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Simon Hughes

@simonhughes

I build cloud platforms, event-driven systems, and AI integrations that reduce cost and scale reliably.

I've led cloud architecture and delivery for JEM, Gluwa, D55, ZPN Energy, and ByBox, taking greenfield systems from inception to production at scale.

At JEM, I cut AWS spend by 50% and built a C# agentic MCP server that lets Claude test a CitrineOS charging platform. At Gluwa, I improved a 100,000-row PostgreSQL import from two minutes to 1.26 seconds and reduced database infrastructure costs by 50%.

I build event-driven platforms across AWS and Azure, including energy billing, document intelligence, EV charging, warehouse management, and blockchain services. I also lead technical teams, communicate architecture strategy to senior stakeholders, mentor developers, and publish courses for Pluralsight and Packt.

Experience

Work history, roles, and key accomplishments

Current

Senior Solutions Architect

Current

JEM

Jun 2026 - Present (3 months)

Cut a client's AWS spend by 50% by right-sizing databases and Fargate tasks and removing unused resources. Built an agentic MCP server in C# for testing a CitrineOS charging platform and fixed defects in the open-source platform.

AWS Fargate C#.NET PostgreSQL MCP MQTT OCPP Docker Everest CitriNet

Senior Software Engineer

Gluwa

Feb 2025 - Mar 2026 (1 year 1 month)

Improved PostgreSQL write performance by over 80x and reduced database infrastructure costs by 50% with Azure SQL elastic pool. Built a C# blockchain account-balance indexer and heuristic bot detection API.

Azure Kubernetes C#.NET 10 SQL Server PostgreSQL Redis REST APIs Docker Cursor Blockchain DeFi

Solution Architect

D55

Oct 2021 - Feb 2025 (3 years 4 months)

Led architecture across five client engagements with agile delivery, leading small development teams and working with stakeholders from requirements to production. Architected solutions for energy, maritime intelligence, and stakeholder management clients.

AWS Textract Lambda Step Functions EventBridge Amazon SQS DynamoDB C#SQL Server Kafka MySQL

Software Architect / Chief Technology Officer

ZPN Energy

Sep 2018 - Oct 2021 (3 years 1 month)

Owned technology strategy, presented roadmaps to the board, and pitched to clients and investors. Designed and built software for a battery-backed 50kW EV charger, from firmware to cloud platform, and created the OCPP 2 charge point management system.

Azure C#SQL Server Azure DevOps CI CD Power BI OCPP 2.0.1 MQTT Event Driven Architecture

Lead Software Developer

ByBox

Mar 2005 - Sep 2018 (13 years 6 months)

Architected and developed Thinventory, a warehouse management system adopted by 97% of new ByBox customers across 250+ European warehouses. Improved scanner data processing performance 60x and implemented SQL Server replication for offline operation.

C#SQL Server Entity Framework LINQ MSMQ REST APIs Event Driven Architecture