1 to 25 of 27 Contract API Development Jobs

Contract Developer - Node.js development, REST API design, and SIP-based communications Duration: 3 months (Outside IR35) Location: Bracknell/Hybrid Contract Developer with deep expertise in Node.js development, REST API design, and SIP-based communications. This role is crucial for supporting the migration of legacy device management, call control, and configuration workflows to a secure, scalable … Cloud Migration & Refactoring: Analyse existing applications to identify dependencies on on-prem infrastructure and design cloud-native solutions. Refactor services to enhance scalability and reliability in the cloud. Service & API Development: Develop and maintain secure REST APIs for functionalities such as SIP authentication, call control, and real-time data interactions. Real-Time Communication Integration: Implement and maintain robust … Compliance: Oversee the migration of sensitive data to secure cloud storage solutions, ensuring compliance with GDPR and other regulatory standards. Required Skills & Qualifications: Experience: Minimum 3 years of backend development experience using Node.js/Express. Proven track record in building and deploying REST APIs. Experience with SIP/TLS integration and managing real-time communications. Familiarity with cloud services More ❯

Contract Developer - Node.js development, REST API design, and SIP-based communications Duration: 3 months (Outside IR35) Location: Bracknell/Hybrid Contract Developer with deep expertise in Node.js development, REST API design, and SIP-based communications. This role is crucial for supporting the migration of legacy device management, call control, and configuration workflows to a secure, scalable … Cloud Migration & Refactoring: Analyse existing applications to identify dependencies on on-prem infrastructure and design cloud-native solutions. Refactor services to enhance scalability and reliability in the cloud. Service & API Development: Develop and maintain secure REST APIs for functionalities such as SIP authentication, call control, and real-time data interactions. Real-Time Communication Integration: Implement and maintain robust … Compliance: Oversee the migration of sensitive data to secure cloud storage solutions, ensuring compliance with GDPR and other regulatory standards. Required Skills & Qualifications: Experience: Minimum 3 years of backend development experience using Node.js/Express. Proven track record in building and deploying REST APIs. Experience with SIP/TLS integration and managing real-time communications. Familiarity with cloud services More ❯

controls work in London. Role Description: The person needs to have Python (ideally Quartz experience), and exposure to the reconciliation/controls model. The responsibilities will include business analysis, development, affinity with an agile way of working with stakeholders. And work with the development team, across the globe. Skills: Python, SQL, Quartz, React, HTML, CSS, Competencies: At least … years of Python and 1 year of React experience. Hands on experience in Quartz application development Hands on experience in Python , Rest API development and SQL Should have experience on Agile development Should be able to work as L3 support in a Devops environment UI design and development, ideally in React JS. MI and reporting … development using Tableau. Enterprise architecture, DevOps and Agile/Lean delivery techniques. Automated testing, instrumentation and data visualization techniques More ❯

API Develoiper - SC Cleared + 6 month initial contract + Fully remote + £650 to £690 per day + Inside IR35 Key Skills: + Strong background in API Development - ideally Axway + SC Clearance + WebMethods Responsibilities Designing, developing and deploying of Axway policies and containers using Axway Policy Studio v7.7 Working with DevOps toolset for develop … and maintain Automated Testing and Code Deployment Provide Assistance to Axway support team to resolve technical issues Administrating the Axway Environment, using Axway Policy Studio, Axway API Manager, Cassandra and API Gateway for Deployment of Axway Patches, monitor capacity, providing service improvements Liaise with customers to define project requirements, document and design solutions Knowledge of: SFTP HTTPS SSL More ❯

Axway API Developer + 6 month initial contract + Full remote + 650 to 690 per day + SC Cleared role Key Skills: + Axway API Development/Administration + SC Clearance Responsibilities Designing, developing and deploying of Axway policies and containers using Axway Policy Studio v7.7 Working with DevOps toolset for develop and maintain Automated Testing … and Code Deployment Provide Assistance to Axway support team to resolve technical issues Administrating the Axway Environment, using Axway Policy Studio, Axway API Manager, Cassandra and API Gateway for Deployment of Axway Patches, monitor capacity, providing service improvements Liaise with customers to define project requirements, document and design solutions Knowledge of: SFTP HTTPS SSL/TLS oAuth JSON More ❯

