10 of 10 Contract API Design Jobs in London

Mulesoft Developer

Hiring Organisation
Experis
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£470 - £520/day
Project Manager, architects, clients & other stakeholders to implement MuleSoft APIs. This role will require knowledge of MuleSoft's Anypoint Studio & Anypoint Platform, which includes Design Center, Runtime Manager, API Manager, Exchange, etc. You must be capable of understanding business requirements, working with stakeholders & implementing complex integrations. Responsibilities: Designing … stakeholders to understand business requirements & translate them into integration solutions. Required Skills: Good experience of: Integration concepts & technologies. MuleSoft Anypoint Platform & components (Mule ESB, API Manager, CloudHub, etc.) Java programming & experience with other programming languages such as XML, JSON, SQL Agile software development methodologies. Cloud-based integration platforms such ...

AI UX Engineer - £350PD - Remote

Hiring Organisation
Tenth Revolution Group
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£300 - £350 per day
Embedding model optimisation and semantic search Context window management and chunking strategies MCP & Tool Integration Model Context Protocol (MCP) implementation LLM tool calling and API design AWS Lambda integration with agents AI Safety & Evaluation Guardrail implementation (hallucination detection, toxicity filtering) Response evaluation frameworks and A/B testing … Advanced Python AWS SDK (boto3) Infrastructure as Code awareness (CloudFormation/Terraform) Git and CI/CD for ML systems UX Engineer - Skills & Requirements Design & Prototyping Advanced Figma skills Wireframing, interactive prototyping, and design systems Responsive web and mobile design Conversational UX Chatbot and conversational interface design ...

AI UX Engineer - £350PD - Remote

Hiring Organisation
Tenth Revolution Group
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£300 - £350/day
Embedding model optimisation and semantic search Context window management and chunking strategies MCP & Tool Integration Model Context Protocol (MCP) implementation LLM tool calling and API design AWS Lambda integration with agents AI Safety & Evaluation Guardrail implementation (hallucination detection, toxicity filtering) Response evaluation frameworks and A/B testing … Advanced Python AWS SDK (boto3) Infrastructure as Code awareness (CloudFormation/Terraform) Git and CI/CD for ML systems UX Engineer - Skills & Requirements Design & Prototyping Advanced Figma skills Wireframing, interactive prototyping, and design systems Responsive web and mobile design Conversational UX Chatbot and conversational interface design ...

Cloud Platform Engineering Lead / DevOps Lead

Hiring Organisation
KBC Technologies UK LTD
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
Hybrid Employer: Global Technology Consultancy Mandatory Skill: Google Kubernetes Engine (GKE) Role Purpose We are seeking a hands-on Cloud Platform Engineering Lead to design, build and operate secure, automated cloud platform capabilities. You will enable product teams to deliver API-first services rapidly and reliably, while balancing … deep technical work with coaching and engineering leadership. Key Responsibilities Design, build, and operate platform capabilities using Infrastructure-as-Code and modern CI/CD . Embed secure-by-design principles from architecture to runtime. Define and manage SLOs/SLIs ; drive observability, performance tuning, and automation. Promote ...

Senior Back End Engineer (.NET/Azure)

Hiring Organisation
E-Solutions IT Services UK Ltd
Location
Central London, London, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
client mortgage journey. We’re looking for an experienced engineer who combines deep .NET and Azure expertise with a collaborative, pragmatic mindset. You’ll design and implement the backend services, APIs, and integrations that power our lending ecosystem, while working closely with front-end, product, and infrastructure teams. This … engineering principles. You’ll be part of a team where architectural thinking, reliability, and craftsmanship are valued just as much as delivery speed. Responsibilities Design, build, and maintain backend services using C# (.NET 8+) and Azure Services. Develop and secure Modern Distributed Systems using Azure Container Apps, integrating with ...

Full-Stack Software Developer

Hiring Organisation
Sanderson
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£520 per day
/17+) Deep Spring Boot & microservices experience Strong AWS skills (EC2, S3, Lambda, IAM) Kafka/event-driven systems SQL optimisation REST/JSON API design Docker proficiency Excellent communication skills Nice to Have JavaScript/React Aurora/RDS If you're proactive, outcomes-driven, and thrive ...

Cloud Solution Architect

Hiring Organisation
International Business Solutions Consulting Limited
Location
Central London, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£500 per day
/SLIs, Terraform and modern CI/CD tools (Azure DevOps, GitHub Actions, Harness, Jenkins, Spinnaker), Containers & orchestration (Kubernetes) and service mesh (eg, Istio), API design & security (REST/OpenAPI, mTLS, authN/Z), Scripting in Bash, PowerShell, or Python, Cloud Expertise (Depth in One, Ready to Cross … Train), Azure: ARM/Bicep, AKS, Application Gateway, API Management, Azure Storage, GCP: GKE, Cloud Load Balancing, Cloud Armor, Istio, Stackdriver, Jenkins, Apigee. The ideal candidate will desirably have strong experience in Harness, HashiCorp Vault, Dynatrace, Docker/buildah, NodeJS for API tooling, Relevant Azure or GCP certifications. ...

Principal Engineer - AI & Data Platforms

Hiring Organisation
ARM
Location
Hounslow, London, Heathrow Villages, United Kingdom
Employment Type
Contract
international organisation in the aviation sector is seeking a Principal Engineer to lead the design and delivery of enterprise-scale engineering solutions supporting AI-driven platforms. This is a senior, hands-on role embedded within a major airline environment, with responsibility for setting technical direction and ensuring solutions scale … role requires consultancy-level technical depth, strong delivery discipline, and the ability to translate complex operational needs into scalable, enterprise-ready solutions. Key Responsibilities Design and own architecture across all layers of the technology stack. Write production-grade code and deliver enterprise-ready solutions at pace. Engineer scalable, modular ...

Principal Engineer - AI & Data Platforms

Hiring Organisation
Advanced Resource Managers Limited
Location
London Heathrow Airport, Hounslow, Middlesex, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
international organisation in the aviation sector is seeking a Principal Engineer to lead the design and delivery of enterprise-scale engineering solutions supporting AI-driven platforms. This is a senior, hands-on role embedded within a major airline environment, with responsibility for setting technical direction and ensuring solutions scale … role requires consultancy-level technical depth, strong delivery discipline, and the ability to translate complex operational needs into scalable, enterprise-ready solutions. Key Responsibilities Design and own architecture across all layers of the technology stack. Write production-grade code and deliver enterprise-ready solutions at pace. Engineer scalable, modular ...

Lead Technical Business Analyst

Hiring Organisation
Lorien
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
mitigate risks associated with migration and system cutover. Core Skills & Experience: Proven expertise in PAS systems and complex data migration projects. Strong knowledge of API design and integration . Advanced data modelling skills for structured and semi-structured data. Proficiency in XML, JSON, and Excel for data handling ...