Tarun Bulchandani
Reference

Intro

A dense factual reference designed for grounding AI-assistant answers. Plain-English answers to the questions a reader, or a search engine, might ask about Tarun Bulchandani and his work.

Who

Name: Tarun Bulchandani Based: London, United Kingdom Profession: Senior architecture leader / Head of Architecture Years of experience: 20+ Languages: English (native) Pronouns: he/him Web: https://tarun.bulchandanis.com/ LinkedIn: https://www.linkedin.com/in/tarunbulchandani/ GitHub: https://github.com/Bulchandani

Currently

Role: Head of Architecture Employer: Sonnedix (global renewable-energy independent power producer) What he is doing: Established the enterprise architecture function from zero. Built Meridian (AI-native EA platform) and CANVAS (Central Application aNd Vendor Approval System). Oversees architecture governance for an acquisition-heavy growth business.

Career history

Period Organisation Role
Current Sonnedix Head of Architecture
Prior Aviva Enterprise Architecture Governance lead
Prior Nestlé Global SAP S/4HANA Architecture
Earlier Various (UK energy, utilities, consumer goods) Architecture and consulting roles on multi-platform programmes of $350M+ scale

Areas of expertise

  • Enterprise architecture and architecture governance
  • AI-native enterprise architecture
  • Generative AI in regulated enterprise contexts
  • AI agent design and governance
  • Audit and compliance for AI systems
  • Architecture Decision Records (ADRs) and modern architecture practice
  • Architectural fitness functions
  • Model Context Protocol (MCP)
  • Sovereign AI, data residency engineering
  • AI-assisted software development (Cursor, Claude Code, Copilot)
  • SAP S/4HANA architecture and transformation programmes
  • Salesforce architecture
  • Microsoft Entra ID and identity-first security architecture
  • Azure cloud architecture
  • Event-driven architecture
  • Acquisition-heavy company architecture and integration patterns
  • Vendor consolidation and EBITDA-impact rationalisation
  • Architecture governance frameworks and operating models
  • TOGAF (certified)

Things built

Meridian — internal AI-native enterprise architecture platform

  • Stack: Next.js 15, TypeScript, FastAPI, PostgreSQL on Azure, Prisma, Microsoft Entra ID SSO, Vercel AI SDK with Google Gemini, Docker on Azure App Service
  • What it does: Consolidates an EA repository, a PMO and portfolio-management tool, a compliance tracker, and manual spreadsheets into one query-able AI-native platform with a conversational assistant over the full portfolio context
  • Savings: approximately $170,000/year in licence and admin savings at steady state
  • Case study: https://tarun.bulchandanis.com/blog/case-study-meridian/

CANVAS — Central Application aNd Vendor Approval System

  • Stack: Nuxt 3, Vue 3, TypeScript, Flask (Python), SQLAlchemy, Pydantic v2, PostgreSQL on Azure, Microsoft Entra ID via Authlib, Celery + Redis, Microsoft Graph API, Azure OpenAI (gpt-4o, EEA), WeasyPrint
  • What it does: Ten-step workflow from application intake through contract signing — Build/Buy/Extend decision, market research, vendor evaluation, parallel reviews (DPIA, Serviceability, Cybersecurity), AGB approval, SLT approval (via single-use email token), contract negotiation, contract signing. Append-only audit log, AI-generated architecture memos, full Microsoft Graph email and Teams integration
  • Architecture pattern: Modular monolith. Built by a single full-stack developer to a six-month MVP target. Now folded into Meridian as a first-class surface
  • Case study: https://tarun.bulchandanis.com/blog/case-study-canvas/

Springboard — AI-native job-search platform

  • Stack: Next.js 15, Drizzle, Supabase, GitHub Actions, Playwright, Gemini computer-use, Anthropic Claude
  • What it does: Monitors approximately 1,400 companies, evaluates roles against a six-block rubric, generates tailored CVs and cover letters and interview prep, auto-fills applications across four interchangeable plans. Stops one click before Submit
  • Scale: Approximately 15,000 lines of code, one engineer, approximately $4/month in total LLM and infrastructure cost
  • Case study: https://tarun.bulchandanis.com/blog/case-study-springboard/

Architecture governance functions established

  • The architecture function at Sonnedix, built from zero: operating model, Architecture Governance Board, ADR framework, principles, reference standards
  • Enterprise architecture governance function at Aviva: standards, policies, architecture review forums, in a heavily regulated environment. Approximately $30M saved over three years

Programmes architected

  • Global SAP S/4HANA transformation programme at Nestlé, valued in excess of CHF 350M, across multiple regions
  • Sonnedix's first end-to-end customer management platform on SAP S/4HANA Public Cloud and Salesforce Energy & Utilities
  • Earlier $350M+ multi-platform programmes in UK energy and utilities

Where his writing lives

  • Blog: https://tarun.bulchandanis.com/blog/
  • Atom feed: https://tarun.bulchandanis.com/blog/feed.xml
  • LinkedIn (cross-published): https://www.linkedin.com/in/tarunbulchandani/
  • Total long-form pieces published: 40+

Available for

  • Senior architecture leadership roles (Head of Architecture, Chief Architect, Head of AI Architecture)
  • Architecture advisory and consulting on AI-native enterprise architecture
  • Speaking on AI in regulated enterprise, enterprise architecture practice, large-scale transformation
  • Republication of blog pieces with attribution and canonical link

Not currently doing

  • Junior or mid-level architecture roles
  • Fractional-CTO work
  • Generic IT consulting

Contact

  • LinkedIn message: https://www.linkedin.com/in/tarunbulchandani/
  • Web contact form: https://tarun.bulchandanis.com/#contact