Architect · Founder

I build engineering
teams that ship.

22 years building software teams across energy, utilities, ERP, APIs, and AI. Two ventures cofounded. Now specialising in AI-enabled platform engineering.

22+
years experience
£140M
transformation delivered
2
ventures cofounded
Sandeep Sundaram
About

Built Data Equity. Built Perse.

Most recently Principal Architect and cofounder at Data Equity, where I led the architecture of an AI-driven data monetisation platform — from a generative-AI API schema builder trained on 16,000+ definitions, to a RAG-based enterprise contract generator on Mistral + LangChain, to a certified Peppol gateway for cross-border eInvoicing.

Before that I cofounded Perse Technologies, an energy-switching platform serving 50k+ concurrent users that exited successfully. Earlier I architected a £140M transformation at UK Power Networks and led Apigee's enterprise migrations for Dell, Intel, Vodafone, and the World Bank. Two decades of shipping enterprise software — and the teams that ship it.

Two areas I've gone deep on. API platforms and integration: 12+ years across Apigee (SOAP-to-REST, OAuth, SAML at Fortune 500 scale), IBM IIB / MQ / Datapower in regulated environments, MuleSoft and AWS API Gateway in cloud-native ones, Kafka for event-driven, and Data Equity's own API Studio + Marketplace end-to-end. Two decades thinking about where to put the boundary between systems and how to keep it stable as the business changes.

And energy & utilities: five years architecting UK Power Networks' £140M transformation across SAP, SCADA, telephony, workforce management, and contractor systems — then three more cofounding Perse, an automated consumer energy-switching platform integrated with industry data providers. I know this industry's regulatory shape, the legacy data integrations, and the customer-journey friction from both the supplier and the consumer side.

Work

22 years of leading teams that ship.

  1. Cofounder & Principal Architect
    Data Equity Ltd
    Mar 2023 – Feb 2026
    • Architected a generative-AI model trained on 16,000+ API definitions to auto-generate OpenAPI schemas; deployed on AWS SageMaker + API Gateway, infrastructure via AWS CDK and EKS.
    • Shipped a RAG-based enterprise contract generator on Mistral LLM + LangChain with AOSS vector storage; designed the end-to-end API lifecycle from DE API Studio through to DE API Marketplace.
    • Unlocked new revenue streams for gaming and shipping clients; $120K ARR in year one. Recruited and mentored a cross-disciplinary team across frontend, backend, DevOps, and data science.
    pythonlangchainmistralawssagemakercdkrag
  2. Cofounder & CTO
    Perse Technologies Ltd
    Feb 2020 – Feb 2023
    • Cofounded and led the technical vision for an automated utility-switching platform serving 50k+ concurrent users; led an ML initiative for usage patterns and personalised carbon management suggestions.
    • Provisioned AWS infrastructure (EC2, S3, IAM, Lambda) via Terraform with automated GitHub Actions CI/CD; delivered a first-of-its-kind capability to identify customer utility details that most consumers don't know themselves.
    • Up to £200/year savings per customer; led the business to a successful exit.
    awsterraformpythonnodereactml
  3. Principal Architect
    UK Power Networks
    Jan 2014 – Feb 2020
    • Designed the integration strategy and architecture for a £140M business transformation spanning SAP core, SCADA, telephony, workforce management, and contractor management systems.
    • Defined and delivered integration architecture across four major releases; established architectural governance and drove adoption of SOA/ESB patterns across the organisation.
    • Awarded 'Stellar Performer' for exceptional contribution to the programme.
    sapibm iibibm mqdatapowerapigeesoa
  4. Solutions Architect
    Apigee Technologies (Google)
    Nov 2011 – Jan 2014
    • Drove migrations and architectural design for 20+ enterprise API gateway customers including Dell, Intel, Vodafone, World Bank, FT, Burberry, and Target.
    • Migrated 20 enterprise customers from legacy Apigee 3.8 to the new web-based self-service platform with zero data loss; covered SOAP-to-REST transformation, SAML, OAuth, and data enrichment.
    • Won the CEO's 'Action & Passion' award for delivery excellence.
    apigeeapioauthsaml
  5. Earlier roles (Oracle, Accenture, 2004–2011)
    1. Principal Software Engineer
      Oracle India
      Jun 2005 – Nov 2011
      • Designed and delivered the first AIA integration using Oracle Fusion middleware; re-architected the PLM module on Oracle ADF.
      • Led the Agile PLM → Oracle Manufacturing synchronisation project.
    2. Software Engineer
      Accenture
      Jan 2004 – Jun 2005
      • Developed an HRIS for employee career management; received ACE Excellence Award.
Projects

Selected case studies.

