Plum Tech Stack

Mobile-first fintech app for automated savings and investment

Financial Services London, England 201–500 employees Founded 2016 Privately Held

Plum is a mobile fintech platform built on iOS and Android (Swift, Kotlin, Jetpack Compose) backed by Python microservices (FastAPI, Flask), PostgreSQL, and BigQuery. The engineering-heavy hiring mix—13 of 23 open roles—combined with active projects around experimentation platforms, user lifecycle systems, and operational automation suggests the company is scaling growth infrastructure faster than product features, likely to support rapid user acquisition and retention optimization.

Tech Stack 49 technologies

Core StackSwift Python FastAPI Flask PostgreSQL BigQuery dbt Redis MongoDB Kubernetes Docker RabbitMQ AWS Kotlin Jetpack Compose Terraform Grafana Prometheus Datadog Sentry Iterable iOS SDK SQLAlchemy iOS Android Material Design Spring Boot GCP Android architecture components Incident.io+19 more

What Plum Is Building

◆Challenges

Accelerating user growth
High-volume experimentation
Reducing time to market
Improving process efficiencies
Optimizing campaign performance
Backlog reduction
Increasing automation rate
Optimizing operational processes
Resolving operational incidents
User issues with app

▲Active Projects

Growth and market expansion initiatives
High-volume experimentation platform
Core user lifecycle system
Mobile-to-backend integration
Plum android app development
Customer lifecycle optimization
Crm campaign automation
Data integration improvement
Operational automation transformation
Tax wrapper management capability

Hiring Activity

Accelerating25 roles · 20 in 30d

Department

Engineering

Ops

Support

Executive

Finance

Marketing

Product

Seniority

Senior

Mid

Staff

Intern

Manager

Director

Junior

Lead

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About Plum

Plum provides a mobile savings and investment application for UK and European consumers. Founded in 2016 and based in London, the company operates as a privately held fintech with 201–500 employees. The platform is built across iOS and Android mobile clients, with backend services running on AWS and GCP. The product architecture spans user onboarding and lifecycle management, investment account handling, campaign automation, and tax-wrapper management. Plum is actively hiring across engineering, operations, and product roles in the UK, Cyprus, and Greece.

HeadquartersLondon, England

Company Size201–500 employees

Founded2016

Hiring MarketsCyprus, Greece, United Kingdom

Frequently Asked Questions

What tech stack does Plum use?

iOS (Swift) and Android (Kotlin, Jetpack Compose) on mobile; Python (FastAPI, Flask) backends; PostgreSQL and BigQuery for data; Kubernetes and Docker for orchestration; Redis, MongoDB, RabbitMQ for queuing and caching; AWS and GCP cloud infrastructure.

Where is Plum hiring?

United Kingdom, Cyprus, and Greece. The company has headquarters in London and is expanding recruitment across Southern Europe.

How this profile is built

Plum'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.