Company profile

Flagstone Tech Stack

Multi-bank cash deposit platform for advisers, businesses and savers

Financial Services London 201–500 employees Founded 2013 Privately Held

Flagstone runs a UK cash deposit platform giving savers, businesses and adviser-referred clients access to many banks through a single account. Its Microsoft-centric stack (Azure, .NET/C#, Bicep, Terraform, Sentinel, Defender XDR) points to an ongoing migration of legacy services onto Azure and a dedicated AppSec push. Sales-led hiring and repeated referral-friction themes show distribution through independent advisers is the main growth lever.

Tech Stack 43 technologies

Core StackTerraform React React Native TypeScript .NET C# Workday Xero QuickBooks JavaScript Selenium Figma Salesforce Power BI Python InVision Jest Azure Bicep ExpressRoute AWS Bedrock Microsoft Sentinel Defender XDR Azure Defender for Cloud NET Core NUnit SpecFlow Salesforce Marketing Cloud LexisNexis Purview+11 more

What Flagstone Is BuildingChallenges and projects from their job posts

◆Challenges

Low and friction-heavy adviser referral activity
Engaging and activating independent financial advisers
Deepening and expanding the partner ecosystem
Growing assets and revenue

▲Active Projects

Migrating legacy and live services onto Azure
Adviser referral experience
API partner integrations via shared front door
Application security programme
Bank portal build
High-net-worth acquisition and ISA growth

Hiring Activity

Decelerating15 roles · 3 in 30d

Department

Sales

Engineering

Product

Security

Data

Marketing

Seniority

Senior

Lead

Mid

Manager

Staff

Notable leadership hires: Relationship Team Lead, Squad Lead, Engineering Lead

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About Flagstone

Flagstone is a London-headquartered, privately held savings platform founded in 2013, employing 201–500 people. Clients use one onboarding to hold deposits across multiple partner banks, spreading cash over instant access, fixed term and ISA products. It serves individuals, high-net-worth clients, corporates, SMEs, charities and trusts, plus wealth managers and financial advisers who refer clients. Hiring is concentrated in the United Kingdom.

HeadquartersLondon

Company Size201–500 employees

Founded2013

Hiring MarketsUnited Kingdom

Frequently Asked Questions

What tech stack does Flagstone use?

Flagstone builds on Azure with .NET, C#, TypeScript, React and React Native, using Terraform and Bicep for infrastructure, Microsoft Sentinel and Defender XDR for security, plus Salesforce and Power BI.

What is Flagstone working on?

Current initiatives include an adviser referral experience, an application security programme, API partnership integrations, a shared integration front door, a bank portal and migrating live services onto Azure.

Is Flagstone hiring?

Yes, in the United Kingdom, with sales leading the mix alongside engineering, product and security roles, mostly at senior and lead level. Overall hiring velocity is currently decelerating.

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How this profile is built

Flagstone's technology stack, projects, and hiring signals are inferred from public hiring and company data — career pages, public listings, and company web presence — then clustered and de-duplicated. Figures are estimates that refresh over time. Read our full methodology →

This is not an official vendor or customer list. It is a technology-adoption signal inferred from public data, intended for B2B research.