Custom Software Development in SoMa San Francisco
SoMa is the densest stretch of venture-backed software in the world. The grid running from Folsom and Howard south through South Park, Brannan, and into Mission Bay concentrates the global headquarters of cloud platforms, payment infrastructure operators, and the post-2022 wave of AI-native SaaS that defines the current cycle. The software demand follows the venture money: AI infrastructure, model orchestration, Stripe metered billing for inference-priced products, and SOC 2 pen tests that survive enterprise diligence.
Why SoMa businesses partner with QUANT LAB
SoMa software buyers move at venture pace. Seed-to-Series-C SaaS teams and AI-native firms need senior engineering accountable to the contract, security posture that survives Series A or B diligence, and a fixed-quote model that does not balloon mid-engagement. QUANT LAB runs founder-led delivery. William Beltz scopes, builds, and ships every project personally. No offshore handoff, no junior outsourcing, no agency markup. The model travels across time zones — Pacific Time engagements run with adjusted hours so SoMa syncs land in the late morning or early afternoon Pacific.
The SoMa buyer profile rewards depth in modern web and AI infrastructure. Stripe metered billing for inference-priced products, OAuth/SSO and webhook fan-out for API platforms, model orchestration and eval pipelines for AI-native SaaS, and SOC 2 CC-mapped pen tests for enterprise procurement — these are the primitives our SoMa engagements lean on. Most close on fixed-scope, fixed-price proposals with weekly Friday demos and a written acceptance milestone.
What we build for SoMa clients
SaaS MVPs for Venture-Backed Teams
Multi-tenant SaaS, Stripe metered billing, dashboarding, and admin tooling — ship-ready for seed and Series A pitches in the SoMa corridor.
AI Infrastructure & ML-Adjacent Tooling
Model orchestration, eval pipelines, prompt management, and audit logging for AI-native SaaS firms operating between Folsom and the Embarcadero.
Penetration Testing for SOC 2
Pre-Type-I pen tests for SoMa SaaS and AI-native firms entering enterprise procurement cycles.
API & Webhook Infrastructure
OAuth/SSO, webhook fan-out, and public APIs for B2B SaaS shipping out of the SoMa, Mission Bay, and South Park ecosystem.
How we work with SoMa teams
We are headquartered in Macon, Georgia and run extended hours into Pacific Time for SoMa engagements. Most syncs land in the late morning or early afternoon Pacific to give both sides fresh attention. SoMa engagements are remote-first, with one on-site session per major milestone — typically at an office along Folsom, Brannan, Townsend, or near the Embarcadero. Build cycles run weekly: every Friday you get a deployed staging URL, written change notes, and the next-week plan. SoMa engagements close on fixed-scope, fixed-price proposals — no open-ended T&M billing surprises.
FAQ
Do you work with SoMa venture-backed SaaS and AI firms?
Yes. SoMa, South Park, Mission Bay, and Yerba Buena concentrate one of the densest seed-to-Series-C SaaS and AI-native firm pools in the world. We scope MVPs and full platform builds on fixed-quote terms.
Can you cover Pacific Time delivery from a Georgia HQ?
Yes. Our standard workday extends across Eastern and Central time with adjusted hours into Pacific Time for SoMa engagements. Most syncs land in the late morning or early afternoon Pacific to keep both sides fresh.
Can you meet at a SoMa office?
Yes — we travel into SF for major engagements. Typical meetings happen at offices along Folsom, Brannan, Townsend, or near the Embarcadero. One on-site session per major milestone is standard for larger builds.
Do you support AI-native SaaS infrastructure?
Yes. Model orchestration, eval pipelines, prompt management, audit logging, and Stripe metered billing for inference-priced products are all in scope. We do not train foundation models — we build the platforms around them.
What is the typical SoMa engagement timeline?
Most SoMa MVPs ship in 8–12 weeks against a fixed-scope quote. Full platform builds run 3–6 months and close at written acceptance — not open-ended T&M.
Do you offer ongoing maintenance after launch?
Yes — monthly retainers covering hosting, security patching, and small feature work. Or take the codebase fully in-house. No lock-in.
Related submarkets & services
San Francisco, CA (parent)
Full SF-metro coverage page.
South Lake Union Seattle
Pacific Northwest tech corridor.
Downtown Austin
Texas venture-backed SaaS.
Manhattan, NYC
Wall Street fintech and media.
SaaS Platform Development
Multi-tenant MVPs and platform builds.
API Development
OAuth, webhooks, public APIs.
Penetration Testing
Pre-SOC-2 engagements.
Stripe Integration
Metered billing for AI-native products.
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Pricing
Fixed-quote ranges by project type.
Start a Project
Scoping calls and fixed-quote proposals.