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3 Contract API jobs in Collingtree + 20 miles
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C# Engineer (Blazor Experience)
C# Engineer (Blazor Experience)
Hays
MK1, Milton Keynes
£350.0 - £400.0 per day + £350 - 400 per day Outside IR35
Role OverviewOur client based in Milton Keynes is looking for a passionate and skilled C# Engineer with proven experience in Blazor to join their growing development team. This is a fantastic opportunity to work on high-performance web applications in a collaborative and innovative environment. You'll be working closely with a talented team of developers, designers, and product managers to deliver cutting-edge solutions that drive real value. Responsibilities * Build and maintain interactive, scalable web applications using Blazor and .NET technologies. * Collaborate with cross-functional teams to define, design, and implement new features. * Ensure code quality through code reviews, unit testing, and adherence to best practices. * Troubleshoot and resolve issues across the full stack. * Contribute to technical discussions and share knowledge with the wider team.
Role OverviewOur client based in Milton Keynes is looking for a passionate and skilled C# Engineer with proven experience in Blazor to join their growing development team. This is a fantastic opportunity to work on high-performance web applications in a collaborative and innovative environment. You'll be working closely with a talented team of developers, designers, and product managers to deliver cutting-edge solutions that drive real value. Responsibilities * Build and maintain interactive, scalable web applications using Blazor and .NET technologies. * Collaborate with cross-functional teams to define, design, and implement new features. * Ensure code quality through code reviews, unit testing, and adherence to best practices. * Troubleshoot and resolve issues across the full stack. * Contribute to technical discussions and share knowledge with the wider team.
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Lead the design and development of automated UI and API testing solutions using SpecFlow and Playwright, written in C# .NET.
Lead the design and development of automated UI and API testing solutions using SpecFlow and Playwright, written in C# .NET.
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2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
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70 exact matches jobs are outside your preferred location
Up to £515 per day (Inside IR35) Remote / must be UK based - 12 months - My client is an instantly recognisable consultancy who seek a Senior Integration Developer, with active SC clearance and experience in Microsoft Dynamics 365 Finance, to lead the design and implementation of robust, secure, and scalable integrations for an end client. * Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. * Active Security Clearance (SC) * Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). * Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. * Experience with ETL processes, error handling, idempotency, and throttling. * Strong understanding of secure data handling, encryption, and compliance standards. * Familiarity with monitoring tools like Application Insights and Log Analytics.
Up to £515 per day (Inside IR35) Remote / must be UK based - 12 months - My client is an instantly recognisable consultancy who seek a Senior Integration Developer, with active SC clearance and experience in Microsoft Dynamics 365 Finance, to lead the design and implementation of robust, secure, and scalable integrations for an end client. * Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. * Active Security Clearance (SC) * Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). * Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. * Experience with ETL processes, error handling, idempotency, and throttling. * Strong understanding of secure data handling, encryption, and compliance standards. * Familiarity with monitoring tools like Application Insights and Log Analytics.
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Up to £515 per day (Inside IR35) Remote / must be UK based - 3 months initially (open to extension) My client is an instantly recognisable consultancy who seek a - to lead the design and implementation of robust, secure, and scalable integrations for an end client. * Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. * Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). * Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. * Experience with ETL processes, error handling, idempotency, and throttling. * Strong understanding of secure data handling, encryption, and compliance standards. * Familiarity with monitoring tools like Application Insights and Log Analytics. * Industry experience within financial services * Experience with Microsoft Power Platform (Power Automate, Powe
Up to £515 per day (Inside IR35) Remote / must be UK based - 3 months initially (open to extension) My client is an instantly recognisable consultancy who seek a - to lead the design and implementation of robust, secure, and scalable integrations for an end client. * Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. * Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). * Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. * Experience with ETL processes, error handling, idempotency, and throttling. * Strong understanding of secure data handling, encryption, and compliance standards. * Familiarity with monitoring tools like Application Insights and Log Analytics. * Industry experience within financial services * Experience with Microsoft Power Platform (Power Automate, Powe
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D365 Senior Developer - D365 Finance, APIS, Azure
D365 Senior Developer - D365 Finance, APIS, Azure
Hays
London
£500.0 - £515.0 per day + up to £515 pd (InsideIR35)
Up to £515 per day (Inside IR35) Remote / must be UK based - 12 months - We're looking for an experienced D365 Finance & Operations Developer to lead the development of custom journal processing extensions. This role suits someone with strong X++ skills and a deep understanding of D365 Finance, especially in high-volume, cross-functional environments. * Experience in D365 F&O development (X++, data entities, extensions). * Experience with general ledger, journals, financial dimensions, and intercompany transactions. * Strong knowledge of Visual Studio, LCS, Azure DevOps, and CI/CD pipelines. * Proficient in Power BI: report creation, configuration, and export. * Skilled in workflows, security roles, SSRS, and unit testing (SysTest). * Familiar with DMF, OData, batch processing, and error handling. * Ability to optimize performance for high-volume transactions.
