Alex Connolly

I enjoy building things that matter.

Twelve years building distributed, event-driven, multi-tenant systems at scale — most recently a change-propagation platform moving more than 70 million events a day.

I care most about the parts that don't demo well: hot paths, failure modes, and the generic layer that turns a change across twenty integrations into a one-line edit.

Senior software engineer · Londonalex.connolly.engineer@gmail.com

Work

Linnworks · 12 years · E-commerce operations SaaS · London · one company, five roles

Oct 2014

Software Engineer

Platform

Built the developer ecosystem and app store — payments, recurring billing, third-party integrations — now hosting 150+ apps.

  • C# · .NET · JavaScript

Jul 2017

Software Engineer

Order Management

Batch inventory tracking that opened an entirely new industry vertical, plus a high-volume open-orders screen on Redis and MSSQL.

  • C# · Redis · MSSQL

Jan 2022

Engineering Team Lead

Analytics

Launched a customer-facing analytics product from zero: hired and led five engineers across five countries, ETL moving 20M+ records a day.

  • PostgreSQL · ETL · C#

Jan 2024

Senior Software Engineer

Carrier Solutions

Delivered a full system rewrite on schedule with 70% less follow-up rework, and a generic data layer that made twenty-carrier edits one-line changes.

  • C# · .NET · Azure

Mar 2026 — now

Senior Software Engineer

Software Architect

Change propagation across products at 70M+ events a day, and a broker that resolves which product owns each entity, per tenant.

  • C# · Azure Service Bus · TypeScript

Stack

  • InterfacesTypeScript · React — enough to be useful, not my home
  • Services & APIsC# · .NET — and the contracts other teams build against
  • Distributed systemsAzure Service Bus · Kafka · SQS/SNS — queues, retries, idempotency
  • DataPostgreSQL · MSSQL · Redis · ETL — schemas, migrations, query plans
  • AI & agentsClaude Code · Codex · RAG · local open-weight models
  • InfrastructureDocker · GitHub Actions · AWS Lambda, S3 · Hangfire

Bar length is where I actually spend my time, not what I could put on a CV.

Highlights

  • Change propagation at 70M events a day

    2026An Azure Service Bus platform distributing data to tenant-specific platforms across multiple products, with a broker resolving source of truth per tenant.Azure Service Bus · C# · multi-tenant

  • Agents that replaced a £60k/year system

    2025Internal AI agents built and shipped to production, then agentic delivery rolled out across engineering — one team cut a sprint's work to a day.Claude Code · RAG · agentic design

  • An analytics product from zero

    2022Hired and led a greenfield team of five across five countries, shipping stock forecasting and BI dashboards to 2,000 customers on a 20M-record-a-day ETL.PostgreSQL · ETL · team of five

Contact

Fancy a chat?

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