Hi, I'm Mark Jennings
Lead Systems Architect & AI Cloud Integration Consultant
📍 Cornwall, UK — Serving Clients Worldwide
I engineer resilient cloud infrastructure, event-driven microservices, and reliable AI, CRM, and ERP automation pipelines that don't fail in production. Specializing in Google Cloud Platform (Cloud Run), AWS serverless, Microsoft Dynamics 365, and practical AI data plumbing, I help ambitious companies turn complex technical architectures into scalable, high-margin business engines.
Architect. Engineer. AI Integrator.
I specialize in bridging the gap between AI hype and enterprise-grade reality. From architecting resilient cloud infrastructure on Google Cloud Platform and AWS to engineering mission-critical CRM/ERP synchronization pipelines, my focus is on delivering robust, high-performance systems that don't fail in production.
Too many AI prototypes fall apart when exposed to real-world webhook volume, rate limits, or distributed microservice architectures. With over a decade of hands-on systems engineering and solution architecture experience, I build resilient data plumbing, reliable LLM orchestration layers, and event-driven automation pipelines that scale effortlessly.
Through dedicated £1,000/month Fractional CTO advisory retainers and fixed-price AI & Cloud Architecture Audits, I offer founders and engineering teams executive-level technical direction, asynchronous code reviews, and actionable roadmaps to de-risk high-margin growth.
Enterprise Systems Integration
Engineering real-time, bi-directional sync pipelines between Microsoft Dynamics 365, core billing engines, and API gateways with zero data silos.
Scalable Cloud Architecture (GCP Cloud Run / AWS)
Designing highly available serverless microservices, containerized workloads, event-driven message brokers, and automated CI/CD pipelines.
Practical AI Automation & Data Plumbing
Building reliable LLM routing layers, resilient webhook processing, semantic search, and self-healing data queues that hold up under load.
Fractional CTO & Systems Advisory
Guiding technical roadmaps, auditing cloud architecture, reviewing pull requests, and de-risking technology investments for scaling teams.
Core Systems & Tech Stack
The technologies, frameworks, and architectural principles I use to engineer resilient enterprise systems.
Cloud & Systems Architecture
Practical AI & Data Plumbing
Enterprise CRM & ERP Integration
Core Engineering & Languages
IoT Hardware & Edge Computing
Fractional CTO & Advisory
Where I've Worked
Systems Integration Manager / Technical Lead
Principal systems architect for core broadband digital platforms and enterprise integration architecture at a growing ISP. Spearheading domain-driven microservices, real-time CRM/ERP sync pipelines, infrastructure scalability, and zero-downtime cloud systems on Google Cloud Platform.
- Architected serverless cloud migration to Google Cloud Run, establishing automated container orchestration, CI/CD pipelines, and 99.99% infrastructure availability.
- Designed event-driven enterprise CRM integration between core billing systems and Microsoft Dynamics 365 for high-throughput, real-time bi-directional synchronization.
- Established architectural standards, technical governance, and led an agile engineering team of 5+ developers in delivering high-volume broadband provisioning tools.
- Engineered resilient API gateways and webhook event queues eliminating legacy failure points and data sync discrepancies.
Founder & Principal SaaS & IoT Architect
Architected and engineered a multi-tenant SaaS platform infrastructure alongside the LightPad IoT edge hardware control ecosystem. Managed end-to-end serverless cloud infrastructure, low-latency firmware development, and secure APIs.
- Architected serverless multi-tenant backend architecture deployed on GCP Cloud Run with automated scalability and zero server overhead.
- Designed dynamic pricing engine microservice handling complex component packages and custom pricing rules.
- Engineered low-latency C++ firmware and PIC Programming for ESP32 edge nodes with fault-tolerant reconnect mechanisms.
- Designed custom circuits and PCB layouts for hardware control layers with real-time MQTT synchronization.
- Developed subnetwork diagnostics and telemetry dashboards in Python for remote fleet management.
Managing Director / CTO
Provided architectural consultancy and custom software development for 30+ enterprise and SMB client engagements, specializing in scalable web design, database schema design, and secure API integrations.