AI-Powered API Schema Builder · Data Equity
2023
Generative-AI schema designer trained on 16,000+ API definitions, paired with a RAG enterprise contract generator.
60% automation lift

Problem

Enterprise API teams spend weeks turning ideas into well-formed, consistent API contracts, and even longer drafting the legal contracts that govern their use. We wanted to compress both into minutes without losing the rigour.

Approach

  • Fine-tuned a generative model on a corpus of 16,000+ OpenAPI definitions to suggest endpoints, schemas, and naming conventions matching house style.
  • Built a RAG pipeline over enterprise contract templates so the generator could draft clause-level language grounded in real precedent.
  • Wrapped both in a React workspace with reviewer-friendly diffs and one-click export to OpenAPI / Word.

Impact

  • 60% lift in document automation efficiency for enterprise contract drafting.
  • Anchor capability for Data Equity's commercial launch — first ARR landed within the first year.

Stack

pythonlangchainmistralaossaws sagemakeraws cdkreact
DE API Marketplace · Data Equity
2024
A unified marketplace for API discovery, integration, and monetisation — from DE API Studio authoring through to metered billing and analytics.
Swagger · Redoc · GraphQL

Problem

API providers want their endpoints discovered and integrated by the right developers fast; developers want a single place to evaluate, try, and pay for APIs without learning a new portal each time.

Approach

  • Designed a multi-tenant portal that ingests OpenAPI / GraphQL specs and renders Swagger and Redoc documentation side-by-side.
  • Modelled flexible commercials — subscription, pay-as-you-go, and freemium — with metered billing baked in.
  • Pre-built onboarding workflows for sign-up, key issuance, scoped permissions, and review-then-publish for provider-side governance.
  • Surfaced usage analytics for both providers and consumers to make commercial decisions data-driven.

Impact

  • Cut API time-to-market for providers — list, document, and meter in a single workflow.
  • Productised the platform that anchors Data Equity's marketplace strategy.

Stack

reactfastapipostgresawsopenapigraphql
dataequity.io/products/de-marketplace
DE Peppol Access Point · Data Equity
2024–25
Certified Peppol gateway for cross-border eInvoicing — single REST API across 20+ jurisdictions, validated, signed, and audit-trailed.
99.95% uptime SLA

Problem

Operating Peppol infrastructure independently means dealing with AS4 transport, per-country XML rules, SML lookups, certification, archiving, and a sprawl of jurisdictional quirks. Most ERPs, banks, and platforms shouldn't have to do that themselves.

Approach

  • Built a certified Access Point speaking AS4 over TLS 1.3, with sub-second SML lookups for participant registration.
  • Exposed a single REST API that handles UBL and PINT documents across 20+ jurisdictions (AU, NZ, SG, MY, JP, EU, UK).
  • Layered BIS 3.0 plus country-specific validation, multi-tenant RBAC, ISO 27001 controls, and tamper-evident archiving.
  • Sandbox-to-production in days, with data-residency controls per tenant.

Impact

  • 99.95% uptime SLA in production.
  • Lets ERPs, banks, and accounting platforms ship cross-border compliance without standing up their own Peppol stack.

Stack

pythonas4ublpintazureiso 27001
dataequity.io/products/de-peppol-access-point
Toolkit

What I build with.

Architecture

enterprise architecturesoamicroservicesapi-led designevent-drivenintegration patterns

AI & ML

generative airaglangchainpytorchmistralaossflaskdjango

Languages

pythonjavaspring bootjavascripttypescriptnode

Frontend

reactangular

API & integration

apigeeazure api mgmtmulesoftibm iibibm mqdatapoweraws api gatewaykafka

Cloud

awssagemakerbedrocklambdadynamodbazuregcp

Data

oraclepostgresmysqlsql servermongodbdynamodb

DevOps & tooling

dockerkubernetesterraformaws cdkjenkinsgithub actionsjira

Domains

energy & utilitiessmart meteringscadaerppeppol / einvoicingopen banking