Samsara★3.6 (32)· London

Samsara interns work on the Connected Operations Cloud, building backend infrastructure in Golang, web clients with TypeScript/React and GraphQL, mobile with React Native, or embedded software for IoT devices. Projects involve scaling data ingestion, real-time data processing, and creating actionable insights for industries like transportation and agriculture.

Backend engineers use Python, Django, Django-REST-framework, GraphQL (Graphene), Celery, Postgres, and AWS (Packer, Consul, Terraform). They build and maintain the AI-driven energy management platform that powers utilities and optimises renewable generation. The global engineering team is around 1,400 people.

Reward Gateway★4.4 (11)· London

Define and champion the architecture vision for the Engagement Business Unit, working with global architecture and engineering leaders. The role involves leading architecture governance, establishing reusable patterns, and driving the adoption of AI-enabled engineering practices across APIs, microservices, event-driven systems, and data streaming platforms like Kafka. You'll partner with product and engineering teams to deliver scalable cloud-native applications and improve CI/CD pipelines and software delivery practices.

You'll work with TypeScript, Node.js, AWS serverless technologies (Lambda, SQS, EventBridge, API Gateway), MongoDB, Terraform, and GitHub Actions. Seccl is an embedded investment platform helping people invest better, owned by Octopus. You'll design and operate services within cross-functional squads, mentor engineers, and support regulated investment operations in a build-and-run model.

Senior WordPress Developer role: build bespoke WordPress sites and apps using PHP, MySQL, ACF, WooCommerce, Gutenberg, JavaScript (ES6+), SASS/SCSS, Git, Composer, npm, Vite, CI/CD. You’ll also drive AI-assisted development (RAG, MCP, Copilot) and mentor junior developers.

Spotify★4.1 (116)· London

You will work with React, TypeScript, Java, GraphQL, PostgreSQL, and Google Kubernetes Engine (GKE) to build end-to-end solutions. The team builds Groove, a platform that helps thousands of employees plan, coordinate, and deliver work across Spotify.

You will work with Java, Spring Boot (Spring Batch, Spring Cloud), microservices, REST APIs, GraphQL, Azure Cosmos DB, and Confluent Kafka. The team builds AI-driven digital products and services that support employees and HR stakeholders.

Flock★4.0 (6)· London

You'll write production TypeScript on AWS serverless (Lambda, API Gateway, SQS, EventBridge, DynamoDB, S3, CloudWatch) with Terraform/CDK and AI coding agents. As Engineering Lead for the Acquisition team, you'll co-lead with a PM to build features that help fleets find and choose Flock, the connected-vehicle insurer.

Working with Python, SQL, AWS, and APIs like GraphQL, gRPC, and REST, you will productise ML models and manage data workflows in cloud infrastructure. The HealthTech team focuses on ethical AI to improve patient care outcomes.

MAREX★3.2 (6)· London

You will work with C# .NET, JavaScript, TypeScript, React, Node.js, GraphQL, Docker, NoSQL/RDMS databases, and AWS cloud services (ECS/EKS, Lambda, S3, RDS, API Gateway). The team builds and maintains applications to strengthen the company’s market-making capabilities and improve operational efficiency across multiple asset classes and geographies.

Senior Software Engineer designs and maintains backend services and APIs using Java, Python, and Node.js, working with microservices and Spring Boot. The role involves building REST, GraphQL, and SOAP APIs, using relational and NoSQL databases (MySQL, PostgreSQL, Oracle, Redis), and performing cloud-native development in AWS environments. This position supports financial systems and integrations within the leading global business aviation company, Vista.

Build and support scalable enterprise integrations using Workato, APIs, webhooks, REST, SOAP, GraphQL, OAuth, JSON, XML, SQL, JavaScript, Python, and Workato formulas. Integrations span finance, HR, CRM, document management, and analytics platforms. No team size specified.

