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Jonathan UserJU
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Jonathan User

@jonathan-david-hussey

Experienced software engineer specializing in scalable APIs, event-driven data pipelines, and AI-driven systems.

Jamaica
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What I'm looking for

I’m looking for a role where I can build scalable, event-driven platforms and real-time pipelines, integrate AI (LLMs/RAG) responsibly, and ship measurable improvements through clean architecture, automation, testing, and strong observability.

I’m an experienced software engineer with 14+ years building scalable APIs, event-driven architectures, data pipelines, and cloud integrations across Government, Telecoms, Healthcare, Energy, Research, Social Analytics, Real Estate, Finance, and AI. I thrive on turning messy systems into reliable platforms through architecture, clean engineering practices, and measurable performance wins.

Most recently, I established a team’s first API platform (50+ endpoints) and built event-driven workflow engines (7+ workflow types) using .NET 9, C#, EF Core, and SQL Server—backed by CI/CD, clean architecture, strong testing, observability, and structured error handling. Previously, I drove major search and ingestion improvements at Onalytica (92% infrastructure cost reduction, 89% search latency improvement) and delivered real-time, multi-tenant AI call-management and orchestration systems using NestJS, GPT-4o, and RAG integration.

Experience

Work history, roles, and key accomplishments

Technology Innovation Institute (TII) logoTT

Software Engineer

Technology Innovation Institute (TII)

Jun 2025 - Mar 2026 (9 months)

Established TII’s first API platform with 50+ endpoints and delivered 7 SAP enterprise integrations, replacing direct database access with structured API contracts. Built an event-driven workflow engine supporting 7+ workflow types (2–4 approval steps each) and introduced Clean Architecture, automated CI/CD, and enhanced observability for faster diagnosis of workflow failures.

Rafahia Real Estate logoRE

AI Automation Engineer

May 2025 - Jun 2025 (1 month)

Engineered AI-driven content aggregation pipelines that processed 236 RSS feeds across 6 social platforms, automating extraction, language detection/translation, and publishing to the Circle community platform. Implemented custom JavaScript transformations in Zapier and built modular per-platform tagging/organization using RSS.app to route content into dedicated Circle spaces.

AC

Staff Software Engineer

Actualize

Jun 2024 - Mar 2025 (9 months)

Led architecture and implementation of a generative AI call management system for 7 enterprise clients, handling hundreds of outbound calls daily using NestJS, TypeScript, Node.js, MySQL, Redis, and Vapi. Built a unified orchestration layer integrating 7+ external APIs (Twilio, Vapi, Freshdesk, WhatsApp, RAG, Fareye), implemented autonomous agentic workflows with GPT-4o, and added multi-tenant aut

Onalytica logoON

Senior Software Engineer

Onalytica

Aug 2019 - May 2024 (4 years 9 months)

Drove a 92% reduction in infrastructure costs and 89% improvement in search latency for the flagship product by analyzing 20+ CloudWatch metrics and optimizing Elasticsearch (index restructuring and query optimization). Eliminated recurring platform-wide outages by redesigning the core search API with a producer/consumer architecture, improved client export performance from 30 minutes to 30 second

BI

Software Engineer

Biotronics3D

Nov 2017 - Aug 2019 (1 year 9 months)

Shipped 7+ real-time features (chat, notifications, data sync, conflict resolution, VOIP, subscriptions, presence) for a Radiology Information System used by tens of healthcare clients and supporting thousands of concurrent users. Delivered WebRTC-based VOIP with live call state tracking, implemented live data synchronization with WebSockets, and built conflict-resolution and notification framewor

GE

Software Engineer

GE Energy

Nov 2015 - Oct 2017 (1 year 11 months)

Led end-to-end integration of Distribution Management System data into an external dashboard, delivering 6–8 real-time widgets for energy grid visibility and implementing REST services and secure inter-system communication. Resolved a long-standing UI layout defect and built a hyperparameter optimization framework to automatically select and tune 30+ machine learning models for electric load forec

WA

Lead Frontend Software Developer

Winterwell Associates

Feb 2014 - Nov 2015 (1 year 9 months)

Built a configurable real-time dashboard framework for visualizing AI-classified social media data using drag-and-drop widgets with multiple chart/table/text visualizations and live updates. Improved cross-device usability by migrating to Bootstrap, and built real-time social media calendars and a learning centre with guided onboarding experiences.

Education

Degrees, certifications, and relevant coursework

Edinburgh Napier University logoEU

Edinburgh Napier University

Master of Engineering (MEng), Software Engineering

2010 - 2015

Grade: First Class Honours

Master of Engineering (MEng) in Software Engineering, awarded First Class Honours. Received University Medal and British Computing Society Prize.

Edinburgh College logoEC

Edinburgh College

Higher National Certificate (HNC), Interactive Media

2010 -

Higher National Certificate (HNC) in Interactive Media.

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