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I help e-commerce and digital brands improve marketing ROI, increase conversions, reduce churn, and scale profitably using Marketing Analytics, Machine Learning, Artificial Intelligence, predictive modeling, and causal inference. With 10+ years of experience in data science and analytics, I build data-driven systems that help businesses optimize ad spend, forecast demand, improve customer retention, and make better growth decisions using measurable data insights. I specialize in Marketing Mix Modeling (MMM), attribution analysis, forecasting, customer analytics, and growth-focused machine learning systems. Proven Impact * Reduced cart abandonment by 25% using predictive modeling and cohort analysis * Improved marketing efficiency and ROAS through Bayesian Marketing Mix Modeling (MMM) * Built AI-driven pricing systems that improved revenue performance and pricing strategy * Increased customer retention and lifetime value using segmentation and personalization models * Developed attribution and analytics systems for data-driven marketing optimization * Built forecasting systems for demand planning and operational decision-making What I Help Businesses Achieve Marketing Analytics & Growth Optimization * Marketing Mix Modeling (MMM) * Budget optimization and media allocation * Funnel analysis and conversion optimization * Customer journey and behavioral analytics * Multi-touch attribution and incrementality analysis * Customer Lifetime Value (LTV) and cohort analysis * Meta Ads and Google Ads performance diagnostics * A/B testing and experimentation * Real-time analytics dashboards and reporting systems Predictive Modeling & Data Science * Demand forecasting and inventory optimization * Churn prediction using survival analysis * Customer segmentation and personalization * Recommendation systems * Pricing optimization models * Fraud and anomaly detection * Predictive analytics for growth and operations Causal Inference & Advanced Analytics * Difference-in-Differences (DiD) * Bayesian Structural Time Series (BSTS) * Synthetic Control methods * Geo-level MMM and lift-test integration * Incrementality and elasticity analysis * Scenario planning and forecasting Selected Projects 🔹 Marketing Mix Modeling (MMM) System Built Bayesian MMM models using PyMC and NumPyro to measure channel effectiveness, optimize budget allocation, and improve ROAS across paid media channels. 🔹 E-commerce Churn Prediction System Developed survival analysis and cohort models using Shopify and GA4 data to identify churn risk, improve retention, and reduce cart abandonment by 25%. 🔹 AI Dynamic Pricing Engine Built a machine learning pricing system using demand forecasting and competitor analysis to optimize pricing strategy and maximize revenue performance. 🔹 Attribution & Growth Analytics Platform Designed analytics systems for Meta Ads and Google Ads performance analysis, attribution modeling, and customer acquisition optimization. 🔹 AI Forecasting Platform Evaluation (FOUNT) Evaluated an enterprise AI-native forecasting and causal intelligence platform by benchmarking its forecasting performance against production-grade machine learning baselines. Built an XGBoost forecasting benchmark, engineered time-series features, and validated model performance using WAPE, MAPE, and R² across retail forecasting datasets. Conducted hyperparameter tuning, SDK validation, workflow testing, and technical documentation reviews while providing detailed product feedback that contributed to improvements in the platform's forecasting workflow, SDK documentation, and inference process. Typical Projects I Handle * Marketing Mix Modeling (MMM) * Attribution modeling * Forecasting and demand planning * E-commerce analytics * Growth analytics * Customer segmentation * Churn prediction * Pricing optimization * Meta Ads & Google Ads analytics * Conversion and funnel optimization * Analytics dashboards and reporting systems Tech Stack Python, SQL, R, PyMC, NumPyro, Scikit-Learn, TensorFlow, Spark, BigQuery, Snowflake, Power BI, Tableau, Looker Studio, GA4, Meta Ads, Google Ads, Shopify, Klaviyo, XGBoost, Causal AI, SDK Validation, Feature Engineering, Time Series Forecasting Why Clients Work with Me * Strong blend of data science, marketing analytics, and business strategy * Experience building scalable analytics and ML systems * Focus on measurable ROI, profitability, and growth impact * Ability to translate complex data into actionable business decisions * Deep expertise in MMM, attribution, and causal inference Let’s Work Together If you're looking to improve marketing ROI, optimize ad spend, forecast demand, reduce churn, or build advanced analytics systems that drive measurable business growth, I’d be happy to help.

