About

A studio that builds the system and leaves the decision trail.

Doric Stack is a product and consulting studio for payments architecture, applied AI, commerce decisions, SaaS foundations, and technical writing. The public surface starts with released software, open-source tooling, and written reviews that show the reasoning behind the recommendation.

Architecture

The five-layer architecture.

The studio is named after the Doric order, the oldest and strongest of the classical architectural styles. In software, this translates to a five-layer stack that prioritizes strength over ornament.

  • 05 Insights Field Notes turn decisions into essays, diagrams, and source trails.
  • 04 Strategy Advisory converts ambiguous architecture questions into written decision artifacts.
  • 03 Products Released software makes the operating judgment inspectable.
  • 02 Platform Commerce, licensing, deployment, and observability stay owned by the studio.
  • 01 Foundation Typed systems, tests, release discipline, and durable records carry the load.
Doric Stack 5-layer architecture
Full foundation model

Foundation model

Foundation model

Doric Stack 5-layer architecture

Credibility

Payments depth, AI build work, and product proof in one studio.

Doric Stack is an enterprise-grade technical studio. The public surface stays inspectable: released apps, public tools, written reasoning, and scoped deliverables.

Founder, builder, payments architect

Navin Agrawal

Doric Stack is run by a builder who turns product, payments, AI, and integration decisions into public software, Field Notes, and scoped review artifacts.

  • Payments architecture across merchant models, settlement, reconciliation, disputes, and operating risk.
  • Applied AI systems work across LLM apps, MCP tooling, provider boundaries, evaluation, and fallback behavior.
  • Product proof through released software, public tools, and written decision trails.

Production paths

Payment, treasury, and enterprise system work.

Multi-rail systems

RTP, FedNow, ACH, wire, SWIFT, card, and settlement patterns.

Applied AI tooling

Agentic commerce, multi-agent orchestration, model fine-tuning, and runtime governance.

Proof

Proof requires public inspectability.

01

Payment systems

Architecture judgment across merchant models, onboarding, settlement, reconciliation, disputes, fraud controls, and operating failure modes.

02

Enterprise delivery

Experience turning large modernization programs into decision artifacts, implementation paths, and operating checkpoints.

03

Applied AI

Hands-on work across agentic commerce, multi-agent orchestration, fine-tuning, provider boundaries, evaluation plans, and fallback behavior.

04

Public proof

The site leads with work people can inspect: a live App Store product, a public MCP tool, and articles that explain the tradeoffs.

Method

A simple operating model.

01

Name the decision

Start with the thing that must be decided, the constraints around it, and the failure modes that matter.

02

Build the smallest useful system

Prefer concrete working surfaces over speculative architecture. Add runtime only when the product has earned it.

03

Leave the reasoning behind

Products, docs, and consulting notes should explain the path clearly enough for the next decision to be easier.

Current focus

Public surfaces stay narrow.

Released work

Public software, open repositories, and product pages carry concrete evidence.

Written judgment

Field Notes and source notes explain the tradeoffs behind the work.

Advisory

Focused reviews for payments, AI systems, SaaS architecture, and integration decisions.

Operating platform

Sales, licensing, releases, and diagnostics stay close to the builder.

Contact

Bring the decision or product question.

Use contact for product questions, consulting intake, support, security reports, and focused follow-up on Doric Stack work.

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