Work with Java/Spring, React, JavaScript/TypeScript, CI/CD pipelines, and distributed systems. You'll join the Account Integrity team building a globally scalable fraud prevention engine to protect customer accounts and prevent financial crime using machine learning and real-time monitoring.

Wise★3.5 (42)· London

You will build and refine financial crime prevention systems using Java (or JVM languages) with Spring, React/JavaScript/TypeScript, and CI/CD pipelines, working 80% backend and 20% frontend. You join the Account Integrity team, which protects Wise’s global platform against fraud via machine learning and real-time transaction monitoring, and you will own projects end-to-end.

You will work with Python, JavaScript, SQL, Kafka, AWS/Azure, PostgreSQL, SQL Server, ClickHouse, and MongoDB. The team designs and delivers real-time, high-performance trading systems for Energy & Commodities, integrating market data, risk, and front-to-back office workflows.

Design, build and deploy production Generative AI applications, LLM-powered solutions and agentic frameworks using Python, LangChain, LangGraph, and OpenShift. You will automate enterprise workflows with intelligent agents, working with PostgreSQL and pgvector as part of Citi’s COO-Technology team building scalable AI for global operations. This is an Individual Contributor Staff Engineer role.

Kingfisher★3.8 (77)· London

Senior Implementation Analyst at Kingfisher, working with GA360, GA4, Google Tag Manager, Tealium iQ, JavaScript, Tealium EventStream, Google Marketing Platform, and Google Cloud. You will design and implement tagging and measurement strategies for digital platforms, partner with Product, Data, and Analytics teams to drive optimisation, and manage tracking across websites and mobile apps.

Deloitte★3.9 (14k)· London

You will use Figma, React, TypeScript, and HTML/CSS to design and front-end code AI-powered agentic experiences, including conversational interfaces and agent-orchestration workflows for clients. The team reimagines how users interact with intelligent platforms, developing trust-centered, multi-step AI interactions. You will manage design workstreams and mentor junior designers and front-end developers.

This role develops generative AI applications using Java, Python, React or Angular, LangChain, LlamaIndex, Hugging Face, Docker, Kubernetes, and AWS, with tools like GitHub Copilot. You will build scalable, AI-powered solutions for Citi’s global finance operations.

ExxonMobil★3.9 (5.7k)· London

Work as a Full Stack Developer using Python, Node.js, React or Angular, SQL/PostgreSQL/MongoDB, and cloud platforms like Azure/AWS/GCP. You will build and maintain scalable web applications, APIs, dashboards, databases, and data pipelines to support ExxonMobil's Global Trading organization's commercial and trading activities.

Work with Python, BeautifulSoup, Selenium, and Apify to scrape dynamic web content, extract data from complex structures, and deliver structured datasets. You will join the Tendem project, driving specialized data scraping workflows for real-world applications. LLM and AI frameworks are also used to enhance automation.

Databricks★3.0 (21)· London

You will work with Python, Scala, JavaScript/TypeScript, Apache Spark, and cloud ecosystems (AWS, Azure, GCP) to build production-grade data and AI solutions on the Databricks platform. In this hands-on role, you lead architecture and design decisions while embedding with customer teams to deliver end-to-end data pipelines, ML/AI models, and user-facing applications.

You will work with front-end technologies (HTML, CSS, JavaScript, React, Angular), back-end (Python, Node.js), databases (SQL, PostgreSQL, MongoDB), and cloud platforms (Azure, AWS, Google Cloud). You will design and maintain applications supporting commodity trading, market analysis, and risk management within ExxonMobil's Global Trading organization.

APL Logistics★3.3 (685)· London

You will work with Microsoft Fabric, Azure, Power Platform, ETL/ELT pipelines, APIs, and relational databases. This Regional Applications Team role manages data requests for EMEA and Americas, delivering data warehouses, pipelines, and automations for supply chain business users.

DNEG★3.1 (36)· London

Design, build, and maintain high-performance RESTful APIs, microservices, and event-driven architectures using Python, PostgreSQL, and Redis. You will integrate generative AI models (ATMAN, VAANI) into production backends for a company operating at the intersection of enterprise Media Asset Management and generative media.