Axway API Developer + 6 month initial contract + Full remote + £650 to £690 per day + SC Cleared role Key Skills: + Axway API Development/Administration + SC Clearance Responsibilities Designing, developing and deploying of Axway policies and containers using Axway Policy Studio v7.7 Working with DevOps toolset for develop and maintain Automated Testing … and Code Deployment Provide Assistance to Axway support team to resolve technical issues Administrating the Axway Environment, using Axway Policy Studio, Axway API Manager, Cassandra and API Gateway for Deployment of Axway Patches, monitor capacity, providing service improvements Liaise with customers to define project requirements, document and design solutions Knowledge of: SFTP HTTPS SSL/TLS oAuth JSON More ❯

technical ownership are valued. The role will involve building, optimising, and scaling backend systems, APIs, and services, while contributing to an agile delivery team. Key Skills Required: Strong Python development experience FastAPI MySQL Azure REST API development Microservices Agile methodologies TDD (Test-Driven Development) Desirable Skills: Ansible Docker Kubernetes Database experience across SQL, MongoDB, and Redis More ❯

cloud platform (AWS) and on VMs hosted a managed on-prem hosting environment. The application is extant and Live. You are to be the senior developer leading the ongoing development and support of the application, including designing, developing, integrating and unit testing new features in response to Product Owner/Client priorities and fixing bugs/issues raised on … the Live application. You will have experience working with/developing microservices, containerised applications, TypeScript, React(TypeScript), GraphQL/Hasura, API development and integration, PostgreSQL, JavaScript, GoLang, and Python. You will be comfortable using the supporting tools for Agile product delivery such as JIRA (User Story/Defect/Task Management), Confluence (Documentation/Comms), and Slack (collaboration …/comms). Key Responsibilities Lead development of microservices and front-end components using Node.js (TypeScript) and React (TypeScript). Configure and extend Hasura GraphQL Engine, including permissions, computed fields, and API integrations. Design and implement PostgreSQL schemas, migrations, and triggers; ensure data integrity and performance. Integrate with Identity and Access Management (IdAM) systems. Ensure secure coding practices More ❯

Dublin focused on rapid prototyping and innovation. We seek a hands-on, delivery-oriented Full Stack Engineer for our Product Engineering. In this role, you will engage in the development and implementation of innovative solutions that leverage Generative AI and other advanced technologies. You will provide technical leadership across the full stack, setting standards for robust design and timely … junior team members. What Technical Skills Do We Require: MEAN/MERN Stack experience. Familiarity with cloud platforms (AWS/GCP/Azure). Exposure to Apigee as an API Gateway. What Would Be Nice for You to Have Experience With: Event-driven, asynchronous, and reactive programming patterns. Secure coding and API development practices. Microservices design and More ❯

Canary Wharf, London Working model: Hybrid - 3 days onsite We're looking for a talented Backend developer with strong Java and Node.js/TypeScript experience to join a dynamic development team within a leading financial services organisation. This role is ideal for someone who enjoys working across both backend development and infrastructure, collaborating with centralised DevOps teams, and … writing unit & integration tests. Strong problem-solving skills, with the ability to meet deadlines in collaborative environments. Nice-to-Have Skills Experience with Snowflake (cloud data warehousing). GraphQL API development experience. This is an urgent vacancy. If you are interested then please apply directly to the ad Randstad Technologies is acting as an Employment Business in relation More ❯

