You will build a new Commercial Management platform from scratch using C#/.NET and React, working with AI-native tools like Claude Code and cloud platforms (Azure, AWS, or GCP). The product gives construction businesses real-time visibility into project performance, commercial risk, and profitability. As a founding engineer, you will help take this product from MVP to a fully commercial SaaS platform.

You will work with Python, FastAPI, TypeScript, React, and GCP to design and build services, data models, and APIs. Electric Twin builds a behavioral simulation platform that creates "digital twins" of populations to help organizations predict human behavior.

You'll build features using Svelte/TypeScript on the front end and Python (FastAPI/Django) on the back end, with AWS infrastructure. Tab is a profitable London travel fintech processing real-time payments in 100+ currencies for over 100,000 independent tourism businesses globally.

You'll work with LLMs, chain-of-thought prompting, RAG architectures, multi-agent tool use, Python, and FastAPI. Electric Twin builds synthetic populations for behavioral prediction, simulating human responses for global brands using LLMs.

Work with Angular 19, FastAPI, Python, and Kubernetes. Join a 13-person team shipping high-impact features like product launches and partner integrations for Urban Jungle's insurtech platform serving 300,000+ customers.

You will work with TypeScript, JavaScript, gRPC, Redux, React Native, React, Next.js, and infrastructure like Google Cloud Platform, Kubernetes, and Docker. The role focuses on building new features and integrations for Emma’s mobile and web apps, which help users manage all their finances.

The role involves building and maintaining the company’s platforms,

You'll work with C#, .NET, and Angular as a Lead Full Stack Engineer at an ambitious fintech startup. You'll shape technology and architecture, mentor engineers, and drive the engineering team's growth during an exciting expansion phase.

Lead Full Stack Engineer will work with C#, .Net, and Angular. The role is for an ambitious fintech startup entering a growth phase, where they will influence architecture and mentor engineers. The listing does not specify team size.

Work with Salesforce Lightning, Apex, SOQL, JavaScript, and the Force.com platform, alongside object-oriented programming (Java or C#). Use Git, Jira, IntelliJ, and CI/CD practices, with exposure to Salesforce REST APIs. No specific team or project details are provided.

Java Developer role at Matchtech using Java, Spring Boot, Spring MVC, REST APIs, microservices, SQL, MySQL/PostgreSQL/Oracle, and Git/Bitbucket. The listing focuses on backend or full-stack development requirements but doesn't specify a particular project or team scope.

The role involves C#/.NET, Java, Python, SQL databases, and cloud platforms Azure or AWS. The company is hiring a Software Developer to apply these skills.

Lead Software Developer role using Thermo Fisher SampleManager (v12.1/v21.3), VGL, C#, .NET Framework, SQL, REST/SOAP, XML, Oracle, and PostgreSQL. This position is with an IT consulting company specializing in laboratory information management systems integration and customization.

Build enterprise-grade applications using C#, .NET, Azure, SQL, Angular, MVC, and Docker. Collaborate across teams for design, development, code reviews, and troubleshooting, driving continuous improvement.

You will work with JavaScript, Java, .Net, Python, Git, Mercurial, Perforce, Bamboo, Jenkins, TeamCity and Bitbucket. You will join Hackajob Ltd to collaboratively design and build proof-of-concept or production systems.

Mid-level backend engineer role working with TypeScript/JavaScript, gRPC, Vitess, MySQL, CockroachDB, BigQuery, Redis, Google Cloud Platform, Kubernetes, Docker, Terraform, and monitoring tools like Grafana and Prometheus. You'll build Emma's personal finance app, tackling scaling, data processing, and features like overdraft prediction and subscription clustering, working directly with the CTO.

You will work with TypeScript, JavaScript, React, React Native, Next.js, Redux, and gRPC to build and enhance Emma's mobile and web apps. Emma is a personal-finance management app that helps millions of people manage all their money.

You'll work hands-on with Python, .NET/C#, PostgreSQL, Redshift, AWS, Kubernetes, Terraform, Helm, Argo CD, CI/CD, event-driven services, data pipelines, and machine-learning workflows. The Revenue Intelligence team builds products turning hospitality data into pricing recommendations, demand insights, and reporting for hoteliers. In this hands-on leadership role, you'll set architecture and align multiple teams across Cloudbeds' remote hospitality platform.

Principal Full Stack Engineer at Verisk, a data/analytics/tech firm for insurers, building cloud-native solutions with TypeScript, JavaScript, Angular, Node.js, Azure/AWS, and microservices; also Swift/Vapor, C#/Java, NoSQL, Docker, and Kubernetes. The role leads architecture and engineering standards across multiple products and teams, mentoring engineers on large-scale distributed systems.

You'll work with TypeScript, React.js, Node.js, PostgreSQL, AWS, Terraform, Tailwind CSS, Framer Motion, and Radix UI. You'll build and ship new user-facing features, create AI-powered workflows using LLMs, and develop real-time collaboration features for an AI startup's product.

Develop, maintain, and scale the user portal using JavaScript, TypeScript, React, HTML5, CSS, and REST APIs. The team builds the primary customer interface for an AI security product. No team size is specified.

JPMorgan★3.9 (20k)· London

Java/Springboot, Kotlin, DynamoDB, Aurora/MySQL, AWS, Kubernetes, and Kafka drive the event-driven microservices architecture. The team builds and maintains integrations with digital asset providers and infrastructure (on/off ramp) for J.P. Morgan Personal Investing’s mobile and web apps.

You will work with JavaScript, React, Python, Django, Wagtail, PostgreSQL, Docker, RESTful APIs, Git, and WCAG 2.2 AA standards. You will join a small internal engineering team within a national public body that provides free legal advice, building an in-house capability and contributing to digital services used by over a million people. The development approach is AI-first, with coding assistants integrated into daily workflows.

You will work with Snowflake, SQL, Python/Java/R, REST APIs, JSON/XML, and dbt. The Security Data Analytics team builds data pipelines, models, and automation to turn security signals into analytics-ready data for Information Security teams. This is an individual-contributor backend data engineering role.