WPP Media★4.0 (1)· London

You will work with Python, SQL, Google Cloud Platform, APIs (Google Ads, DV360, CM360, BigQuery), and prototyping frameworks like Streamlit. As part of the Global Automation Squad within WPP Media's MFG Core Solution, you will identify bottlenecks, rethink processes, and rapidly build Proof of Concepts to automate workflows.

ExxonMobil★3.9 (5.7k)· London

Full stack developer using React or Angular, Python or Node.js, SQL/PostgreSQL/MongoDB, and cloud platforms (Azure, AWS, Google Cloud). Builds and maintains web applications, APIs, and data pipelines supporting commodity trading, market analysis, and risk management within ExxonMobil’s Global Trading organization.

You will work with Python, C#, JavaScript, or Go, and use Gen AI tools like LangGraph, CrewAI, and Hugging Face, alongside ML frameworks such as PyTorch. Sitting in a cross-functional team with product, data, and platform engineers, you will design, build, deploy, and monitor AI systems that scale across the business.

LSEG★3.7 (402)· London

Use tools like Burp Suite, command-line tools, custom scripts, and automation; cloud platforms (AWS, Azure, GCP) and containerized environments (Docker, Kubernetes); and secure coding practices in Java/Springboot, .NET, JavaScript/Node, or Python. The role bridges offensive security and engineering by translating penetration test results into remediation guidance for application and platform teams within LSEG's internal offensive security team.

Viasat★3.8 (382)· London

Work with Python, AWS Lambda, Next.js/React, Terraform, and BigQuery to architect data-driven platforms that drive Viasat's revenue growth by transforming how commercial and customer-facing teams operate. Co-lead development of web portals and cloud applications, integrating AI capabilities like LLMs and agent frameworks. Join an existing Senior Solutions Architect to share technical ownership of the platform ecosystem.

Python, JavaScript, AWS (EC2, S3, RDS, Lambda, VPC, IAM, CloudWatch), and Terraform (EKS), plus Docker and Kubernetes, to build scalable data pipelines and cloud-native platforms for the horse racing division of a sports performance data company. You will lead an engineering team and collaborate with Product, Data Science, UX, and DevOps teams.

Build and scale real-time pipelines, analytics infrastructure, vector databases, and data workflows for an AI assistant that automates property management operations. Work with Python, Apache Spark, Airflow, Kafka, Elasticsearch/OpenSearch, MongoDB, vector databases (Qdrant, Milvus, pgvector), Pandas, and Polars. This is an early data hire with input into architecture decisions.

You will work with Microsoft Azure, Azure Data Factory, Talend, Power BI, Tableau, Python, Java, JavaScript, CI/CD tools, and AI tools like Claude. As part of a data and AI consultancy, you will design modern data platforms and build ETL/ELT pipelines for clients across various industries.

Citi★3.9 (21k)· London

Build and scale AI-powered financial systems using Java, Spring, React/Angular, Python, FastAPI, Docker, and GitHub Copilot within Citi’s global tech environment. You will design generative AI agents, LLM workflows, and RAG pipelines while working on enterprise microservices, mobile, or front-end development. This role is for an individual contributor on an agile team.

Deloitte★3.9 (14k)· London

You will work with Python, JavaScript, Kafka, Azure, Kubernetes, Terraform, Helm, LangChain, PySpark, Databricks, and ADLS. You will design, develop, and deploy production-grade GenAI and machine learning systems for the GenAI team within Deloitte’s Data & AI organisation.

A Senior Full Stack Developer with strong front-end focus, using React, TypeScript/JavaScript, HTML5/CSS3, REST APIs, Python, Git, CI/CD, Docker, and the Databricks platform. You will build next-generation data applications within the Data & Analytics function, moving beyond traditional reporting to interactive Databricks-based solutions. The role defines front-end engineering standards and mentors developers.

Work with NetSuite, Shopify, Snowflake, SQL, dbt, Jitterbit (iPaaS), FTP/SFTP, EDI, SuiteQL, and occasionally JavaScript/HTML. You will build and maintain data pipelines and integrations connecting the company’s ERP, ecommerce, and reporting systems to ensure reliable data flow for finance, supply chain, and operations.