Top Software Engineer Jobs in London

Entry-level software engineer for Samsara's IoT platform. Work across backend, full-stack, mobile, or embedded teams to build scalable data ingestion, user experiences, and device software. Immediate ownership of production projects, collaborate with product/design, and use modern stacks and AI tools to ship features that impact customers.

Develop and deliver production AI/ML solutions across the full lifecycle using Agile methodologies. Translate business requirements into technical specifications, build secure production code and algorithms, create architecture artifacts, analyze large datasets, develop visualizations, troubleshoot systems, and identify improvements. The role requires expertise in machine learning, Python, Spark, distributed computing, AI frameworks, agentic workflows, and AWS services, while contributing to engineering communities and emerging technology initiatives.

Build and lead production iOS features for an AI-powered travel and expense platform. Design conversational and context-aware experiences using Swift, SwiftUI, modern concurrency, reactive patterns, and robust networking. Integrate LLM-driven capabilities, streaming APIs, offline support, notifications, analytics, experimentation, and privacy-focused state management. Collaborate with product, design, and backend teams while using AI coding tools and maintaining high code quality.

Build and maintain customer-facing single-page web applications using React. Deliver end-to-end features, fix defects, write tests, participate in code reviews, produce documentation, and collaborate with cross-functional teams while considering accessibility, security, observability, and performance.

Develop, test, and maintain customer-facing Android banking applications for Chase UK. Build reusable Kotlin code and intuitive Jetpack Compose interfaces, troubleshoot issues, participate in agile ceremonies and code reviews, and collaborate with product, design, and engineering stakeholders. The role also involves applying Android architecture patterns, integrating REST APIs, supporting testing and quality initiatives, considering performance, accessibility, and security, and responsibly validating enterprise-authorized AI-assisted development outputs.

Build and maintain full-stack web applications using React and backend technologies, develop ETL jobs for customer data in the Yext Knowledge Graph, improve development tooling, advise stakeholders on technical tradeoffs, collaborate with product, design, and project management, and deliver clean, tested code through Scrum-based development.

Design, implement, and maintain distributed software systems supporting Cloudflare’s application security products, including Rate Limiting and Web Application Firewall. Participate across the software development lifecycle, write automated tests, monitor production deployments, debug complex systems, review code, collaborate with security and infrastructure teams, and mentor colleagues. The role involves Rust and Go development, databases, Docker, Kubernetes, and maintaining reliable, fault-tolerant systems at scale, with possible on-call responsibilities.

Build and troubleshoot secure, production-ready AI/ML and agentic software for JPMorganChase’s LLM Suite platform. Develop GenAI services using Azure OpenAI, AWS Bedrock, public cloud architecture, and modern agentic frameworks. Design microservices and APIs, integrate algorithms with existing systems, support operational stability, and collaborate with senior engineers on architecture and implementation. Explore agent-to-agent communication, Model Context Protocol, and agentic orchestration patterns.

Design, build, test, and maintain Java and Kotlin backend services, REST APIs, payment orchestration systems, and event-driven financial platforms. Optimize PostgreSQL databases and payment services for scale, reliability, and cost. Participate in code reviews, automated testing, incident response, cross-functional delivery, and security practices for sensitive financial data.

Design, develop and maintain Kotlin-based Android applications; drive architectural improvements, migrate to MVVM and Hilt, modularise for white-labelling, write tests, support CI/CD, integrate Google Pay/Assistant/widgets, and collaborate with cross-functional teams to ensure performance and reliability.

Software Engineer Interns design, develop, test, troubleshoot, and document secure software solutions. They collaborate with engineers, managers, and stakeholders, apply automation throughout the software development lifecycle, and use approved AI development tools for coding, testing, refactoring, and documentation while validating output quality, security, and correctness. The program includes training, mentorship, networking, and potential full-time opportunities after graduation.

Develop and enhance Java applications, translate complex requirements into technical specifications, and build scalable cloud-native solutions using Spring Boot, Kafka, AWS, and microservices. The role includes implementing architecture patterns, writing comprehensive automated tests, working with relational and non-relational databases, supporting CI/CD, addressing information security and data privacy requirements, and mentoring junior developers.

