Alex S.

I connect business systems to AI. 20 years building CRM, ERP and accounting integrations for Australian, US and UK companies (HubSpot, Salesforce, Zoho, Xero, MYOB), and most recently CTO of an AI marketing SaaS where I shipped generative-AI and LLM pipelines in production (AWS Bedrock, OpenAI, Temporal workflows). $900K+ earned on Upwork, 100% Job Success, 15,000+ hours, Top Rated Plus. Every integration I ship is secure by default: read-only where possible, audit-logged, consent-aware, no personal data at rest unless you need it. WHAT I BUILD • AI agents that work inside your existing systems: read the CRM, draft quotes, triage enquiries, reconcile invoices, with audit logs and human approval before anything sends. • Integrations between the tools you already pay for: HubSpot ↔ Salesforce, CRM → Klaviyo, Xero or MYOB ↔ your app, marketplaces ↔ inventory (FlxPoint, Cin7, BigCommerce). • Custom Laravel, Node.js or Python back ends and REST/GraphQL APIs when off-the-shelf tools run out. • Rescue and rebuild of broken n8n, Make and Zapier automations. • Long-term ownership: monthly retainers for the systems I build. RECENT RESULTS • AI marketing SaaS (CTO, 2023–2025): led a ~200,000-line platform — Neo4j + PostgreSQL GraphQL API, Temporal workflows, 12 social and ad-platform integrations (Meta Ads, Instagram, LinkedIn, YouTube, Reddit, X) including the Meta app review and Google verification approvals, Stripe subscriptions with quota enforcement, generative-AI ad creatives and LLM classification, extraction, sentiment and summarisation services on AWS ECS, 150+ automated tests. • Childcare group (via a Sydney agency): CRM → Klaviyo bridge replacing a Zapier build. 3,370 families synced at cutover, 15-minute sync, no personal data at rest, 181 automated tests, 7 CloudWatch alarms. Live since August 2026, delivered in 8 weeks. • Pest-control franchise: ERP with a built-in cloud call centre (Twilio IVR, voicemail, after-hours routing, operator presence), suburb-based technician scheduling, invoicing, SMS campaigns and 12 management reports. 10 years in production, upgraded through to Laravel 12. • Security services company: CRM/ERP for guard rosters, patrols, alarm response and key management, with Xero invoicing, Deputy rostering and TrackTik integrations and automated nightly contract billing. 6 years as sole developer. • E-commerce retailer: integration middleware connecting BigCommerce, FlxPoint, Cin7, Prisync and TestFreaks — 10 scheduled sync jobs for orders, inventory, purchase orders and repricing, delivered in 4 months ("almost no revisions required", client). • DTC e-commerce brand (Shopify AU/US, Amazon, eBay, three 3PLs): paid technical audit and orchestration architecture, 43 pages across 4 documents, covering bundle-aware routing, inventory normalisation and source-of-truth boundaries; the blueprint for a fixed-price build. • Industrial inspection SaaS: 7 years modernising a multi-tenant Laravel platform (6 roles, 3 report formats, 126 migrations), now adding a read-only MCP gateway so AI assistants can query it safely. • Education provider: bidirectional Salesforce ↔ HubSpot sync across 10 record types, idempotent re-runs with per-record audit logs. HOW I WORK Brisbane time zone, overlapping US mornings and UK afternoons. Replies within the hour on business days. Describe the problem in business terms; I turn it into a written scope, architecture and fixed price, then build it. I build with Claude Code and ship with CI (static analysis, automated tests), scripted AWS provisioning, runbooks and a handover pack. Clean, SOLID code your next developer can read. SYSTEMS INTEGRATED IN PRODUCTION CRM: HubSpot, Salesforce, Zoho, Klaviyo, LineLeader · Accounting: Xero, MYOB, Stripe · Commerce: Shopify, BigCommerce, Amazon, FlxPoint, Cin7, Prisync, TestFreaks, Australia Post, CouriersPlease · Comms: Twilio (voice, IVR, SMS), SendGrid, Pusher · Workforce: Deputy, TrackTik · Social and ads: Meta Ads, Google Ads, LinkedIn, Instagram, YouTube, X, Reddit; TikTok and others on request · AI: OpenAI, AWS Bedrock, Google Vertex AI, IBM watsonx, Mistral, Stable Diffusion on AWS. I build from scratch (the ERPs, the SaaS platform and the middleware above) and take over what others left: a Salesforce ↔ HubSpot sync rebuilt from an inherited codebase, a Zapier build replaced with code. If the last developer could not finish it, send me what they left. Built and shipped a privacy-preserving AI platform (RAG on AWS Bedrock) for a regulated Australian sector. STACK PHP/Laravel · Node.js/TypeScript · Python · React · PostgreSQL/MySQL/Neo4j · GraphQL · AWS (ECS, RDS, Bedrock, SES, S3, CloudWatch) · Docker · Temporal · GitHub Actions · OpenAI and Claude APIs · MCP · n8n · HubSpot · Salesforce · Zoho · Klaviyo · Shopify · Xero · MYOB · Stripe · Twilio · Meta and Google Ads APIs If you have a system that should be talking to another system, or to an AI, message me with what it does today and what you want it to do.