The Track Record
Built in the Deep End. Proven Across the Board.
Every engagement, every system, every result — rooted in years of real-world experience across data science, full-stack engineering, and strategic consulting. Not theory. Not slide decks. Track record.
Career Timeline
BSc Software Engineering · AAiT
Backend Engineer · ICare Ethio Medical
Data & ML Fellow · 10 Academy
Mr. Fish Consulting — Launched
Generative AI · Global Clients
The Story
Fisseha Estifanos — known professionally as Mr. Fish — is a data scientist, AI engineer, and full-stack consultant based in Addis Ababa, Ethiopia, operating globally.
The journey started at Addis Ababa Institute of Technology (AAiT), where a BSc in Software Engineering built the formal foundation: algorithms, database systems, software architecture — the engineering rigour that underpins everything that followed. During the degree, an internship at ICare Ethio Medical turned into a two-year backend and database role — real production systems, real clinical data, real stakes.
After graduating, a competitive fellowship at 10 Academy accelerated the transition into data engineering and machine learning — five production-grade projects in four months, spanning logistics optimisation, pharmaceutical forecasting, telecom analytics, and automated data pipelines. That intensive programme was the bridge between software engineering and applied data science.
In 2022, Mr. Fish consulting launched — building AI-powered systems, data infrastructure, and full-stack backends for clients across Africa and beyond. The current focus: Generative AI and RAG architectures — building production-grade intelligent systems that solve real business problems, not demos.
Based In
Addis Ababa, Ethiopia
Works With
Global Clients · Remote-First
Primary Specialty
Generative AI & RAG Pipelines
Background
Software Engineering + Data Science
Experience
2019 – Present
Career Timeline
Where I've Been. What I've Built.
Founder & Principal Consultant
Mr. Fish — Independent Consulting · Addis Ababa, Ethiopia · Remote-Global
- · Built and deployed RAG (Retrieval-Augmented Generation) pipelines and vector database architectures for AI-driven applications
- · Designed and delivered end-to-end data engineering systems and full-stack backends for clients across Africa and beyond
- · Specialising in Generative AI integration, production-grade data infrastructure, and strategic technical advisory for scaling organisations
Data Engineering Fellow
10 Academy · Addis Ababa, Ethiopia
- · Completed an intensive 4-month data engineering programme, delivering five production-grade projects on real-world datasets
- · Engineered end-to-end ELT pipelines using Apache Airflow, dbt, PostgreSQL, and Redash — from raw ingestion to analyst-ready dashboards
- · Built ML and deep learning models for pharmaceutical sales forecasting (Rossman) and telecom customer analytics, with full MLOps tooling: DVC, GitHub Actions, and Streamlit dashboards
- · Delivered logistics optimisation system for Gokada (Nigeria's largest last-mile delivery service) using causal inference and geospatial analysis
Software Developer — Backend & Database
ICare Ethio Medical · Addis Ababa, Ethiopia
- · Developed and maintained production backend systems for a healthcare software platform serving medical institutions across Ethiopia
- · Designed and optimised relational database schemas and SQL procedures for clinical data management
- · Collaborated across the full development lifecycle — from requirements gathering with non-technical medical staff to deployment
Software Engineering Intern — Frontend
ICare Ethio Medical · Addis Ababa, Ethiopia
- · First professional engineering role, taken on during the second year of BSc studies
- · Built and iterated on front-end interfaces for internal clinical tools, gaining hands-on exposure to enterprise software development
Education & Credentials
The Foundation Behind the Expertise.
BSc. Software Engineering
Addis Ababa Institute of Technology (AAiT)
2018 – 2022
Formal foundation in software architecture, database systems, and advanced programming — the academic bedrock behind the practical engineering.
Data Engineering Intensive Fellowship
10 Academy
2022
Intensive, project-based programme covering end-to-end data engineering: pipelines, warehousing, MLOps, and production deployment on real-world datasets.
Skills & Tech Stack
The Toolkit.
Generative AI & LLMs
Data Science & Machine Learning
Data Engineering & Infrastructure
Full-Stack Engineering
Cloud & DevOps
Analytics & Visualisation
Consulting & Strategy
Selected Work
Problems Solved. Systems Built. Results Delivered.
A curated selection of past engagements — chosen to illustrate the breadth of industries, the depth of technical challenge, and the measurable impact of each solution.
The Challenge
A client needed an intelligent document retrieval system capable of answering domain-specific questions accurately — without hallucination — over a large proprietary knowledge base.
The Solution
Designed and built a production RAG pipeline with vector store indexing, semantic chunking, and retrieval-augmented generation. Implemented a modular architecture allowing the client to swap embedding models and LLM providers without rebuilding the system.
The Result
Delivered a fully operational AI assistant with measurable retrieval accuracy — replacing hours of manual document search with sub-second contextual answers.
The Challenge
Gokada — Nigeria's largest last-mile delivery service — faced a critical operational problem: drivers were positioned suboptimally across Lagos, resulting in high rates of unfulfilled delivery requests and lost revenue for both the company and its driver partners.
The Solution
Applied causal inference methods to identify the root causes of unfulfilled requests, then built a logistic optimisation model recommending strategic driver placement across city zones — using historical trip data, driver behaviour patterns, and geospatial analysis.
The Result
Produced a data-driven placement strategy with quantified improvement projections for fulfilment rates, directly tied to driver income and platform revenue.
The Challenge
A telecommunications company had extensive customer and network usage data but no systematic way to extract business insight — leaving strategic decisions based on intuition rather than evidence.
The Solution
Built a full analytics pipeline from raw data ingestion through to an interactive Streamlit dashboard — covering customer segmentation, usage pattern analysis, and operational KPIs — giving the analytics team a single, live source of truth.
The Result
Delivered an operational analytics dashboard enabling the business team to self-serve data questions, reducing analysis turnaround from days to minutes.
The Challenge
Rossmann Pharmaceutical needed to forecast sales six weeks in advance across hundreds of store locations — accounting for promotions, competitor proximity, school holidays, and seasonal patterns — to optimise inventory and staffing.
The Solution
Built an end-to-end ML and deep learning forecasting system using Scikit-learn, TensorFlow, and feature engineering pipelines. Trained models on multi-year historical data with full MLOps: reproducible pipelines via DVC and automated retraining workflows.
The Result
Produced a six-week sales forecast with strong predictive accuracy across store types, enabling confident inventory planning and reducing over/under-stocking.
The Challenge
An organisation needed a scalable, automated data pipeline to extract data from multiple heterogeneous sources, load it into a centralised data warehouse, and transform it into clean, analyst-ready tables — with data quality validation at every step.
The Solution
Architected an end-to-end ELT pipeline using Apache Airflow for orchestration, dbt for in-warehouse transformation, Great Expectations for automated data quality checks, and Redash for business intelligence dashboards on top of PostgreSQL.
The Result
Delivered a fully automated, observable data pipeline — reducing manual reporting effort and giving analysts reliable, validated data on a scheduled refresh cycle.
You've Seen the Track Record. Now Let's Add Your Project to It.
Every entry on this page represents a real problem solved, a real system built, and a real business transformed. The next one could be yours.