Django and FastAPI development services
Django and FastAPI development services for web applications and REST APIs, back ends for AI and LLM products, data pipelines and analytics, fintech and e-commerce platforms, and upgrades of older Django code, with dedicated Django and FastAPI developers for your team or a Python project delivered end to end.
What we build with Django and FastAPI
FastAPI services
Typed async APIs on FastAPI with Pydantic models validated at the edge, SQLAlchemy and Alembic migrations over PostgreSQL, and an OpenAPI document the clients are generated from.
Django applications
Web applications and back offices on Django’s ORM, migrations, admin and permissions, on current Django and Python releases, with HTMX for interactive screens served straight from Django templates.
Back ends for LLM products
FastAPI services in front of OpenAI, Azure OpenAI, Anthropic or self-hosted models: streamed responses, agents built with LangGraph or Pydantic AI, retrieval over pgvector or Qdrant, and the cost and failures of every request logged.
Django REST Framework and Ninja APIs
APIs for web and mobile clients on top of an existing Django application, with DRF serializers or Django Ninja’s typed schemas, throttling and an OpenAPI description, without a second codebase for the same data.
Background jobs and data pipelines
Celery or Dramatiq workers and scheduled pipelines with pandas or Polars transformations, retries and alerts, so a failed job is visible rather than silent.
Data-heavy APIs
Endpoints that compute with pandas, Polars, NumPy or scikit-learn for analytics, pricing and scoring products, with long calculations moved to workers and their results cached.
Fintech back ends
Payment, lending and accounting services with Decimal arithmetic, a database transaction around every balance change, KYC and open-banking providers behind adapters, and an audit trail per record.
Django commerce platforms
Saleor, Django Oscar or a custom catalogue for shops and marketplaces, with order, pricing and stock services, payments through Stripe or Adyen, and sync with ERPs and marketplaces.
Django and Python upgrades
Older Django releases and Python 2 code moved to current releases one version at a time, starting with a read-only review and a written list of risks, with deprecations cleared and tests added ahead of each step.
Hire Django developers
Dedicated Django developers
Django developers who join your team full time, work in your repositories, tracker and meetings, and report to your lead. You interview them; we carry the Ukrainian contract, payroll, invoicing and leave.
Django and FastAPI project delivery
A team that takes the Django and FastAPI project from scope to release: estimate, build, tests and deployment, with a technical lead on our side who owns the plan and the quality.
Django and FastAPI support and take-overs
An existing Django and FastAPI system taken over from another team or kept running: a read-only review and a written list of risks first, then fixes and new features in order of impact.
The dedicated team page explains how specialists join your team, and the outsourcing page covers project delivery, take-overs and how we charge.
Who works on your Django and FastAPI project
Python engineers
Django, FastAPI and AI back ends
Data engineers
Pipelines, workers and analytics
Front-end engineers
React, Angular or Vue
DevOps engineers
Containers, pipelines and observability
QA engineers
API and end-to-end test automation
Django or FastAPI
Django when the product is a web application with an admin, users, permissions and relational data, because it ships all of that. FastAPI when the product is an API, especially an async one in front of models, queues or other services. Many systems use both, and we will recommend one per component.
Either way: type hints checked by mypy or Pyright and Ruff in the pipeline, dependencies kept current, secrets from a vault, and pytest suites that ship with each feature.
Other frameworks we work in
Laravel development
Laravel development services: web applications and APIs, online shops and marketplaces, SaaS products, payment back offices, admin panels and Laravel upgrades, with dedicated Laravel developers or project delivery.
Next.js development
Next.js development services: web applications, SaaS front ends, e-commerce storefronts, marketing sites, AI product interfaces and migrations to the App Router, with dedicated Next.js developers or project delivery.
Vue.js and Nuxt development
Vue.js and Nuxt development services: Vue 3 applications, Nuxt sites, storefronts, SaaS dashboards, front ends for Laravel and other backends, and Vue 2 migrations, with dedicated Vue.js developers or project delivery.
Ruby on Rails development
Ruby on Rails development services: web applications, SaaS products, shops and marketplaces, APIs, Hotwire Native apps, and upgrades and take-overs of Rails codebases, with dedicated Rails developers or project delivery.
Flutter app development
Flutter app development services: cross-platform iOS and Android apps for fintech, health, media and retail, Flutter for web and desktop, backends and take-overs, with dedicated Flutter developers or project delivery.
Symfony development
Symfony development services: web applications, APIs on API Platform, SaaS and enterprise systems, Sylius and Shopware shops, Drupal modules and Symfony upgrades, with dedicated Symfony developers or project delivery.
Spring Boot development
Spring Boot development services: microservices and APIs, Spring Cloud, Spring Security and single sign-on, Spring Batch, Spring AI and Spring Boot 4 upgrades, with dedicated Spring Boot developers or project delivery.
React Native app development
React Native app development services: iOS and Android apps with Expo, native modules, moves to the New Architecture, over-the-air updates and store releases, with dedicated React Native developers or project delivery.
Electron app development
Electron app development services: desktop apps for Windows, macOS and Linux, auto-update, code signing and notarisation, native modules, upgrades and migrations, with dedicated Electron developers or project delivery.
Questions about Django and FastAPI development
Which industries do your Django and FastAPI developers work in?
AI and data products first: LLM assistants, retrieval and analytics platforms. Then fintech, with payment, lending and risk-scoring back ends; e-commerce and marketplaces, with catalogue, order and pricing services; SaaS and business software; cloud and infrastructure products, with automation services and control panels; healthcare, with patient portals and clinical data pipelines; and security software, with scanning and threat-intelligence platforms.
Do you have Django and FastAPI engineers on the team?
Yes. Our Python practice builds APIs, data pipelines, AI agents and retrieval-augmented generation on Django and FastAPI.
Can you build AI features into our Django or FastAPI system?
Yes: agents, retrieval over your own documents and vector search, served behind your existing API, with cost per request and failures observable rather than discovered on the invoice.
How quickly can Django developers start?
When the right Django developer is available, the start is gated only by your interview and the NDA and IP assignment. Otherwise we run a search, which typically produces candidate profiles within two to three weeks, and nobody starts until you have said yes.
How do we hire Django developers through BigTree108?
Tell us the work, the seniority and the hours you need. We propose one or two people with their profiles, you interview them the way you would interview your own hire, and you sign one agreement with BIG TREE 108 LLC and receive one invoice a month.
Who owns the work they produce?
You do. Every specialist has a signed contract with BigTree108 that assigns all work product to the company, and our agreement with you assigns it onward. Code, designs and documents are delivered into your own repositories and tools, not kept where only we can change them.
Building on Django or FastAPI?
Tell us what the system does and where it runs. You get an answer within one business day: a plan, candidate profiles, or a review of the existing code.