1 to 25 of 30 Contract API Design Jobs

years of Web application development experience consisting of strong C#, ASP.NET MVC 5, and React. Strong knowledge of Object-Oriented Programming, SOLID principles, common design patterns and RESTful API design and integration (experience with SOAP WebServices and XML/XPat) also required. We are looking … Server, Entity Framework, and React experience desirable to have HTML5, CSS3, JavaScript, jQuery. * Strong knowledge of Object-Oriented Programming, SOLID principles, and common design patterns. * Experienced in RESTful API design and integration; experience with SOAP WebServices and XML/XPath. * Skilled in using IoC containers (Autofac, Ninject ...

Title: AWS API Technical Architect Rate: £575p/d via Umbrella Duration: 3-6 months (flexible on end date) Location: Remote Clearance required: SC (active and used in the last 12 months) Nationality requirement: No dual-nationality restrictions Job Description: We are looking for an AWS API Engineer …/Architect to design secure, scalable, and well-integrated API and microservices architectures across multiple client applications and services. Key responsibilities are broadly expected to include: Design serverless and microservices-based API architectures on AWS Define and apply RESTful API design patterns and integration ...

specialist that provides support to the clients across EMEA, APAC, US and Canada. We have an excellent job opportunity for you. Job Title: AWS API Technical Engineer/Architect- Active SC Duration: 3-6 months (flexible on end date) Location: Remote Rate: 559GBP/Day(Inside IR35) Description … Location We are looking for an AWS API Engineer/Data Architect to design secure, scalable, and well-integrated API and microservices architectures across multiple client applications and services. Key responsibilities are broadly expected to include: * Design serverless and microservices-based API architectures ...

consulting, technology services, and digital transformation, committed to delivering positive change through technology and human collaboration. They are seeking an experienced SC Cleared AWS API Engineer/Architect to design secure, scalable, and well-integrated API and microservices architectures across multiple client applications and services. Key responsibilities … within this role are broadly expected to include: the design of serverless and microservices-based API architectures on AWS. Defining and applying RESTful API design patterns and integration standards. Support system and data integration across distributed services. Assessing and addressing technical debt, recommending pragmatic modernisation approaches. ...

Remote Start date: ASAP Contract length: Initial contract until 30th October 2026 Project context: This project focuses on the strategic rewrite of the existing API layer between the GiT CRM and Website platform. The current architecture has created operational and maintenance challenges, and a full rewrite is required … deliver a scalable, maintainable, and long-term solution. The proposed approach will separate the API into two distinct components: A CRM-facing API responsible for interfacing directly with CRM data and services. A facade layer responsible for interfacing with wider platform services including GiT, GSE, and Apply. This ...

Python (pyspark): Experience with data pipelines and analytics is a plus. Power BI: Familiarity with developing dashboards and data models. Architecture: Knowledge of microservices, API design, and event-driven architectures. DevOps/CI/CD: Experience with Azure DevOps, GitLab, GitHub Actions, or similar tools. Cloud Platforms: Proficient … Azure preferred). Databases: Strong skills in SQL Server, PostgreSQL, or other relational databases. containerisation: Experience with Docker and Kubernetes. Key Responsibilities Design & Develop: Create and maintain full stack applications using React JS and C#.NET Core. Build Services: Develop high-performance backend services and RESTful APIs with a focus ...

engineering discipline, independent problem-solving ability, and a commitment to building robust, scalable systems. You will work across modern cloud-native architectures, contribute to API and microservices development, and help drive best practices across the engineering organisation. Key Responsibilities Design, develop, and maintain high-quality Java applications using … Spring Boot. Build and optimise RESTful APIs and contribute to GraphQL service development. Develop cloud-native solutions using AWS services such as Lambda, API Gateway, DynamoDB, ECS, S3, and others. Contribute to microservices architecture, event-driven systems, and distributed design patterns. Implement CI/CD pipelines using tools ...

looking for an experienced Senior Java Developer to join a high-performing engineering team. You will take a lead role in the design and delivery of complex, enterprise-scale solutions, bringing strong Java, AWS, and API expertise to a programme that is making a real difference to patient … care across the country. KEY RESPONSIBILITIES Lead the design and development of robust, scalable Java-based applications across the programme Build and maintain cloud-native solutions on AWS, applying well-architected principles throughout Design, develop, and test REST APIs to a high standard, ensuring performance, reliability, and security ...

