1 to 25 of 49 JSON Jobs in London

Java Developer - Payments

Hiring Organisation
Crisil
Location
London Area, United Kingdom
APIs for payment processing, reconciliation, and message translation. Implement ISO 20022 (MX) to MT message transformation logic and related schema validation using XML/JSON parsers. Integrate with payment gateways, SWIFT interfaces, RTP/FedNow services , and internal systems like Core Banking or Treasury. Develop components supporting real-time payments ...

Senior Java Developer

Hiring Organisation
Response Informatics
Location
Croydon, Surrey, South East, United Kingdom
Employment Type
Permanent
Salary
£70,000
Junit, Mockito, PowerMockito & Wiremock Experience and understanding of CICD pipeline of Docker, Jenkins and Kubernetes Understanding of all the agile ceremonies. Good understanding of JSON and XML Experience in Relational Database Management System (e.g. PostgreSQL) Nice to have skills: Knowledge of Workflow/Business Process Management tools Experience with front ...

Mid-Senior Ruby on Rails Engineer (B2B SaaS | Hybrid | UK)

Hiring Organisation
Transreport
Location
London Area, United Kingdom
experience with PostgreSQL, including performance tuning and complex queries. Experience with background job processing using Sidekiq and Redis. Solid understanding of RESTful API design, JSON serialization, and authentication (e.g., JWT, SSO). Hands-on experience with AWS services and containerised deployments (Docker). Experience troubleshooting and supporting production systems. Comfortable ...

Service Now Developer

Hiring Organisation
Sphere Digital Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£700 - £701 per day
Skills Strong ServiceNow development experience (3+ years) Hands-on experience with Service Portal Solid background in web technologies including HTML, AngularJS, Bootstrap, CSS, JavaScript, JSON, HTTP, and REST/SOAP Experience with ServiceNow integrations Ability to work in Agile environments Strong troubleshooting and analytical skills Excellent written and verbal communication ...

Senior WordPress Engineer

Hiring Organisation
La Fosse
Location
City of London, London, United Kingdom
Gutenberg ecosystem Strong full‐stack capability across PHP, HTML, CSS, JavaScript, and modern front-end frameworks (React) Proven experience building custom Gutenberg blocks, WP-JSON API endpoints, and custom feeds Solid understanding of performance optimisation, Core Web Vitals, caching strategies, and scalability Confidence working with Git, Agile delivery methods ...

ServiceNow Developer

Hiring Organisation
Harnham - Data & Analytics Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£550 - £600 per day
within a team Technical Skills ServiceNow platform development and workflow configuration Web technologies: JavaScript, AngularJS, HTML, CSS, Bootstrap APIs and integrations: REST, SOAP, JSON, HTTP Experience building and maintaining ServiceNow integrations Strong troubleshooting, documentation and debugging capability Desirable Experience Experience with ServiceNow CSM (Customer Service Management) Exposure to Jira ...

Java Architect (with Capital Markets)

Hiring Organisation
DXC Technology
Location
City of London, London, United Kingdom
optimizing SQL queries on PostgreSQL databases. Strong experience with multithreading, data structures, and concurrency scenarios. Proficient in using REST APIs, XML, JAXB, and JSON in creating layered systems. Experience with AWS Services (AWS Lambda, AWS CloudWatch, API Gateway, ECS, ECR, SQS, SNS). Familiarity with Open AI APIs, Agentic ...

Applications Developer x2

Hiring Organisation
TXP Technology x People
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£525 - £526 per day
resolve application and integration issues. Support Azure-based application hosting and associated services. Essential Skills & Experience Candidates must have experience with: Python SQL JSON API development (WebMethods, Kong) Containerised deployments ( Docker ) Microsoft Azure ...

Applications Developer x2

Hiring Organisation
TXP Technology x People
Location
London, UK
resolve application and integration issues. xehkeey Support Azure-based application hosting and associated services. Essential Skills & Experience Candidates must have experience with: Python SQL JSON API development (WebMethods, Kong) Containerised deployments (Docker) Microsoft Azure ...

DevOps / Cloud Engineer

Hiring Organisation
Lynx Recruitment Ltd
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
Salary negotiable
serverless technologies (e.g. AWS Lambda, API Gateway) Solid knowledge of Linux-based systems Ability to write code/scripts (ideally Python, plus YAML/JSON) Experience working with distributed, enterprise-level systems Strong communication skills and ability to work with stakeholders Additional Desirable Skills Experience with tools such as Ansible ...

DevOps / Cloud Engineer

Hiring Organisation
Lynx Recruitment Ltd
Location
London, UK
serverless technologies (e.g. AWS Lambda, API Gateway) Solid knowledge of Linux-based systems Ability to write code/scripts (ideally Python, plus YAML/JSON) Experience working with distributed, enterprise-level systems xehkeey Strong communication skills and ability to work with stakeholders Additional Desirable Skills Experience with tools such ...

