2 service designer jobs found in Remote

Senior C# Engineer - .Net, Typescript, Lambda, API Gateway, SQS, SNS, Cognito - OUTSIDE IR35 £700 - £800 per day Outside IR35 100% Remote 8-month rolling contract Play a pivotal role in architecting and delivering a major greenfield B2B SaaS platform as a senior, hands-on, Back End C# engineer. Expect serious Back End engineering, high-performance event driven systems, and production grade AWS serverless delivery with an elevated focus on API engineering , identity & access , and secure-by-default service design . You'll also gain hands-on experience with Claude Code and modern agentic development workflows. Role Overview: You'll act as the technical spearhead for a greenfield product build, reporting to the Director of Engineering and working closely with their IAM Technical Lead. In addition to deep Back End C#, API engineering and AWS skills, without being a security expert, you'll ideally have some experience of AWS Cognito, AWS IAM...

Senior C# IAM Developer - Auth0, Identity & Access Control, AWS - OUTSIDE IR35 Contract: 8 months Rate: £700 - £750 OUTSIDE IR35 Location: 100% remote The Role: Working for a global, market leading B2B SaaS business, you'll lead the design and implementation of secure, identity-driven Back End services in a modern C#/.NET environment. Your work will centre on authentication, authorization, and secure event-driven architectures. You'll own our Auth0 integration end-to-end , ensuring our platform meets strict security, compliance, and reliability standards. This is a role for someone who thinks deeply about threat models, defence-in-depth, and secure-by-default engineering. What You'll Do: Architect and implement secure Back End services in C# & .Net Own and evolve our Auth0 identity platform: tenant configuration, flows, hooks, rules, MFA, RBAC Design and maintain token-based security models (OIDC, OAuth2, JWT lifecycle, refresh...