Date posted
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Locations
Locations
Salaries
Date posted
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Job types
Were looking for a Principal Python Engineer for a leading and scaling Telco business. This is a chance to combine hands-on coding with technical leadership. * Leading the design and development of robust, scalable Python applications * Setting technical direction and best practices for the engineering team * Collaborating with product managers, engineers, and stakeholders to deliver high-quality solutions * Mentoring and supporting engineers, helping raise the overall technical bar * Driving innovation, architecture decisions, and adoption of modern engineering practices * Extensive experience building complex applications in Python * Strong knowledge of modern frameworks (e.g., Django, FastAPI, Flask) * Experience with cloud platforms (AWS, GCP, or Azure) and scalable architectures * Strong understanding of APIs, microservices, and distributed systems
Were looking for a Principal Python Engineer for a leading and scaling Telco business. This is a chance to combine hands-on coding with technical leadership. * Leading the design and development of robust, scalable Python applications * Setting technical direction and best practices for the engineering team * Collaborating with product managers, engineers, and stakeholders to deliver high-quality solutions * Mentoring and supporting engineers, helping raise the overall technical bar * Driving innovation, architecture decisions, and adoption of modern engineering practices * Extensive experience building complex applications in Python * Strong knowledge of modern frameworks (e.g., Django, FastAPI, Flask) * Experience with cloud platforms (AWS, GCP, or Azure) and scalable architectures * Strong understanding of APIs, microservices, and distributed systems
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Front End Developer
Front End Developer
Sanderson Government and Defence
EC1, City of London
£400 - £500 per day + outside IR35
Details - Clearance required: SC Cleared - IR35 Status: Outside IR35 - Start date: 01/12/2025 - Pay rate: 400-500/d - We are forming a new Data Team to deliver a unified, user-friendly interface that consolidates dashboards, reports, and analytical outputs from across the organisation. This 'single pane of glass' will serve as the central hub for stakeholders to explore data, monitor performance, and make informed decisions. As the Front-End Developer, you will play a pivotal role in designing and building this interface from the ground up. You'll work closely with Data Analysts, Data Scientists, Engineers, and Business Analysts to understand their outputs and translate them into intuitive, dynamic visual experiences. Your work will directly influence how data is consumed and acted upon across the organisation. Responsibilities
Details - Clearance required: SC Cleared - IR35 Status: Outside IR35 - Start date: 01/12/2025 - Pay rate: 400-500/d - We are forming a new Data Team to deliver a unified, user-friendly interface that consolidates dashboards, reports, and analytical outputs from across the organisation. This 'single pane of glass' will serve as the central hub for stakeholders to explore data, monitor performance, and make informed decisions. As the Front-End Developer, you will play a pivotal role in designing and building this interface from the ground up. You'll work closely with Data Analysts, Data Scientists, Engineers, and Business Analysts to understand their outputs and translate them into intuitive, dynamic visual experiences. Your work will directly influence how data is consumed and acted upon across the organisation. Responsibilities
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Day Rate: market rates - Location: Remote - Our Public Sector client is seeking a talented and experienced Front End Developer to join their Digital Delivery team. You will be part of an established agile delivery team working to deliver a new public facing digital authorisation application service, associated back-office database and internal back office system. This is a fast-paced, delivery-focused role where working independently whilst collaborating effectively within the wider team is key. Key Skills * Proven experience of modern JavaScript practices, frameworks and industry standards regarding front-end technologies. Experience of implementing these to produce services which meet Usability, Accessibility and Cyber Security standards. * Proficiency in building front end applications with Angular, NodeJS, Express, Typescript, HTML and CSS.
Day Rate: market rates - Location: Remote - Our Public Sector client is seeking a talented and experienced Front End Developer to join their Digital Delivery team. You will be part of an established agile delivery team working to deliver a new public facing digital authorisation application service, associated back-office database and internal back office system. This is a fast-paced, delivery-focused role where working independently whilst collaborating effectively within the wider team is key. Key Skills * Proven experience of modern JavaScript practices, frameworks and industry standards regarding front-end technologies. Experience of implementing these to produce services which meet Usability, Accessibility and Cyber Security standards. * Proficiency in building front end applications with Angular, NodeJS, Express, Typescript, HTML and CSS.
