Evolvera
Backend API

Communication Platform API.

Rebuilt from the ground up with 95% test coverage

95%
Test Coverage
PythonDjangoDRFCeleryDockerUnit Testing
Challenge

A communications company was losing enterprise deals because prospects asked two questions in every security review — 'what's your test coverage?' and 'how do you deploy?' — and the honest answers were '12%' and 'we SSH in'. The existing API had no versioning, poor documentation, and deployments that took down production on a monthly cadence. Their sales cycle had slowed to a crawl.

Solution

We rebuilt the API from scratch with Django REST Framework, locking down clean endpoint design with explicit versioning (v1 lives forever, v2 breaks changes), pagination on every list endpoint, and rate limiting enforced at the framework level. We wrote tests as we built — unit, integration, and contract — reaching 95% coverage with 800+ test cases before any endpoint went to production. CI/CD runs on GitHub Actions: every PR runs lint, tests, security scans, and a type check. Deployment is automated, staged, and rolls back automatically if the error rate spikes post-deploy.

Results

Outcomes that mattered.

01

95% test coverage across 800+ automated tests (unit, integration, contract)

02

Zero production outages in the 12 months since the rebuild went live

03

API p95 response time of 45ms under peak load; 99.99% success rate

04

Enterprise sales cycle shortened by 6 weeks once 'test coverage' stopped being a red flag

Under the hood

Technology decisions.

DRF over FastAPI because the team inherited Django elsewhere in the stack and we valued single-framework ops over the marginal speed win. Versioning is done at the URL level (not header-based) because URL versioning is easier to debug when customers call your support team. CI/CD enforces coverage as a merge gate: any PR that drops coverage below 90% is blocked, which keeps the team honest without requiring constant human review.

Get in touch

Let's build
something
together.

Have an idea? Need a development partner? Tell us what you're working on and we'll get back to you within 24 hours with an honest assessment — no sales pitch, no obligation.

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Prefer to talk?
We reply within 24 hours. NDAs signed on request.