5 software developer jobs found

Mobile Software Engineers, iOS, Android & Cross-Platform Developers. Remote AI Project   We are seeking experienced Mobile Software Engineers, iOS Developers, Android Developers, React Engineers, and Flutter Developers to contribute to a remote AI project focused on advanced mobile software engineering.   You will create challenging coding environments that test an AI model’s ability to debug mobile applications, build non-trivial features, refactor complex code, manage application state and lifecycle, and optimize performance.   What You’ll Do   Create realistic and technically challenging mobile software engineering tasks using real or representative codebases. Design problems involving bug fixing, feature development, application state, lifecycle behavior, asynchronous workflows, refactoring, and performance optimization. Build tasks for React, Flutter, iOS, or Android applications based on your...

Software Engineer (C#) — Internal Tooling (AI Infrastructure) About The Role What if your C# expertise could directly shape the infrastructure powering the next generation of AI? We're looking for experienced full-stack C# engineers to build and optimize the data pipelines, annotation systems, and evaluation tooling that leading AI labs depend on every day. This isn't maintenance work or low-stakes ticket-churning. You'll be working on real production systems at the frontier of AI development — the kind of infrastructure that determines how AI models are trained, measured, and improved. Organization: Alignerr Type: Hourly Contract Location: Remote Commitment: 20–40 hours/week What You'll Do Design, build, and optimize high-performance C# systems supporting large-scale AI data pipelines and evaluation workflows Develop full-stack tooling and backend services for data annotation, validation, and quality control at scale...

Contract Lead .Net Developer - Optimizely Description We are recruiting for a Contract Lead .NET Developer with strong experience in modern .NET/C# architectures and hands-on Optimizely experience, stepping in to spearhead the build of greenfield digital platforms for one of our key enterprise clients. Role Overview Role:  Lead .NET Developer (Associate / Contract) Rate:  £550 – £600 per day Location:  Primarily remote (occasional travel to client sites in London / Watford) Duration:  6-month initial contract (strong potential for extension) Start Date:  ASAP Who We Are: AND Digital are a tech company focused on accelerating digital delivery and dedicated to closing the digital skills gap. We’ve been helping organisations build better digital products and stronger digital teams since 2014.We believe our work should always make a remarkable impact for our clients. We do this through...

Contract: Outside IR35 Commitment: 2-3 days a week Additional days: £280 per day, subject to prior written approval Location: UK-based, remote Start date: 20 November 2026 Term: Initial MVP contract with the possibility of extension   ABOUT VAULTIER Vaultier is building a private collection-management platform for wealthy collectors and the people authorised to manage their collections. The product will hold sensitive information about valuable pieces, including ownership, value, location, documents, actions and access permissions.   THE ROLE Vaultier is looking for an independent QA engineer to test its responsive web MVP.   You will review completed features against approved requirements, identify defects and risks, and provide clear evidence of whether each release is ready. You will work independently from the full-stack engineer while collaborating with Product, UX and Development.  ...

Software Engineer - Java and C++ (contract outside of IR35)   Details: 3-month (rolling) contract outside of IR35 Rate: £500 - £600 per day Location: Remote Security: BPSS   About the role: TwinStream software engineers (Java) develop components of a cross-domain security system within an agile development team. They are involved in the entire software development lifecycle, which includes understanding the need for change, software design, coding, testing, delivery, and support. A TwinStream software engineer is not just a coder; they comprehend the business and domain challenges and utilize their technical skills to address those issues.   Responsibilities: Understand high-level requirements and collaborate to find solutions Investigate technologies to gain a deep understanding of their applicability Develop high-quality code Problem-solving deeply technical issues Build tests at all stages...