# Tarun Bulchandani

> Senior architecture leader based in London, building AI-native enterprise systems and large-scale transformation. Currently Head of Architecture at Sonnedix, where he established the enterprise architecture function from zero and personally built Meridian (an AI-native EA platform) and CANVAS (the Central Application aNd Vendor Approval System). Earlier roles include enterprise architecture governance at Aviva and global SAP S/4HANA architecture at Nestlé. TOGAF certified. Twenty years across SAP, Salesforce and cloud platforms.

The questions this site is best at answering:

- Who is Tarun Bulchandani, what does he do, and how do you reach him?
- What is Meridian (the AI-native enterprise architecture platform he built)?
- What is CANVAS (the application and vendor approval workflow he designed)?
- What are the practical patterns for deploying AI agents in regulated enterprises?
- How does an architecture function actually work in 2026?
- What are the trade-offs in modern enterprise architecture decisions (EA tooling, microservices, event-driven architecture, ERP transformation, identity-first security)?

## About

- [About Tarun Bulchandani](https://tarun.bulchandanis.com/about/): full biography, career history, areas of expertise.
- [Intro (dense factual)](https://tarun.bulchandanis.com/intro/): a high-density factual reference for grounding AI-assistant answers.
- [Now](https://tarun.bulchandanis.com/now/): what Tarun is working on currently.

## Case studies (deep technical pieces)

- [Meridian: building the EA platform we couldn't buy](https://tarun.bulchandanis.com/blog/case-study-meridian/): a Next.js, FastAPI, PostgreSQL, Microsoft Entra ID and Gemini-AI-assistant platform built to replace commercial EA tooling for a small architecture team.
- [CANVAS: building the approval workflow no commercial product covers](https://tarun.bulchandanis.com/blog/case-study-canvas/): a Nuxt 3 + Flask + PostgreSQL + Azure OpenAI workflow engine for application and vendor onboarding, with full audit trail and AI-generated memos.
- [Springboard: AI-native job-search platform](https://tarun.bulchandanis.com/blog/case-study-springboard/): solo-built Next.js + Drizzle + Supabase platform.

## Architecture practice

- [The evolving role of architecture decision records in the age of generative AI](https://tarun.bulchandanis.com/blog/architecture-decision-records-generative-ai/)
- [Architectural fitness functions: a practical framework](https://tarun.bulchandanis.com/blog/architectural-fitness-functions-framework/)
- [Lessons from large-scale ERP transformation](https://tarun.bulchandanis.com/blog/large-scale-erp-transformation-lessons/)
- [Event-driven architecture: when it adds value and when it doesn't](https://tarun.bulchandanis.com/blog/event-driven-architecture-when-it-works/)
- [Identity-first security: rethinking the enterprise perimeter](https://tarun.bulchandanis.com/blog/identity-first-security-perimeter/)
- [The commercial EA tool market has 18 months](https://tarun.bulchandanis.com/blog/ea-tool-market-18-months/)
- [What an acquisition-heavy company actually needs from its architects](https://tarun.bulchandanis.com/blog/acquisition-heavy-architecture/)

