1 to 25 of 53 JSON Jobs in London

Senior Quality Engineer

Hiring Organisation
Pontoon
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £550/day Inside IR35
Execution Automation & Tools Selenium Playwright (essential) Postman REST API Testing JMeter/Performance Testing Jira Xray/Zephyr Technical Skills SQL and Database Testing JSON/REST Services Mobile Testing (iOS & Android) Web Application Testing Test Data Management Log Analysis and Troubleshooting DevOps & Delivery GitHub Git CI/CD Pipelines ...

Senior Java Developer

Hiring Organisation
CODEVERSE LIMITED
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£300 - £400 per day
Design and optimise AWS Aurora PostgreSQL databases and data platforms. Deploy and support applications using Docker and Kubernetes . Develop API integrations using REST, JSON and modern API design practices. Implement resilient systems with appropriate retry, timeout and error-handling mechanisms. Work with monitoring and observability tools including Grafana, Prometheus ...

Senior Integration Developer (IBM ACE / IIB) - Banking

Hiring Organisation
Salt Search
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £600 per day
/SQL skills with Oracle databases. Experience working with Oracle database design. Good knowledge of Linux (RHEL) environments. Experience with XML and JSON message formats. Strong understanding of enterprise integration and messaging architecture. Experience across the full Software Development Lifecycle (SDLC). Ability to produce high-quality technical documentation ...

AVP Software Developer

Hiring Organisation
Adecco
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
frameworks like Spark. Data Engineering Knowledge:- Proven experience building ETL/ELT pipelines and using orchestration tools (Airflow, Azure Data Factory).- Understanding of JSON, XML, APIs, and data ingestion technologies. Cloud Experience:- Familiarity with cloud platforms (Azure, AWS, GCP) is a plus. Preferred Qualifications: Understanding of data governance ...

AVP Software Developer

Hiring Organisation
Adecco
Location
City of London, London, United Kingdom
Employment Type
Contract
frameworks like Spark. Data Engineering Knowledge: - Proven experience building ETL/ELT pipelines and using orchestration tools (Airflow, Azure Data Factory). - Understanding of JSON, XML, APIs, and data ingestion technologies. Cloud Experience: - Familiarity with cloud platforms (Azure, AWS, GCP) is a plus. Preferred Qualifications: Understanding of data governance ...

Senior Digital Developer – OTDT PC – ODM

Hiring Organisation
NHS Blood and Transplant
Location
England, S75 3FG, Barnsley, Liverpool, L24 8RB, Manchester, M13 9LL, London, NW9 5BG, BristoL, BS34 7QH, SW17 0RB, Birmingham, B15 2SG, United Kingdom
Salary
£49387.00 to £56515.00
analysis. Other Mandatory Skills Estimation methods, SOLID design principles, Agile/Lean and Traditional Methodologies. OOAD and UML Techniques. HTML, JavaScript, JQueryXML, XSD, JSON Network architecture and protocols such as SNMP, HTTP, SOAP, REST and SOA Web Services,Testing Strategies, Testing Tools SQL Developer as testing tool, JMeter, APEXSec, cURL ...

Senior .Net Developer

Hiring Organisation
LANCESOFT LTD
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP Annual
C# and .NET (.NET Core/.NET) Excellent Object Oriented Programming (OOP) skills and design principles Proven experience designing and implementing APIs (REST/JSON) Solid understanding of application architecture, performance, and scalability Experience with SQL databases (e.g. SQL Server) Familiarity with unit testing, integration testing, and CI/ ...

Fully Remote Senior .Net Developer

Hiring Organisation
LANCESOFT LTD
Location
London, England, United Kingdom
C# and .NET (.NET Core/.NET) Excellent Object Oriented Programming (OOP) skills and design principles Proven experience designing and implementing APIs (REST/JSON) Solid understanding of application architecture, performance, and scalability Experience with SQL databases (e.g. SQL Server) Familiarity with unit testing, integration testing, and CI/ ...

