1 to 25 of 91 Permanent JSON Jobs in London

Technical Consultant - C# and VB.NET - London, UK

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
technologies. Knowledge of web technologies including ASP.NET, HTML5, CSS3, JavaScript, and modern application integration practices. Experience working with data interchange formats such as XML, JSON, AJAX, and REST‐based integrations. Strong understanding of Software Development Life Cycle (SDLC), application architecture, design patterns, and coding best practices. Experience leading development activities ...

Senior Java Developer

Hiring Organisation
MW recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£90,000 - £125,000 per annum
Markets knowledge, ideally within Clearing or Prime Brokerage. Desirable Previous team leadership or mentoring experience Knowledge of Groovy, FIX/FIXML, FpML, REST APIs, JSON or messaging technologies Experience developing client portals and reporting platforms Experience working with distributed or offshore development teams. Technical Environment You'll have exposure ...

C# Senior Developer

Hiring Organisation
Appcast
Location
London, UK
MSMQ or RabbitMQ • Experience of web technologies including HTML, CSS, JavaScript, jQuery and web client frameworks such as Knockout.js or Angular • Experience of XML, JSON and related like schemas and XSLT transformations • Experience of T-SQL for Microsoft SQL Server (2012 or higherThis role is for candidates who are looking ...

Senior Salesforce Developer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
building modern UI components with Lightning Web Components (LWC) and Aura. Integrations: Proven track record of designing and executing complex API integrations (REST, SOAP, JSON, Event‐Driven Architectures). DevOps & Tooling: Proficient with Git‐based version control, SFDX, metadata deployment pipelines, and automated testing frameworks (>85% code coverage standards). ...

Senior Integration Developer (IBM ACE / IIB) – Banking

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
/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 ...

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 .Net Developer

Hiring Organisation
LANCESOFT LTD
Location
London, 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/ ...

Microsoft Dynamics 365 Developer, Power Pages

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
experience with Microsoft Dynamics 365, Power Automate Flow, and Power Pages. Experience with Azure DevOps, Git, Azure Functions, and Azure services. Working knowledge of JSON, XML, and XSLT. Experience with SQL Server 2016 and Azure cloud environments. Solid understanding of GDS Service Standards and Agile delivery methodologies. Experience working ...

QA Lead Engineer - PA26Q3QAJH101

Hiring Organisation
Appcast
Location
London, UK
with the ability to work effectively across technical and business teams.Nice to Have:Experience within financial services or fintech, particularly testing financial systems, XML, JSON, FIX, SFTP, or Swift messaging.Familiarity with MCP (Model Context Protocol) integrations and AI agent workflows.Experience testing event-driven architectures, including Azure Service Bus and Azure ...

Senior Java Developer (Azure)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
right job, can work with Relational (such as Postgres) and Non-relational (DynamoDb, MongoDb) data stores and is at ease when working with JSON and XML technologies We Offer Growth opportunities including access to Udemy Flexible and autonomous working Competitive salary Annual bonus 25 days holiday + bank holidays. After ...

Director, Application Development Manager

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
level proficiency in Java and frameworks like Spring Boot for building microservices. Strong expertise with relational databases (Oracle) and data modelling (canonical data models, JSON). Deep experience with enterprise messaging platforms (Kafka, IBM MQ). Proven experience implementing AI/ML solutions (using Python or other frameworks) to solve ...

Senior Software Engineer (C++ network programming)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
with extensive experience in software development.Strong knowledge of selected programming languages: C, C++Experience with low level networking communicationExperience in working with web socket and JSON frameworksExperience in working with TCP/IP and UDP multicast network protocolsKnowledge of GitLab or GitHub or other source control systemKnowledge of JiraKnowledge of Agile ...

Interface / Integration Developer (Java - Apache)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
with IBM MQ (configuration, troubleshooting, performance tuning) Strong experience building microservices and RESTful APIs Knowledge of message formats and data transformation (XML, XSD, XSLT, JSON) Experience with SQL databases and ORM frameworks Familiarity with CI/CD pipelines (e.g., TeamCity, Git-based workflows) Comfortable working in Linux environments (bash ...

Senior Oracle Technical Consultant – DV cleared

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Oracle PaaS (Autonomous Database, VBCS, API Platform, Integration Cloud) and IaaS (Compute, Storage, Networking) concepts. Strong knowledge of REST/SOAP web services, XML, JSON, XSLT, and API design principles. Experience with Oracle Cloud Adapters, FBDI/HDL data loading templates, and BI Publisher reporting. Familiarity with security protocols (OAuth ...

Business Intelligence Developer - SQL, ETL, Power BI, DAX

Hiring Organisation
Comtecs Ltd
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP 80,000 - 90,000 Annual
experience, combined with the ability to engage confidently with business stakeholders. You will possess: Expert SQL skills including stored procedures, functions, XML and JSON data types. Strong understanding of Data Warehouse methodologies such as Kimball and Inmon. Strong Power BI report and dashboard development and DAX skills, including semantic modelling ...

Business Intelligence Developer

Hiring Organisation
Comtecs
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£90,000
experience, combined with the ability to engage confidently with business stakeholders. You will possess: Expert SQL skills including stored procedures, functions, XML and JSON data types. Strong understanding of Data Warehouse methodologies such as Kimball and Inmon. Strong Power BI report and dashboard development and DAX skills, including semantic modelling ...

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 ...

Fullstack Java Developer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
essential. Anypoint Studio, Anypoint Exchange, API Manager, Runtime Manager. Experienced in developing integrations using Mule 4 (flows, connectors, components), building and consuming APIs, handling JSON and XML payloads We Care About Our Employees' Happiness By providing: Pension Scheme - contributions matched up to 10% Private medical Cover Income Protection Life Assurance ...

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 ...

Dotnet Developer

Hiring Organisation
LanceSoft UK
Location
City of London, London, 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/ ...

Support Engineer

Hiring Organisation
Appcast
Location
London, UK
/WebSphere.Technical experience with designing systems utilising OOAD, SOA, Java, J2EE, Spring, React.js, Node JS, Hibernate, SOAP/REST web services using XML/JSON, Spring security, SpringBoot and AMQP/RabbitMQ.Experience in writing SQL query reports and creation of data correction scripts including writing stored procedures using SQL Server.An ...

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 Data Privacy & BigID Consultant

Hiring Organisation
Jobleads-UK
Location
City Of London, England, United Kingdom
basics (IAM, RBAC) Encryption, tokenization, and data masking techniques Scripting & Automation Python/Bash for automation and data profiling scripts REST API integration and JSON/XML data handling QUALIFICATIONS Experience 7+ years in data governance, privacy, or information security 4+ years in a client-facing consulting or professional services ...

Cloud Data Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Data Modelling Skills Star Schema Snowflake Schema Dimensional Modeling Data Vault Data Warehouse Design Data Lake Architecture Data Formats Experience working with: Parquet Avro JSON CSV ORC CI/CD & DevOps Git GitHub GitLab Bitbucket Jenkins GitHub Actions GitLab CI/CD AWS DevOps Tools Domain Experience (Preferred) Experience ...

Applied AI Engineer

Hiring Organisation
Appcast
Location
London, UK
Python, SQL, and tools/libraries used in agentic development like langgraph, langchain, Pydantic models, NumPy, FastAPI/MCP, etc.Ability to work with APIs, JSON, MCPs, Git or version-controlled artifacts, and lightweight automation or prototyping workflows.Excellent written and verbal communication skills, with the ability to translate business needs into ...