Top Tech Jobs & Startup Jobs in London

Design, develop, and maintain scalable backend systems focusing on greenfield development and improvements. Build REST APIs and microservices for payment, treasury, transaction booking, and crypto systems using Java and Postgres. Follow Spring Boot, TDD, DDD, and CI/CD practices to deliver maintainable, high-performance services.

Own and build the KYC customer verification product: define vision and roadmap, lead engineers and cross-functional teams, translate regulatory and risk needs into product specs, track KPIs, optimize verification journeys, and continuously improve onboarding and due diligence.

Work directly with founders to lead cross-functional, revenue-driving initiatives: launch monetization streams, design activation and cross-sell programs, execute local growth (community, affiliates, influencers), negotiate commercial terms, and track P&L impact of projects to improve revenue, margins, and operating costs.

As a Data Analyst, you'll analyze data, build dashboards, identify trends, support decision-making, and contribute to modeling and experimentation in a fintech setting.

The Growth Analytics Lead will analyze growth data, define KPIs, conduct complex analyses, and support strategic recommendations for business performance.

As a Product Designer at ARQ, you'll create user-centered designs for a wealth and investment product, collaborating with teams to enhance user experience and bring concepts to life using Figma.

Design, develop, and maintain scalable backend systems and microservices. Build REST APIs, work on card payments, treasury, transaction booking, and crypto liquidity. Emphasize clean code, maintainability, TDD/DDD and CI/CD in a hybrid office environment.

Design, develop, and maintain scalable, secure backend systems. Build REST APIs and microservices for payments, treasury, transactions, and crypto liquidity. Work on greenfield projects and improve existing systems using Java, Postgres, Spring Boot, TDD, DDD, and CI/CD.

Design, build, and deploy machine learning models to detect fraud, prevent losses, and monitor risk. Work with Product, Engineering, and Operations to turn large-scale data into production-ready pipelines and model-serving solutions, monitor performance, and continuously improve model accuracy and business impact.

The Talent Acquisition Specialist will lead hiring efforts, build a talent team, and implement scalable recruitment programs to drive growth at ARQ. Responsibilities include sourcing candidates, managing hiring KPIs, and ensuring an exceptional candidate experience.