experience, alongside Front End capability with either React or Angular. You'll be working within a modern cloud-native environment focused on scalable services, API development, and secure enterprise applications. Key Responsibilities: Design and develop scalable Back End services using Node.js Build and maintain RESTful APIs and microservices … across distributed systems Key Skills & Experience: Active SC Clearance (essential) Strong Back End development experience with Node.js Commercial experience with React or Angular Strong API development and API design experience Experience building scalable enterprise or cloud-native applications Strong understanding of Agile engineering environments ...

applications. In this role you will Provide expert level technical direction for complex MarTech projects involving AEM, AEP, Adobe Target, and related integrations. Lead design, development, and implementation efforts across multiple platforms. Lead services and direction, provides technical expertise and completes complex development, design, implementation, architecture design … training and experience although a graduate degree is preferred Experience with Java, JavaScript, HTML, CSS, SQL and modern frameworks Familiarity with microservice architecture, API design, and integration patterns Knowledge of AWS services and cloud-based deployment models Strong understanding of CI/CD pipelines (GitHub), OOP/SOLID ...

with CI/CD , microservices , and event-driven architectures is essential, and knowledge of Python (pyspark) for data-driven workflows is advantageous Key Responsibilities Design, develop, and maintain full stack applications using React JS , C#.NET Core , and supporting technologies. Build high-performance backend services, RESTful APIs, and microservices with … calculations, and enterprise-grade BI solutions. Strong understanding of data modeling, performance tuning, and governance in Power BI. Architecture: Strong knowledge of microservices , API design , event-driven architectures , and distributed systems. DevOps/CI/CD: Experience with Azure DevOps, Gitlab, GitHub Actions, or similar. Strong understanding ...

with CI/CD , microservices , and event-driven architectures is essential, and knowledge of Python (pyspark) for data-driven workflows is advantageous Key Responsibilities Design, develop, and maintain full stack applications using React JS , C#.NET Core , and supporting technologies. Build high-performance backend services, RESTful APIs, and microservices with … calculations, and enterprise-grade BI solutions. Strong understanding of data modeling, performance tuning, and governance in Power BI. Architecture: Strong knowledge of microservices , API design , event-driven architectures , and distributed systems. DevOps/CI/CD: Experience with Azure DevOps, Gitlab, GitHub Actions, or similar. Strong understanding ...

Term Contract (Initial 3 Months with possible extension) Role Summary We are seeking a hands-on Solution Architect (78 years experience) to lead solution design and architecture alignment for a multi-system Agentforce and Salesforce implementation within a large enterprise environment.. This is a highly collaborative, client-facing role … systems. Key Responsibilities Define and own end-to-end solution architecture across Salesforce, Data Cloud, and connected enterprise systems Analyze existing client architecture and design target-state architecture aligned to prioritized use cases Create architecture diagrams (logical, physical, integration flows) and document solution designs Design and govern API ...

Role: Senior Web Application Developer (Full-Stack) Specialism(s): eCommerce, ASP.NET MVC 5, C#, React, Migrations, Microsites, Cloud-Native, HTML5/CSS3/JavaScript, API, CI/CD, IoC Containers, Agile Type: Contract, Daily Rate Duration: 3+ Months Location: London Pay Rate: £450 - £525 per day (Inside IR35 … ready environment. Role Requirements * Develop and maintain complex web solutions using ASP.NET MVC 5, C#, and React * Support migration activities, ensuring clean architecture, scalable design, and efficient implementation * Produce secure, maintainable, scalable, and fault-tolerant code following SOLID principles and OO design patterns * Contribute to front-end development ...

delivery of the platform, ensuring the team consistently ships high-quality, production-ready increments. Ensure engineering standards are followed across the team: coding conventions, API design, security practices, and code review processes. Lead estimation, sprint planning, and decomposition of technical work; proactively identify and manage technical risk, dependencies … architecture function, clearly articulating technical constraints, risks, or emerging complexity with architectural implications, supported by evidence and proposed alternatives. Ensure application of secure-by-design principles and validate and refine Figma wireframes. Represent the team's technical work clearly and credibly to non-technical audiences. Define and enforce ...

