Python API MVP
Single FastAPI or Django service with auth and core endpoints
$8Kto $18K
- FastAPI or Django
- Auth + RBAC
- Docker deploy
40+ Python Backends in Production · Django, FastAPI, ML, Data
Python Development Company for Custom Applications and AI
Senior Python developers shipping Django 5, FastAPI, SQLAlchemy 2, Pydantic v2, Celery, and the modern AI and data stack with PyTorch, LangChain, and Pandas. Type-safe with mypy, tested with pytest, deployed via Docker. NDA before brief. Source code in your repository.
4.9 / 5from 2,495 reviews
ISO 9001 Certified
40+
Python Projects in Production
11 yrs
Shipping Since 2015
99.95%
API Uptime SLA Track Record
Top 1%
Python Developer Vetting Bar
Your Trusted Python Partner
Python Development for Web Backends, AI, Data, and Everything Between
Django + FastAPI, Type-Safe, Production Ready
Work with senior Python developers who have shipped Django and FastAPI to production for years. From SaaS backends and REST or GraphQL APIs to AI services with LangChain, PyTorch, and Hugging Face, data pipelines with Pandas, Polars, and Airflow, Celery worker fleets, and CLI tools shipped as Python packages. Type-checked, tested, and observable.
How Much Does Python Development Cost?
Honest USD Rate Bands From an Indian Senior Team
Most Python API MVPs we ship come in between $8K and $18K. Multi-module backends with workers, Postgres, Redis, and integrations usually fall between $25K and $55K. Enterprise Python platforms with microservices, ML pipelines, and data lakes start near $75K. Prefer a senior Python developer on your team instead? From $1,800 per month, first week on us.
- Most Common
Standard Python Backend
Multi-module backend with workers, queues, and integrations
$25Kto $55K
- DB + Redis + Celery
- OpenAPI docs
- CI/CD pipeline
Enterprise Python Platform
Microservices, ML pipelines, multi-tenant, data lake
$75Kand up
- Microservices
- ML pipeline
- Data lake
Dedicated Python Developer
A senior Python developer on your team, monthly rolling
$1,800per month
- Senior, vetted
- Monthly rolling
- 7-day trial
What We Build
What can we build with Python?
Six categories of Python work, from Django web backends to LLM apps and data pipelines.
Reference Architecture
Which architecture do we use for Python development?
Six layers we wire together on greenfield Python projects. Each layer is type-checked, testable, and observable by default.
API
FastAPI or Django REST Framework with OpenAPI 3 auto-docs. Strawberry for GraphQL. Pydantic v2 schemas, request and response validation at the edge.
Business Logic
Service layer with Pydantic models, clear domain boundaries. Type hints everywhere, mypy strict, ruff for linting. No business logic in views.
Data
PostgreSQL via SQLAlchemy 2 async or Django ORM. Alembic or Django migrations, Redis for cache and rate limiting, S3 for blobs, pgvector for embeddings.
Async / Background
Celery, Dramatiq, or arq for queued workers. asyncio and httpx for fan-out, gunicorn with uvicorn workers, structured retries via tenacity.
Security
OAuth2 with JWT or sessions, fastapi-users or django-allauth, RBAC at the service layer. Secrets via Vault or SSM, dependency scanning with pip-audit and Snyk.
CI / Release
Poetry or uv for deps, pytest with coverage, mypy and ruff in CI, multi-stage Docker images, GitHub Actions for build and deploy, Sentry on release. Zero-downtime migrations.
Every layer documented in your repository on day one
Delivery Process
How does our Python development process work?
From brief to production with predictable cadence and audit-friendly deliverables.
Day 0 to 5 Discovery and Architecture Audit
Day 6 to 10 SOW and Onboarding
Sprint 0 Scaffold and CI/CD
Every Sprint Two-Week Sprints
Milestone Production Release
Post-Launch Run and Maintain
7-day No-Risk Trial
The first week is on us
Engagement Models
What engagement models do you offer for Python development?
Transparent USD rate bands, rolling monthly cancel, no setup fees, no markup.
Hourly
Pay only for hours used
$20/hour
Tracked weekly, billed monthly
- Bug fixes and triage
- Performance and security audits
- Short surge work
- No minimum commitment
- Mutual NDA before brief
Most Popular Dedicated
Senior Python developer, full-time on your product
$1,800/month
Monthly rolling, cancel anytime
- One developer, only you
- Embedded in your sprint
- Reports to your stakeholders
- 7-day no-risk trial
- 48-hour replacement guarantee
Staff Aug
Plug into your existing Python team
$2,000/month
Per-developer monthly
- Joins your standups
- Your sprint, your tools
- Your codebase, your repo
- Scale up or down monthly
- 48-hour replacement
Fixed Scope
Locked deliverables and timeline
$8,000+ project
Per-milestone payments
- Best for MVPs and pilots
- Locked scope upfront
- Locked timeline
- Staging demo acceptance
- No surprise change orders
Production Work
What have we built with Python?