Up to £515 per day (Inside IR35) Remote / must be UK based - 12 months - We're looking for an experienced D365 Finance & Operations Developer to lead the development of custom journal processing extensions. This role suits someone with strong X++ skills and a deep understanding of D365 Finance, especially in high-volume, cross-functional environments. * Experience in D365 F&O development (X++, data entities, extensions). * Experience with general ledger, journals, financial dimensions, and intercompany transactions. * Strong knowledge of Visual Studio, LCS, Azure DevOps, and CI/CD pipelines. * Proficient in Power BI: report creation, configuration, and export. * Skilled in workflows, security roles, SSRS, and unit testing (SysTest). * Familiar with DMF, OData, batch processing, and error handling. * Ability to optimize performance for high-volume transactions.
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D365 Senior Developer - D365 Finance, APIS, Azure
D365 Senior Developer - D365 Finance, APIS, Azure
Hays
London
£500.0 - £515.0 per day + up to £515 pd (InsideIR35)
Up to £515 per day (Inside IR35) Remote / must be UK based - 12 months - We're looking for an experienced D365 Finance & Operations Developer to lead the development of custom journal processing extensions. This role suits someone with strong X++ skills and a deep understanding of D365 Finance, especially in high-volume, cross-functional environments. * 5+ years in D365 F&O development (X++, data entities, extensions). * Experience with general ledger, journals, financial dimensions, and intercompany transactions. * Strong knowledge of Visual Studio, LCS, Azure DevOps, and CI/CD pipelines. * Proficient in Power BI: report creation, configuration, and export. * Skilled in workflows, security roles, SSRS, and unit testing (SysTest). * Familiar with DMF, OData, batch processing, and error handling. * Ability to optimize performance for high-volume transactions.
Up to £515 per day (Inside IR35) Remote / must be UK based - 12 months - We're looking for an experienced D365 Finance & Operations Developer to lead the development of custom journal processing extensions. This role suits someone with strong X++ skills and a deep understanding of D365 Finance, especially in high-volume, cross-functional environments. * 5+ years in D365 F&O development (X++, data entities, extensions). * Experience with general ledger, journals, financial dimensions, and intercompany transactions. * Strong knowledge of Visual Studio, LCS, Azure DevOps, and CI/CD pipelines. * Proficient in Power BI: report creation, configuration, and export. * Skilled in workflows, security roles, SSRS, and unit testing (SysTest). * Familiar with DMF, OData, batch processing, and error handling. * Ability to optimize performance for high-volume transactions.
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Familiar with Apigee for API management
Familiar with Apigee for API management
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Expertise in Cisco Meraki and Cisco SASE solutions are essential, and API DevNet skills are highly advantageous. * API DevNet skills are highly beneficial.
Expertise in Cisco Meraki and Cisco SASE solutions are essential, and API DevNet skills are highly advantageous. * API DevNet skills are highly beneficial.
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Salesforce Revenue Cloud Developer - Location: Remote - iO Associates is looking for a skilled Sales force Revenue Cloud Developer to join our client's growing team. In this role, you will play a key part in designing, building, and optimising Revenue Cloud solutions (CPQ & Billing) to support complex sales processes and streamline quote-to-cash operations. You will collaborate with architects, business stakeholders, and cross-functional teams to deliver scalable, high-quality Salesforce solutions. Key Responsibilities * Develop, customise, and enhance Salesforce Revenue Cloud (CPQ & Billing) features. * Design and implement end-to-end quote-to-cash solutions, including pricing, quoting, approvals, order management, and billing. * Build and maintain integrations between Revenue Cloud and other Salesforce clouds (Sales Cloud, Service Cloud) and third-party systems.