offered as a remote full-time contract with potential for extension depending on performance and project needs. Project Overview You will contribute to the design and development of a scalable CRM platform used to: Manage customer lifecycle and engagement Store and process customer and organisation data Automate workflows … Support internal operational tools for teams The platform is built using modern TypeScript-based full-stack technologies , microservices architecture, and cloud infrastructure. Key Responsibilities Design, develop, and maintain CRM platform features across the full stack Build scalable backend services using Node.js and TypeScript Develop modern user interfaces using React ...

looking for two experienced Senior Full Stack Software Engineers to join a high-performing engineering team. You will play a senior role in the design and delivery of modern, scalable web applications, bringing strong full stack expertise across Next.js, TypeScript, and AWS in a programme delivering meaningful impact across … services nationwide. KEY RESPONSIBILITIES Design and build high-quality, scalable full stack applications using Next.js and TypeScript Develop and maintain cloud-native solutions on AWS, following well-architected and security best practices Design, build, and consume RESTful APIs, ensuring performance, reliability, and security standards are met Write ...

looking for two experienced Senior Full Stack Software Engineers to join a high-performing engineering team. You will play a senior role in the design and delivery of modern, scalable web applications, bringing strong full stack expertise across Next.js, TypeScript, and AWS in a programme delivering meaningful impact across … services nationwide. KEY RESPONSIBILITIES Design and build high-quality, scalable full stack applications using Next.js and TypeScript Develop and maintain cloud-native solutions on AWS, following well-architected and security best practices Design, build, and consume RESTful APIs, ensuring performance, reliability, and security standards are met Write ...

This role is designed for engineers who have built and operated large-scale systems end-to-end, not those with superficial exposure or purely design-focused experience. Candidates must have strong experience of Java Full Stack, React, Kubernetes & Docker. Experience in building responsive, component based user interfaces using modern … front end frameworks. Hands on expertise in API design and development (REST/JSON), including versioning and backward compatibility. Experience with UI testing, component testing, and front end build tooling. Experience in CI/CD pipelines, GitOps workflows, A/B testing strategies and also automating the workflows ...

Inside IR35 Duration - 12 months Location: Hybrid 2-3 days per week in Corsham Requirements: Seeking an experienced Full Stack Developer to support the design and delivery of a public facing government website aligned with GDS. This role focuses on building secure, scalable back-end services and accessible, maintainable … team, collaborating closely with front-end and back-end developers, solution architects, content designers and service leads to delivery user centred outcomes. Key responsibilities: Design, build, and maintain full-stack solutions supporting a public-sector digital platform Develop front-end user interfaces that are accessible, responsive, and aligned with ...

generated code for correctness, security, and financial accuracy Desirable, but no essential: Experience with Apache Airflow or similar workflow schedulers REST or GraphQL API design experience Knowledge of fixed income, FX, or derivatives products and associated P&L/risk methodologies ...

month project (Outside IR35.) You will work closely with senior stakeholders and the wider team on both high and low level solution design to provide improvements on existing systems. Provide technical leadership and guidance throughout the project lifecycle, ensuring solutions are scalable, secure, and align with business objectives … complex enterprise solutions. Strong background in software development and system integration. Strong understanding of cloud platforms (AWS, Azure, Google Cloud) Experience with microservices architecture, API design, and integration patterns. Experience with DevOps practices and tools. Please apply now to be considered for this role. ...

Technical Skills Required Data Tools: SQL, Python, Snowflake/Databricks, Tableau/Power BI. Frameworks: Agile/Scrum, MLOps, Data Governance, Metadata Management. Integration: API design, event-driven architecture, and data modeling. Randstad Technologies is acting as an Employment Business in relation to this vacancy. ...

complex risk calculations and high-throughput financial data processing. This is an environment where your technical expertise in Object-Oriented Programming (OOP) and API design will directly impact global operations and regulatory compliance. Key Responsibilities Engineering: Build scalable, testable, and maintainable applications using .NET Core and RESTful APIs … systems. Collaboration: Work alongside Quants, Risk Managers, and Front Office teams to translate business needs into technical reality. Architecture: Participate in high-level technical design and architectural discussions to evolve the platform. Requirements Technical Core: Extensive experience in C#, .NET, SQL Server, and CI/CD pipelines. Domain Expertise ...

Expert Developer: Java experience (Spring Boot, Bazel, Maven) with a focus on distributed services and Kubernetes (GKE). System Designer: Strong skills in API design (gRPC, GraphQL, REST) and relational databases like PostgreSQL. Cloud Proficient: Hands-on experience with GCP services, including BigQuery and Cloud SQL. Security Minded ...