*outside iR35* What You'll Be Doing * Designing and developing enterprise-grade solutions in an Agile team. * Building and maintaining middleware services using C#, REST APIs, FIX messaging, XML, and Microservices. * Leading architecture discussions, code reviews, and release management. * Collaborating with users and cross-functional teams to define and execute testing strategies. * Mentoring junior developers and contributing to internal best practices. What You Bring * A strong academic background in Computer Science, Engineering, or a related field. * Proven experience in commodities trading, especially with derivatives and platforms like ICE, CME, NASDAQ, Trayport, or TT. * Deep knowledge of C# .NET, RESTful services, and microservice architecture. * Hands-on experience with FIX messaging, XML, AMQ, and ideally nHibernate, OData, and TDD.
*outside iR35* What You'll Be Doing * Designing and developing enterprise-grade solutions in an Agile team. * Building and maintaining middleware services using C#, REST APIs, FIX messaging, XML, and Microservices. * Leading architecture discussions, code reviews, and release management. * Collaborating with users and cross-functional teams to define and execute testing strategies. * Mentoring junior developers and contributing to internal best practices. What You Bring * A strong academic background in Computer Science, Engineering, or a related field. * Proven experience in commodities trading, especially with derivatives and platforms like ICE, CME, NASDAQ, Trayport, or TT. * Deep knowledge of C# .NET, RESTful services, and microservice architecture. * Hands-on experience with FIX messaging, XML, AMQ, and ideally nHibernate, OData, and TDD.
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*outside iR35* What You'll Be Doing * Designing and developing enterprise-grade solutions in an Agile team. * Building and maintaining middleware services using C#, REST APIs, FIX messaging, XML, and Microservices. * Leading architecture discussions, code reviews, and release management. * Collaborating with users and cross-functional teams to define and execute testing strategies. * Mentoring junior developers and contributing to internal best practices. What You Bring * A strong academic background in Computer Science, Engineering, or a related field. * Proven experience in commodities trading, especially with derivatives and platforms like ICE, CME, NASDAQ, Trayport, or TT. * Deep knowledge of C# .NET, RESTful services, and microservice architecture. * Hands-on experience with FIX messaging, XML, AMQ, and ideally nHibernate, OData, and TDD.
*outside iR35* What You'll Be Doing * Designing and developing enterprise-grade solutions in an Agile team. * Building and maintaining middleware services using C#, REST APIs, FIX messaging, XML, and Microservices. * Leading architecture discussions, code reviews, and release management. * Collaborating with users and cross-functional teams to define and execute testing strategies. * Mentoring junior developers and contributing to internal best practices. What You Bring * A strong academic background in Computer Science, Engineering, or a related field. * Proven experience in commodities trading, especially with derivatives and platforms like ICE, CME, NASDAQ, Trayport, or TT. * Deep knowledge of C# .NET, RESTful services, and microservice architecture. * Hands-on experience with FIX messaging, XML, AMQ, and ideally nHibernate, OData, and TDD.