I am a Biomedical Engineer, ISO 13485 Auditor, Medical Devices innovation Specialist, Innovation mentor and MedTech/Neurotech R&D Engineer with a strong passion for advancing healthcare technology from concept to commercialization. I have practical field service engineer experience in installation, service, calibration & sales of ICU, Imaging, Theatre, Gas Plants, X-ray, IVD, Dental systems, and broader hospital infrastructure. I am also trained in Medical Equipment Procurement, Planning, and Financing by IFC (World Bank Group). I have completed several manufacturer training by Germany and China manufacture's. Additionally, I completed the Neurotech Entrepreneurship & Innovation Program, gaining structured training across Process, Preclinical, Clinical, and Commercialization pathways. I have also worked remotely with a stealth neurotech startup as a PNS Design Lead & R&D Engineer, contributing to early-stage device design reviews and innovation roadmap development. MEDTECH INNOVATION & R&D SERVICES • Medical Device Concept Research & Feasibility Analysis • Design & Development Review (ISO 13485 Design Controls) • Neurotechnology Innovation Strategy • Medtech/ Neurotech R&D in Medical Devices • Innovation Roadmap Development • Product Development Strategy MARKET & COMMERCIALIZATION STRATEGY • MedTech Market Research & Market Intelligence • Competitor Intelligence Analysis (MedTech / NeuroTech) • Market Entry Strategy Roadmap Development • Regulatory pathway roadmap strategy • Procurement Planning & Tender Specification Development FIELD SERVICE & TECHNICAL BIOMEDICAL ENGINEERING SERVICES • Installation & Commissioning of Medical Equipment (All product lines) • Preventive Maintenance (PPM) & Troubleshooting • Biomedical Calibration & Performance Verification •Technical Support (Remote & Onsite) • Continuous Medical Equipment Training (CME) • Hospital Equipment Lifecycle Management HEALTHCARE / HOSPITAL ENGINEERING CONSULTANCY SERVICES • Development of complete medical equipment lists based on architectural and clinical designs • Room-by-room equipment planning full list (ICU, OT, Imaging, OPD, CSSD, Labs, Dental, Wards) • Preparation of neutral medical equipment technical specifications for RFQ / RFI / RFP • Medical Gas Pipeline Systems (MGPS) full design based on architectural drawings • Medical equipment procurement support • Preparation of Neutral Tender Documents, RFQ, RFI • Architectural design review from a biomedical engineering perspective • Fire piping design, protection and safety engineering review for the hospital • Medical equipment acceptance testing and commissioning planning • Preventive maintenance strategy development and continuous training planning • Technical design of full list of all employees based on achitectural designs of the hospital with JDs and qualifications required for hiring I combine technical precision, regulatory intelligence, and commercialization insight to deliver high-impact solutions in the medical device industry. If you are building, launching, optimizing, or expanding a medical device product I am ready to support your success. NB: SERIOUS CLIENTS ONLY. I DO NOT OFFER MY SERVICES FOR FREE

I am a results-driven Healthcare Researcher, Registered Nurse, and AI/IT Specialist with experience in academic writing, healthcare research, data analysis, and digital solutions. I specialize in producing high-quality healthcare and psychology-related content supported by evidence-based research, APA, MLA, Harvard, Chicago, Vancouver and IEEE formatting, and recent scholarly sources. My background combines healthcare expertise with technology and artificial intelligence to deliver accurate, practical, and impactful solutions for clients across different industries. My expertise includes healthcare and nursing research, academic and professional writing, SPSS statistical analysis, literature reviews, systematic reviews, psychology and behavioral research, human factors in healthcare technology, and AI-assisted healthcare solutions. I am highly detail-oriented, professional, and committed to delivering clear, organized, and research-driven work that meets deadlines and exceeds client expectations.