Four production Python deployments from Decipher Zone, all live and serving traffic.
- LIVE
FinTech Insights API
FinTech · FastAPI
FastAPI service powering real-time analytics for an SEC-registered investment adviser. Pydantic v2 contracts, SQLAlchemy 2 async, Celery for batch jobs, Sentry observability.
- FastAPI
- PostgreSQL
- Celery
- Redis
p95 latency
<120 ms
- LIVE
EdTech Content CMS
EdTech · Django
Django + DRF CMS for question banks, answer flows, and analytics. Multi-tenant via schemas, S3 for media, fine-grained RBAC, Cloudflare edge caching.
- Django 5
- DRF
- PostgreSQL
- S3
Uptime
99.97 %
- LIVE
Document Intelligence
AI · LangChain
LangChain pipeline ingesting PDFs, splitting, embedding to pgvector, retrieval with a fine-tuned reranker, served via FastAPI streaming endpoints to a Next.js front-end.
- LangChain
- pgvector
- OpenAI
- FastAPI
Docs / day
120K+
- LIVE
Logistics Data Pipeline
Data · Airflow
Airflow DAGs consolidating order, courier, and warehouse telemetry. Polars for transforms, dbt for warehouse models, Great Expectations for data quality.
- Airflow
- Polars
- dbt
- Snowflake
Records / hr
8M+
Frequently Asked
Python Development FAQs Product Leaders Ask Up Front
Pricing, Django vs FastAPI, AI and ML, DevOps, code ownership, answered straight.
How much does Python development cost?
Most Python API MVPs we ship run $8K to $18K. Standard backends with workers, integrations, and CI/CD usually fall between $25K and $55K. Enterprise Python platforms with microservices, ML pipelines, and data lakes start near $75K. Or hire a senior Python developer monthly from $1,800, first week on us.
How long does it take to build a Python backend?
A focused Python API MVP ships to staging in 4 to 8 weeks and to production in 6 to 10 weeks. Standard multi-module backends take 12 to 18 weeks. Enterprise platforms run 5 to 9 months. Working build at the end of every two-week sprint.
Django or FastAPI for my project?
Django when you want batteries included with admin, ORM, auth, templates, and a long roadmap of CRUD. FastAPI when you want async-first APIs, OpenAPI docs from type hints, and microservices. We pick based on your roadmap on the free architecture review. We ship both daily.
Do you build AI and LLM apps in Python?
Yes. LangChain or LlamaIndex pipelines, OpenAI, Anthropic, and open-source models via Hugging Face. PyTorch fine-tuning, vector stores via pgvector or Pinecone, retrieval with rerankers, FastAPI streaming endpoints. We ship eval and guardrails too.
Will you sign an NDA before I share my idea?
Yes. Mutual NDA in 24 hours before any technical discussion.
Will I own the source code and infrastructure?
Yes. Your repository owns the Python code from day one. You retain cloud accounts, secrets, and infrastructure. Full IP transfer in every SOW.
Do you handle deployment and DevOps?
Yes. Multi-stage Dockerfiles, GitHub Actions for build and deploy, Helm charts or ECS, secrets via Vault or SSM, observability via OpenTelemetry, Sentry on release, blue or green or rolling deploys. Zero-downtime migrations.
What is the 7-day trial on dedicated engagements?
Hire a dedicated senior Python developer from $1,800 per month. First 7 days are on us. Replace within 48 hours if not a fit. Monthly rolling, cancel anytime.
Do you offer post-launch support and maintenance?
Yes. Optional retainer with same team, same SLA. Security patches, Python version upgrades, dependency updates via Renovate or Dependabot, performance audits, quarterly load tests. 95 percent of clients extend past 12 months.
Why hire Decipher Zone for Python?
Senior developers only, NDA in 24 hours, code in your repo, 7-day trial, ISO 9001 process discipline, direct senior dev access, transparent pricing, 11+ years shipping Python in production.
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Free Python Architecture Review · Reply in 1 Business Day
Ready to Ship Python Development that Scales?
Send a brief. A senior Python developer reads it personally and replies within one business day with a free architecture review. No sales call, no pitch deck.
- Reply within 1 business day
- Free architecture review
- Mutual NDA before brief