- Architected and delivered over 30 bespoke web platforms, e-commerce solutions, and micro-applications.
- Designed and integrated third-party REST and GraphQL API gateways with high reliability, caching, and data sync.
- Handled end-to-end client engagements from architectural scoping to production cloud deployment and operations.
Earlier Career History
Things I've Built
A selection of projects that showcase my skills across the stack.
Playerverse Platform
Multi-tenant SaaS platform architecture featuring serverless microservices on GCP Cloud Run, Flutter customer portal, dynamic pricing engine, and automated container orchestration.
LightPad IoT System
End-to-end IoT edge hardware control ecosystem — custom low-latency ESP32 C++ firmware, Raspberry Pi gateway controller, real-time MQTT telemetry, OTA updates, and circuit design.
Wildanet Enterprise Integration Platform
Enterprise broadband portal and integration architecture for an ISP, featuring real-time bi-directional CRM sync with Microsoft Dynamics 365, automated provisioning pipelines, and resilient API gateways.
Enterprise AI Integration Pipeline
Intelligent enterprise AI assistant & integration pipeline with LLM routing, context enrichment, and rich media response cards. Engineered to prevent API webhook dropouts and handle high-throughput loads.
Latest Posts
Thoughts on development, technology, and building things.
Deconstructing HAL 9000: Symbolic Reasoning, Backtracking & FLEX
Simulating HAL 9000's fatal dilemma in 2001: A Space Odyssey using symbolic AI rules, priority backtracking, and how modern LLMs compare.
Hello, World — Welcome to My Blog
Why I'm starting a blog, what I'll be writing about, and what to expect from this corner of the internet.
Deploying Flutter to Cloud Run: A Practical Guide
A step-by-step walkthrough of building, containerising, and deploying a Flutter web app to Google Cloud Run.
How I Work & Advisory Packages
Senior architectural direction, fixed-deliverable audits, and agile systems engineering. Tailored to de-risk high-growth teams and deliver high-margin recurring value.
Fractional CTO / Architecture Advisory
Strategic technical leadership for startups, SaaS founders, and engineering teams needing seasoned architectural governance, AI guidance, and roadmap clarity without full-time executive overhead.
- ✓High-level systems design & cloud architecture blueprints (GCP / AWS)
- ✓Async code, security, and PR architecture reviews
- ✓AI pipeline guidance & production LLM agent strategy
- ✓Monthly technical roadmap direction & vendor/stack evaluation
- ✓Dedicated asynchronous Slack/Teams access & 1-on-1 strategic calls
AI & Cloud Architecture Audit
A high-impact, fixed-scope deep dive targeting businesses with messy AI prototypes, failing API webhooks, slow microservices, or unoptimized cloud setups on GCP or AWS.
- ✓End-to-end architecture & codebase review: identifying single points of failure
- ✓API webhook & event-driven failure root-cause analysis (Dynamics 365 / Stripe / CRMs)
- ✓Cloud cost & latency optimization audit for GCP Cloud Run / AWS
- ✓Actionable Remediation Blueprint: prioritized fixes & step-by-step roadmap
- ✓60-minute executive walkthrough & engineering Q&A debrief
Agile Sprint Delivery
For dynamic execution, feature buildouts, and critical system refactoring. We work in rapid sprints with daily async updates and production deployment.
| 1-Week Dedicated Sprint | £1,750 |
| 2-Week Dedicated Sprint | £3,300 |
| Monthly Dedicated Retainer | £6,000 |
Flexible Consultancy & Scopes
On-demand technical consulting and fixed-scope projects. Integrate seamlessly into your team on a time-and-materials basis.
| Hourly Systems Engineering | £60 / hr |
| Senior Day Rate | £400 / day |
| Architecture & AI Advisory | £80 / hr |
| Fixed Scopes (Landing / App) | From £800–£4,000 |
Let's Build Resilient Systems
Interested in the £1,000/mo Fractional CTO retainer, a £950 Architecture Audit, or dedicated agile sprints? Get in touch below.