Salesforce Revenue Cloud Developer - Location: Remote - iO Associates is looking for a skilled Sales force Revenue Cloud Developer to join our client's growing team. In this role, you will play a key part in designing, building, and optimising Revenue Cloud solutions (CPQ & Billing) to support complex sales processes and streamline quote-to-cash operations. You will collaborate with architects, business stakeholders, and cross-functional teams to deliver scalable, high-quality Salesforce solutions. Key Responsibilities * Develop, customise, and enhance Salesforce Revenue Cloud (CPQ & Billing) features. * Design and implement end-to-end quote-to-cash solutions, including pricing, quoting, approvals, order management, and billing. * Build and maintain integrations between Revenue Cloud and other Salesforce clouds (Sales Cloud, Service Cloud) and third-party systems.
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Strong experience with RESTful API integrations * Familiarity with authentication protocols (OAuth2, API keys)
Strong experience with RESTful API integrations * Familiarity with authentication protocols (OAuth2, API keys)
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Hands-on experience with Flask or FastAPI for API development.
Hands-on experience with Flask or FastAPI for API development.
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Strong application security knowledge (OWASP Top 10, API security).
Strong application security knowledge (OWASP Top 10, API security).
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Strong application security knowledge (OWASP Top 10, API security).
Strong application security knowledge (OWASP Top 10, API security).
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This role involves architecting cloud-native solutions using Azure Cosmos DB (SQL API and Mongo API), implementing effective partitioning strategies, indexing, and consistency models to support real-time financial data processing. * Architect and develop cloud-native applications using Azure Cosmos DB (SQL API, Mongo API)
This role involves architecting cloud-native solutions using Azure Cosmos DB (SQL API and Mongo API), implementing effective partitioning strategies, indexing, and consistency models to support real-time financial data processing. * Architect and develop cloud-native applications using Azure Cosmos DB (SQL API, Mongo API)
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D365 Finance Senior Integration Developer (remote)
D365 Finance Senior Integration Developer (remote)
Hays
London
£500.0 - £550.0 per day + c£510 per day (inside IR35)
We are currently seeking a D365 Senior Integration Developer (finance) to design and implement integrations using D365 API's (e.g. Data Management Package, REST API, OData) You will develop automation processes for data transformation, upload, import and error handling in batch or near real-time modes. Proficiency in tools like Postman, Azure Logic Apps, and scripting (e.g., C#, PowerShell) for API orchestration, along with ETL processes.
We are currently seeking a D365 Senior Integration Developer (finance) to design and implement integrations using D365 API's (e.g. Data Management Package, REST API, OData) You will develop automation processes for data transformation, upload, import and error handling in batch or near real-time modes. Proficiency in tools like Postman, Azure Logic Apps, and scripting (e.g., C#, PowerShell) for API orchestration, along with ETL processes.
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Role/Job Title: Solution Architect - Work Location: Warwick, UK (3 days) Role Overview - The Solution Architect will be responsible for creating a business case to identify and select the most appropriate options for a Software as a Service (SaaS) application, whether available in the market or developed in-house. This role involves gathering and analysing requirements, designing architectural solutions, evaluating proposals through Request for Proposals (RFP), ensuring Non-Functional Requirements (NFR) are met, addressing security and IT controls, creating architectural artefacts, and leading the technical aspects of the SaaS deployment across multiple domains and Identity Provider (IdP) Single Sign-On (SSO) integrations. Additionally, the architect will understand business functional requirements to influence option selection effectively.
Role/Job Title: Solution Architect - Work Location: Warwick, UK (3 days) Role Overview - The Solution Architect will be responsible for creating a business case to identify and select the most appropriate options for a Software as a Service (SaaS) application, whether available in the market or developed in-house. This role involves gathering and analysing requirements, designing architectural solutions, evaluating proposals through Request for Proposals (RFP), ensuring Non-Functional Requirements (NFR) are met, addressing security and IT controls, creating architectural artefacts, and leading the technical aspects of the SaaS deployment across multiple domains and Identity Provider (IdP) Single Sign-On (SSO) integrations. Additionally, the architect will understand business functional requirements to influence option selection effectively.
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API Integration Experience:Proven track record of consuming and building APIs for data exchange * Strong understanding of API development and integration (REST, GraphQL)
API Integration Experience:Proven track record of consuming and building APIs for data exchange * Strong understanding of API development and integration (REST, GraphQL)
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I am currently working with a London-based Tier 1 investment bank who are actively seeking a Python Developer on a long-term contract basis. What you'll need to succeed * Strong Python programming experience within Financial Services - Mandatory * Good understanding of quantitative finance * Good experience developing and optimising Python-based calculators and models. * Strong experience developing high-performance APIs using Flask or FastAPI. * Expertise in Pandas, NumPy and other computing libraries. * Strong experience liaising with front-office stakeholders - What you'll get in return * Initial 6-month contract with extensions * Up to £700pd umbrella * London-based hybrid working - What you need to do now - If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.
