quadevs
Independent dev studio · est. 2016

Production software for healthcare, AI agents, ops teams, and any business niche that needs it.

We build the systems you cannot afford to break. HEDIS pipelines, LLM agents in production, and internal platforms that survive a Monday morning at 9:01.

01Healthcare integrations 02Production AI agents 03Internal ops platforms
prod
tail -f · 7d uptime 99.97%

Selected work

Hundreds of sites. Multiple production platforms. A featured slice.

Ten years of shipping. Most clients under NDA, so we describe the shape of the work, not the brand. The full catalog runs into hundreds across healthcare, fintech, retail, esoteric, automotive, hospitality, AI tooling, and operational platforms. Names on request after a call.

CASE 01 / Healthcare · web

Multi-clinic web platform

Multi-tenant website framework for healthcare clinics. Appointment widgets, doctor profiles, secure intake forms, multilingual content, ADA-compliant components. Each clinic gets its own subdomain and branded theme on a shared headless codebase. No off-the-shelf CMS, no plugin sprawl.

Next.js · headless · Twilio · ADA View case
CASE 02 / Healthcare · interop

FHIR · TEFCA · USCDI integration

FHIR R4 ingestion and emission against EHR partners. SMART-on-FHIR auth, USCDI v3 data classes, TEFCA QHIN handshake, info-blocking-compliant access logs, consent scoping baked into the audit trail.

FHIR R4 · SMART · OAuth2 · TEFCA View case
CASE 03 / Healthcare · pipeline

HEDIS measurement pipeline

Many Windows background services managing the document and claim flow that produces HEDIS measurements. Fax gateway intake, insurance portal sync, document classification and routing, normalization, retry queues, stuck-order diagnostics, and a monitoring dashboard with Slack-native incident routing. Long-running, audit-grade, sits at the core of the operator data pipeline.

.NET · MSSQL · NewRelic · HEDIS View case
CASE 04 / Healthcare · agents

Clinical document watcher

File-system monitoring agents at provider endpoints across many sites, sister system to the document pipeline above. Picks up signed documents, classifies, OCRs, pushes to a central store with chain-of-custody logging. Runs unattended, self-heals, ships its own diagnostics.

.NET · OCR · S3 · audit log View case
CASE 05 / AI agents

Tool-use agent · production

Production LLM agent with prompt caching, tool routing, structured output, per-tenant billing meters, and a reviewer loop that catches bad calls before they ship. Vendor-agnostic abstraction over multiple model providers.

LLM · TypeScript · Postgres View case
CASE 06 / AI · pipeline

Image classify and OCR pipeline

High-volume image ingestion, normalization, and classification. Variable-batch worker pool, GPU-aware scheduling, OCR fallback, structured extraction routed downstream to a clinical data sink. Survives bursty load without losing a frame.

Python · GPU workers · S3 View case
CASE 07 / Ops platform

Trading operations terminal

Internal automation orchestrating dozens of bots across dozens of servers. Strategy DSL, parameter validation, pattern-to-strategy mapping, live PnL telemetry, on-call paging. Ships to production every single day. Monthly turnover in the millions, ops team of one.

Python · WebSocket · Redis · Telegram View case
CASE 08 / Growth · SEO

Healthcare SEO program

Technical SEO for clinical sites. Schema markup (MedicalClinic, Physician, Service, MedicalProcedure), Core Web Vitals optimization, JSON-LD for providers and locations, multilingual hreflang, content velocity playbook, GSC instrumentation.

Next.js · schema.org · GSC · Ahrefs View case
CASE 09 / Growth · SMM

Social production pipeline

Content production stack for healthcare and personal brands. Automated cross-posting, brand-safe templates, scheduling across platforms, AI-assisted captioning and reformatting, engagement instrumentation. One creator, many channels, no copy-paste.

Buffer API · OpenGraph · LLM View case
CASE 10 / Esoteric · community

Spiritism community platform

Membership platform for a spiritism community. Live sessions, recorded archives, member directory, paid subscriptions, ritual scheduling, region-aware content. Built for moderation at scale and a respectful UX in a sensitive vertical that most agencies will not touch.

