What We Build

Full Stack → Tested → Handed Off. Production-grade software in weeks, not quarters.

ENGINEERING

Full-Stack SaaS Development

Python/FastAPI backend, Next.js/TypeScript frontend, PostgreSQL with Alembic migrations. We build the entire stack — auth, storage, API, and dashboard — with 80%+ test coverage and documentation your team can maintain.

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COMPLIANCE

Compliance & Workflow Engineering

For PropTech, LegalTech, and FinTech products where audit trails, role-gated actions, PDF certificate generation, and reversible workflows are not optional. We design the compliance layer from day one.

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BILLING

Payment & Billing Systems

Stripe checkout sessions, idempotent webhook processing, credit ledgers, organization wallets, and promo codes — wired correctly so edge cases do not become billing incidents at 2am.

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AI

AI Feature Integration

Async AI generation pipelines built on domain events, not inline API calls. Content orchestration services, versioned prompt registries, and feature flags for safe rollouts. AI failures never break your core product.

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ARCHITECTURE

Product Architecture & Design

Database schema, service boundaries, API contracts, feature flags, and a written SSOT document — all designed before line one of code. Clients who engage us for architecture avoid the refactors that cost 3x later.

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ba(18,28,40,.55); --cta-bg:rgba(255,255,255,.07); --cta-hover:rgba(255,255,255,.12); --seafoam:#86E7CF; --salmon:#FF7A6E; --radius:22px; --blur:16px; --shadow:0 12px 44px rgba(0,0,0,.40); --pad:clamp(18px,3.6vw,30px); --max:1280px; --top:clamp(28px,5vh,72px); --bottom:clamp(36px,8vh,92px); /* layout hardening */ position:relative !important; display:block !important; float:none !important; clear:both !important; margin:0 !important; padding:var(--top) var(--pad) var(--bottom) !important; background:var(--bg) !important; color:var(--fg) !important; isolation:isolate; scroll-margin-top:84px; z-index:auto !important; visibility:visible !important; opacity:1 !important; } /* container */ #sto-part-04 .max{width:100%; max-width:var(--max); margin:0 auto} /* section head */ #services-title{ margin:0 0 8px; font-weight:900; letter-spacing:-.01em; font-size:clamp(22px,3.6vw,34px); line-height:1.14; text-shadow:0 1px 0 rgba(0,0,0,.22); } #sto-part-04 .sx-lead{ margin:0 0 clamp(12px,2vw,16px); color:var(--muted); font-size:clamp(14.5px,1.6vw,17px); line-height:1.65 } /* glass panel wrapper */ #sto-part-04 .sx-panel{ position:relative; border-radius:var(--radius); overflow:hidden; background:var(--panel); box-shadow:var(--shadow); padding:clamp(22px,3.2vw,32px); } #sto-part-04 .sx-panel::before{ content:""; position:absolute; inset:-20% -10% auto -10%; height:70%; background: radial-gradient(900px 400px at 10% 0%, rgba(134,231,207,.18), transparent 60%), radial-gradient(700px 300px at 95% 5%, rgba(255,122,110,.10), transparent 60%); mix-blend-mode:screen; pointer-events:none; } /* grid */ #sto-part-04 .sx-grid{ display:grid; gap:clamp(14px,2vw,20px); grid-template-columns:repeat(12,minmax(0,1fr)); align-items:start; } #sto-part-04 .sx-col{grid-column:span 4} @media (max-width:980px){ #sto-part-04 .sx-col{grid-column:span 6} } @media (max-width:640px){ #sto-part-04 .sx-col{grid-column:span 12} } /* card (clean glass; no particles) */ #sto-part-04 .sx-card{ position:relative; overflow:hidden; contain:layout paint style; border-radius:calc(var(--radius) - 6px); background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,0)), var(--glass); border:1px solid var(--ring); backdrop-filter:blur(var(--blur)); -webkit-backdrop-filter:blur(var(--blur)); box-shadow:inset 0 1px 0 rgba(255,255,255,.06); padding:18px 18px 16px 22px; min-height:220px; transition:transform .18s ease, border-color .18s ease, background .18s ease; } #sto-part-04 .sx-card:hover{ transform:translateY(-2px); border-color:rgba(255,255,255,.22) } #sto-part-04 .sx-card::before{ content:""; position:absolute; inset:0 auto 0 0; width:2.5px; z-index:1; background:linear-gradient(180deg,rgba(134,231,207,.45),rgba(134,231,207,.15)); border-radius:calc(var(--radius) - 6px) 0 0 calc(var(--radius) - 6px); } #sto-part-04 .sx-card > *{ position:relative; z-index:2 } /* chip + titles */ #sto-part-04 .sx-chip{ display:inline-flex; align-items:center; gap:8px; padding:6px 10px; margin-bottom:8px; border-radius:999px; font:700 12px/1 Inter,system-ui; letter-spacing:.08em; text-transform:uppercase; background:rgba(255,255,255,.09); border:1px solid rgba(255,255,255,.22); color:#e6edf6; } #sto-part-04 .sx-card h3{margin:4px 0 4px; font:800 clamp(18px,2.2vw,22px)/1.25 Inter,system-ui; letter-spacing:-.01em} #sto-part-04 .sx-card p{margin:0; color:var(--muted); font-size:14.5px; line-height:1.65} /* CTA row + buttons (hover-only; no after-click color) */ #sto-part-04 .sx-actions{margin-top:12px; display:flex; gap:10px; align-items:center} #sto-part-04 .sx-btn{ position:relative; overflow:hidden; display:inline-flex; align-items:center; gap:10px; padding:10px 14px; border-radius:999px; border:1px solid var(--ring); background:var(--cta-bg); color:var(--fg); box-shadow:inset 0 1px 0 rgba(255,255,255,.06); transition:transform .15s ease, background .2s ease, border-color .2s ease; -webkit-tap-highlight-color:transparent; text-decoration:none; } #sto-part-04 .sx-btn:link, #sto-part-04 .sx-btn:visited{ color:var(--fg) !important; background:var(--cta-bg) !important; border-color:var(--ring) !important; text-decoration:none !important; } #sto-part-04 .sx-btn:hover{ transform:translateY(-2px); background:var(--cta-hover) !important; border-color:rgba(255,255,255,.22) !important; color:var(--fg) !important; } #sto-part-04 .sx-btn:active{ background:var(--cta-hover) !important; color:var(--fg) !important } #sto-part-04 .sx-btn:focus{ outline:none } #sto-part-04 .sx-btn:focus-visible{ outline:2px solid #e9f1fb; outline-offset:2px; box-shadow:none } /* mobile niceties */ @media (max-width:640px){ #sto-part-04 .sx-panel{ padding: max(16px, env(safe-area-inset-top)) var(--pad) max(18px, env(safe-area-inset-bottom)) var(--pad) } #sto-part-04 .sx-btn{ min-height:44px; padding:12px 16px; font-weight:700 } } @media (prefers-reduced-motion:reduce){ #sto-part-04 .sx-card, #sto-part-04 .sx-btn{ transition:none !important } }