Hello! Its the first semi of 2026. What venture are you into? I take pride in partnering with clients across diverse markets to build resilient businesses, drive sustainable growth, and address the complex, evolving challenges inherent in dynamic operating environments. Over the past seven years, I have supported the successful raising of more than $400 million in equity financing and $20 million in lines of credit, while also advising numerous founders on structured bootstrapping strategies to build traction, strengthen fundamentals, and position their ventures for institutional investment. Here is what I focus on when working with you: 1. The industry • competition • market opportunity size • market trend • nature of market • regulation • bargaining power • ease of entry and exit • Government policies • macroeconomic shocks • technological, environmental, social, and geopolitical environment. 2. Marketing and Revenue generation • Marketing channels and their level of relevance. • Revenue generation medium, and its suitability to consumers. • Pricing strategy. • Distribution channels, patterns, and efficiency. • Volume of sales over time. 3. The product and process. • Product - market needs compatibility. • Product quality control. • Product supply capacity. • Packaging and branding - Service offering experience. - Service packaging. - after-sales service. • Supplier options. • Working capital mismanagement. 4. Cost structure. • COGs. • Overheads. • Taxes. • Constraints. • Margins and pricing. 5. Strategy and positioning. • competitive advantage. • definite value proposition. • open tabs on competitors' strategies. 5. Organization and governance •Team proficiency, roles, and necessity. 6. Capital raise • debt • equity • both sources • bootstrapping for no capital raise • capitalization table • pitchdeck • business plan • financial model My services are priced between $600 and $2,500, depending on the project deliverables, size, and complexity. The timeline typically runs between 1 and 4 weeks for a normal investment document preparation.

Most businesses find out they have a security problem the hard way. I try to make sure that doesn't happen. I'm David — a cybersecurity consultant and trainer based in Nairobi, Kenya. I hold 13 verified certifications from Cisco Networking Academy and SOS Regional Resources Centre, covering network defense, endpoint security, cyber threat management, industrial networking, and IoT. But more than the certs, what I actually do is hunt for vulnerabilities before attackers find them, write reports that non-technical people can understand and act on, and train teams who think cybersecurity is someone else's problem. I'm an active researcher on HackerOne. I use real tools — BBOT, Nuclei, Burp Suite — on real targets. When I finish an assessment, you get a professional report with CVSS scores, CWE references, business impact explanations, and a remediation roadmap. Not a raw tool output. Not a template with your company name pasted in. An actual report. On the training side, I'm a peer lecturer at Thika Technical Training Institute. I've explained phishing, social engineering, and endpoint hardening to students who walked in thinking a firewall was a piece of furniture. If I can make security click for them, I can make it click for your team. I also built VidacyberBot — a multilingual WhatsApp AI assistant with threat detection built in — which tells you that I don't just talk about security tools, I build them. I'm also a published author. My book, Tech Evolution: Humanity in the Digital Age, is on Amazon Kindle. So yes, I can write — which matters when your deliverable is a security policy, an incident response plan, or a training module that your staff will actually read. Here is who I work well with: Small businesses that know they need to get serious about security but cannot afford a full-time security team. Organizations that need security documentation written by someone who actually understands what the document is describing. Startups that want a real vulnerability assessment without the enterprise price tag. I'm not going to copy-paste a Nessus scan into a PDF and call it a report. I take time to understand your actual environment, your real risks, and what your team can realistically fix. Then I tell you the truth about where you stand. Message me before you hire if you want to talk through what you need. I read every message myself.

Greetings! I am an accounting professional with over 10+ years of professional bookkeeping, accounting and finance experience. I bring comprehensive expertise in financial analysis, budgeting, taxation, and strategic planning to the table. Experience and Expertise: With over a decade of experience in accounting and finance, I excel in financial analysis, budgeting, taxation, and strategic planning. My track record speaks to my ability to deliver results. Accuracy and Timeliness: I am highly analytical and detail-oriented, consistently delivering accurate and timely financial reports. This empowers organizations to make informed decisions and achieve their financial goals. I am proficient in : - Sage -Xero - Tally - Quickbooks - MS Excel, Word, and PowerPoint - Accounting/Book-keeping - Account reconciliation - Account Receivable/Payable - Payroll, Tax return Compliance and Tax Optimization: Throughout my career, I have successfully guided businesses through complex financial challenges, ensuring compliance with local regulations and optimizing tax strategies to maximize savings. Financial Literacy Advocacy: Beyond balance sheets, I am passionate about fostering financial literacy within organizations, enabling teams to make informed financial decisions. Adaptability and Collaboration: As an adaptable problem-solver, I thrive in fast-paced environments, collaborating seamlessly with cross-functional teams to achieve financial excellence. Let's connect to explore how my expertise can contribute to the success and growth of your organization. Whether you are a startup or an established firm, my goal is to be your trusted financial partner.