Custom Software Development

Make your stack talk.

Connect the tools you already use. We design and build REST, GraphQL, and event driven APIs and integrations that turn disconnected systems into one.

200+ Integrations shipped
<100ms API latency goals
100% Documented

Integration done
the right way.

APIs are the contracts your business runs on. We build them to be reliable, secure, and a pleasure to consume.

REST & GraphQL APIs

Cleanly designed, versioned APIs with consistent schemas, pagination, and error handling that developers actually enjoy using.

Third Party Integrations

Salesforce, HubSpot, Stripe, QuickBooks, SAP, Shopify, and hundreds more, connected and kept in sync.

Event Driven Architecture

Webhooks, queues, and streaming with Kafka or SQS so systems react in real time instead of polling.

Auth & Security

OAuth2, API keys, rate limiting, and signed webhooks, built so your APIs are safe to expose.

Data Sync & ETL

Reliable two way sync, deduplication, and transformation pipelines that keep data consistent across systems.

Developer Experience

OpenAPI docs, SDKs, sandboxes, and clear changelogs so internal and partner teams integrate fast.

From spec to live integration.

A disciplined approach to connecting systems, with contracts and tests so integrations do not break silently.

01

Map the Systems

We document every system, data flow, and edge case, then define the API contracts and sync rules up front.

02

Design the Contract

We design schemas, auth, and error handling as an OpenAPI or GraphQL spec your team reviews before a line is written.

03

Build & Test

We implement with automated contract tests, retries, and idempotency so integrations are resilient by default.

04

Monitor & Maintain

Live dashboards, alerting on failures, and versioning so changes roll out without breaking consumers.

Systems already
in sync.

Bezninja, Business Services Case Study
Bloomlink, Telecom & Call Centers Case Study
Education & Digital Learning Case Study
Oracle Merchant Services, Financial Services Case Study

Questions about
API Development & Integrations

Often, yes, through partner APIs, file based exchange, screen level automation, or database level integration. We assess the options and recommend the most reliable one.

It depends on your consumers. GraphQL shines for flexible, client driven data needs; REST is simpler and cacheable for well defined resources. We often use both and recommend based on your case.

Event driven sync with webhooks and queues, plus reconciliation jobs that catch drift. We design for idempotency and retries so a hiccup never corrupts your data.

Yes. OAuth2, scoped API keys, rate limiting, signed webhooks, and audit logging come standard, so you can safely open APIs to internal teams and external partners.

Always. You get OpenAPI or GraphQL schemas, hosted docs, and changelogs, so onboarding a new developer or partner takes hours, not weeks.

Ready to ship?

Stop guessing.
Start building what works.

Book a free discovery call. We'll map your needs, scope the work, and give you an honest plan, timeline, cost, and trade offs included.

info@croncore.com
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