Build and operate end-to-end product features across a Go backend on Google Cloud Run and React frontend. Develop LLM-powered analysis and recommendations, evaluate nondeterministic outputs, design prompts, and create independent connector services for external data sources. The role includes production ownership, system design, customer feedback, experimentation, code reviews, and collaboration with senior engineers.

Build and improve features for Cloudflare’s global edge web server, focusing on the rules engine and control plane. Design reliable, safe, highly available distributed systems, improve performance, create new systems, and collaborate with platform and product engineering teams. The role involves applying algorithms, data structures, concurrency controls, and practical computer science to large-scale web infrastructure.

Develop and maintain Cloudflare’s Rust-based Front Line web server, which processes over 150 million HTTP requests per second. Improve edge availability, safety, reliability, security, deployment frequency, automation, observability, and performance. Collaborate across engineering and product teams to design solutions for large-scale distributed systems and drive continuous operational improvement.

Hands-on senior software engineer responsible for designing, developing, testing, deploying, monitoring, and supporting BlackRock’s cloud-native Private Markets platform. The role involves Java backend and React/TypeScript frontend development, scalable APIs and services, event-driven workflows, architecture evolution, CI/CD, incident investigation, and secure data-centric systems. The engineer will use AI-powered development tools and integrate AI capabilities into products while collaborating with engineering, product, architecture, and QA teams.

Design, build, test, and maintain scalable full-stack web applications and integrations using Java, Python, and React. Implement AI-enabled features, event-driven data pipelines, and marketing integrations (CDP/CRM/CMS). Improve code quality via AI-assisted tools, CI/CD, observability, and security/compliance best practices while collaborating with product, marketing, and partners.

Lead design, development, and delivery of risk, pricing, trade capture, and commodities operations software. Collaborate with trading, quant, sales, and middle office to produce secure, high-quality production code, provide technical guidance, and drive product and architecture decisions. Promote cross-team collaboration, firmwide engineering practices, and mentor engineers to deliver scalable solutions.

Build and maintain DevSecOps tooling for AWS cloud environments, including threat modeling, security guardrails, policy-as-code, vulnerability analysis, compliance reporting, and runtime security visibility. Develop automation for security findings and software supply chain controls, support audits and incident response, and provide remediation guidance to engineering teams. Collaborate with platform engineers, product squads, risk, and governance teams while using authorized AI-assisted development tools securely and validating generated outputs.

Design, implement, and operate Cloudflare’s S3-compatible R2 API gateway at global scale. Responsibilities include authentication, authorization, routing, rate limiting, error handling, distributed systems development, reliability and observability improvements, deployment, monitoring, incident response, and cross-team coordination. The role also involves on-call participation, postmortems, compatibility with the S3 API, and extensive use of AI tools for development and operations.

Design, build, and operate high-performance platform services for SailPoint’s Identity Security Cloud. Develop Golang microservices, Angular and TypeScript features, automated tests, and AWS-based distributed architectures. Collaborate with data scientists on AI-driven capabilities, optimize low-latency services and databases, improve CI/CD pipelines, participate in a 24x7 on-call rotation, and contribute to technical design, mentoring, and platform strategy.

As a Software Engineer at Legora, you will build and implement features for a web platform, maintaining code quality and mentoring junior colleagues.

11-week internship building high-performance research platforms and trading tools. Work in small teams on distributed systems, NLP/ML applications, and web frameworks while collaborating with senior engineers.

Design, implement, and maintain observability features: large-scale data ingestion/storage/processing, visualization tools, frontend integrations, reliability via testing, and collaborate across product, design, and infrastructure while engaging with open-source communities and user feedback.

Build secure, scalable AI/ML platforms and applications to productionize research. Collaborate with AI researchers and data scientists, implement CI/CD and IaC, support experimentation environments, automate remediation, mentor junior engineers, and promote secure, responsible AI development practices.