Top Tech Jobs & Startup Jobs in London

Design and implement APIs, data pipelines, and services powering digital-asset trading experiences. Build and aggregate trading protocols, aggregators, and trade types; develop features for Phantom’s web platforms; support new blockchain integrations and complementary products; engage directly with users and developers; and contribute to team growth and hiring standards.

Design, build, and optimize Phantom’s streaming blockchain data platform, including scalable ETL pipelines, data models, schemas, quality frameworks, observability, and high-availability systems. The role delivers accurate, low-latency token, price, and spam data to engineering teams, collaborates cross-functionally, and contributes to team growth. Experience with backend systems, modern data engineering, and Web3 or on-chain data is expected.

Analyze consumer product behavior, design and evaluate A/B tests, define product metrics, and build reusable analytical datasets and dbt models. Use SQL, Python, Snowflake, Dagster, and ETL pipelines to support reliable analysis. Partner with Product, Engineering, Design, and Growth to influence activation, engagement, retention, and monetization decisions. Independently solve ambiguous problems and communicate recommendations to technical and nontechnical stakeholders.

Manage and scale AWS EKS Kubernetes clusters, automate infrastructure with Terraform or Pulumi, optimize system performance, maintain blockchain nodes, scale databases handling terabytes of data, and improve reliability through monitoring and observability. Collaborate with backend and product teams to support feature development and platform scalability.

Own end-to-end relationships with Phantom’s VIP members through in-app messaging and other channels. Responsibilities include onboarding, proactive check-ins, resolving high-stakes wallet and transaction issues, triaging escalations, coordinating exclusive experiences, communicating with product and engineering teams, and developing playbooks and service standards as the VIP program scales. The role requires deep crypto knowledge, discretion, strong written communication, security awareness, and flexible evening or weekend availability.

The Senior Software Engineer will develop features for Phantom's web platforms, lead new product initiatives, interface with users, and contribute to team culture.

Lead ownership of CI/CD and SDLC infrastructure, automating mobile release pipelines, improving end-to-end test automation, optimizing pipeline performance, and enhancing developer experience while ensuring security and compliance for a consumer fintech product.