$ ls ./expertise

Technical expertise

04 / 06

Grouped by domain, not scored, and every group names where I used it. Backend and cloud are the core; the AI engineering band started in 2026.

backend-and-infra/— primary focus

Where most of my five-plus years went: Node.js APIs and shared platform services over relational and document databases, on AWS.

01 Backend

NestJS at Techtiz, serverless Node.js at TechBucks, Node.js services on AWS at 10Pearls, Express on D[AI]LY.

Node.js
Express.js
NestJS
REST API design
Socket.IO
Serverless
Microservices

02 Data & State

MongoDB at Techtiz and on Taleharbor, PostgreSQL on ConstructPro and Teamstart, MySQL at TechBucks and Asian Solutions.

PostgreSQL
MongoDB
MySQL
Redis (sessions, state, caching)
Schema design
Indexing

03 Architecture & Scale

A serverless API layer absorbing 10,000+ concurrent requests at TechBucks, off-request-path jobs on D[AI]LY, and multi-tenant design at Techtiz.

System design
API gateway patterns
Horizontal scaling
Background job offloading
High-concurrency request handling
Query & schema optimisation

04 Cloud

Lambda, API Gateway and S3 at TechBucks and on D[AI]LY; AWS across the product at 10Pearls.

AWS Lambda
API Gateway
EventBridge
EC2
EBS
S3
CloudFront
CloudWatch
DigitalOcean

05 Multi-Tenancy

Per-client databases at Techtiz; semi-multi-tenant scheduling on Teamstart.

Per-tenant database isolation
Semi-multi-tenant architectures
Request-time DB injection per tenant

06 Event-Driven

S3 event notifications, scheduled triggers and off-request-path jobs at TechBucks.

AWS EventBridge
S3 event notifications
Socket.IO real-time channels
Async job distribution

07 Identity & Security

Enterprise SAML 2.0 single sign-on across 10+ identity providers at Asian Solutions; patient data isolation between healthcare tenants at Techtiz.

SAML 2.0 SSO
OAuth 2.0
JWT
Tenant data isolation
Assertion validation
Certificate management
Attribute mapping
Auto-provisioning

08 Integrations

Bexio accounting on ConstructPro, WordPress and Webflow publishing on D[AI]LY, and the ticketing portal at Techtiz.

Bexio
WordPress API
Webflow API
Third-party ticketing portals

ai-engineering/— python, since 2026

Added in 2026 and shipped as product features, with the same cost, latency and failure budgets as any backend.

09 GenAI & LLM Engineering

LLM integration and fine-tuning at 10Pearls since January 2026; LLM content generation on D[AI]LY.

LLM API integration (OpenAI, Anthropic, open models)
Prompt design & structured output
Tool use / function calling
LangChain
Streaming responses
Token, cost & latency budgeting
Output evaluation
Fine-tuning incl. QLoRA

10 RAG

RAG pipelines at 10Pearls since January 2026, and the 2026 AI Engineer Core Track.

RAG pipelines
Chunking strategies
Embeddings & vector databases
Context assembly & grounding
Retrieval quality evaluation

11 Agentic AI

A multi-agent pipeline that takes Trello cards from ticket to deploy, and Trello-to-Claude Code webhooks on ConstructPro, since 2026.

Multi-agent orchestration (planner, implementer, verifier, fixer)
Plain-code state machines for headless agents
Isolated git worktrees & structured handoffs
Human-approved CI/CD deploys
MCP connectors & custom servers
Spec-first development with Claude Code
Webhook-triggered agent runs (Trello, Pipedream)

supporting/— languages, frontend, delivery

The rest of what it takes to ship: languages, frontend and the path to production.

12 Languages

TypeScript and JavaScript across every Node.js role; Python for GenAI work since 2026; SQL with PostgreSQL and MySQL.

TypeScript
JavaScript (ES6+)
Python (intermediate)
SQL

13 Frontend

React on ConstructPro, D[AI]LY and Taleharbor, Next.js at 10Pearls, and Astro for this site.

React.js
Next.js
Vue.js
Astro
HTML/CSS

14 DevOps

Docker and multi-environment CI/CD on Teamstart.

Docker
Git
Linux
GitHub Actions
Multi-environment CI/CD

15 Testing

Unit tests in Jest across the Node.js services, in Agile delivery teams.

Jest
Unit testing
Agile delivery