1 to 25 of 28 Permanent JSON Jobs in London

Senior Software Engineer

Hiring Organisation
Retelligence
Location
City of London, London, United Kingdom
systems (e.g., RabbitMQ, Kafka). Strong understanding of messaging patterns, asynchronous processing, and distributed system design. Proficient in building RESTful APIs and working with JSON/XML data formats. Experience with SQL and database design (SQL Server or similar). Familiarity with microservices architecture and containerized deployments (Docker, Kubernetes). ...

Java Web Developer

Hiring Organisation
Information Tech Consultants
Location
Greater London, England, United Kingdom
Familiarity with JUnit for writing and executing test cases Basic understanding of cloud platforms like AWS, Azure, or GCP Strong knowledge of RESTful APIs, JSON, and HTTP Experience with version control tools like Git Experienced in working within Agile/Scrum environments. Familiar with Agile tools such as JIRA, Confluence ...

Senior Java Developer - SC

Hiring Organisation
IO Associates
Location
London, United Kingdom
Employment Type
Permanent, Work From Home
with strong Java expertise. Hands-on experience with Java 8, Spring, Maven, Git, and JUnit. Strong experience developing and integrating Web APIs (REST/JSON and XML/SOAP). Proven experience delivering complex enhancement and maintenance-focused programmes. Exposure to infrastructure and tooling such as Docker, Ansible, Python ...

Senior Java Developer

Hiring Organisation
IO Associates
Location
London, United Kingdom
Employment Type
Permanent
development, with strong Java expertise Solid hands-on experience with Java 8, Spring, Maven, Git, and JUnit Strong experience with Web APIs - REST/JSON and XML/SOAP Proven ability to deliver on complex, maintenance and enhancement-focused programmes P.S.: Visa sponsorship is not available - only candidates currently residing ...

Integration Developer

Hiring Organisation
Shaw Daniels Solutions
Location
South 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 ...

QA Engineer

Hiring Organisation
Retelligence
Location
City, London, United Kingdom
Employment Type
Permanent
Salary
GBP 50,000 - 55,000 Annual
database queries. Experience in non-functional testing (e.g., performance, load, stress testing) using tools like Neoload is beneficial. Familiarity with financial system testing (XML, JSON, FIX, SFTP, or Swift) is a plus. Knowledge of QA automation methodologies, tools, and agile processes. Strong understanding of testing techniques such as Equivalence Partitioning ...

QA Engineer

Hiring Organisation
Retelligence
Location
EC2M, Coleman Street, Greater London, Bishopsgate, United Kingdom
Employment Type
Permanent
Salary
£50000 - £55000/annum + Bonus
database queries. Experience in non-functional testing (e.g., performance, load, stress testing) using tools like Neoload is beneficial. Familiarity with financial system testing (XML, JSON, FIX, SFTP, or Swift) is a plus. Knowledge of QA automation methodologies, tools, and agile processes. Strong understanding of testing techniques such as Equivalence Partitioning ...

Software Engineer - Visual Quality

Hiring Organisation
Microtech Global Ltd
Location
London, United Kingdom
Employment Type
Permanent
have significant experience developing using these technologies. - Experience using Linux as a target development platform? - Hands-on experience with technologies such as REST, HTTP, JSON and docker - Excellent communication skills and comfortable providing clear accurate progress updates and able to document requirements and work completed. - Have worked in an Agile ...

Java Full stack Developer

Hiring Organisation
KBC Technologies UK LTD
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
Competitive salary
Spring Boot Hands-on experience with Kafka and asynchronous messaging Experience with API Gateway solutions (Apigee preferred) Strong knowledge of REST APIs, JSON, OpenAPI/Swagger Experience with SQL/NoSQL databases (Oracle, PostgreSQL, MongoDB) Frontend experience with Angular or React Understanding of payment systems and financial services architecture Preferred ...

Java Developer Production Software Engineer

Hiring Organisation
PSD Group
Location
London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£85,000
years 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 ...

Java Developer

Hiring Organisation
Data Careers
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP 75,000 Annual
Java Developer Permanent Location: Home Based Salary: £70,000 - £75,000 Skills: Java 8, Spring, Maven, Git, JUnit, Web APIs (REST/JSON and XML/SOAP), SC Clearance We are looking to recruit an SC Cleared Java Developer to join a leading technology consultancy working on the upgrade, enhancement ...

Digital Platform Architect power platform

Hiring Organisation
Morgan Philips Specialist Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£60,000 - £70,000 per annum
Dataverse. Must have project experience in delivering complex solutions. Experience with some of the following development languages such as C#, .Net, JavaScript, HTML, CSS, JSON and experience working with XML based APIs. Experience within Microsoft Office 365 and associated platform products, Azure AD, SSO etc. Ability to work independently ...

Digital Platform Architect (power platform)

Hiring Organisation
MORGAN PHILIPS UK LIMITED
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£70,000
Dataverse. Must have project experience in delivering complex solutions. Experience with some of the following development languages such as C#, .Net, JavaScript, HTML, CSS, JSON and experience working with XML based APIs. Experience within Microsoft Office 365 and associated platform products, Azure AD, SSO etc. Ability to work independently ...

