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Python development company · UK
Python Development Company in the UK
Work with a UK-focused Python development company for stable APIs, reliable data flows, and production services your product can grow on. Techsleight Labs plans, designs, builds, QA-tests, launches, and supports production software with senior engineers, weekly demos, and clear delivery ownership.
- Strategy, build, QA and launch in one team
- Fixed-price projects after discovery
- Code and IP owned by you
Capabilities
Python capabilities we bring to your product.
Python covers more ground than most languages, so we match developers to the Python you actually need: web back ends, data work, automation or AI.
FastAPI for lean, typed APIs
Async FastAPI services with Pydantic models and generated OpenAPI docs — a good fit in front of AI models and as an integration layer.
Pipelines and ETL jobs
Extract, clean and load jobs with pandas or Polars and SQL, scheduled and monitored, with checks that stop bad data before it reaches a report.
LLM calls in Python code
OpenAI, Claude and Gemini SDKs, structured outputs validated with Pydantic, embeddings and vector search, and test sets that catch regressions.
Testing and typing
pytest with fixtures and factories, type hints checked by mypy or Pyright, Pydantic at the boundaries and Ruff for linting and formatting.
Upgrades and packaging
Code moved off end-of-life Python versions, dependencies pinned with uv or Poetry, and a folder of scripts turned into an installable package.
What we build
What we build with Python.
Much of the Python work UK businesses bring us replaces a manual step someone repeats every week in a spreadsheet.
Reconciliation and reporting
Jobs that pull from Xero, bank feeds and Stripe, match transactions, flag exceptions and build the month-end pack without copy and paste.
Spreadsheet and file automation
Supplier price lists, timesheets and stock files picked up from shared mailboxes or folders, validated, merged and loaded into your systems overnight.
Django and FastAPI back ends
APIs, admin tools, permissions and Celery background jobs for products where the data model is the hard part.
LLM steps inside pipelines
Classification, summaries and field extraction by an LLM as one step of a Python job, with outputs validated by Pydantic and sampled for human review.
Analyst scripts made dependable
Reports that live in a Jupyter notebook or on one laptop turned into tested, scheduled jobs, so the numbers refresh without anyone re-running cells.
Company and sanctions checks
Companies House lookups for officers and filings, and screening against the UK sanctions list, built into onboarding with every check logged.
Technology stack
Technology stack.
The tools that usually sit around Python in the projects we join. We fit into your stack — this is where we are most at home.
Web frameworks
DjangoDjango REST FrameworkFastAPIFlask (existing apps)
Data work
PostgreSQLpandas and PolarsSQLAlchemyJupyter
AI and machine learning
OpenAI, Claude and Gemini SDKspgvectorPyTorchTensorFlow
Jobs and automation
Celery and RedisScheduled jobsAWS LambdaPlaywright for browser tasks
Code quality
pytestmypy or PyrightRuffuv or Poetry
Running in production
DockerAWSGunicorn and UvicornGitHub Actions
Pricing
Python development pricing.
Start with discovery, move to a fixed-price build, or run a dedicated team for a longer roadmap.
Python discovery sprint
From £2,000
Architecture, roadmap, cost planning, and project-risk validation
- A short strategy sprint covering technical scope, user flows, delivery plan, and budget range.
Managed Python development project
Fixed quote
MVPs, rebuilds, SaaS platforms, dashboards, portals, and business-critical launches
- Product planning, UX, engineering, QA, deployment, and post-launch support under one delivery owner.
Dedicated Python development team
From £9,500 per month
Longer roadmaps, multi-sprint delivery, and product teams that need extra senior capacity
- A stable engineering pod with weekly demos, sprint planning, code review, and transparent reporting.
Prices are in GBP. Every estimate is confirmed in writing after a discovery call — the figures above are where engagements start, not a quote.
How we deliver
How we deliver your Python project.
Seven stages, the same on every project. The length of each one changes with the work; skipping one never saves time for long.