LLM analysis implementation * Machine Learning & AI Libraries including: o Transformers/Hugging Face for working with pre-trained LLMs, fine-tuning, and inference o PyTorch for deep learning model development and training o OpenCV for computer vision tasks and image preprocessing in object detection o PIL/Pillow for image manipulation and format conversion o YOLO object detection frameworks … cleaning, and numerical operations * SQLAlchemy or psycopg2 for database connectivity and ORM operations * Boto3 for AWS service integration and automation AWS (working within Technical Lead's architecture): * Lambda function development with proper event handling and response formatting * S3 operations including multipart uploads, presigned URLs, and event notifications * CloudWatch logging and metrics for monitoring and debugging * Understanding of IAM and … security for role-based access and credential management * Experience with CDK for infrastructure deployment * SQS for message queuing * EKS/ECS/Kubernetes for containerised AI deployments API Development : * FastAPI for building REST APIs and model serving endpoints * Requests library for HTTP client operations and external API integration * Authentication/authorisation implementation (JWT, OAuth) Software Development More ❯

LLM analysis implementation * Machine Learning & AI Libraries including: o Transformers/Hugging Face for working with pre-trained LLMs, fine-tuning, and inference o PyTorch for deep learning model development and training o OpenCV for computer vision tasks and image preprocessing in object detection o PIL/Pillow for image manipulation and format conversion o YOLO object detection frameworks … cleaning, and numerical operations * SQLAlchemy or psycopg2 for database connectivity and ORM operations * Boto3 for AWS service integration and automation AWS (working within Technical Lead's architecture): * Lambda function development with proper event handling and response formatting * S3 operations including multipart uploads, presigned URLs, and event notifications * CloudWatch logging and metrics for monitoring and debugging * Understanding of IAM and … security for role-based access and credential management * Experience with CDK for infrastructure deployment * SQS for message queuing * EKS/ECS/Kubernetes for containerised AI deployments API Development : * FastAPI for building REST APIs and model serving endpoints * Requests library for HTTP client operations and external API integration * Authentication/authorisation implementation (JWT, OAuth) Software Development More ❯

an experienced Senior Java Developer to join their dynamic technology team. This role offers the opportunity to work on high-impact financial applications, driving innovation and excellence in software development within a fast-paced and regulated environment. As a Senior Java Developer, you will play a key role in designing, developing, and maintaining enterprise-grade applications, while mentoring junior … code reviews and provide constructive feedback. Collaborate with cross-functional teams to define, design, and deliver new features . Troubleshoot and debug complex issues. Required Qualifications Professional Java software development experience. Strong understanding of object-oriented programming and design patterns . Hands-on experience with Spring and Hibernate frameworks. Solid experience with relational databases (MSSQL, Oracle). Proven experience … with RESTful API design and development . Strong background in unit, regression, and integration testing (JUnit). Experience with Maven/Gradle build tools. Proficiency with Git or similar version control systems. Excellent problem-solving and communication skills . Ability to work independently as well as collaboratively in a team. Desirable Skills Experience with cloud platforms (AWS, Azure More ❯

Data Scientist to provide oversight and hands-on expertise for the build of an AI Agent within an automated insurance workflow . The project involves prompt engineering of LLMs, API development and integration , and deploying solutions in line with a defined solution design. The successful contractor will also provide day-to-day oversight and mentorship to a junior … responsible for: Designing, building, and deploying AI Agent solutions within an insurance workflow. Developing and refining prompt engineering approaches for large language models (LLMs). Building, testing, and integrating API calls to meet solution design specifications. Deploying containerised applications in Azure (or other cloud environments) . Providing technical leadership, support, and oversight to a junior Data Scientist . Collaborating … deliver AI/ML solutions from design through to deployment. Proven ability to provide technical oversight and mentorship . Desirable: Experience within Financial Services/Insurance environments. Familiarity with API-first solution architectures . Prior exposure to containerisation (Azure Container Apps, Kubernetes, Docker). More ❯