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Lead Salesforce Developer Contract (Outside IR35) Fully Remote - Day Rate: Competitive, open to negotiation - Duration: 6 months+ Working Arrangements: Fully Remote - Interview: 1 Video Call - About the Role - We are seeking an experienced Lead Salesforce Developer for a hands-on leadership role within a fast-growing, innovative financial services environment. You will take ownership of the Salesforce platform, leading a small, talented team and driving technical excellence across the business. What Youll Do * Lead the design, development, and deployment of Salesforce solutions * Collaborate with stakeholders to gather requirements and deliver tailored functionality * Manage and mentor a team of Salesforce professionals (Administrators, Analysts, and Developers) * Ensure data integrity, oversee integrations, and manage complex data models
Lead Salesforce Developer Contract (Outside IR35) Fully Remote - Day Rate: Competitive, open to negotiation - Duration: 6 months+ Working Arrangements: Fully Remote - Interview: 1 Video Call - About the Role - We are seeking an experienced Lead Salesforce Developer for a hands-on leadership role within a fast-growing, innovative financial services environment. You will take ownership of the Salesforce platform, leading a small, talented team and driving technical excellence across the business. What Youll Do * Lead the design, development, and deployment of Salesforce solutions * Collaborate with stakeholders to gather requirements and deliver tailored functionality * Manage and mentor a team of Salesforce professionals (Administrators, Analysts, and Developers) * Ensure data integrity, oversee integrations, and manage complex data models
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Role: Contract Senior Software Engineer - Backend - Rate: C.£550 Outside IR35 Per day - Location: Bradford - Hybrid (2x days on site) Length: 3-6 months - We are working with a growing, forward-thinking technology company dedicated to building scalable, reliable, and high-performing solutions for our customers. As a Senior Software Engineer, you will be responsible for designing, developing, and maintaining server-side applications and services. You'll work closely with cross-functional teams to ensure our systems are performant, secure, and deliver a great user experience. * Design, implement, and maintain backend services, APIs, and databases. * Collaborate with product managers, frontend engineers, and other stakeholders to deliver features end-to-end. * Ensure systems are scalable, reliable, and maintainable. * Write clean, testable, and efficient code following b
Role: Contract Senior Software Engineer - Backend - Rate: C.£550 Outside IR35 Per day - Location: Bradford - Hybrid (2x days on site) Length: 3-6 months - We are working with a growing, forward-thinking technology company dedicated to building scalable, reliable, and high-performing solutions for our customers. As a Senior Software Engineer, you will be responsible for designing, developing, and maintaining server-side applications and services. You'll work closely with cross-functional teams to ensure our systems are performant, secure, and deliver a great user experience. * Design, implement, and maintain backend services, APIs, and databases. * Collaborate with product managers, frontend engineers, and other stakeholders to deliver features end-to-end. * Ensure systems are scalable, reliable, and maintainable. * Write clean, testable, and efficient code following b
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Job Title: Site Reliability Engineer - 12 Month Contract - No Sponsorship Available - Job Description - Our client are hiring a Site Reliability Engineering to join their Site Reliability Engineering group whose main objective is to ensure their services are consistently reliable for their customers. As part of adynamicand self-organizing team, you will have the opportunity to work with modern programming languages and manage software within public cloud environments. Our clients cross-functional teams cover the entire technology stack, from front ends to APIs and databases, providing the resources to build, deploy, and operate their own software. Responsibilities * Support applications in production, including responding to incidents and conducting post-incident reviews. * Apply observability engineering to proactively detect system degradation, understand system sta
Job Title: Site Reliability Engineer - 12 Month Contract - No Sponsorship Available - Job Description - Our client are hiring a Site Reliability Engineering to join their Site Reliability Engineering group whose main objective is to ensure their services are consistently reliable for their customers. As part of adynamicand self-organizing team, you will have the opportunity to work with modern programming languages and manage software within public cloud environments. Our clients cross-functional teams cover the entire technology stack, from front ends to APIs and databases, providing the resources to build, deploy, and operate their own software. Responsibilities * Support applications in production, including responding to incidents and conducting post-incident reviews. * Apply observability engineering to proactively detect system degradation, understand system sta
PREMIUM
Role: Contract Senior Backend Software Engineer - Node.js * Rate: c.£550 Outside IR35 Per day * Location: Leeds - Hybrid (2x days on site) * Length: 3-6 months - We are working with a growing, forward-thinking technology company dedicated to building scalable, reliable, and high-performing solutions for our customers. As a Senior Backend Software Engineer (Node.js), you will be responsible for designing, developing, and maintaining server-side applications and services. You'll work closely with cross-functional teams to ensure our systems are performant, secure, and deliver a great user experience. * Design, implement, and maintain backend services, APIs, and databases. * Collaborate with product managers, frontend engineers, and other stakeholders to deliver features end-to-end. * Ensure systems are scalable, reliable, and maintainable.
Role: Contract Senior Backend Software Engineer - Node.js * Rate: c.£550 Outside IR35 Per day * Location: Leeds - Hybrid (2x days on site) * Length: 3-6 months - We are working with a growing, forward-thinking technology company dedicated to building scalable, reliable, and high-performing solutions for our customers. As a Senior Backend Software Engineer (Node.js), you will be responsible for designing, developing, and maintaining server-side applications and services. You'll work closely with cross-functional teams to ensure our systems are performant, secure, and deliver a great user experience. * Design, implement, and maintain backend services, APIs, and databases. * Collaborate with product managers, frontend engineers, and other stakeholders to deliver features end-to-end. * Ensure systems are scalable, reliable, and maintainable.
