Skip to content
    EVC Studios

    Proof-first engineering

    Verified architecture decisions from systems EVC Studios designed and built.

    HerpSync and MapProx demonstrate hands-on decisions about multi-tenant boundaries, edge routing, provider costs, concurrency, and operational recovery. The broader engagement patterns remain explicitly representative and do not claim client outcomes.

    Discuss a similar system

    Verified EVC experience

    Technical credibility through inspectable system boundaries

    These panels connect the business requirement to the implemented architecture, delivery tradeoffs, and operating consequences. They avoid vague testimonials, fabricated results, and unsupported performance claims.

    HerpSync

    Soft launch

    Routing HerpSync Custom Domains Without Querying the Database

    EVC Studios designed and built HerpSync end to end.

    HerpSync is a multi-tenant SaaS product for animal breeders. It serves public tenant pages through platform subdomains and customer-controlled domains, so the incoming host must resolve to the correct tenant before the application handles the page request.

    Verified system boundary

    The architecture keeps domain ownership and activation state in the application database, then synchronizes only the routing key and tenant slug into an edge-readable configuration projection. Request routing reads the projection; application workflows and domain management continue to use authoritative database state.

    1. 01

      Normalize host

      Remove routing-irrelevant variation and distinguish platform hosts from custom hosts.

    2. 02

      Read projection

      Resolve a custom host to the minimum tenant-routing identifier at the edge.

    3. 03

      Rewrite request

      Send the request to the tenant-aware public route without querying the primary database.

    4. 04

      Reconcile state

      Synchronize approved domain changes and periodically repair projection drift.

    Read the implementation lesson

    MapProx

    Publicly available

    Designing MapProx Quotas Around Resources and Paid API Operations

    EVC Studios designed and built MapProx end to end.

    MapProx is a field-sales mapping, route-planning, and visit-logging SaaS product. It manages persistent resources such as maps and business locations while also performing metered operations such as route optimization, discovery, and geocoding.

    Verified system boundary

    The quota model treats current resources as stock measured through live counts and accumulated operations as flow measured through period counters. Provider-facing workflows check eligibility before avoidable paid work, then use an atomic reservation or consumption gate at the event the product defines as billable or complete.

    1. 01

      Classify the limit

      Decide whether the rule constrains current inventory, provider invocation, a completed operation, or a saved result.

    2. 02

      Check preliminary eligibility

      Check available allowance before avoidable paid work, while recognizing that this check alone does not reserve capacity.

    3. 03

      Reserve or perform

      Reserve atomically before the provider call when invocation itself consumes quota. Otherwise perform the provider operation under the documented completion policy.

    4. 04

      Consume, save, or compensate

      Atomically consume or confirm usage at the defined completion event, persist the useful result, and compensate a prior reservation if downstream work fails.

    Read the implementation lesson

    Representative engagements

    What these systems typically require

    The examples below are planning patterns, not completed-client claims or measured outcomes.

    Representative

    Multi-tenant operations portal

    Problem and proposed system

    Fragmented customer operations across spreadsheets and email. A tenant-isolated portal with role-based workflows, documents, status tracking, reporting, and controlled administration.

    Likely architecture

    React, Node.js REST API, PostgreSQL, RBAC, object storage, notifications. Scope changes with roles, migration, integration quality, and security requirements.

    Representative

    Internal workflow dashboard

    Problem and proposed system

    Teams re-enter data and cannot see process bottlenecks. A shared operational workspace with assignments, approvals, exceptions, audit history, and reporting.

    Likely architecture

    Typed UI, relational workflow model, scheduled jobs, CRM synchronization. Scope changes with roles, migration, integration quality, and security requirements.

    Representative

    SaaS subscription platform

    Problem and proposed system

    A product concept needs a maintainable first commercial release. A focused multi-tenant platform with onboarding, subscriptions, core workflow, administration, and essential analytics.

    Likely architecture

    React, PostgreSQL, JWT, Stripe, webhooks, deployment pipeline. Scope changes with roles, migration, integration quality, and security requirements.

    Representative

    Corporate lead-generation website

    Problem and proposed system

    Complex services are difficult for buyers and search systems to understand. A structured content platform with conversion paths, CMS governance, analytics, CRM routing, SEO, and GEO foundations.

    Likely architecture

    Vite or SSR where required, CMS, structured data, analytics events. Scope changes with roles, migration, integration quality, and security requirements.

    Representative

    CRM and payment integration layer

    Problem and proposed system

    Customer and payment records diverge across systems. A controlled synchronization service with canonical identifiers, idempotent webhooks, reconciliation, retries, and admin visibility.

    Likely architecture

    REST APIs, queues or scheduled processing, Stripe, CRM API, audit logs. Scope changes with roles, migration, integration quality, and security requirements.