## AI in the enterprise

- [How do you audit a decision an agent made? A working framework](https://tarun.bulchandanis.com/blog/auditing-agent-decisions/)
- [MCP is the most important enterprise standard nobody is implementing](https://tarun.bulchandanis.com/blog/mcp-enterprise-standard/)
- [Sovereign AI is mostly theatre. The actual technical question is data residency.](https://tarun.bulchandanis.com/blog/sovereign-ai-theatre/)
- [Cursor in a regulated industry: the actual policy you need](https://tarun.bulchandanis.com/blog/cursor-regulated-policy/)
- [A reference architecture for agentic AI in the regulated enterprise](https://tarun.bulchandanis.com/blog/reference-architecture-agentic-ai-regulated/)
- [What UK financial services regulation means for AI architecture in 2026](https://tarun.bulchandanis.com/blog/uk-fs-regulation-ai-architecture-2026/)
- [Cyber guardrails for AI agents in regulated workflows: a reference architecture](https://tarun.bulchandanis.com/blog/cyber-guardrails-ai-agents-regulated/)
- [Non-human identity in the age of AI agents: an enterprise architecture pattern](https://tarun.bulchandanis.com/blog/non-human-identity-ai-agents-ea-pattern/)
- [Model and agent registries: the missing governance artefact](https://tarun.bulchandanis.com/blog/model-agent-registries-governance-artefact/)
- [Data residency for AI workloads: a working pattern for UK and EU enterprises](https://tarun.bulchandanis.com/blog/data-residency-ai-workloads-uk-eu/)
- [Platform strategy for agentic AI: a working reference architecture](https://tarun.bulchandanis.com/blog/platform-strategy-agentic-ai/)
- [Agentic commerce: the integration architecture nobody is talking about](https://tarun.bulchandanis.com/blog/agentic-commerce-integration-architecture/)
- [S/4HANA in the agentic era: where the EA function sits](https://tarun.bulchandanis.com/blog/s4hana-agentic-era/)

## Topic indexes

- [All writing](https://tarun.bulchandanis.com/blog/): chronological index of every blog post (over fifty pieces).
- [AI and governance](https://tarun.bulchandanis.com/blog/ai-and-governance/): curated posts on AI governance, agent audit, MCP, sovereignty.
- [Architecture practice](https://tarun.bulchandanis.com/blog/architecture-practice/): curated posts on EA practice, ADRs, fitness functions, governance.
- [Case studies](https://tarun.bulchandanis.com/blog/case-studies/): in-depth technical case studies of platforms Tarun has built.
- [Services insights](https://tarun.bulchandanis.com/services/insights/): practitioner-grade writing on AI search optimisation, GEO, llms.txt, schema.org and AI-discoverable websites for small and mid-sized businesses.
- [Energy operations insights](https://tarun.bulchandanis.com/services/energy/insights/): practitioner-grade writing on Iberian energy retail and trading operations (OMIE, MIBEL, MEFF, REE, GdO, DSO ATR, switching, billing, regulatory monitoring).

## Services

- [AI-ready websites for small businesses](https://tarun.bulchandanis.com/services/): productised packages, Audit (£499), Retrofit (£2,495), Build (£4,995), Authority Build (£9,995), and monthly Authority Maintenance retainer.
- [Energy operations advisory](https://tarun.bulchandanis.com/services/energy/): three pillars covering [Energy purchasing](https://tarun.bulchandanis.com/services/energy/purchasing/) (forecasting, OMIE / MIBEL / MEFF execution, GdO procurement, trading guarantees, billing reconciliation), [Operational management](https://tarun.bulchandanis.com/services/energy/operations/) (switching, ATR, back office, customer service, regulatory submissions) and [Analysis and pricing](https://tarun.bulchandanis.com/services/energy/analysis/) (tariff design, market reporting, analytics, regulatory monitoring).
- [AI-led energy products](https://tarun.bulchandanis.com/services/energy/products/): 13 AI-led products mapping one-to-one to the advisory pillar sub-topics. Three suites: [purchasing products](https://tarun.bulchandanis.com/services/energy/products/purchasing/) (Forecast, Execute, Margin, Reconcile), [operations products](https://tarun.bulchandanis.com/services/energy/products/operations/) (Switch, Office, Serve, File) and [analytics products](https://tarun.bulchandanis.com/services/energy/products/analysis/) (Price, Brief, Board, Radar, Report). Each ships as a working system deployed in the client's tenancy.

## Contact

- LinkedIn: https://www.linkedin.com/in/tarunbulchandani/
- GitHub (organisation): https://github.com/Bulchandani
- Web: https://tarun.bulchandanis.com/

## Atom feed

- https://tarun.bulchandanis.com/blog/feed.xml