Work with TypeScript, LangChain, React, GraphQL, Prisma, Temporal, and LlamaIndex to build AI agents that automate high-stakes banking workflows. You will own features end-to-end, architecting a core platform that orchestrates AI, customers, and humans to replace legacy banking bottlenecks.

You will use C#/.NET, Vue.js/React, AWS (SQS, DynamoDB, S3, ECS, Lambda), GitHub Actions, and agentic coding tools to build ERP integrations. Your squad owns the in-product workflows Xe runs inside Sage, Business Central, Dynamics 365 F&O, and Xero, plus the accounting orchestration layer behind them. Xe is rebuilding its cross-border payments platform for corporate and consumer clients.

Design data architectures using AWS, Azure, Kafka, Kinesis, Airflow, NoSQL (MongoDB, DynamoDB, HBase, CosmosDB), GraphQL, Snowflake, DataBricks, SQL, and Python. You will drive the technical direction of Digital Identity & Fraud products at LSEG’s Risk Intelligence division, mentoring team members and aligning architecture with enterprise strategy.

Build scalable backend services using modern Java, TypeScript, React, and Next.js, and design GraphQL/gRPC APIs with PostgreSQL on the Monaco squad. You will create internal products enabling Spotify teams to launch, configure, and manage Premium offers, subscriptions, and pricing.

You'll work with Python (Django/FastAPI), React, TypeScript, PostgreSQL, Azure, Docker, and CI/CD to build customer-facing applications and APIs. The team is part of Oritain, a product origin verification company.

STINT★3.6 (65)via Jack & Jill· London

Build and maintain core systems using Python (Django), Go, Flutter, GraphQL, PostgreSQL on AWS/EKS with DataDog and GitLab. You’ll join a cross-functional product pod powering Stint’s platform that combines a flexible student workforce with AI for hospitality brands.

You will work with Python, SQL, PostgreSQL, Dagster, Git, and CI/CD tools like GitHub Actions, plus Docker, Kubernetes, and REST/GraphQL APIs. This computer-vision startup builds scalable data pipelines and infrastructure to power next-generation products across cloud, AI, and embedded systems.

You will build production data pipelines using dbt, Prefect, Spark on EMR, and AWS services (EventBridge, SQS, Lambda, S3, RDS). The role powers Citywire’s data platform, supporting internal and external products including industry ratings and AI systems. You will work alongside and be mentored by the platform lead.

Senior Engineer will work with React Native, TypeScript, Kotlin, Python, PostgreSQL, AWS, and Terraform to build internal tooling for finance, treasury, and operations. The team supports Taptap Send’s cross-border fintech platform for emerging markets.

State Street★3.4 (3k)· London

You will work with ReactJS, NextJS, TypeScript, NodeJS, Java, Spring Boot, Docker, and AWS to build cloud-native microservices. The role involves modernizing legacy platforms and developing enterprise-scale applications for a financial services firm. You will also mentor junior developers.

Senior Software Engineer works with C#, SQL, .NET Framework 4.8 (ASP.NET MVC5, WebAPI2, EF6), modern .NET 6+, JavaScript/TypeScript, AWS (Lambda, SQS, SNS, RDS) to modernise core C#/SQL systems by extracting legacy business logic, building clean services, and verifying changes via shadow-mode testing.

Mimecast★3.5 (31)· London

Build and maintain full-stack features using C# (.NET) and Java for backend services, React for user interfaces, and a cloud-native stack including AWS (SQS, S3, Bedrock), PostgreSQL, Elasticsearch, Kubernetes, and Grafana. Join a product engineering squad within the Governance, Compliance & Insights pillar that delivers enterprise-scale compliance and archiving for collaboration and email data from platforms like Slack and Microsoft Teams.

Spotify★4.1 (116)· London

As a Fullstack Engineer on the Monaco squad, you'll build end-to-end features with Java 17+, TypeScript, React, Next.js, and PostgreSQL, and develop GraphQL and gRPC APIs for Spotify's subscription business. You will create internal tools that enable teams to launch, configure, and manage Premium offers globally.