I am currently working with a London-based Tier 1 investment bank who are actively seeking a Python Developer on a long-term contract basis. What you'll need to succeed * Strong Python programming experience within Financial Services - Mandatory * Good understanding of quantitative finance * Good experience developing and optimising Python-based calculators and models. * Strong experience developing high-performance APIs using Flask or FastAPI. * Expertise in Pandas, NumPy and other computing libraries. * Strong experience liaising with front-office stakeholders - What you'll get in return * Initial 6-month contract with extensions * Up to £700pd umbrella * London-based hybrid working - What you need to do now - If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.
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Location: Hybrid - 3 days per week onsite in Victoria, London (non-negotiable) Start Date: October - Contract Length: Until end of December (with likely extension) Day Rate: Up to £450/day (outside IR35, negotiable) A leading digital consultancy is seeking a highly skilled Senior Front-End Developer to join a blended delivery team working on a high-profile media application. This role offers the opportunity to collaborate closely with consultancy colleagues, client stakeholders, and nearshore partners to deliver an exceptional digital experience for end users. Key Responsibilities * Develop high-quality, performant, and scalable front-end solutions using Next.js, React, and TypeScript * Implement animations using Motion to create smooth, engaging user experiences * Ensure front-end performance, accessibility, and SEO best practices are met
Location: Hybrid - 3 days per week onsite in Victoria, London (non-negotiable) Start Date: October - Contract Length: Until end of December (with likely extension) Day Rate: Up to £450/day (outside IR35, negotiable) A leading digital consultancy is seeking a highly skilled Senior Front-End Developer to join a blended delivery team working on a high-profile media application. This role offers the opportunity to collaborate closely with consultancy colleagues, client stakeholders, and nearshore partners to deliver an exceptional digital experience for end users. Key Responsibilities * Develop high-quality, performant, and scalable front-end solutions using Next.js, React, and TypeScript * Implement animations using Motion to create smooth, engaging user experiences * Ensure front-end performance, accessibility, and SEO best practices are met
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I am currently working with a London-based Tier 1 investment bank who are actively seeking a Python Developer on a long-term contract basis. What you'll need to succeed * Strong Python programming experience within Financial Services - Mandatory * Good understanding of quantitative finance * Good experience developing and optimising Python-based calculators and models. * Strong experience developing high-performance APIs using Flask or FastAPI. * Expertise in Pandas, NumPy and other computing libraries. * Strong experience liaising with front-office stakeholders - What you'll get in return * Initial 6-month contract with extensions * Up to £700pd umbrella * London-based hybrid working - What you need to do nowIf you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.
I am currently working with a London-based Tier 1 investment bank who are actively seeking a Python Developer on a long-term contract basis. What you'll need to succeed * Strong Python programming experience within Financial Services - Mandatory * Good understanding of quantitative finance * Good experience developing and optimising Python-based calculators and models. * Strong experience developing high-performance APIs using Flask or FastAPI. * Expertise in Pandas, NumPy and other computing libraries. * Strong experience liaising with front-office stakeholders - What you'll get in return * Initial 6-month contract with extensions * Up to £700pd umbrella * London-based hybrid working - What you need to do nowIf you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.
