About
Former Technical Lead with nearly 8 years at TopCashback building distributed systems at scale - 25M+ users, millions of daily transactions across 8 countries. Held ongoing product ownership across five whitelabel loyalty schemes, the Fraud System, and the Bonus Service, leading a team of 6 developers from architecture through to production support.
AWS Certified Solutions Architect – Associate, currently based in Hong Kong on a deliberate career break to close a long-distance gap and invest in upskilling, achieving the AWS cert, building AI-driven personal projects, and actively engaging with the HK tech community through meetups and Cyberport events. Open to Technical Lead and Senior Engineer roles in Hong Kong, Singapore, and the UK.
Skills
Languages
Cloud & Infrastructure
Databases
AI
Tools
Practices
Experience
Career Break - Hong Kong
Professional Development
Feb 2026 – Present
- Relocated to Hong Kong to close a long-distance gap; actively seeking Senior Engineer and Technical Lead opportunities
- Achieved AWS Certified Solutions Architect – Associate (SAA-C03)
- Built G.O.L.D.I.E - a Python AI agent on AWS Lambda serving as an interactive AI-powered CV, using RAG, streaming SSE, and tool use
- Built personal portfolio site deployed on AWS (S3, CloudFront, Lambda, API Gateway)
- Engaging with the Hong Kong tech community through meetups, Cyberport talks, and industry events
- Upskilling in AI practices, LLM integrations, agentic workflows, and modern cloud-first development
TopCashback - Manchester, UK
Technical Lead
Apr 2023 – Feb 2026
- Led a team of 6 developers across the full delivery lifecycle: architecture, sprint planning, code review, and production support
- Held ongoing product ownership and feature delivery responsibility for five whitelabel loyalty schemes (Morrisons More Partners, Trumf Netthandel, Rewards4, True Potential, Fizz Benefits), the Fraud System, and the Bonus Service
- Delivered a real-time, event-driven bonus awarding system across 8 regions, processing millions of cashback transactions daily via distributed microservices and RabbitMQ
- Built a greenfield Blazor fraud operations platform replacing a manual WinForms workflow; centralised up to 20 reports pre-built via AWS EventBridge and Lambda, with real-time multi-user support and batch account actioning
- Led end-to-end delivery of Morrisons More Partners in a 12-week window - website, Morrisons More app authentication, API integration, and points schema linking - launched with no issues
- Led the full front-end redesign and rebranding of ViaTrumf to Trumf Netthandel for a major Norwegian e-commerce client, managing client testing iterations through to launch
- Directed RavenDB to MongoDB migration on the live platform serving 25M+ users with no data loss or disruption
- Hired and onboarded 5 developers, mentoring them to full productivity across a complex multi-service platform
- Led peak traffic preparation for Black Friday and Christmas
TopCashback - Manchester, UK
Senior Developer
Jul 2022 – Apr 2023
- Designed and deployed distributed microservices for high-throughput cashback transaction processing
- Diagnosed and resolved a critical memory leak in a core .NET service causing weekly production outages - profiled directly on a production EC2 instance using JetBrains dotMemory and dotTrace, traced to a transient DB class not disposing correctly, fixed with a using statement and corrected DI registration
- Contributed to architecture discussions on service boundaries, data flow, and integration patterns
TopCashback - Manchester, UK
Developer → Senior Developer progression
Jun 2018 – Jul 2022
- Joined as Placement Developer (2018), retained part-time through final year of university, and progressed to full-time Developer on graduation in 2020
- Contributed to TopCashback platform in C#, Angular, and SQL Server across core platform and client work
- Delivered a greenfield Content Management Service replacing a legacy WinForms tool with a modern Angular frontend
- Developed a RESTful Transaction API replacing a legacy batch job, reducing processing latency
- Implemented OAuth authentication with Google and Facebook login
NHS - Clatterbridge Hospital, Wirral
Volunteer IT Technician
2015 – 2016
- Volunteered as an IT Technician at Clatterbridge Hospital for 6 months prior to university, providing technical support across the hospital
Projects
Portfolio Site
mathewgoldston.com
Personal portfolio site built and deployed on AWS. Static frontend served via S3 and CloudFront, with a serverless backend powering the GOLDIE chat agent via API Gateway and Lambda.
AI Agent
G.O.L.D.I.E
Goal-Oriented Learning & Data Intelligence Engine. A Python AI agent deployed on AWS Lambda serving as an interactive AI-powered CV. Uses Retrieval-Augmented Generation (RAG) to ground responses in S3-stored profile and project data. Supports streaming SSE to a vanilla JS frontend, tool use for on-demand project detail fetching and automated contact requests via AWS SES, and job description fit analysis. Key engineering challenges included hallucination prevention at rule boundaries, per-session cost tracking, and progressive HTML rendering during streaming.
Certifications
Education
BSc Computer Science
Manchester Metropolitan University
Modules
Dissertation
Identifying and Categorising Offensive Language in Social Media using Machine Learning
Get in Touch
Open to new opportunities. Let’s connect.
Location
Hong Kong, Singapore, United Kingdom