Next.js · Stripe · Supabase View case
CASE 11 / Automotive · marketplace

Pre-owned car marketplace

Two-sided marketplace for pre-owned cars. VIN decoding, dealership onboarding, condition reports, financing match, escrow flow, fraud signals. Buyer-side search tuned for category-specific intent, seller-side dashboards for inventory turn.

Next.js · Postgres · ElasticSearch View case
CASE 12 / Healthcare · imaging

Scan and fax image enhancement

Server-side enhancement pipeline for medical scans and inbound faxes. Deskew, denoise, contrast normalization, OCR-readability scoring, automatic re-processing on poor inputs. Recovers documents that the scanner or the fax line corrupted, before they hit the clinical record.

.NET · OCR · imaging · ML View case
CASE 13 / Healthcare · ETL

Document reformat at scale

Cross-format conversion pipeline for clinical document corpora. Single inputs running into tens of thousands of pages, transformed across PDF, TIFF, DOCX, structured XML, and clinical CDA. Memory-bounded streaming, faithful structure preservation, audit trail for every transformation step.

Python · streaming · CDA · PDF View case
CASE 14 / Healthcare · mobile

Mobile medication selector

Patient-facing iOS and Android app for guided medication selection. Indication search, contraindication and interaction checks against the patient profile, OTC versus Rx routing, pharmacy locator, secure favorites. Built for low-friction use during a real symptomatic moment, not a clinical desk.

React Native · FHIR · Mapbox View case
CASE 15 / Logistics · ops

International logistics console

Operations platform for cross-border freight forwarding. Shipment tracking across carriers and ports, customs documentation, route exceptions, broker handoffs, finance reconciliation. Built around the jargon ops teams already use, not adapted from a generic SaaS layer.

Next.js · Postgres · carrier APIs View case
CASE 16 / Web · WordPress

WordPress site fleet

Tens of WordPress builds across verticals. Realtors, doctors, politicians, retailers, B2B e-commerce. Custom themes when stock will not do, ACF and Gutenberg blocks for editors, performance and accessibility on every build. Hosting and maintenance under contract when wanted.

WordPress · ACF · Gutenberg · LiteSpeed View case
CASE 17 / E-commerce · Shopify

Shopify apps and storefronts

Custom Shopify apps for indie brands and growing retailers. Private apps for back-of-house automation, public apps with billing and OAuth, headless storefronts on Hydrogen, theme customization where it makes sense. Built so a non-technical merchant can run the day to day.

Shopify CLI · Polaris · Liquid · Hydrogen View case
CASE 18 / Mobile · iOS, Android

Native and cross-platform mobile apps

Apps across consumer, healthcare, and enterprise. Offline-first sync, push and live activity, in-app purchases, biometrics, secure storage. Shipped to App Store and Play Store with the boring parts (CI, signing, beta tracks) wired up so updates ship without drama.

React Native · Swift · Kotlin View case
CASE 19 / Energy · billing

Energy sector billing, Ukraine

Billing and account-management systems for energy distributors and retailers in Ukraine. Tariff calculation, meter intake, customer portals, multi-channel notifications, regulator-aware reporting, integration with national clearing pipelines. Built to clear audits in a regulated, scrutinized sector.

.NET · MSSQL · regulator APIs View case
CASE 20 / Healthcare · multilingual

Multilingual clinic platform

Web platform for a private multi-location medical center serving the Eastern European diaspora. Polish, Ukrainian, Russian content with i18n routing, multi-step appointment wizard wired to an external booking API, doctor profiles and specialty directories across many locations, lab partner deep links, service pages tuned per specialization. Built for patients who do not speak the local language easily.

React · Vite · Express · i18next · external booking API View case
CASE 21 / Healthcare · reporting

Automated medical reporting

Branded PDF report generator for clinical workflows. Templated layouts, dynamic charts, signature blocks, batch generation against patient cohorts, locale-aware content, integration with downstream document distribution. Replaces hand-built reports for ops teams that ran on Word and a prayer.