Role This is an exciting opportunity to join a forward-thinking organisation delivering cutting-edge automation solutions using AI and machine learning. You'll be part of a collaborative development team focused on enhancing and expanding automation services for high-volume, low-complexity workflows. Your work will involve developing and supporting systems that leverage OCR, Object Detection, and Large … Pillow, YOLO Python 3.9+ with OOP, async/await, and debugging techniques Data tools: Pandas, NumPy, SQLAlchemy/psycopg2 AWS: Lambda, S3, CloudWatch, IAM, CDK, SQS, EKS/ECS API development: FastAPI, Requests, JWT/OAuth Development Practices Agile methodologies (Scrum/Kanban), XP techniques (TDD, pair programming) Infrastructure-as-code and cloud monitoring (e.g., Grafana) Strong … across technical and non-technical audiences Experience supporting production systems and disaster recovery planning You'll also be expected to contribute to mentoring, team events, and continuous improvement of development processes and service quality. 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 More ❯

in secure government environments. Youll bring: Python and/or JavaScript/TypeScript experience, strong AWS skills, Kubernetes, CI/CD, and experience with data platforms, high-volume processing, API development, and Terraform. Exposure to Helm, Argo, or Tekton is a plus. This is an opportunity to work in a fast-paced, mission-critical setting with hybrid flexibility More ❯

to join their team on a 6-month initial contract. This role offers the opportunity to work on high-impact systems within a secure, high-availability environment, supporting the development of services hosted on Public Cloud platforms. Youll bring strong software engineering expertise, coupled with DevOps proficiency across AWS and GCP, to design and implement resilient frontend clients, backend … services, infrastructure automation, and cloud-native solutions. Key Responsibilities Design, develop and maintain secure, performant backend REST API services and frontend clients using Python, GoLang, Docker, and Cloud-Native services. Manage and implement database schema changes using Liquibase, ensuring compliance with audit and regulatory standards. Build and maintain CI/CD pipelines in collaboration with DevOps and Security teams. … Essential Technical Expertise Public Cloud services (AWS/GCP). Infrastructure build/configuration: Compute, Storage, Networking. Linux administration. Relational and NoSQL databases. Integration services (messaging, streams). RESTful API development. Containerisation, Kubernetes, serverless functions. Microservices & distributed tracing. Logging/monitoring frameworks (ELK, Splunk, Prometheus, Grafana). Automation with Terraform, Ansible or similar. Programming in Python, Java, GoLang. Desirable More ❯

Role This is an exciting opportunity to join a forward-thinking organisation delivering cutting-edge automation solutions using AI and machine learning. You'll be part of a collaborative development team focused on enhancing and expanding automation services for high-volume, low-complexity workflows.Your work will involve developing and supporting systems that leverage OCR, Object Detection, and Large Language … Pillow, YOLO Python 3.9+ with OOP, async/await, and debugging techniques Data tools: Pandas, NumPy, SQLAlchemy/psycopg2 AWS: Lambda, S3, CloudWatch, IAM, CDK, SQS, EKS/ECS API development: FastAPI, Requests, JWT/OAuthDevelopment Practices Agile methodologies (Scrum/Kanban), XP techniques (TDD, pair programming) Infrastructure-as-code and cloud monitoring (e.g., Grafana) Strong communication skills … across technical and non-technical audiences Experience supporting production systems and disaster recovery planningYou'll also be expected to contribute to mentoring, team events, and continuous improvement of development processes and service quality. 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 More ❯

all other internal teams WHAT YOU WILL WORK ON Rapid prototypes: Build, ship, learn, test, and iterate fast AI & Automation: Explore and integrate AI tools (OpenAI, Claude, Gemini) MCP & API development: Maintain and develop our MCPs and extend MailerLites capabilities Tech research: Stay ahead of industry trends, experiment with new tools and bring forward innovative solutions Direct impact … You will work closely with the CTO on R&D priorities and shape the next-gen of the MailerLite platform WHAT WE EXPECT FROM YOU Strong development background: Proficient in at least one major programming language. We use PHP & Laravel, but for this position we expect someone stronger at Typescript, Python or Go. Language is not important as long … We know that these tools havent been on the market for long, but we are looking for someone with practical experience using APIs like OpenAI/Anthropic/Gemini API & System knowledge: REST APIs, webhooks, distributed systems design Fast iteration mindset: Ability to go from idea to prototype to validation quickly Curiosity and autonomy: You have a love of More ❯