ServiceNow Developer

Hiring Organisation
CBSbutler Holdings Limited trading as CBSbutler
Location
London, United Kingdom
Employment Type
Contract
record delivering across the ServiceNow platform Solid Service Portal development experience Strong technical background across: JavaScript, AngularJS, HTML, CSS, Bootstrap REST/SOAP APIs, JSON, HTTP Experience integrating ServiceNow with other systems Comfortable working in Agile environments Strong troubleshooting and problem-solving skills Nice to Have: Experience with Customer Service ...

Senior Data Analyst

Hiring Organisation
Insight International (UK) Ltd
Location
City of London, London, United Kingdom
data stores) Experience in designing and implementing effective tests (unit, component, integration, end-to-end, performance, etc.) Experience in working with technical data formats (JSON/Avro/Parquet) Strong analytical and problem-solving skills Experience in explaining and converting complex concepts into digestible information to be consumed by both ...

Lead Solution Architect Endur (ETRM Gas & Power Trading)

Hiring Organisation
BP Energy
Location
South West London, London, United Kingdom
Employment Type
Work From Home
services (strongly preferred) and cloud-native patterns C# or Java Containerisation (Kubernetes/Docker/OpenShift) Infrastructure as code (Terraform) Integration and messaging (APIs, JSON/Swagger/OpenAPI, AMQ or similar) CI/CD and DevOps tooling; Git-based workflows Nice to have Endur modernisation experience (e.g., upgrades, cloud ...

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 ...

Mainframe Engineer

Hiring Organisation
Impellam Group
Location
City of London, London, United Kingdom
CICS webservices, ZOS Connect EE, DB2, and batch processing. Strong skills in mainframe transaction management, JCL, and system debugging tools. Familiarity with SOAP, WSDL, JSON, and integration patterns such as SOA and RESTful APIs. Good working knowledge of AWS services, particularly CloudWatch, DynamoDB, and Lambda, including monitoring, troubleshooting, and optimisation. ...

ServiceNow Developer

Hiring Organisation
People First (Recruitment) Ltd
Location
London, United Kingdom
Employment Type
Temporary
Salary
£45 - £65/hour
Strong ServiceNow development experience Hands-on development experience on the Service Portal Strong technical background using web technologies (specifically HTML, AngularJS, Bootstrap, CSS, JavaScript, JSON, HTTP, REST/SOAP) ServiceNow integration experience ServiceNow Customer Service Management experience desirable ( CIS-CSM certification ideal) ServiceNow Certified Application Developer (CAD) Working within ...

Founding Engineer

Hiring Organisation
Tarka Talent
Location
City of London, London, United Kingdom
with AI or ML systems in production and 3–5 years of substantive software/platform engineering Deep JavaScript/Node.js skills Azure Fluency JSON data structures, REST API design, and complex semi-structured data Practical LLM application — RAG architectures, prompt engineering etc Comfort with both relational ...

Senior AI Engineer

Hiring Organisation
Harnham
Location
City of London, London, United Kingdom
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 ...

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/ ...

Senior Full Stack Engineer

Hiring Organisation
Access Computer Consulting
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £440/day
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 ...

Oracle Integration Cloud Developer

Hiring Organisation
ARM
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £600/day Inside IR35
integration, security, and performance Required Skills: Strong experience with Oracle Integration Cloud (OIC) Knowledge of REST/SOAP web services Experience with XML, XSLT, JSON Familiarity with Oracle SaaS (ERP/HCM) integrations Understanding of integration patterns and workflows Preferred Qualifications: Experience with Oracle SOA Suite/ICS Basic knowledge ...

DevOps Engineer / ElasticSearch SME

Hiring Organisation
Hays
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£450.0 - £500.0 per day + up to £500pd (inside IR35)
e.g. Docker, VMware) and Linux with Shell scripting. Hands-on experience supporting ElasticSearch integrations (indexing, query DSL etc) and experience supporting search-driven services (JSON, Logstash, Kibana etc) Experience with Platforms and Operation Systems including, Oracle Solaris 10, Red Hat Enterprise Linux 8, Windows Server 2008/2016/ ...

Head of Engineering

Hiring Organisation
Zeus® | AI-Powered Logistics
Location
London Area, United Kingdom
/S/4HANA patterns), TMS, WMS, carrier/telematics platforms, customer master systems Own integration architecture across: Inbound/outbound APIs (REST/JSON), event-driven messaging (queues/topics), batch feeds, file-based interfaces (S3-based exchanges), structured email fallbacks Demonstrate practical experience with API management and integration ...

Guidewire Integration Lead - £800/day inside - 9 months

Hiring Organisation
Hawksworth
Location
London Area, United Kingdom
10+ years of Guidewire Integration development experience Proven experience leading integration teams (PolicyCenter, BillingCenter, ClaimCenter). Java, Gosu; REST/SOAP Web Services; XML, JSON Integration Gateway, Cloud API, Batch/Async processing Agile/Scrum delivery environments and using JIRA. Desirable, but not essential.. Guidewire ACE certified integration specialist ...