What We Build

What We Build → Full Stack → Handed Off. Production-grade software in weeks, not quarters.

ENGINEERING

Full-Stack SaaS Development

Python/FastAPI backend, Next.js/TypeScript frontend, PostgreSQL with Alembic migrations. We build the entire stack — auth, storage, API, and dashboard — with 80%+ test coverage and documentation your team can maintain.

Start a Project →
COMPLIANCE

Compliance & Workflow Engineering

For PropTech, LegalTech, and FinTech products where audit trails, role-gated actions, PDF certificate generation, and reversible workflows are not optional. We design the compliance layer from day one.

Start a Project →
BILLING

Payment & Billing Systems

Stripe checkout sessions, idempotent webhook processing, credit ledgers, organization wallets, and promo codes — wired correctly so edge cases do not become billing incidents at 2am.

Start a Project →
AI

AI Feature Integration

Async AI generation pipelines built on domain events, not inline API calls. Content orchestration services, versioned prompt registries, and feature flags for safe rollouts. AI failures never break your core product.

Start a Project →
Enablement

Product Architecture & Design

Playbooks, QA loops, and ownership transfer so your team can run it without us.

Start a Project →
SEATECHONE
PRODUCT STUDIO · SEATTLE

We Build B2B SaaS Products. End to End.

From database schema to payment integration to AI pipeline — SeaTechOne ships production-grade software for founders and operators who need a technical partner, not another consultant.

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What We Built: SEAREI

A real product. In production. Built end to end.

SEAREI

Virtual Staging Platform

Multi-tenant SaaS for real estate agents. Stripe billing, AI staging pipeline, MLS compliance certificate generation, and role-gated publication workflows — built from scratch.

Architecture
Build
Production
View Searei.com →
Tech StackFastAPI · Next.js · PostgreSQL
Test Coverage80%+
SEAREI

Multi-tenant SaaS · Stripe · AI Pipeline

Organizations, members, and role-gated actions. Stripe checkout sessions, credit ledgers, and idempotent webhook processing. Async AI staging pipeline that never blocks a request handler.