.NET · PDF · LeadTools · MSSQL View case
CASE 22 / Healthcare · secure delivery

HIPAA audited file proxy

Authenticated file delivery service for clinical documents. Tokenized download URLs, scope-bound access, full audit trail, virus scanning, configurable retention, integration with EHR and partner systems. Passed an external HIPAA security audit on the first review.

.NET · token auth · audit log View case
CASE 23 / Healthcare · data systems

Clinical data warehouse

Long-running clinical data system with a fleet of background services. Patient, encounter, and claim records normalized with history, ETL batches against external partners, stored procedures for analytics teams, read-only replicas for reporting. Survived years of feature work without losing referential integrity.

.NET · MSSQL · Windows services · ETL View case
CASE 24 / Healthcare · API hub

Clinical data aggregation hub

API hub aggregating multiple clinical data sources behind a single read-friendly contract. Typed C# client SDK shipped to downstream services, schema-versioned endpoints, request budgeting, request-level audit. Lets internal teams move fast without touching a dozen origin systems each.

.NET · ASP.NET Core · typed SDK View case
CASE 25 / Education · accounting

Online accounting school

Online learning platform for accounting professionals. Course catalogs by topic, recorded video lessons, quizzes and graded assignments, certificate issuance, student progress tracking, payment and subscription billing, instructor admin. Multi-language content for cross-border students.

Node · Express · video CDN · Stripe View case
CASE 26 / Gaming · legacy

Online casino platform

Early-career project from years back. Game lobby, account management, deposit and withdrawal flows, RNG fairness logging, KYC, responsible gaming controls, multi-currency wallet, regulator-aware audit trail. Left in the portfolio because the engineering bar was high and the lessons stuck.

classic web · KYC · payments · audit View case
CASE 27 / Geo · platform

Map-based geo-resume platform

Web platform for location-aware professional profiles. Candidates pin their availability radius on a map, recruiters search by region and proximity, profile visibility tied to geofences, branded micro-sites per region. Custom clustering, heatmaps, and travel-time isochrones.

Google Maps API · geocoding · clustering View case
CASE 28 / Dating · agency-led

Dating platform, agency-led

Two-sided platform where matchmaking agencies introduce women to men. Agency-side workspace for profile curation and managed introductions, member-side onboarding with verification, communication under agency moderation, video meet rooms, multilingual interface for international clientele.

web · video · payments · KYC View case
CASE 29 / Construction · multi-country

Construction company sites, multi-country

Website framework for construction firms operating across several countries. Per-region branding, project portfolios with rich media, services and capabilities pages, quote flows with lead routing to regional offices, localized content and units of measurement. Shared codebase, distinct themes per market.

headless CMS · localization · regional CDN View case
CASE 30 / E-commerce · Shopify

Artisan salt store with recipe content

Shopify storefront for a small-batch culinary salt brand with built-in author-led recipe content. Custom theme tying recipes to ingredient products, structured Recipe schema for rich snippets, content-led SEO, subscription-style flavor drops, and a clean editorial admin so the founder writes recipes and ships orders without an agency in the loop.

Shopify · Liquid · Recipe schema View case
CASE 31 / Emerging tech · brand site

Brand site for a pioneering AR and VR studio

Public brand site for one of the longest-running AR and VR development studios in the United States. Showcase of immersive case work, interactive 3D and WebGL teasers without taxing the page, careful performance budget so a content-rich site loads on a weak conference Wi-Fi, structured pages for client industries and partnerships.

WordPress · WebGL · video CDN View case
CASE 32 / Real-time · video

One-on-one video chat

Peer-to-peer video calling with WebRTC. STUN and TURN fallback, encrypted media, recording with consent, virtual backgrounds, branded UI. Used in healthcare consultations, support workflows, and creator-fan platforms where call quality and reliability are not optional.

WebRTC · STUN/TURN · TypeScript · Node View case
CASE 33 / Real-time · streaming

Live video streaming, one-to-many

One-to-many live broadcast with low-latency delivery. HLS plus WebRTC adaptive bitrate, viewer-side captions, chat sidecar, recorded VOD, DRM-aware paywall hooks, scalable origin behind a CDN. For events, courses, and creator broadcasts that cannot drop frames.

