David Asare
London
Summary
Dynamic Technical Architect with a proven track record at Mastercard, specializing in high-availability cloud solutions and deterministic AI frameworks. Expert in Java and Python, I excel in leading teams to deliver innovative, scalable architectures while ensuring system reliability. Committed to driving digital transformation and optimizing performance in complex environments.
Overview
7
7
years of professional experience
Work History
Technical Architect (CTO)
Leaduru
01.2024 - Current
- Product Engineering: Architected and launched a multi-tenant SaaS platform from zero to production, focused on high-integrity data processing and automated onboarding.
- Automated Logic: Engineered a high-throughput API orchestration layer using Python (FastAPI) and n8n, managing complex asynchronous business logic.
- Cloud Strategy: Implemented a zero-overhead, highly scalable serverless architecture on AWS, ensuring high availability while reducing infrastructure costs by 90%.
Senior Software Development Engineer
Mastercard
02.2022 - 12.2023
- Deterministic Precision: Implemented back-end automated processing of large datasets using C# and Java 11+, integrating with analytics libraries and downstream services.
- Architecture & Design: Contributed to the overall design and architecture of global pricing systems, ensuring absolute precision in high-concurrency environments.
- Front-End Insights: Developed ReactJS front-end insights and recommendation features based on strategic client requirements.
- Stakeholder Collaboration: Partnered with front-office users and partnership teams to define and agree upon business requirements.
Senior Software Engineer
AND Digital
11.2021 - 02.2022
- AI/ML Pipelines: Developed the software architecture for Machine Learning and AI systems serving business sales forecasts.
- Model Training & Deployment: Implemented deployment pipelines for machine learning models and contributed to model prediction processing and data model training.
- Agile Leadership: Led a high-velocity development team, managing objectives and deliverables through product backlog prioritization and task establishment.
- Cloud Microservices: Developed customer-serving AI and cloud microservice solutions in Java 11.
Lead Software Engineer
Vodafone
08.2018 - 11.2021
- High-Scale Leadership: Led the VF Basket Java development team, delivering mission-critical checkout features against key business propositions.
- Performance Optimization: Reduced micro-service costs and optimized cloud expenditure through auto-scaling, circuit breakers, and performance testing using Locust/Python.
- Platform Resilience: Enhanced system security and reliability by introducing Java Cucumber BDD technology and mentoring junior team members.
- Event-Driven Infrastructure: Designed and monitored resilient platforms using AWS, Terraform, and Datadog to support digital channel transactions.
Projects
Marchcroft Digital Consulting | Principal AI Architect
Jan 2023 – Present
- High-Ticket Consulting: Lead architectural audits and system refactoring for high-growth startups, including the delivery of a $1M+ deterministic AI Agent platform.
- Infrastructure Stabilization: Specialized in migrating 'vibe-coded' MVPs into hardened, production-ready AWS environments for international clients.
- Deterministic Logic Design: Developed proprietary 'guardrail' frameworks wrapping probabilistic LLMs in strict API schemas to ensure 100% reliability in financial and legal workflows.
Education Certifications
- BSc Computer Science, Queen Mary University, London
- AWS Certified Solutions Architect, Associate
- Java SE 11 Programmer I, Oracle
- Upwork Expert-Vetted, Top 1% Global Talent
Core Tech Stack
Java (Spring Boot), Python (FastAPI), C#, .NET, ReactJS, Node.js/Express, Deterministic Guardrails, ML Pipelines, LLM Infrastructure, Data Model Training, AWS Services (Certified Architect), Terraform, Kafka, Azure DevOps, Bitbucket, Datadog, AppDynamics, PagerDuty, JIRA, Locust, Cucumber, Selenium
Timeline
Technical Architect (CTO)
Leaduru
01.2024 - Current
Senior Software Development Engineer
Mastercard
02.2022 - 12.2023
Senior Software Engineer
AND Digital
11.2021 - 02.2022
Lead Software Engineer
Vodafone
08.2018 - 11.2021