Python Web Development Company

Trusted by founders.

Chosen for delivery.

At PLANEKS, we implement solutions that handle real-world complexity, integrations, and growing workloads.
Every solution our team designs is tailored to your specific challenges and designed to evolve as your business grows.
Bring your idea to life with a reliable custom Python web development company at your service. We specialize in full-cycle software development for startups and small-to-midsize enterprises. Take advantage of our unique technology and domain expertise, and reach new heights in your business.

Custom Python Web Development

Built from scratch, designed for the complexity your product will face at scale, delivering seamless and resilient performance.

  • 150+ Python projects delivered
  • From MVPs to systems serving 60,000+ users daily
  • Engineering expertise since 2009

Custom Python Development Services

Python Team Augmentation

PLANEKS’ Python engineers placed on your existing team contribute with production-level code from week one.

  • Teams integrated within 2 weeks
  • Engineers onboarded in 3-5 days
  • 120+ Python roles staffed for clients in the USA, Canada, Europe, the UK, and Australia

Python Staff Augmentation Services

API Development and Integration

Get an integration-ready backend capable of connecting with 2-120 external services without sacrificing long-term maintainability.

  • 12 integrations per project on average
  • 10,000+ API endpoints built across long-term client engagements
  • 250+ integrations delivered across all projects

API Development Services

MVP Development for Startups

A production-grade MVP that validates your idea fast and scales when it grows.

  • Designed for scale from the first commit
  • Delivery time of 8-12 weeks for MVPs that raised $500K+ pre-seed rounds
  • 40+ MVPs launched across 20+ industries

MVP Development Services

Python System Modernization

Legacy Python systems refactored into modular, maintainable architectures.

  • Performance improved by 40-200% after refactoring in documented cases
  • Development velocity increased 2-5x after modular restructuring
  • Operational burden reduced by 30-40% after legacy system refactoring

Python Code Audit Services

Our Achievements and Awards

top software developers
Top Software Development Companies in 2025
software_developers
Top Software Developers by Techreviewer 2024
top_clutch.co_python__django_developers_2024
Top Python Django Developers 2024
top_clutch.co_python__django_developers_ukraine_2024
Top Python Django Developers in Ukraine 2024
top_clutch.co_python__django_developers_2023 (2)
Top Python Django Developers 2023
top_clutch.co_python__django_developers_ukraine_2023 (1)
Top Python Django Developers in Ukraine 2023
top_clutch.co_web_developers_manufacturing_ukraine (1)
Top Web Developers Manufacturing Ukraine
top-rated-plus x2 (1)
Planeks Top Rated Agency by Upwork
Global Badge 2023 - Fall (1) (1)
Clutch Global winner
Champion Badge 2023 - Fall (3) (2)
Clutch Champion winner

Python Web Systems We Build

Our custom Python web development company builds architecture-first systems remaining stable as products, teams, and workloads grow.

SaaS platforms with scalable architecture

Tenant-aware Django systems with clear data separation, role management, and subscription logic - designed so new tenants, features, and workflows can be added without slowing down existing users.
SaaS Development Services

Custom platforms with complex integrations

Multi-role solutions with payments and third-party integrations built as composable systems with clear service boundaries, so every new workflow or integration has a predictable “place to live”.
Data Integration Services

Data-heavy dashboards & analytics systems

Query-optimized data layers with caching for aggregations, supporting concurrent analytical queries without degrading performance when processing large datasets and real-time queries.
Dashboard Services

API platforms & integration layers

Versioned API platforms connecting systems, from supporting payment providers, CRMs, ERPs, logistics, to analytics platforms, with custom third-party integrations and consistent contracts.
API Integration Services

What do people praise about PLANEKS?

Partner with a qualified custom Python web development company that has successfully delivered 150+ projects across SaaS, marketplaces, and data platforms – from MVPs to full-scale systems used by 250,000+ users.

PLANEKS comes to the table every week prepared with specific ideas on how to overcome the challenges at hand. They also present new ideas on how we could be doing things better. Translated to startup lingo, they’re hungry to solve problems with you, and come to the table prepared. Without them, there’s no way we’d be anywhere near where we are today.

