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Mati Data

About

5+ years building with data and software (since 2021), including production data engineering at scale since 2024.

Senior Data Engineer at Kifiya Financial Technology in Addis Ababa, running lakehouse, CDC and warehouse platforms for digital lending since 2024. I take data work from architecture and governance to production pipelines and analytics. AI engineering is my second discipline.

I work where data engineering meets the people who depend on it: partner systems that only hand over dumps, analysts who need one table instead of sixteen joins, and models that must read the same features in training and in production. I like designs that fail loudly, contracts that live next to the code they protect, and writing down why a decision was made.

Outside work I research Amharic language technology: how small language models degrade when quantized for consumer hardware, and how to read Ethiopic script reliably from images and PDFs.

Portrait of Matiwos Desalegn

Skills, by how they are evidenced

In production means I run it at work today. In projects means I built with it in a public repository or prototype. Learning means exactly that.

Orchestration and pipelines

In production

  • Apache Airflow
  • dbt
  • Mage AI
  • Apache Spark (PySpark)
  • PyIceberg
  • ETL and ELT pipeline design

In projects

  • Airbyte

Lakehouse and storage

In production

  • Apache Iceberg
  • Medallion architecture
  • Amazon S3 and Parquet
  • Trino
  • Apache Polaris catalog
  • Athena and the Glue Data Catalog

Streaming and CDC

In production

  • Change data capture
  • Debezium
  • Apache Kafka
  • OLake
  • AWS DMS

In projects

  • Redpanda

Learning

  • Apache Flink

Warehousing and modelling

In production

  • Amazon Redshift
  • PostgreSQL
  • Aurora PostgreSQL
  • ClickHouse
  • Dimensional modelling
  • BigQuery
  • Apache Superset
  • Redis
  • MongoDB

In projects

  • MySQL

Learning

  • Snowflake

Cloud and platform

In production

  • AWS data platform (S3, EKS, EMR Serverless, Lambda, EventBridge, Secrets Manager, IAM and IRSA)
  • Kubernetes
  • Docker
  • GitLab CI/CD
  • Linux

In projects

  • GitHub Actions

Learning

  • Terraform

AI and ML engineering

In production

  • Feast feature store
  • FastAPI
  • LangChain
  • CrewAI
  • Retrieval-augmented generation
  • ChromaDB
  • Keycloak

In projects

  • LangGraph
  • Qdrant
  • Embeddings for Ethiopian languages
  • LoRA and QLoRA fine-tuning
  • Model quantization
  • Hugging Face Transformers
  • Ollama
  • OCR for Ethiopic script
  • scikit-learn and XGBoost
  • TensorFlow and PyTorch

Observability and governance

In production

  • Data contracts and quality gates
  • OpenLineage and Marquez
  • OpenMetadata
  • Apache Ranger
  • Prometheus and Grafana
  • Pipeline alerting and on-call hygiene

Languages

In production

  • Python
  • SQL
  • Bash

In projects

  • TypeScript and JavaScript
  • Kotlin and Java (Android)

Education

  • 10 Academy

    Kifiya AI Mastery Training Program (KAIM): data engineering and machine learning intensive

    Jun 2024 to Aug 2024. Completed with distinction.

  • Wolaita Sodo University

    BSc, Electrical and Computer Engineering

    Sep 2018 to Jul 2023. GPA 3.69/4.0. Led the Google Developer Student Clubs chapter in the final year.

Community and teaching

  • Google Developer Student Clubs Lead

    Wolaita Sodo University, Aug 2022 to Jul 2023

    Led the university chapter of Google Developer Student Clubs and ran hands-on workshops on machine learning, web and mobile development. Google recognized the year with a letter of commendation.

  • Google Crowdsource Influencer

    Google Crowdsource, Sep 2022 to present

    Contribute and validate training data for Google's AI products through Google Crowdsource, as part of its Influencer community.

  • Internal machine learning lectures

    Kifiya Financial Technology (internal), Apr 2026 to Apr 2026

    Gave internal lectures on gradient-boosted trees (XGBoost) to colleagues on the data teams.

  • Data-science to data-engineering handoff template

    Kifiya Financial Technology (internal), May 2026 to present

    Wrote the template data scientists use to hand feature-engineering work over to data engineering, so each feature arrives with its definition and source logic written down before it goes into the ML feature store. It has been revised several times since the first version.

Credentials

Data engineering

AI

Software

Community

  • Inclusive Open Source Community Orientation (LFC102) The Linux Foundation, Aug 2026

Recommendations

I've had the pleasure of working closely with Matiwos, a Data Engineer at Kifiya, and his growth has been exceptional. He learns new technologies with impressive speed, consistently applies them effectively, and brings sharp problem-solving skills to every task. His focus, professionalism, and ability to deliver high-quality results make him stand out. Matiwos is an outstanding data engineer with tremendous potential, and I highly recommend him.
Natnael Argaw Wondimu, Group CTO, Kifiya Financial Technology PLC. Group CTO at Kifiya while I was a Data Engineer there; we worked closely together. Nov 2025.
I've had the pleasure of working with Matiwos and want to commend him for his exceptional work on our team. He demonstrated outstanding technical proficiency in managing and optimizing data pipelines, ensuring data integrity, and implementing efficient solutions that significantly improved our data processing capabilities. Matiwos is quick to take action, consistently responding to challenges and tasks with enthusiasm and a solutions-oriented mindset. His ability to communicate effectively coupled with strong problem-solving skills, made him an invaluable asset. I am confident that he will bring the same dedication and expertise to any future role.
Maelaf E. Tegegn, Senior Data Engineer, Forecasa. Worked with me on the same data team. Nov 2025.

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