Migrations failed silently. The test suite took 14 minutes. Senior candidates opened the repo in the interview and politely walked. The hiring pipeline dried up because the codebase did the talking.
Service Django development services · Django 5 + DRF + AWS · UK
Django development for the SaaS that needs boring. and bulletproof.
Django development services for UK SaaS, fintech, and B2B teams. We build Django 5 apps with PostgreSQL, Celery, and AWS. Production-grade: typed where it matters, tested, observable, hire-ready forever. 21 Django apps shipped since 2019, zero Friday-night outages across our 2025 deploys.
21Django apps shipped since 2019
99.99%uptime SLO held
8-14week sprint
(Why CTOs sign)
You don’t need another Django team. You need engineers who’ve shipped 21 Django apps and watched what breaks at scale.
Django development services for the SaaS that has to operate, not the demo that has to impress. We use the framework as designed, observe everything, and hand you a repo your next senior hire opens and stays.
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The CTO this page is for14-min tests · 240 queries · 8-week fix
Eleanor inherited a Django 3 monolith. Senior interviews opened it and declined.
Then DRF started timing out. One list endpoint hit the database 240 times per request, an N+1 buried across nested serialisers. Django Debug Toolbar in staging would have caught it. Nobody ran it. The CEO asked the obvious question: why does the marketplace freeze when fifty people log in at once?
We upgraded to Django 5 with proper migration management, parallelised the test suite, and added typed services around the ORM. Eight weeks. Tests run in 90 seconds. Three senior offers accepted. This page is for CTOs who recognise themselves in that paragraph.
The stack we ship every Django build on.
Django 5 plus DRF handles 99% of the behaviour we need on day one. Async views where they earn it, observability before features.
T1
What every Django build runs on
Django 5Django 5DRFDjango ChannelsPostgreSQLCelery + RedisGunicorn / Uvicornpytest-djangofactory-boymypy + django-stubsSentry + DatadogWhiteNoise + S3Mixpanel
T2
When your Django brief calls for it
reach when neededPythonJavaGoGraphQLtRPCDrizzle / Prisma
T3
The infrastructure layer
AWS-defaultAWSCloudFrontCloudflareAWS LambdaS3 + CloudFrontAWS RDS / AuroraRedisTerraformGitHub ActionsDatadog + SentryDockerKubernetes (EKS)
UK Django development studio · senior-only
Six things in-house teams and offshore shops can’t hand you
Senior Django plus DRF is rare. These are the habits that separate a Django app that operates from one that limps.
Django 5 + DRF discipline
Class-based views, model managers, signals. We use the framework as designed and don’t reinvent what Django already gives you.
N+1 prevention as a habit
select_related and prefetch_related in code review. django-silk in dev. Query log gated in CI. Zero N+1 ships to production.
Migration squash discipline
We squash and version migrations. The rollback path is tested. No migration scares the night you deploy.
Celery + Redis + signals
Long jobs out of the request cycle. Signals scoped and tested. ASGI and Channels when WebSockets earn it.
Senior-only, no juniors
The four engineers who sign your scope are the four engineers who ship. The names on the SOW are the names on the commits.
30-day walk-away both ways
You keep everything. IP assigns on every commit. No lock-in, no deposit forfeiture, no maintenance trap.
How a Django build runs
The build rhythm
Every Django app we ship moves through the same five beats. Architecture decided on day one, observability before features, a repo your next senior hire opens and stays in.
Step-01
Audit week
5 days. We map the ORM, the migration history, the query hot-spots. ADRs written, scope signed, line-item GBP.
Step-02
Model + migration plan
Squash and version migrations. The rollback path is tested. No migration scares the night you deploy.
Step-03
DRF + N+1 gate
select_related and prefetch_related in code review. django-silk in dev. Query log gated in CI before a line ships.
Step-04
Celery + observability
Long jobs out of the request cycle. Idempotent tasks, a dead-letter queue, Sentry and Datadog wired in week one.
Step-05
Load test + handover
k6 at 5× expected peak. Capacity number in the runbook. IP assigns on every commit. You keep everything.
Results
Eleanor’s Django 3 to 5 upgrade,
Eleanor’s Django 3 to 5 upgrade,
in real numbers
We upgraded a Django 3 marketplace to 5 LTS with squashed migrations, rebuilt DRF, added async views where they earned, and lifted pytest-django coverage from 12% to 71%. Fourteen weeks. Zero customer-facing downtime. P99 dropped from 1.1s to 240ms.
The upgrade
35 LTS
Django, zero downtime
14 wks
Fixed-scope sprint
Latency + coverage
1.1s240ms
P99, after rebuild
1271%
pytest-django coverage
Track record
21
Django apps since 2019
99.99%
Uptime SLO held
SERVICE
Our Django Expertise
A focused set of Django capabilities built to design, build, and scale your backend end to end.