Nicole Bocskocsky / CEO & Founder, Elaborate

5

ONLY BY OUR CLIENTS

150 +

COMPLETED PROJECTS

$ 120 mln

RAISED BY OUR CLIENTS

100 +

CLIENTS SERVED

Our domain expertise

Our portfolio has projects for over 100 clients across 20+ different industries. We have partnered with financial services, media, hospitality and leisure, business services, and many other companies. These four industries are the most in-demand right now.

Python Web Development Company
for Building Complex, Scalable Systems

We work with teams building new products and teams scaling existing ones – the focus is always the same: deliver Python software that stays stable when requirements change.

Proven Python experience

Our top Python web development company has delivered 150+ projects across SaaS, data and analytics platforms, and integration-heavy systems, from MVPs to products used by 60,000+ users.

Built for performance and scale

PLANEKS delivers systems designed to stay fast and stable as data volumes, integrations, and user load grow; performance is an engineering constraint we account for from the start.

Integration-ready architectures

We design backends to handle at least 5–20 external API connections per project. Our API-first implementations will keep the architecture clean as complexity grows.

Data-heavy systems

We design systems to process millions of records with consistent performance - proper indexing, query optimization, and async pipelines applied before data volume becomes a challenge.

Get to know more about our projects

Scalable systems start with the right architecture decisions. We treat architecture as the primary deliverable.

What our clients are saying

How We Design Python Web Systems That Scale

Scalable systems start with the right architecture decisions. We treat architecture as the primary deliverable.

04 Points

1

System design before development begins

We map data models, API contracts, integration points, and load patterns prior to writing application code. This ensures the system is aligned with both current requirements and future growth, so architectural decisions hold up when the product evolves.
2

Domain-driven approach to modeling business logic

Our custom Python web development company models business logic in terms of the domain, keeping it separate from database tables and framework conventions. Logic duplication stays low, and new engineers can read the codebase without a weeks-long onboarding process.
3

Performance-first engineering decisions

Database indexing, query planning, caching, and async processing are built into the design from the ground up. Bottlenecks under load become predictable and avoidable - response times stay stable as user numbers grow.
4

Architecture designed for long-term evolution

We design with clear extension points, versioned APIs, and component boundaries that allow the product to grow and evolve without requiring a full architectural overhaul 18 months after launch, or ever.

Our Clients

Python Technologies We Use – And Why

We choose technologies based on system requirements, using tools that have proven reliable across 150+ production systems. Every tool in the stack of our Python web development services company has a specific job and years of real-world adoption.

fastapi transparent

FastAPI

Best when high-throughput async I/O is a hard requirement. FastAPI with async PostgreSQL drivers handles concurrent requests with significantly lower latency under the same load. Used for microservices and high-volume API endpoints.
FastAPI Development Services
django green

Django

Django is used for product backends where a full-featured framework accelerates development. Django's ORM, admin, and auth handle boilerplate code included. Perfect when system requirements demand structure and a mature ecosystem.
Django Web Development Services
flask transparent

Flask

Flask is a modern Python web development framework that help engineers build web applications, APIs, and complex systems. This technology also allows integration with any existing ecosystems and adjustment of the code to the clients’ needs.
Flask Development Services
docker transparent

Docker + Cloud

All projects are containerized for environment consistency and horizontal scaling. The choice between Amazon Web Services (AWS), Google Cloud Platform (GCP), and DigitalOcean is based on your existing infrastructure, team capabilities, and load profile.
django rest svg

Django REST (DRF)

Django REST framework (DRF) is a library that has a highly-customizable architecture and numerous features that come out of the box. Authorization, serialization, and other technical aspects.
Hire DRF Developers
celery 35

Celery, Redis, RabbitMQ

Celery, Redis, and RabbitMQ handle all background task processing in automation-heavy and high-load systems - Celery for task orchestration, Redis for speed-sensitive queues, RabbitMQ when guaranteed delivery and durability are essential.

Real Engineering Outcomes From Our Python Projects

For our custom Python web development company, a delivered system is only successful if it continues to deliver business value, such as faster response times, stable infrastructure, and an architecture the team can actually build on.

3 x

Higher Load Capacity

Handled 3x increase in concurrent user load without degradation – the system now supports 10,000+ active users on the same infrastructure that was struggling at 3,000.

60 %

Reduced API latency

Reduced API latency by 40-60% on a data-heavy analytics backend by restructuring query patterns and introducing targeted Redis caching.