- 01
Product and technical discovery
We map your Python product goals, users, integrations, compliance needs, timeline, and commercial priorities before planning the build.
Goals, users and constraints agreed
- 02
Architecture and delivery plan
You get a practical Python roadmap with milestones, team shape, risks, estimates, and the first release path.
Roadmap, team and estimate
- 03
Design, build, and QA
Our team ships the Python product in controlled sprints with code review, testing, demos, and visible progress every week.
Tested software every sprint
- 04
Launch and improvement
We handle deployment, analytics, monitoring, handover, and post-launch iterations so your Python platform keeps improving.
Live, monitored and documented
Why Techsleight
What working with us is actually like.
No inflated numbers — just how we run projects, and what you can hold us to.
Product engineering, not ticket-taking
We ask what the software is for before we estimate it — and we will tell you when something should not be built, or should be bought instead.
AI where it earns its place
LLM features, retrieval and automation built with evaluation, guardrails and cost controls, and plain software where that is the better answer.
Full-stack under one roof
Design, frontend, backend, mobile, cloud and QA in one team, so nothing falls between suppliers.
UK-focused delivery
UK business hours, estimates in pounds, and a contract with a UK company. Our engineers are based in the UK and India.
Flexible engagement
A fixed-scope project, dedicated developers or a monthly retainer — and you can move between them as the work changes.
You own everything
Code, IP, cloud accounts and documentation are yours from day one. We sign an NDA before discovery if you need one.
Support after launch
We stay on for fixes, upgrades and new features, or hand over cleanly to your in-house team with the documentation to match.
Relevant work
Python projects from our case studies.
Client work where Python was part of the stack. Each case study covers the brief, the approach and the result.
All case studiesFAQs
Questions we get asked.
Straight answers on scope, cost, timelines and how we work. If yours is not here, ask us directly.
What does a Python development company do?
A Python development company plans, designs, builds, tests, deploys, and supports Python software. At Techsleight Labs, that can include discovery, architecture, UI/UX, API integration, QA, cloud deployment, analytics, and post-launch roadmap support.
Do you work with companies in the United Kingdom?
Yes. This Python development company page is focused on United Kingdom businesses. We support UK collaboration with clear written updates, weekly demos, and planned handoff points so distributed teams can move quickly.
How much does Python development cost?
Python development pricing depends on scope, integrations, user roles, design depth, compliance needs, and launch timeline. Discovery sprints start from £2,000, dedicated teams start from £9,500/month, and managed projects are quoted after scope validation.
Can you build a complete Python product, not just provide developers?
Yes. You can use Techsleight Labs as a full Python development company for strategy, design, engineering, QA, deployment, and support. You can also start with a small discovery sprint before committing to the full build.
Can you improve an existing Python application?
Yes. We often join existing Python products to fix performance, improve architecture, add features, stabilise releases, modernise UI, or prepare the system for scale. We begin with a focused audit so the first sprint is practical.
Who owns the code and product IP?
You own the code, documentation, product IP, design assets, and infrastructure setup created for your project. We can sign an NDA before discovery and work inside your repositories, cloud accounts, and project tools.
How fast can a Python development project start?
Discovery can usually begin within a few working days of the first call, and most projects start within 5–7 working days of sign-off. Larger builds usually need a short planning sprint to confirm scope, architecture, milestones, risks, and the right team before full development begins.
Do you provide post-launch Python support?
Yes. After launch, we can continue with monitoring, bug fixes, performance improvements, security updates, roadmap features, analytics, and handover support. Many clients keep a monthly retainer after the main release.
Start a project
Planning a Python project?
Tell us what you are building with Python. We will reply within one working day with questions, a first view on approach and the next step.
What happens next
- 1A senior engineer reads your brief within one working day, and replies with questions or a first view.
- 2A 30-minute call to understand the goal, constraints and what good looks like — no sales script.
- 3A written proposal with scope, milestones, team and a GBP estimate you can take to your board.
Techsleight Labs is a trading name of Krapton IT Consultancy.
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