1 to 25 of 60 JSON Jobs in London

Senior Automation Test Engineer - ETRM / Trading Platforms

Hiring Organisation
Data Careers
Location
South East London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£90,000
with an ETRM platform with as many of the following as possible: Programming & Scripting: Python, Java, JavaScript, C++, Scriban Web Technologies: RESTful APIs, HTTP, JSON, HTML, CSS, Node.js Databases: SQL Server, MySQL, PostgreSQL, MongoDB Tools & Frameworks: Git, Docker, Jenkins, Kubernetes, Agile (Scrum & Kanban), JIRA, Pytest, Powershell Operating Systems: Linux, Windows ...

Integration Developer

Hiring Organisation
Shaw Daniels Solutions
Location
London, UK
Employment Type
Full-time
processes, JavaScript, T-SQL, formulas, C#, PowerShell and other scripts as required. Proficient in manipulating and working with a range of data formats including JSON, XML, delimited text, Excel, etc. Familiarity with .Net development, Microsoft tools and DevOps. Responsible for the development of Azure Logic Apps, Azure Function Apps, workflows ...

Developer (MS) (18 Months FTC)

Hiring Organisation
London Borough of Barnet
Location
Barnet, London, United Kingdom
Employment Type
Contract
Contract Rate
£56376 - £61653/annum
core development languages such as PowerShell, JavaScript, C#, Python or similar. - Experience working with data sources including MS SQL, Dataverse, APIs, REST services, JSON/XML and other integration methods. - Strong problemsolving skills and the ability to identify creative solutions to longstanding challenges. - Excellent communication skills, with the ability ...

Senior Engineer

Hiring Organisation
&Dine
Location
Greater London, England, United Kingdom
clean architecture Frameworks – Vue/Nuxt (or React/Next.js), component-based development State management – Vuex, Pinia, or equivalent patterns API integration – REST/JSON, error handling, loading states Performance – bundle optimisation, code splitting, rendering strategies Accessibility & UX – semantic HTML, responsive design, usability best practice Testing – unit and component testing ...

Lead Solution Architect

Hiring Organisation
BP Energy
Location
London, UK
Employment Type
Full-time
Terraform. Familiarity with React for UI development is highly valuable. Integration Expertise: You understand real-time messaging such as AMQ, API design using JSON and Swagger, and batch processing methods commonly used in trading systems. Infrastructure & DevOps: You understand CI/CD workflows, Git-based repositories, automation tools such ...

Developer (AI/RPA) (18 Months FTC)

Hiring Organisation
London Borough of Barnet
Location
Barnet, London, United Kingdom
Employment Type
Contract
Contract Rate
£56376 - £61653/annum
workflows, bots and automation solutions - Experience developing and maintaining automated pipelines for AI tools - Ability to integrate multiple systems and applications using APIs, JSON, XML, CSV, or other data interchange methods. - Knowledge of database environments (e.g., MS SQL, Dataverse, OneLake). - Experience working with or supporting machine learning models, including ...

DevOps Engineer

Hiring Organisation
FDM Group
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 - £60,000 per annum
Code practices and implementation Strong understanding of networking, security, and system administration. Technical Skills Azure monitoring and Application Insights ARM/Bicep templates and JSON scripting PowerShell scripting Software development methodologies and practices Security best practices and risk management Technical Skills & Innovation Ability to monitor system performance, availability, and reliability ...

Senior Mobile iOS Developer (Remote)

Hiring Organisation
Stott & May Professional Search Limited
Location
London, United Kingdom
Employment Type
Permanent
Salary
£90,000
Experience * Strong proficiency in Swift and iOS SDKs, with a deep understanding of UIKit, SwiftUI, Combine, and Core frameworks. * Experience with RESTful APIs, JSON, and mobile architecture patterns (MVVM, Clean Architecture). * Familiarity with Xcode, GitHub, mobile CI/CD tools, automated testing frameworks and the app store deployment process. ...

Automation Test Engineer

Hiring Organisation
VIQU IT Recruitment
Location
City of London, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£400 - 600 per day + Inside IR35
Bloomberg, MarkitWire). Strong understanding of multi-system message flows and ability to automate integrations involving outbound/inbound messages (EG: via XML, JSON). Strong SQL/reporting skills and familiarity with API driven automation. Experience with BDD or structured scenarios writing practices is required Ability to conduct root ...

Confluent Engineer

Hiring Organisation
LA International Computer Consultants Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 403 Daily
Confluent Platform components. * Strong understanding of event-driven architecture concepts (event streaming, event sourcing, Pub/Sub, stream processing). * Experience with Avro/JSON/Protobuf, schema evolution, and Schema Registry. * Integration experience with Back End systems such as SQL/NoSQL databases, APIs, and cloud data platforms. * Familiarity ...

PEGA Developer

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £450 to £500 per day
Pega architecture and rule resolution, including class structure, rulesets, circumstancing, inheritance, and performance tuning. Experience in building integrations using REST/SOAP services, JSON/XML, and handling real-time and batch data exchanges with upstream/downstream systems. Strong understanding of data modelling in Pega, including Data Pages, data ...

Mulesoft Architect

Hiring Organisation
167 Solutions Ltd
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
Anypoint Platform (Studio, API Manager, Runtime Manager) Solid understanding of API-led connectivity and enterprise integration patterns Experience with REST, SOAP, RAML/OpenAPI, JSON, XML Strong DataWeave development and transformation experience Familiarity with CI/CD pipelines and cloud deployment models Ability to manage both design-level architecture ...