Rest API's and Microservice architecture * Restful API Design and development fundamentals * Good SQL knowledge
Rest API's and Microservice architecture * Restful API Design and development fundamentals * Good SQL knowledge
Rest API's and Microservice architecture * Restful API Design and development fundamentals * Good SQL knowledge
Rest API's and Microservice architecture * Restful API Design and development fundamentals * Good SQL knowledge
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Back End: REST Services: REST API, Node.js
Back End: REST Services: REST API, Node.js
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Were seeking a Senior Automation Tester for our public sector client on an initial 5-month contract paying up to £750 per day Inside IR35. You will need to either hold a current Security Clearance (SC) or have the ability to pass it. This role offers remote working and the opportunity to work on innovative projects involving cloud, automation, and AI technologies. Youll be responsible for building and maintaining automated test frameworks, ensuring quality across front-end and back-end systems, and collaborating within a multi-disciplinary Agile team. The successful Senior Automation Tester will possess proven skills working with the following - * C#, Selenium, BDD, MSTest, RestSharp, JavaScript * Azure, Azure DevOps, GitHub * JMeter or Azure Load Test * SQL and test automation from scratch * Agile delivery experience
Were seeking a Senior Automation Tester for our public sector client on an initial 5-month contract paying up to £750 per day Inside IR35. You will need to either hold a current Security Clearance (SC) or have the ability to pass it. This role offers remote working and the opportunity to work on innovative projects involving cloud, automation, and AI technologies. Youll be responsible for building and maintaining automated test frameworks, ensuring quality across front-end and back-end systems, and collaborating within a multi-disciplinary Agile team. The successful Senior Automation Tester will possess proven skills working with the following - * C#, Selenium, BDD, MSTest, RestSharp, JavaScript * Azure, Azure DevOps, GitHub * JMeter or Azure Load Test * SQL and test automation from scratch * Agile delivery experience
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Use Postman for API testing and PowerShell to support automation.
Use Postman for API testing and PowerShell to support automation.
FEATURED
Backend API development + frontend (React/JavaScript) for annotation tools.
Backend API development + frontend (React/JavaScript) for annotation tools.
PREMIUM
Configure and support Axway solutions, including API management and B2B gateway. * Working knowledge of Axway technologies, particularly API management and B2B gateway.
Configure and support Axway solutions, including API management and B2B gateway. * Working knowledge of Axway technologies, particularly API management and B2B gateway.
FEATURED
Experience in using API testing tools like Postman, Insomnia
Experience in using API testing tools like Postman, Insomnia
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REST API development
REST API development
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Senior Security Engineer Defender PurView Sentinel
Senior Security Engineer Defender PurView Sentinel
Invitise Ltd
EC1A, City of London
Up to £500 per day Outside IR35
PowerShell scripting and use of Microsoft Graph API
PowerShell scripting and use of Microsoft Graph API
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Hands-on experience integrating external data sources into internal systems using ETL pipelines and API-driven data exchange.
Hands-on experience integrating external data sources into internal systems using ETL pipelines and API-driven data exchange.
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Experience with API development, web scraping/crawling, and data integration.
Experience with API development, web scraping/crawling, and data integration.
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Designing and executing automated and exploratory tests, particularly in RESTful API environments
Designing and executing automated and exploratory tests, particularly in RESTful API environments
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Sharepoint SPFx Developer (SC CLEARED)
Sharepoint SPFx Developer (SC CLEARED)
Yolk Recruitment
Cardiff, South Glamorgan
£500 - £550 per day + INSIDE IR35
Exposure to SharePoint REST API and modern development practices.
Exposure to SharePoint REST API and modern development practices.
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• Understanding of C#, ASP.NET MVC/Core/Blazor, Web API, and Entity Framework for backend development.
• Understanding of C#, ASP.NET MVC/Core/Blazor, Web API, and Entity Framework for backend development.
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Develop iOS applications (Swift or Objective-C) with RESTful API integrations.
Develop iOS applications (Swift or Objective-C) with RESTful API integrations.
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