WebRTC · HLS · CDN · FFmpeg View case
CASE 34 / Real-time · messaging

Real-time text messaging

In-app text chat with presence, typing indicators, read receipts, threading, reactions, attachments. Built for healthcare member portals, support inboxes, and community platforms. End-to-end encryption optional, audit logs ship by default.

WebSocket · Postgres · Redis pub/sub View case

More work across other niches we did not put on the homepage. Pharma, hospitality, fintech, retail, esoteric, education, automotive, B2B SaaS, internal tooling. 10 years. Hundreds of sites. Most under NDA.

Want to see the long form? Get in touch
Studio startups our own product bets
STARTUP 01 / Auto · vertical SaaS
Studio startup

Operating system for service stations

Vertical SaaS for car service shops. Bay scheduling, parts inventory, supplier integrations, customer portal, retention loops, parts-margin analytics. Built around the actual workflow of a busy garage, not adapted from generic CRM.

Auto vertical SaaS
Next.js · Postgres · Stripe Read thesis
STARTUP 02 / Vertical fintech
Studio startup

Funding marketplace, beauty vertical

Vertical financing marketplace for beauty pros. Solo creators, salon owners, indie brands. Working capital, equipment leasing, growth loans matched to revenue. Underwriting tuned to category-specific cashflow patterns nobody else models.

Beauty vertical fintech
Next.js · Plaid · Stripe Capital Read thesis
STARTUP 03 / Creator commerce
Studio startup

Personal brand commerce

All-in-one stack for solo creators with strong personal brands. Content engine, product drops, community gating, lightweight analytics. Built by a creator, for creators. Fewer moving parts than a Shopify plus Substack plus Discord stitch-up.

Creator commerce stack
Next.js · Stripe · Supabase Read thesis

Real artifact

A typed conversion event we wire into every client site.

No abstractions, no diagram. The shape of code we wire into client sites so revenue and conversions actually get counted, attributed, and optimised.

Strict types, consent-aware, PII-stripped before transport, and audit-logged. Same shape used across healthcare, e-commerce, B2B SaaS, and AI-agent products. Drop it in, hook it to your warehouse, watch the numbers.

How we engage

From first call to a system you can audit.

STEP 01

Scoped review

Two-week paid discovery. We map the system, the constraints, and the failure modes. You get a written technical plan.

STEP 02

Build with feedback

Weekly demos, working software each cycle. We ship to a staging environment that mirrors your prod, not a sandbox.

STEP 03

Production cutover

Telemetry, runbooks, and on-call coverage during the switch. We do not call something done until it has survived a week of real load.

STEP 04

Ongoing ownership

Retainer or handover, your call. If we hand off, your team gets the runbook, the dashboards, and a recorded walkthrough.

Start a project

Tell us what you are trying to ship.

Healthcare integration, an LLM agent that has to actually work, or an internal platform someone forgot to maintain. We respond within one business day.

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Budget (USD)

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Stack · manifest

Technologies we ship to production

stack.manifest read-only · 32 + many
Next.js primary
React primary
TypeScript primary
Node.js primary
Python primary
.NET primary
PHP site
PostgreSQL database
Microsoft SQL Server enterprise
Redis caching
Elasticsearch search
Stripe payments
Shopify commerce
WordPress cms
Twilio comms
Amazon Web Services cloud
New Relic observability
Swift mobile
Kotlin mobile
GitHub ops
Express backend
Vite tooling
Mapbox geo
Cloudflare cdn
Docker devops
Nginx web server
Sentry errors
WebRTC real-time
Three.js webgl
Tailwind CSS styles
Supabase baas
GraphQL api
and many more on request
~ tail stack.manifest

Plus FHIR R4, SMART-on-FHIR, HL7, OAuth2, WebSocket, GPU workers, OpenCV, LeadTools, and whatever else your stack runs on. Tell us what you run.