Confluent Engineer

Hiring Organisation
eTeam Workforce Limited
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Daily
Confluent Platform components. Strong understanding of event-driven architecture concepts (event streaming, event sourcing, Pub/Sub, stream processing). Experience with Avro/JSON/Protobuf, schema evolution, and Schema Registry. Integration experience with Back End systems such as SQL/NoSQL databases, APIs, and cloud data platforms. Familiarity ...

Senior AI Engineer

Hiring Organisation
Harnham - Data & Analytics Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £90,000 per annum
first products that deliver measurable value. * Develop and deploy production-grade AI agents on GCP using ADK, integrating with internal systems via REST and JSON APIs. * Build and maintain robust evaluation and monitoring frameworks, including online and offline testing, A/B experiments and performance dashboards. * Integrate AI agent functionality ...

Agentforce Developer

Hiring Organisation
Anson Mccade
Location
Central London, London, United Kingdom
Employment Type
Contract, Work From Home
Strong knowledge of testing methodologies (functional, regression, exploratory, UAT). Understanding of AI/ML concepts or LLM-based systems (preferred). Familiarity with JSON, APIs, and test automation frameworks. Exceptional analytical skills with strong attention to detail. Excellent communication skills and ability to work in Agile environments. Desired Qualifications ...

Shopify Developer

Hiring Organisation
Halian Technology Limited
Location
Central London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£55,000
HTML5, CSS3/SCSS, JavaScript ES6+) Experience building custom Shopify themes (not just modifying pre-built themes) Familiarity with Shopify 2.0 architecture (sections everywhere, JSON templates) Experience integrating third-party apps and APIs Strong understanding of responsive design principles Git/version control experience Ability to manage multiple client projects ...

Lead Architect

Hiring Organisation
Accelerant
Location
South London, UK
Employment Type
Full-time
capabilities, progressive enhancement, and accessibility (WCAG) Create governance frameworks that balance standardization with team autonomy Drive adoption of industry standards (OAuth2, OpenID Connect, OpenTelemetry, JSON:API) over proprietary alternatives Technical Leadership Partner with engineering teams on design reviews, PR reviews, and implementation guidance Establish standards for cross cutting concerns ...

Network Automation Engineers

Hiring Organisation
Tech Mahindra
Location
London, United Kingdom
Employment Type
Permanent
Salary
£60000 - £75000/annum
Cisco NSO – Service development and lifecycle Apache Airflow Hasi Corp Vault Openshift Automation development Python Fast API Rest API Netconf Yang modelling XML/Json Jinja/TextFSM Pytest Unit testing Database MongoDB DevOps Docker Git CI/CD Kubernetes Networking Ciena 517x/8180/8114 Nokia BNG/ ...

Java Developer

Hiring Organisation
Experis
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£468 - £469 per day
tools such as Apache Spark or in this instance LakeFS, for data processing and management. Useful - R, Apache Spark Very useful - Python, SQL, JSON, LakeFS. ...

Data Engineer

Hiring Organisation
Experis
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £510/day
working in cloud environments such as AWS or Azure is expected, with Databricks considered a nice to have. Required Skills: Java background Node JS Json RDS React Data Modelling Python/Spark Cloud experience (AWS/Azure) o AWS Glue o Databricks Testing e.g. PyTest Data Quality e.g. Great Expectations ...

Full Stack JavaScript Developer

Hiring Organisation
Devonshire Hayes Recruitment Specialists Limited
Location
Upminster, Essex, England, United Kingdom
Employment Type
Full-Time
Salary
£40,000 - £60,000 per annum
Skills & Experience Strong experience with CSS3, JavaScript, and React. Experience with Back End development and SQL databases. Experience implementing REST APIs and working with JSON/XML data formats. Experience with Google Analytics and conversion/lead tracking systems. Experience building responsive, high-performing websites. Strong understanding of UI/ ...

Full Stack Web Developer

Hiring Organisation
Devonshire Hayes Recruitment Specialists Ltd
Location
Havering, Greater London, Upminster, United Kingdom
Employment Type
Permanent
Salary
£40000 - £60000/annum
Skills & Experience Strong experience with CSS3, JavaScript, and React. Experience with Back End development and SQL databases. Experience implementing REST APIs and working with JSON/XML data formats. Experience with Google Analytics and conversion/lead tracking systems. Experience building responsive, high-performing websites. Strong understanding of UI/ ...

Front End React Developer

Hiring Organisation
Ascend Consulting
Location
NW7, Mill Hill, Greater London, United Kingdom
Employment Type
Permanent
Salary
£45000 - £75000/annum Great Benefits
core principles Experience with Redux and RTK (RTKQuery also a bonus) Familiarity with RESTful APIs Knowledge of modern authorization mechanisms, such as JSON Web Token Familiarity with modern front-end build pipelines and tools (Github actions a bonus) Experience with common front-end development tools such as Babel, Webpack ...

Ruby Developer

Hiring Organisation
Proactive Appointments
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP 70,000 - 80,000 Annual
Strong understanding of OOP & Rails architecture Extensive experience with PostgreSQL (performance tuning, complex queries) Background job processing with Sidekiq & Redis Expertise in RESTful APIs , JSON, JWT, SSO Experience with AWS & Docker Production system support & troubleshooting Strong communication skills & Agile/Scrum experience Ruby on Rails Developer Due to the volume ...

Senior AI Engineer (Platform)

Hiring Organisation
Harnham
Location
Greater London, England, United Kingdom
operate production‐grade AI agents on GCP using Google’s ADK Integrate AI systems with policy, claims and CRM platforms via REST/JSON APIs Develop scalable RAG pipelines including ingestion, text processing and vector search Implement evaluation, monitoring, A/B testing and cost/latency dashboards Shape architectural ...