Python Development Services

A freelance developer delivers code; ABM Tech delivers a system. That means architecture oversight, code review on every pull request, a CI pipeline that enforces quality gates, and accountability for the entire codebase — not just the feature a single engineer was assigned. We also provide continuity: if an engineer rotates off your account, we maintain context and can onboard a replacement in days rather than weeks because the codebase is documented and structured for transferability.

We use pytest as the standard test runner, with factories (factory_boy or pytest fixtures) for test data, httpx for async API testing, and coverage thresholds enforced in CI. For new projects we target 80%+ coverage on business logic with explicit carve-outs for infrastructure glue code. For legacy codebases we establish a baseline on day one and require coverage to never regress — incremental improvement rather than a risky big-bang test-writing sprint.

Yes, and we have a structured intake process for it. We start with a codebase audit: dependency health, test coverage, known vulnerabilities (via pip-audit and Bandit), architectural patterns, and any documented technical debt. We deliver a written assessment within one week, then we agree on a stabilization plan before adding any features. Clients often tell us this audit alone saves them from months of compounding problems.

Django is the right choice when you need a full-featured framework with a built-in ORM, admin interface, authentication system, and a large ecosystem of Django-specific packages — typical for content platforms, internal tools, and applications with a lot of database-driven pages. FastAPI excels when you need high-throughput async request handling, automatic OpenAPI documentation, and a leaner footprint — typical for API-only backends, microservices, and ML inference endpoints. We can walk through your specific requirements on a scoping call and make a recommendation with reasoning.

We use Poetry or pip-tools to produce lock files that pin every direct and transitive dependency to an exact version. Dependabot or Renovate runs weekly dependency update PRs automatically, each of which must pass CI before it can be merged. We document any dependencies with known security histories or unusual licensing so there are no surprises during your next compliance audit. For projects on older dependency stacks, we schedule a quarterly migration sprint to stay current.