I’m a Machine Learning Engineer and Data Scientist based in London, with an MSc in Big Data Analytics and 4+ years of professional software engineering experience. I build end-to-end predictive systems in Python—starting from data cleaning and exploratory analysis, through feature engineering and imbalance handling, to model selection and evaluation—then deploy them as production-ready services. I recently worked on a multi-disease clinical risk prediction system that serves scikit-learn and XGBoost models via a FastAPI backend on AWS EC2, and I’ve also built stroke risk modelling work using NHS patient data. I enjoy bridging ML and real-world engineering: containerized APIs, reproducible pipelines, CI/CD discipline, and reliable releases—along with communicating technical ideas clearly to non-technical stakeholders.…

Olalekan Toheeb Waheed

I’m a Machine Learning Engineer and Data Scientist based in London, with an MSc in Big Data Analytics and 4+ years of professional software engineering experience. I build end-to-end predictive systems in Python—starting from data cleaning and exploratory analysis, through feature engineering and imbalance handling, to model selection and evaluation—then deploy them as production-ready services. I recently worked on a multi-disease clinical risk prediction system that serves scikit-learn and XGBoost models via a FastAPI backend on AWS EC2, and I’ve also built stroke risk modelling work using NHS patient data. I enjoy bridging ML and real-world engineering: containerized APIs, reproducible pipelines, CI/CD discipline, and reliable releases—along with communicating technical ideas clearly to non-technical stakeholders.…

Available to hire

I’m a Machine Learning Engineer and Data Scientist based in London, with an MSc in Big Data Analytics and 4+ years of professional software engineering experience. I build end-to-end predictive systems in Python—starting from data cleaning and exploratory analysis, through feature engineering and imbalance handling, to model selection and evaluation—then deploy them as production-ready services.

I recently worked on a multi-disease clinical risk prediction system that serves scikit-learn and XGBoost models via a FastAPI backend on AWS EC2, and I’ve also built stroke risk modelling work using NHS patient data. I enjoy bridging ML and real-world engineering: containerized APIs, reproducible pipelines, CI/CD discipline, and reliable releases—along with communicating technical ideas clearly to non-technical stakeholders.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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Language

English
Fluent

Work Experience

Senior Software Engineer (Freelance) at CiTTyNex (US Client)
January 1, 2026 - Present
Owned architecture and backend data modelling for a cross-platform local business discovery platform as a sole engineer. Designed and secured Firebase backend including authentication, Firestore modelling and security rules, storage, messaging, and analytics with separate development/production environments. Implemented production telemetry using Crashlytics and Analytics to diagnose reliability defects such as token race conditions and router rebuild loops. Managed release cycles and production support to ensure stability for real users.
Software Engineer (Freelance, Part-time) at Boulevard
January 1, 2024 - January 1, 2025
Built a cross-platform property marketplace connecting seekers with landlords and agents. Implemented multi-criteria search and filtering across location, price, and property attributes using structured listing data at scale.
Flutter Developer at Boulevard
January 1, 2024 - Present
Built a full-featured real estate platform for property discovery, listings, and landlord-tenant interaction — deployed to both App Store and Google Play. Designed and implemented AI-powered chatbot within the app to handle tenant enquiries, reducing manual support load. Integrated secure payment gateways and RESTful APIs with robust error handling and offline caching for low-connectivity users. Led UI/UX improvements achieving a smoother property search experience with advanced filtering.
Senior Flutter Developer at Vesti Technologies
June 1, 2023 - January 1, 2025
Delivered production mobile applications for a migration-focused fintech platform serving users across multiple countries. Built an AI-powered migration chatbot and integrated the model service into the client application. Developed a multi-currency wallet supporting cross-border financial transactions with strong data integrity requirements. Improved stability and performance through profiling, debugging, and optimization, working in an Agile team while owning release cycles on both the Apple App Store and Google Play.
Flutter Developer at Intrapair Technologies
February 1, 2023 - May 1, 2023
Integrated RESTful APIs and third-party packages, optimizing API communication for reliability within mobile applications.
Mobile Application Developer (Contract) at Lotus Bank
February 1, 2023 - August 1, 2023
Led UI/UX overhaul of customer-facing banking application, improving usability and customer retention. Integrated OAuth 2.0 authentication and secure RESTful APIs; optimised app performance and reduced load times. Delivered polished releases in a regulated banking environment, maintaining high app store ratings.
Flutter Developer (Contract) at Lotus Bank
September 1, 2022 - February 1, 2023
Developed and improved a banking mobile application within a regulated environment. Integrated OAuth authentication and REST APIs for secure access to banking services while working under security and compliance constraints. Investigated and resolved defects and performance issues impacting application stability.
Flutter Developer at Vesti Technologies
June 1, 2022 - January 1, 2025
Architected and built an AI-powered migration chatbot from greenfield, using AWS Lambda for serverless backend processing and S3 for secure document storage — serving thousands of users globally. Developed a multi-currency wallet supporting seamless cross-border transactions with real-time exchange rates. Owned end-to-end deployment pipeline to App Store and Google Play; maintained 99%+ crash-free sessions via performance optimisation. Collaborated cross-functionally with backend and product teams using Agile/Scrum methodology.
Flutter Developer at Intrapair Technologies
June 1, 2020 - August 1, 2023
Designed and developed UI/UX for mobile applications, integrating third-party libraries and RESTful APIs. Maintained technical documentation to improve team collaboration and reduce onboarding time.
Mobile Application Developer (Part-time, Remote) at IntraChurch
March 1, 2019 - January 1, 2020
Built a digital platform for church communities featuring live streaming, push notifications, and event reminders. Developed cross-platform mobile application using Flutter and Dart, integrating third-party APIs for media and notifications.
Technical Support Associate at Auxano Solutions Technology
January 1, 2019 - Present
Installed and maintained CCTV and access control/network infrastructure for business clients, providing first-line technical support and troubleshooting.

Education

MSc Big Data Analytics at Sheffield Hallam University
January 11, 2030 - January 1, 2025
BSc Computer Science at Federal University of Technology Akure (FUTA)
January 11, 2030 - January 1, 2021
MSc Big Data Analytics at Sheffield Hallam University
January 1, 2025 - January 1, 2026
BSc Computer Science at Federal University of Technology, Akure
January 1, 2021 - September 25, 2026

Qualifications

Python for Data Science and AI
January 11, 2030 - March 29, 2026
What is Data Science
January 11, 2030 - March 29, 2026
Introduction to Artificial Intelligence
January 11, 2030 - March 29, 2026
Python for Data Science and AI (Coursera)
January 11, 2030 - September 25, 2026
What is Data Science (IBM)
January 11, 2030 - September 25, 2026
Introduction to Artificial Intelligence (IBM)
January 11, 2030 - September 25, 2026
Skill Acquisition and Entrepreneurship Development (NYSC)
January 11, 2030 - September 25, 2026

Industry Experience

Software & Internet, Financial Services, Real Estate & Construction, Healthcare, Education