Java + CloudNative

Hiring Organisation
Randstad Technologies Recruitment
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£65000 - £70000/annum
JavaScript (ES6+), Redux/Context API, HTML5, CSS3, REST/gRPC integration. Streaming & Messaging: Apache Kafka, Apache Flink. APIs & Protocols: RESTful web services, gRPC, JSON, Protocol Buffers. Core Computer Science: Strong mastery of data structures, algorithms, object-oriented design, and design patterns. DevOps & Tooling: CI/CD pipelines (Jenkins, GitLab ...

Senior Wordpress Developer

Hiring Organisation
Alban Recruitment Solutions
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£35,000 - £50,000 per annum
Front End CSS3 SASS/SCSS JavaScript (ES6+) jQuery Responsive development Cross-browser compatibility Modern Development Git version control Composer npm Vite REST APIs JSON CI/CD principles Experience in one or more of the following would be highly advantageous: React Node .js Python Laravel TypeScript Docker Linux server ...

Software Engineer

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent
Salary
£70,000
Awareness of clean coding and SOLID principles. Exposure to AWS cloud services. Experience with JUnit or other testing tools. Basic knowledge of XML/JSON data formats and Unix shell scripting. Familiarity with version control and build tools like Git, Maven, Jenkins. Behavioural Competencies Collaborative team member eager to support ...

AI & Copilot Developer

Hiring Organisation
Hunter Selection
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£60000 - £70000/annum 33 days holiday, bonus + more
experience with Power Apps and Power Automate. Experience or exposure to Copilot Studio, AI Agents, or Microsoft AI technologies. Knowledge of Dataverse, Power FX, JSON, JavaScript, and API integrations. Familiarity with Microsoft 365 and Azure environments. Strong problem-solving and analytical skills. Excellent communication skills and the ability to work ...

Senior C# / .NET Developer (Risk/ Securities Lending) - Banking

Hiring Organisation
Robert Walters
Location
London, South East, England, United Kingdom
Employment Type
Temporary
Salary
£400 - £650 per day
Operations and Compliance teams What you'll bring: Strong C# and modern .NET experience Excellent OOP and software-design skills Experience with REST APIs, JSON and SQL databases Experience with cloud platforms (Azure/AWS) Hands on with messaging technologies (e.g. Kafka) Experience in front to back trading or financing ...

Senior Android Developer

Hiring Organisation
Stott & May Professional Search Limited
Location
London, United Kingdom
Employment Type
Permanent
Salary
£90,000
Android SDKs, with a deep understanding of Jetpack libraries, Compose and modern Android architecture components. * Kotlin Multiplatform (KMM, KMP) * Experience with RESTful APIs, JSON, and mobile architecture patterns (MVVM, Clean Architecture). * Familiarity with Android Studio, GitHub, mobile CI/CD tools, automated testing frameworks and the Play store deployment ...

Power Platform Developer

Hiring Organisation
Hunter Selection
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£50000 - £65000/annum 33
Platform Developer Commercial experience developing solutions using Power Apps and Power Automate. Experience with Dataverse and Power Platform governance concepts. Understanding of Power FX, JSON, JavaScript, and system integration principles. Exposure to Power Automate Desktop, Copilot Studio, or similar automation technologies. Familiarity with Microsoft 365 and Azure environments. Strong problem ...

Security Engineer

Hiring Organisation
Precise Placements
Location
London, South East, England, United Kingdom
Employment Type
Temporary
Salary
£70,000 - £85,000 per annum
Skills & Experience Technical Expertise Strong hands-on experience with SIEM platforms (e.g. Splunk, Microsoft Sentinel, QRadar, Elastic, LogRhythm, ArcSight, Exabeam) Knowledge of log formats (JSON, syslog, XML, CEF) and ingestion methods (APIs, agents, Kafka, Event Hubs) Experience in detection engineering, threat modelling, and attacker behaviour analysis Familiarity with SOAR tools ...