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London - hybrid - 8 Months+ Inside IR35- Umbrella only * Proficient with React Native and Expo open source modules (bare workflow) * Strong React fundamentals: hooks, context, state management * React Navigation, app routing JavaScript & TypeScript * Advanced JavaScript (ES6+) and TypeScript * Type safety and maintainability for large-scale projects * Native Platform Integration Swift (iOS) and Kotlin (Android) for custom native modules * Native module integration in Expo * React Native projects * State Management & Storage Redux for complex state management MMKV for high-performance key-value storage * Architecture & APIs System Design * Deep expertise in complex React Native architectures and patterns * Subject matter expert for technical problem-solving and architectural guidance * Designs solutions for the most challenging technical requirements GraphQL Integratio
London - hybrid - 8 Months+ Inside IR35- Umbrella only * Proficient with React Native and Expo open source modules (bare workflow) * Strong React fundamentals: hooks, context, state management * React Navigation, app routing JavaScript & TypeScript * Advanced JavaScript (ES6+) and TypeScript * Type safety and maintainability for large-scale projects * Native Platform Integration Swift (iOS) and Kotlin (Android) for custom native modules * Native module integration in Expo * React Native projects * State Management & Storage Redux for complex state management MMKV for high-performance key-value storage * Architecture & APIs System Design * Deep expertise in complex React Native architectures and patterns * Subject matter expert for technical problem-solving and architectural guidance * Designs solutions for the most challenging technical requirements GraphQL Integratio
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We're seeking a hands-on Data & Analytics Engineer with deep technical expertise across modern data platforms and analytics tooling. This role offers broad ownership-from platform architecture to dashboard delivery-and is ideal for someone who thrives in end-to-end data environments. This role does have on-site requirements and will initally be a 6 month contract. Core Responsibilities * Architect relational and Lakehouse schemas using Fabric, Databricks, or equivalent platforms * Rebuild legacy SSAS cubes into scalable Lakehouse models * Design medallion architectures and govern data pipelines * Build and orchestrate ETL/ELT flows across ERP, WMS, ecommerce, IoT, and APIs * Deliver performant, insightful dashboards using Power BI or similar tools * Prepare curated datasets for AI/ML workflows and automation
We're seeking a hands-on Data & Analytics Engineer with deep technical expertise across modern data platforms and analytics tooling. This role offers broad ownership-from platform architecture to dashboard delivery-and is ideal for someone who thrives in end-to-end data environments. This role does have on-site requirements and will initally be a 6 month contract. Core Responsibilities * Architect relational and Lakehouse schemas using Fabric, Databricks, or equivalent platforms * Rebuild legacy SSAS cubes into scalable Lakehouse models * Design medallion architectures and govern data pipelines * Build and orchestrate ETL/ELT flows across ERP, WMS, ecommerce, IoT, and APIs * Deliver performant, insightful dashboards using Power BI or similar tools * Prepare curated datasets for AI/ML workflows and automation
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Job Title: Primavera Technical Consultant * Mode: Hybrid * Onsite Requirement: 3 days per week * Location: Coventry, UK * 3+ implementation project experience * Experience in UK water and energy industries will be an added advantage * Design, develop, and support integrations between Primavera (Unifier, OPC) and enterprise systems (ERP, EDMS, MS Project, P6, etc.) * Develop and maintain REST/SOAP-based APIs, web services, and middleware components for seamless data exchange * Provide regular status reporting to the program manager * Prepare discovery documentation, take notes, process map, and get validation from customer stakeholders * Document Primavera technical requirements, design, and deliverables * 3+ end-to-end implementation project experience in integrated Oracle Unifier and Primavera Cloud
Job Title: Primavera Technical Consultant * Mode: Hybrid * Onsite Requirement: 3 days per week * Location: Coventry, UK * 3+ implementation project experience * Experience in UK water and energy industries will be an added advantage * Design, develop, and support integrations between Primavera (Unifier, OPC) and enterprise systems (ERP, EDMS, MS Project, P6, etc.) * Develop and maintain REST/SOAP-based APIs, web services, and middleware components for seamless data exchange * Provide regular status reporting to the program manager * Prepare discovery documentation, take notes, process map, and get validation from customer stakeholders * Document Primavera technical requirements, design, and deliverables * 3+ end-to-end implementation project experience in integrated Oracle Unifier and Primavera Cloud
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New Senior Data Engineer Contract Roles We have multiple new Senior Data Engineer Contract roles for a London based financial services client of ours. This would be working on a greenfield project in a new team building out a digital platform. This is outside IR35, 1-2 days per week onsite in London and initial 6 month contract and an immediate start. The ideal candidate will be a data engineer from a software engineering background with machine learning experience. The rate available for this position is: £550-575pd * ETL / Data Pipelines / Data Integration * Python & Java (for building data pipelines & APIs) * Snowflake * AWS * Machine Learning * React or Angular Please apply directly or email me your CV on
New Senior Data Engineer Contract Roles We have multiple new Senior Data Engineer Contract roles for a London based financial services client of ours. This would be working on a greenfield project in a new team building out a digital platform. This is outside IR35, 1-2 days per week onsite in London and initial 6 month contract and an immediate start. The ideal candidate will be a data engineer from a software engineering background with machine learning experience. The rate available for this position is: £550-575pd * ETL / Data Pipelines / Data Integration * Python & Java (for building data pipelines & APIs) * Snowflake * AWS * Machine Learning * React or Angular Please apply directly or email me your CV on
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