Architecture
Build
Production
View Searei.com →
User RolesAdmin · Agent · Client
Compliance LayerMLS Cert
SEAREI

Compliance Certificate Generation

Full audit trail on every staging job. PDF compliance certificates generated on approval. Reversible publication workflow with role-gated sign-off — designed for MLS submission requirements.

Architecture
Build
Production
View Searei.com →
Audit TrailFull
PDF CertsAuto-gen

Insights

Short, clear write-ups from real projects — what worked, what didn't, and why.

ArchitectureSaaSAug 2025 · 6 min

How We Architected SEAREI: Multi-Tenant SaaS From Zero

Schema design, multi-tenant org model, Stripe integration, async AI pipeline, and MLS compliance layer — how we built SEAREI from zero to production.

BackendAI PipelineAug 2025 · 7 min

Why AI Generation Should Never Run in a Request Handler

Async AI jobs inside a synchronous request cycle — how we structured staging generation so it never blocks the user or the server.

DatabaseComplianceJul 2025 · 8 min

Compliance-First Database Design: What PropTech Taught Us

Audit trails, reversible migrations, role-gated publication, and MLS certificate generation — the database decisions that make compliance products maintainable, not nightmares.

Frequently Asked Questions
Ten clear answers. Tap to expand.
10
10 shown
What does a typical engagement look like?

We work in fixed-scope phases. Each phase has a written spec, defined deliverables, and a clear budget before we write a line of code. No open-ended retainers with unclear output.

  • Phase 1 — Architecture: data model, service boundaries, API contracts, feature flags, written SSOT doc.
  • Phase 2 — Build: backend, frontend, auth, payments, core workflows. Tested and deployed.
  • Phase 3 — Production: compliance layer, AI pipeline, performance hardening, handoff.
How long does it take to build a v1?

A shippable v1 with auth, core workflow, and payments typically takes 8 to 12 weeks. Compliance layers, multi-tenant orgs, or AI pipelines add 4 to 8 weeks. We scope this in writing before we start — no surprises mid-build.

Do you build the entire product or just features?

Both. We prefer greenfield products where we design the architecture from scratch — schema, service boundaries, API contracts, the full stack. We also take on brownfield work when the existing codebase is well-structured. We will tell you honestly if it is not.

What stack do you use?

Python + FastAPI + SQLAlchemy + Alembic on the backend. Next.js 15 + React + TypeScript on the frontend. PostgreSQL in production, Stripe for payments, S3-compatible storage. Redis for async job queues. Tools your team can maintain and extend after handoff.

Can you build compliance and regulated-industry products?

Yes. SEAREI — our own product — generates MLS compliance certificates, maintains full audit trails, and uses role-gated publication workflows. PropTech, LegalTech, FinTech, and HealthTech are where we do our best work. Compliance is designed in from day one, not bolted on later.

How do you integrate AI into a product?

Via async job queues, not inline API calls. The request handler validates input and enqueues a job — then returns immediately. A background worker calls the AI provider, writes the result, and updates job state. The UI polls a lightweight status endpoint.

This means AI generation failures never block your users, never tie up server workers, and are always retryable. The same pattern handles any slow, compute-heavy task — PDF generation, batch processing, report rendering.

What does handoff look like?

All source code in a private repo you own. Written architecture documentation covering schema, service boundaries, API contracts, and feature flags. Test suite with 80%+ coverage. Reversible Alembic migrations. Deployment runbook. Incident runbook. 30-day support window after launch.

You should be able to hire any competent engineer and have them productive in the codebase within a day. That is our standard.

Who owns the IP?

You do. Everything we build for your engagement — code, architecture docs, design assets — transfers to you on final payment. We retain no license to your product or its codebase.

How is pricing structured?

Fixed-scope phases with a written spec and clear deliverables for each. No hourly billing. You know exactly what you are getting and what it costs before we start. Phase budgets typically range from $15,000 to $45,000 depending on scope and complexity.

Do you offer ongoing maintenance after launch?

Yes. Monthly retainer engagements are available after the build. Retainers cover new feature phases, dependency upgrades, incident response, and architecture reviews. Most clients stay on retainer after launch.

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Let's build your product.

Tell us what you're building, where you are in the process, and what's blocking you. We respond within one business day with a clear next step — usually a 45-minute architecture conversation.

SaaS ProductCompliance WorkflowAI IntegrationArchitecture Review
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