Software Engineer

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£75,000
Cucumber, Wiremock, Mockito; TDD and BDD. OO analysis and design; clean coding and SOLID principles. Agile frameworks and DevOps culture/practices. XML/JSON and Java serialization. Desirable Criteria Layered/clean architecture and design patterns. AWS services e.g ECS, RDS, SQS, ECR etc. Containerisation (e.g., Docker). Unix ...

Senior Bureau Messaging Integration Architect

Hiring Organisation
I3 Resourcing Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent
Lloyd's ecosystem. Hands-on experience with technologies such as Azure Integration Services, MuleSoft, Boomi, IBM MQ, Kafka, REST/SOAP APIs, XML, JSON, and managed file transfer solutions. Experience designing cloud-native and hybrid integration architectures. Knowledge of TOGAF or a comparable enterprise architecture framework. A degree in Computer ...

Senior Bureau Messaging Integration Architect - Insurance

Hiring Organisation
I3 Resourcing Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
delegated authority and Lloyd's ecosystem platforms. Hands-on knowledge of Azure Integration Services, MuleSoft, Boomi, IBM MQ, Kafka, REST/SOAP, XML, JSON, and managed file transfer technologies. Understanding of cloud and hybrid integration architecture. TOGAF or similar architecture framework knowledge desirable. Integration Architecture or Solution Architecture - London Market ...

Lead Java Developer (Server-side, Microservices) Bank - London

Hiring Organisation
Salt
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
€500 - €800 per day
design skills in technologies such as Oracle Splunk DevOps principles, processes and tooling IBM MQ Messaging Standards, for example ISO 15022, ISO 20022 and JSON Working in Financial Market Infrastructure and/or Regulated environments *Rates depend on experience and client requirements ...

Senior ServiceNow Developer

Hiring Organisation
Tria
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£475 - £575/day
development experience Strong ITSM, Service Catalog, Flow Designer, IntegrationHub & CMDB Advanced JavaScript, Glide APIs, Business Rules & Script Includes Extensive REST/SOAP API, OAuth, JSON/XML & MID Server experience Strong enterprise integration and workflow automation experience Excellent stakeholder management and problem-solving skills Rate: £475-£575/ ...

Senior Network Engineer with Infrastructure as Code (IaC)

Hiring Organisation
Randstad Technologies Recruitment
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £747/day
Deep expertise in Cisco NX-OS, VXLAN BGP-EVPN, vPC, and Cisco NDFC. Infrastructure as Code (IaC) Automation: Python (REST APIs, data modeling), YAML, JSON, and Red Hat Ansible Automation Platform (AAP). CI/CD & Testing: GitHub/GitLab workflows, pyATS, and Genie for pre- and post-change validation. ...

Senior Network Engineer - London, UK

Hiring Organisation
Randstad Technologies Recruitment
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £747/day
Must-Have Skills Networking: Deep expertise in Cisco NX-OS, VXLAN BGP-EVPN, vPC, and Cisco NDFC. Automation: Python (REST APIs, data modeling), YAML, JSON, and Red Hat Ansible Automation Platform (AAP). CI/CD & Testing: GitHub/GitLab workflows, pyATS, and Genie for pre- and post-change validation. ...

Senior Bureau Messaging Integration Architect

Hiring Organisation
Arthur
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP 90,000 - 110,000 Annual
Exposure Experience across a combination of the following would be beneficial: Azure Integration Services MuleSoft Boomi IBM MQ Kafka REST/SOAP XML/JSON Managed File Transfer solutions Highly Desirable London Market or broader insurance sector experience. Lloyd's market knowledge. ACORD standards. TOGAF or similar architecture methodologies. Cloud ...

Network Automation Architect

Hiring Organisation
Adecco
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£600 - £740 per day
VXLAN BGP EVPN, vPC, SNMPv3, TACACS+).Python for production-quality automation and REST API integration.GitHub/GitLab experience, including self-hosted runner configuration.YAML and JSON data handling.Red Hat Ansible Automation Platform.Experience producing HLD/LLD documentation aligned to FCA/PRA standards. Desirable Skills: Familiarity with Batfish, VMware NSX, Docker ...