with cross functional teams to design and implement leading edge 3D graphics solutions for gamers and customers, and play a pivotal role in the innovation of GPU drivers and API development, and have technical ownership on key sections of projects. Your Role As a Senior Graphics Engineer, you will enjoy developing and optimising real time rendering pipelines to … standard features and extensions for Open GL ES and Vulkan. Your role as Senior Graphics Engineer will also see you being heavily involved in performance optimization and analysis, middleware development, and hardware integration. This will involve enhancing GPU drivers, analysing, graphic workloads, creating graphic based middleware libraries, as well as defining and integrating GPU requirements into the operating system. … innovative and collaborative environment. Working Pattern: Hybrid Determination: Inside IR35 About You Expert-level of proficiency in C and C++ programming languages Proven expertise in real-time embedded software development for mobile devices. Excellent knowledge of computer graphics, including OpenGL, OpenGL ES, Vulkan, or DirectX APIs. Deep understanding of graphics pipelines and modern mobile GPU architectures. Excellent system-level More ❯

and expanding the current automation service, which leverages OCR, Object Detection and LLM AI in order to automate some internal applications. You will bring a strong blend of Python development expertise, coupled with commercial exposure to modern AI technology and practices. Specifically, you will have a strong technical foundation across a blend of Large Language Models (LLMs), machine learning … fine tuning Machine Learning & AI Libraries including: Transformers/Hugging Face Python expertise with an understanding of object-oriented programming Pandas, PyTorch, Numpy SQLAlchemy, Boto3 AWS - Lambda, S3, CDK API Development Design and implementation of AI/ML solutions Excellent communicator Strong stakeholder management Keen collaborator The above is not exhaustive. For further information on this opportunity please More ❯

Axway API Developer (SC Cleared) ?? 6 months contract Inside IR35 ?? £500 to £650 a day ??Remote Working (UK based) *Active SC Clearance is needed* A top-tier defense organization is looking for an experienced Axway API Developer/Administrator to join their team on a 6-month contract. You will contribute to a large government gateway project, and … liaising with stakeholders to define requirements and design comprehensive solutions. To be successful in this role, you should have a solid foundation in: Axway's core products: Policy Studio, API Gateway, and API Manager. Key communication protocols: SFTP, HTTPS, SSL/TLS, and oAuth. Data and messaging formats: JSON, XML, SOAP, and REST. Linux scripting and environments. Using … and deployments. 6 months contract Inside IR35 - Remote Working - ?? £500 to £650 a day *Active SC Clearance is needed* If you are an experienced professional with a background in API, MFT, or secure file transfers, this could be the perfect opportunity for you. If the above sounds of interest to you then please apply directly to the AD or More ❯

requirements and iterate quickly on solutions. Implement testing frameworks, version control, and data validation processes. Integrate with market data, storage systems, and reporting platforms. Required Skills 5+ years' Python development experience, ideally within trading, risk, or financial services. Strong background with Pandas, NumPy, and data science libraries . Hands-on experience with Flask or FastAPI for API development. More ❯

Axway API Developer +6 months + +£650 - £700 a day +Inside IR35 +Fully remote working +SC cleared role Responsibilities Designing, developing and deploying of Axway policies and containers using Axway Policy Studio v7.7 Working with DevOps toolset for develop and maintain Automated Testing and Code Deployment Provide Assistance to Axway support team to resolve technical issues Administrating the … Axway Environment, using Axway Policy Studio, Axway API Manager, Cassandra and API Gateway for Deployment of Axway Patches, monitor capacity, providing service improvements Liaise with customers to define project requirements, document and design solutions Your skills and experience SFTP HTTPS SSL/TLS oAuth JSON XML SOAP REST Mime Linux Scripting SC clearance is essential for this role. … If you'd like to discuss this Axway API Developer in more detail, please send your updated CV to (url removed) and I will get in touch. More ❯

Axway API Developer (SC Cleared) 6 months contract Inside IR35 £500 to £650 a day Remote Working (UK based) Active SC Clearance is needed A top-tier defense organization is looking for an experienced Axway API Developer/Administrator to join their team on a 6-month contract. You will contribute to a large government gateway project, and More ❯