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Companies Using Flask in United Kingdom

133 companies are hiring Flask talent in United Kingdom.

Flask is a lightweight Python web framework used to build APIs, internal tools, and data-heavy web applications. When a company is actively hiring for Flask, it signals they are building or scaling custom backend infrastructure — not buying off-the-shelf SaaS. These companies are in active procurement mode for cloud hosting, data infrastructure, API management, and developer tooling.

Buying Signal

A company hiring Flask engineers in the UK is likely mid-build on a product or platform that requires backend API development, often alongside a data pipeline or ML workflow. This is a strong signal for vendors selling cloud services, observability tools, or CI/CD platforms — the engineering investment means budget is already allocated. DevOps tooling vendors and infrastructure-as-a-service providers should be prioritising these accounts now.

Top Companies46 shown

CompanyIndustryHQ LocationSizeJobsLinks
Capco
capco.com
 Financial Services Greater London, United Kingdom 5,001+ 1,037
Qualitest
qualitestgroup.com
 IT Services and IT Consulting City of London, United Kingdom 5,001+ 500
Fidelity International
fidelityinternational.com
 Financial Services City of London, United Kingdom 5,001+ 260
Acuity Analytics
acuityanalytics.com
 Financial Services Greater London, United Kingdom 5,001+ 146
NEC Software Solutions
necsws.com
 IT Services and IT Consulting Dacorum, United Kingdom 5,001+ 194
Photon
photon.com
 IT Services and IT Consulting Greater London, United Kingdom 5,001+ 163
DNEG
dneg.com
 Animation and Post-production Greater London, United Kingdom 5,001+ 240
Mastek
mastek.com
 IT Services and IT Consulting United Kingdom 5,001+ 78
British Council
britishcouncil.org
 Non-profit Organizations Greater London, United Kingdom 5,001+ 94
The Access Group
theaccessgroup.com
 Software Development Charnwood, United Kingdom 5,001+ 414
Fitch Group, Inc.
fitch.group
 Financial Services Greater London, United Kingdom 5,001+ 59
Canonical
canonical.com
 Software Development Greater London, United Kingdom 1,001–5,000 1,842
RES
res-group.com
 Services for Renewable Energy Dacorum, United Kingdom 1,001–5,000 349
Tide
tide.co
 Financial Services Greater London, United Kingdom 1,001–5,000 301
Ciklum
ciklum.com
 IT Services and IT Consulting Greater London, United Kingdom 1,001–5,000 661
YouGov
yougov.com
 Business Intelligence Platforms Greater London, United Kingdom 1,001–5,000 145
Kraken
kraken.tech
 Technology, Information and Internet City of Westminster, United Kingdom 1,001–5,000 191
Oxford Nanopore Technologies
nanoporetech.com
 Biotechnology Research Oxford, United Kingdom 1,001–5,000 92
Gamma
gammagroup.co
 Telecommunications Greater London, United Kingdom 1,001–5,000 69
Euromonitor International
euromonitor.com
 Market Research Greater London, United Kingdom 1,001–5,000 80
Global
global.com
 Broadcast Media Production and Distribution City of Westminster, United Kingdom 1,001–5,000 52
Palta
palta.com
 Software Development Greater London, United Kingdom 501–1,000 115
La Fosse
lafosse.com
 Business Consulting and Services Greater London, United Kingdom 201–500 333
Scrumconnect Consulting
scrumconnect.com
 Software Development Greater London, United Kingdom 201–500 97
iwoca
iwoca.co.uk
 Financial Services City of Westminster, United Kingdom 201–500 190
Faculty
faculty.ai
 Technology, Information and Internet Greater London, United Kingdom 201–500 84
9fin
9fin.com
 Financial Services Greater London, United Kingdom 201–500 80
Qodea
qodea.com
 IT Services and IT Consulting City of London, United Kingdom 201–500 59
payabl.
payabl.com
 Financial Services Greater London, United Kingdom 201–500 56
Parser
parserdigital.com
 IT Services and IT Consulting City of London, United Kingdom 201–500 63
Zenitech
zenitech.co.uk
 IT Services and IT Consulting Greater London, United Kingdom 201–500 124
hackajob
hackajob.com
 Software Development Greater London, United Kingdom 51–200 1,389
targetjobs UK
targetjobs.co.uk
 Technology, Information and Internet Greater London, United Kingdom 51–200 1,727
Haystack
haystackapp.io
 Technology, Information and Internet Newcastle upon Tyne, United Kingdom 51–200 605
SR2 | Socially Responsible Recruitment | Certified B Corporation™
sr2rec.com
 IT Services and IT Consulting Bristol, United Kingdom 51–200 234
hireful
hireful.com
 Software Development Wellingborough, United Kingdom 51–200 110
myGwork - LGBTQ+ Business Community
mygwork.com
 Technology, Information and Internet Greater London, United Kingdom 11–50 1,933
EY
ey.com
 Professional Services Greater London, United Kingdom 10,001+ 1,635
Barclays
home.barclays
 Financial Services Greater London, United Kingdom 10,001+ 1,711
Mott MacDonald
mottmac.com
 Civil Engineering Greater London, United Kingdom 10,001+ 1,440
Endava
endava.com
 IT Services and IT Consulting Greater London, United Kingdom 10,001+ 512
Intertek
intertek.com
 International Trade and Development City of Westminster, United Kingdom 10,001+ 289
Clarivate
clarivate.com
 Information Services Greater London, United Kingdom 10,001+ 369
Sage
sage.com
 Software Development Newcastle upon Tyne, United Kingdom 10,001+ 391
BBC
bbc.co.uk
 Broadcast Media Production and Distribution City of Westminster, United Kingdom 10,001+ 127
Admiral Group Plc
admiralgroup.co.uk
 Financial Services Cardiff, United Kingdom 10,001+ 55