SERVICE(01)
Django 5 + DRF APIs
Class-based views, model managers, typed serialisers. We use the framework as designed and don’t reinvent what Django gives you.
Django 5DRFSerialisersClass-based views
Django 5 + DRF APIs
SERVICE(02)
Migration management
Squash and version every migration. Reversible and tested. Test DB spins up in under 8 seconds so devs run tests again.
SquashReversiblepytest-djangoCI gate
Migration management
SERVICE(03)
Celery + async tasks
Long jobs out of the request cycle. Idempotent at the task boundary, a dead-letter queue audited, Flower for visibility.
CeleryRedisIdempotencyFlower
Celery + async tasks
SERVICE(04)
ASGI + Channels
Uvicorn plus Channels with a Redis backend. WebSocket auth wired and load-tested. Production-ready ASGI from week one.
ASGIUvicornChannelsWebSockets
ASGI + Channels
SERVICE(05)
Observability + scale
Sentry with request context, Datadog APM, slow-query alerts. On-call reads the trace and knows what happened in 60 seconds.
SentryDatadogSlow-query alertsRunbook
Observability + scale
Three ways to start. Pricing in the email back.
Pick the shape that fits and Mohit will send your real number inside 24 hours.
Django audit week
5 days, £8K fixed. We audit your existing app or a new brief: architecture, performance, scale, hire path.
- 5-day senior audit
- Render-boundary map + ADRs
- Signed scope, line-item GBP
- No commitment to build
Full Django build sprint
8 to 14 weeks of fixed-scope shipping. Django 5 + DRF + async views + Celery + Datadog. Squashed migrations, observable, load-tested.
- Django 5 + DRF + Celery + Redis
- Two senior engineers paired
- 30-day walk-away both ways
- IP assigns on every commit
Django migration / rebuild
8 to 12 weeks. Take an existing Django codebase and rebuild for production. Behind-flag cutover. Performance and cost targets locked in scope.
- Django 3 / 4 5 LTS
- Migration squash + reversible
- DRF rebuild + N+1 cleared
- pytest coverage targets locked
“P99 dropped from 1.4s to 180ms. The bill cut a third. Best engagement we’ve paid for.”
— Eleanor B., CTO, UK B2B SaaSWhat CTOs actually ask before signing
Pain-first, soft-second.
We default to the patterns the Django community has settled on for production: typed where it matters, observability from day one, idempotent writes, CI gated on the query log. Django 5 plus DRF handles 99% of the Django development behaviour we need on day one. If you’ve a strong reason to deviate, we’ll discuss it in the audit week.
Stay where you are if it’s working. We’ll tune the costs. Move to AWS only when the bill or compliance warrants it. We’re comfortable on AWS, GCP, Azure, Cloudflare, DigitalOcean, Vercel, and Fly.io, and we’ll deploy where your team already is.
select_related and prefetch_related are a code-review gate, not an afterthought. django-silk runs in dev so you can see the query count on every endpoint. The query log is gated in CI, so a regression fails the build before it ships. That’s how 240 queries per request becomes one or two on every page we touch.
30-day walk-away both ways. Milestone billing 25/25/25/25. UK VAT registered, listed on Companies House, shipping since 2019. You’re never more than four weeks at risk of paying for nothing.
Every Django project has two senior engineers paired, not one. Every decision goes into an ADR the same day. Mohit reviews every PR. In seven years, two engineers have left mid-project. Both handovers were inside 48 hours, and neither client noticed.
Yes. We’ve done it for UK clients in 2025. Your existing backend, whether Rails, Django, .NET, Java, or Go, stays. We build the Django layer with typed contracts. You get senior-grade Django without rebuilding what already works.
Yes, with 14 days’ notice. Engineers move to other projects. Spend pauses. Resume with 14 days’ notice. No cancellation fee. No restart fee.
Yes, with mutual agreement. Several of our engineers have moved in-house to client teams over the years. The contract has a clean intro fee built to make the transition friction-free, not punitive. We’d rather you have a great in-house team than be locked into us forever.
In context
Inside the work.
A look at the kind of django development surface we hand over — real screens, real data, documented and yours from day one.
One paragraph. That’s it.
Tell us what the build needs to do, who uses it, and what success looks like. Mohit replies inside 24 hours: a clear yes, a clear no, or the one question that decides it.
What happens after the email lands
- < 24h
A personal reply.
Yes, no, or the deciding question. Straight to your inbox.
- Week 1
Audit week begins.
Architecture, performance, scale, hire path, signed scope.
- Launch
Holds at scale.
Observable, tested, hire-ready. Capacity number in the runbook.