Principal Full Stack Engineer React, C#, MySQL, AWS, SaaS

Hiring Organisation
Smart Sourcer Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent
across squads; accountable for how software is built and shipped. Design and develop distributed, scalable microservices (C# .NET Core or Node.js) and REST/JSON APIs. Build modern React + TypeScript UIs with component-driven design, advanced state management, and reusable frameworks. Leverage AWS services (Lambda, API Gateway, SQS/ ...

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 ...

Senior React Native Engineer - London Hybrid : £100-120k+

Hiring Organisation
Hunter Bond
Location
City of London, London, United Kingdom
Bring 5+ years’ experience delivering production mobile apps for iOS and Android. Strong expertise with iOS/Android SDKs, remote data handling (REST/JSON) and third-party integrations. Solid understanding of mobile architecture, trends and best practices across the entire development lifecycle. Clear, confident communication skills — written, verbal ...

Java Developer

Hiring Organisation
Data Careers
Location
South East London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£75,000
Java Developer Permanent Location: Home Based Salary: £70,000 - £75,000 Skills: Java 8, Spring, Maven, Git, JUnit, Web APIs (REST/JSON and XML/SOAP), SC Clearance We are looking to recruit an SC Cleared Java Developer to join a leading technology consultancy working on the upgrade, enhancement … Java-based applications supporting legacy systems Contribute to iterative development within an Agile/Scrum environment Build and consume web services using REST/JSON and XML/SOAP APIs Write clean, maintainable, and well-tested code Collaborate closely with other developers, testers, and stakeholders Essential Technical Skills Java ...

iOS Developer

Hiring Organisation
YEO Messaging
Location
City of London, London, United Kingdom
SwiftUI Knowledge of mobile app architecture, MVC/MVVM, and design patterns Familiarity with version control systems such as Git Understanding of API integration, JSON, and third-party libraries Experience writing unit and UI tests to ensure robustness Experience with creating SDK's for deployment across multiple applications Strong problem ...

Technical Business Analyst

Hiring Organisation
Marshall Wolfe
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£50,000 - £60,000 per annum
Understanding of Large Language Models (LLMs) and prompt-engineering principles. Highly organised, proactive, and able to manage multiple projects simultaneously. Preferred experience: Familiarity with JSON, XML, or other structured data formats. Experience with rules engines, decision management systems, or low-code/BPM tools. Understanding of knowledge representation, logic ...

Senior Frontend Developer

Hiring Organisation
Durlston Partners
Location
London, UK
Employment Type
Full-time
Totally Annoy You: A Backend That Doesn't Suck: Their devs speak more than just "protocol." They promise not to send you JSON that looks like it was formatted by a feral raccoon. (We have this in writing) Real Problems, Not Pretend Ones: Forget endless todo apps. ...

QA Engineer

Hiring Organisation
Black Cow Technology
Location
South London, UK
Employment Type
Full-time
understanding of casino game mechanics (RNG behavior, RTP verification, maths balancing, jackpot configuration, bonus rounds). Practical knowledge of RESTful and event driven APIs, JSON validation, server logs, and platform communication flows. Experience with common QA toolsets. Familiarity with regulatory certification and release management processes in emerging markets like Ontario ...

Data Modeler

Hiring Organisation
Harnham
Location
City of London, London, United Kingdom
ensure data models align with business and technical goals. Leveraging tools such as ERWin, Sparx, RSA, Visio , and handling semi-structured data formats (JSON, XML, Parquet). SKILLS AND EXPERIENCE The successful Data Modeller will have the following skills and experience: Proven experience in data modelling within consulting or financial ...

Full Stack Engineer (Next.js

Hiring Organisation
Angry Swan Labs
Location
South London, UK
Employment Type
Full-time
between the web session and external connected clients. Functionality: Implement a secure pairing flow (e.g., code-based) that facilitates the bi-directional sync of JSON state data between the web app and remote sessions. D. Interactive 2D Overlay Requirement: A manipulation layer for defining regions of interest. Functionality: Implementation ...

Product Manager / Insurance Platform Product Owner

Hiring Organisation
AWD Online
Location
Central London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£60,000
communicate effectively with both technical and non-technical stakeholders DESIRABLE Working knowledge of Power BI or similar reporting tools Experience working with APIs, JSON, Excel-based schemas or structured data formats An interest in LLMs and Agentic AI within insurance or operational environments HOW TO APPLY To be considered ...

Product Manager / Insurance Platform Product Owner

Hiring Organisation
AWD online
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£60,000 per annum
communicate effectively with both technical and non-technical stakeholders DESIRABLE Working knowledge of Power BI or similar reporting tools Experience working with APIs, JSON, Excel-based schemas or structured data formats An interest in LLMs and Agentic AI within insurance or operational environments HOW TO APPLY To be considered ...