Top Python Jobs in London

Architect, develop, integrate, test, debug, and optimize embedded software for diverse hardware platforms using RTOS, bare-metal, Zephyr, and Linux environments. Lead software architecture, system validation, test automation, and multi-threaded application development while collaborating with hardware and software teams. Define test strategies, analyze defects, document designs, conduct code reviews, mentor engineers, optimize performance and power usage, and contribute to open-source projects.

Partner with founders and leadership to turn internal data, market research, and competitive analysis into strategic decisions. Own analytics from raw data through recommendations, identify growth and margin opportunities, build financial and business cases, and launch initiatives that improve efficiency, unit economics, and profitability. Drive strategic projects end-to-end while measuring progress against business outcomes.

Partners with founders and leadership to turn data into strategic decisions affecting growth, margins, and profitability. Owns analytics from raw data through recommendations, conducts market and competitive analysis, builds business cases, and leads strategic initiatives end-to-end. The role identifies efficiency and monetization opportunities, develops financial models, measures business outcomes, and supports cross-functional decision-making.

The role involves building and operating ML systems and infrastructure for large foundation models, data pipelines, and experiment orchestration in a collaborative environment.

The Principal Cloud DevOps Engineer will enhance infrastructure for ID verification solutions, automate deployments, manage teams, and collaborate with security teams.

Own end-to-end productionisation of ML models, build and mature the ML platform and serving architecture, integrate system testing and monitoring into training pipelines, automate releases and drift detection, and measure real-world impact alongside data scientists.

Own and operationalize audit-ready security controls (DORA, GDPR, SOC 2, ISO 27001) across AWS, Kubernetes, and application layers. Translate regulations into technical controls, automate evidence collection and compliance checks, lead audit preparation and walkthroughs, remediate issues, and partner with Legal, Compliance, Risk, and engineering to embed secure-by-default design.

Design, train, evaluate and deploy robust deep learning models from sensor input to user interface; integrate models into cloud and edge systems; work with customers to define problems; document, monitor and ensure safe, secure production AI solutions.

Lead analytics, ensure metric integrity, validate AI-generated analysis, design and interpret A/B tests, diagnose drivers of commercial performance, turn insights into prioritized actions, and build dashboards and self-serve tools to enable stakeholders.

Lead Java Developer responsible for delivering Real-Time and On-Demand Risk enhancements, managing the full development lifecycle, collaborating with global teams, and driving operational improvements.

Develop and optimize algorithmic trading software in modern C++ with strong focus on performance, memory management, and multi-threading. Prototype and analyze data using Python/Perl/Shell and SQL, apply ML frameworks, and collaborate globally. Recommend optimizations, use performance tools, and support low-latency trading systems.

Analyze large-scale post-trade data to review and refine client trading behaviour, implement performant C# production code, collaborate with research, engineering and front office, monitor real-world changes, and deliver medium-term strategic projects and urgent commercial improvements.

Own and evolve enterprise IAM platforms: design and operate authentication, identity federation, credential and privileged access solutions. Build SAML/OAuth2/OpenID Connect onboarding, rationalise identity providers, implement Teleport/JIT privileged access, define service account and certificate standards, build APIs and automation, and improve monitoring, logging, and operational maturity while partnering with engineering teams to migrate bespoke systems to standards-based IAM.

Lead and execute penetration tests and vulnerability assessments across infrastructure and applications (Kubernetes, Jenkins, Windows Domain Services). Deliver remediation guidance, assess security controls, support Risk/Compliance and Detection teams, build automation/tooling, and mentor junior team members to improve overall security posture.

Design, build and maintain ingestion pipelines and Databricks transformations; implement metadata-driven engineering, CI/CD, data testing and observability; evolve semantic models for reporting; lead and mentor a small engineering team and engage stakeholders to translate business needs into production-grade data products.

Set technical direction and architecture for backend systems and API integrations in a distributed microservices fintech platform. Design and implement reliable, highly available RESTful APIs, build third-party integrations, enforce observability and CI/CD best practices, optimize performance and scalability, produce technical documentation, and mentor engineers to raise engineering quality.

Lead a multidisciplinary Core Services engineering squad to design and operate distributed microservices for ledgers, balances, billing, and repayments. Translate product requirements into technical solutions, build integrations and REST APIs, enforce observability, maintain docs, improve performance and scalability, and drive CI/CD and infrastructure-as-code practices.

Lead the Core Services squad to design and implement scalable distributed microservices for ledger, billing, repayments and reconciliation. Translate product requirements into technical solutions, build integrations and REST APIs, enforce observability and CI/CD, create reusable libraries, maintain docs, and drive system performance and cross-team alignment.

Design, build, and maintain backend microservices and RESTful APIs; integrate with third-party vendors; ensure scalability, observability, and reliability; own technical architecture, CI/CD, and documentation; optimize databases and message-driven systems.

Develop AWS serverless, event-driven cloud-native applications; build streaming data pipelines; modernize legacy systems to microservices and API-first designs; implement CI/CD and Infrastructure as Code (CDK/CloudFormation); ensure monitoring, logging, and system reliability (CloudWatch).

Lead end-to-end research in computer vision and spatial AI, developing novel algorithms (metric learning, 3D geometry, vision-language) and moving prototypes to production-grade, real-time systems. Shape research roadmap, publish at top venues, mentor junior researchers, and collaborate with engineering to deliver deployable spatial intelligence.

Build and deploy tailored customer solutions across software and hardware: write data pipelines, backend services, UI components, install/configure hardware, and surface product feedback. Work on ambiguous problems, engage stakeholders and customers, and ensure successful on-site deployments (up to 50% time).

Build and maintain scalable, reliable backend infrastructure for a fintech platform: data pipelines, integrations, AI/LLM infrastructure, compliance automation, and user-facing APIs. Own performance, observability, security, and correctness for systems handling regulated financial data. Contribute to architecture, documentation, and operational excellence as the platform scales.

Own and deliver end-to-end product features across backend and frontend (Go, TypeScript, Python). Integrate LLMs and AI (prompt engineering, RAG) into adviser-facing workflows, collaborate with Product and Design, ensure regulatory-compliant, well-tested code, estimate and ship to deadlines, and shape product direction.

Own a $6M+ enterprise portfolio across DACH, Nordics, and Benelux. Drive adoption, retention, and expansion by building senior relationships, using product usage and health scores, documenting success plans, coordinating with Sales/Product/Engineering, mentoring junior CSMs, and leveraging AI-assisted tools for account research and engagement.