133 companies use Flask. Want the full list?

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Companies with open Flask roles in United Kingdom. Company HQ may be in a different location.

Market Signal

134 UK companies posting Flask-related roles points to sustained, deliberate investment in Python-based backend development — not a spike. The volume skews toward IT services and financial services, where custom API development is replacing legacy systems.

Stack Intelligence

Flask almost always appears alongside Python, PostgreSQL, Celery, Docker, and FastAPI — a stack that signals mature, containerised microservices architecture with async task processing. Companies hiring across this combination are building production-grade systems, not prototypes. For sales teams, this stack profile identifies mid-to-large engineering orgs likely evaluating managed Postgres providers, container orchestration platforms, and API gateway solutions.

Hiring Landscape

Flask in the Market

Where and how companies hire Flask talent

By Industry

IT Services and IT Consulting
35
Software Development
23
Financial Services
19
Technology, Information and Internet
12
Business Consulting and Services
5
Information Technology & Services
4
Data Infrastructure and Analytics
3
Information Services
3

Top Roles

Software Engineer69Data Engineer53Product Manager44Project Manager44Data Scientist40Full Stack Engineer38Devops Engineer36Business Analyst35Python Developer34Data Analyst33Machine Learning Engineer33Full Stack Developer32

Related Technologies

PythonPostgreSQLCeleryDockerFastAPI
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Frequently Asked Questions

What is Flask?

Flask is a Python framework that developers use to build web APIs and backend services quickly and with minimal overhead. Businesses choose it when they need custom application logic that packaged software cannot provide. Hiring for Flask signals active backend development investment.

Why should sales teams track Flask hiring?

Flask hiring reveals companies building proprietary infrastructure, which creates demand for complementary tools across the entire DevOps and data stack. A single Flask job posting can indicate imminent spend on cloud, monitoring, or data platforms. Sales teams can use this signal to time outreach to engineering and infrastructure buyers.

Who should be selling to companies that use Flask?

Vendors best positioned to prospect Flask-hiring companies include cloud infrastructure providers, managed database services, API security and gateway platforms, and developer observability or monitoring tools.