NLP Sisense Dashboards Data Cleaning