4 x

Faster Onboarding

Migrated a monolithic Django application to a modular architecture with explicit domain boundaries – without halting feature development, reducing engineer onboarding time from 4 weeks to under one.

70 %

Reduced Incedents

Integrated 10+ external services into a single logistics platform with a unified error handling and retry strategy – reducing integration-related incidents by over 70%.

Who We Work With

The clients we work with best know what their system needs to handle – and need a team that can design and build it to those requirements.

Teams needing Python backend expertise

We integrate within 2 weeks and contribute production-level code from the start - not just general recommendations.
Python Development Services

Businesses modernizing legacy systems

Refactoring legacy Python systems into maintainable architectures iteratively - keeping the product in production throughout.
API Modernization Services

Startups building scalable products from MVP

Our engineers design your system for the product you're building toward - so growth is evolution, not constant reconstruction. Teams growing from MVP to production without accumulating architectural debt.
Python Development for Startups
Start Building a Scalable Python Web System

Hire dedicated Python web developers and integrate them within 2 weeks. We design high-quality Python systems with the right architecture from the earliest stage and bring existing applications up to the performance and scalability standards your product now demands.

Our Approach

01

Discovery focused on system understanding

Our process starts with system constraints: data volumes, integration dependencies, and current bottlenecks, before any feature discussion begins.
02

Architecture design before development

Data models, API contracts, service boundaries, and async strategy are defined before development, ensuring predictable delivery and eliminating mid-project architectural pivots.
03

Iterative Python development and delivery

Short cycles with production-ready code delivered consistently, so integration problems surface during development, when there is still time to address them without disrupting the roadmap.
04

Ongoing optimization and scaling support

Performance optimization, scaling strategy, and architectural evolution support after launch, ensuring long-term system stability as your product and user base grow.

Our Team

Our team of dedicated Python experts brings together a powerful blend of technical excellence, innovative thinking, and a passion for building robust web solutions that drive your business forward.

1

Software Engineer
2

QA Manual Engineer
3

Software Engineer
denys demchenko python developer

Python Team Lead
5

QA Automation Engineer
6

Software Engineer

Why Choose Our Python Web Development Company

01

Python specialization instead of generalist teams

Generalist teams can build in Python. Yet, only specialists know when to use Django vs FastAPI, how to structure Celery for reliability at scale, and where indexing strategy matters most - fewer architectural mistakes, faster diagnosis.

02

Scalable architecture instead of short-term solutions

An architecture created only for today's requirements becomes a bottleneck the moment your product grows. We design for where your product is going, reducing the technical debt that accumulates when the scaling strategy is not prioritized.

03

System design instead of feature-driven development

Feature-driven development ships fast but creates architectural debt that slows subsequent releases. We prioritize system design upfront to reduce long-term technical debt and avoid costly rewrites.

FAQ about Python Web Development

How do you build scalable Python web applications?

We consider that scalability starts with solid architecture. Due to this, we map expected data volume, concurrent load, and integration requirements first - then design database schema, async processing, and API contracts to support that load. Django or FastAPI, PostgreSQL with indexing, Redis for caching, and Celery for background jobs are the standard building blocks. What varies is how they're composed for your specific system.

When should I choose Django vs FastAPI?

Both Django and FastAPI are strong choices - the right one depends on what your system needs to do. Django fits product backends with complex business logic, admin needs, and a mature ecosystem. FastAPI fits high-throughput async API endpoints, microservices, or when I/O concurrency is a hard constraint. The decision is always driven by your system's load profile.

Can you improve or refactor an existing Python system?

Yes - refactoring the existing system is a significant part of our Python web development company services. We audit systems for architectural problems and performance bottlenecks, then refactor iteratively without halting feature development. Our specialists prioritize changes with the highest impact on stability and developer velocity.

How do you handle high-load applications?

High load is an architectural problem, not a code-optimization challenge for us. Async processing with Celery, Redis caching to reduce database pressure, stateless horizontal scaling, and query optimization to prevent ORM bottlenecks. We also instrument systems properly so load-related issues surface in monitoring before they reach users.

To make requests for further information, contact us.

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    If you are looking for a tech partner with extensive tech and industry expertise, an impeccable reputation, and a large number of experienced engineers, choose the best Python web development company. Choose PLANEKS!
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