Top Tech Jobs & Startup Jobs in London

Manage cloud financial operations across AWS, Databricks, and Datadog, optimizing cloud spend and driving cost-saving initiatives. Partner with Engineering, Finance, Legal, Vendor Management, and eBay to align cloud usage with business objectives and financial forecasts. Provide actionable insights, support strategic growth, and improve cost visibility in a fast-paced, agile environment.

Provide onsite and remote IT support during Depop’s integration with eBay, including hardware refreshes, device and account setup, troubleshooting, onboarding, AV support, and migration assistance. Resolve employee issues, identify recurring problems, maintain documentation, and explain technical changes clearly to nontechnical colleagues while collaborating with Depop and eBay IT teams.

Build and maintain Kafka Connect services and streaming data pipelines for Depop’s data platform. Extend the bronze streaming layer, implement data contracts and freshness checks, develop quarantine and alerting systems, support event onboarding and troubleshooting, document technical decisions, and collaborate with senior engineers and teams across data infrastructure, ML, and insights.

Lead the research, design, productionization, and scaling of machine learning models for pricing and shipping optimization. Own high-impact projects, conduct rigorous experiments, apply causal inference and optimization techniques, collaborate with engineers and cross-functional stakeholders, communicate findings, and mentor junior team members.

Build, maintain, scale, and improve Depop’s search and recommendation systems serving over one million daily users. Collaborate with product managers, data scientists, mobile, web, and backend engineers to design solutions, write high-quality code, manage workflows and data throughout their lifecycle, and document features. The role includes working with distributed systems, retrieval technologies, databases, message queues, ML-driven systems, testing, DevOps practices, and continuous improvement processes.

Product Manager for Core Payments owning roadmap for market expansion, compliance, authentication, balance protection, and payments reliability. Work cross-functionally with engineering, finance, legal, tax, fraud and external vendors to reduce risk and cost while improving authorisation rates, transaction costs, and payments P&L.

Design end-to-end experiences that help new Depop sellers make their first sale, including onboarding, listing flows, milestones, and trust signals. Partner with Product, Research, Data, Engineering, and CRM teams to translate insights into simple, motivating user experiences. Apply UX, UI, prototyping, experimentation, behavioral design, and design-system thinking while contributing to product strategy and roadmap development.

Own end-to-end machine learning systems for Depop’s Trust Detection team, addressing phishing, counterfeit goods, fraud, abuse, and prohibited content. Responsibilities include problem framing, data strategy, deep learning and LLM development, multimodal modeling, deployment, experimentation, evaluation, and production iteration. The role partners with Trust, Policy, and Product teams to build scalable, robust systems in ambiguous and adversarial environments and communicate technical trade-offs and impact.

Build and maintain iOS payment experiences for wallet balances, checkout, withdrawals, refunds, seller onboarding, and tax capture. Contribute to migrating payment surfaces from UIKit to SwiftUI, write automated tests, handle complex state and edge cases, and own features end to end. Collaborate with backend engineering, product, design, and senior engineers while supporting globally compliant marketplace payment flows.

As a Staff Backend Engineer, you'll lead the technical vision for Payments and Fulfilment systems, mentor engineers, and ensure scalability and security.