17 of 17 Permanent JSON Jobs in London

Java Specialist

Hiring Organisation
Pyramid Consulting, Inc
Location
City of London, London, United Kingdom
hands-on skills in: Java 8/17, Spring, Spring Boot, Hibernate, JEE, MVC, Swing, JSP, Webservices (REST/SOAP), Angular/AngularJS, jQuery, JSON, HTML, CSS, XSLT Expertise with: Tomcat, JBoss EAP, Apache, SQL, Oracle, PL/SQL, XML, Maven, Ant, CI/CD (Azure Pipeline), Jira, Subversion Experience ...

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 ...

Frontend Developer

Hiring Organisation
Aqilla
Location
London, England, United Kingdom
with modern Front End frameworks and tooling Proven ability to build accessible, responsive, and performant interfaces Experience consuming and integrating REST APIs (HTTP methods, JSON) Familiarity with Git , CI/CD pipelines, and Agile methodologies Good understanding of UX and user-centred design principles Strong analytical and problem-solving skills ...

Java Full Stack Developer

Hiring Organisation
Syntax Consultancy Ltd
Location
Croydon, Greater London, United Kingdom
Employment Type
Permanent
Salary
£65000 - £75000/annum + Benefits + Bonus
Java 8/11 , Spring Boot, Spring Framework and Micro-services development experience. JavaScript, NodeJS, ReactJS preferred and REST API, PostgreSQL/NoSQL databases, JSON and XML. AWS Cloud environments including: ECS, EKS, API Gateway + Serverless. DevOps and CI/CD technologies , including hands-on experience of Jenkins, Docker ...

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 ...

Senior Android App Developer

Hiring Organisation
Stott & May Professional Search Limited
Location
London, United Kingdom
Employment Type
Permanent
Salary
£90,000
Strong proficiency in Kotlin and Android SDKs, with a deep understanding of Jetpack libraries, Compose and modern Android architecture components. * 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 ...

Principal Engineer React, Typescript, C#, AWS (Serverless), MySQL

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/ ...

Python Developer

Hiring Organisation
Insight Global
Location
City of London, London, United Kingdom
development experience Strong understanding of monitoring platforms and scripting Demonstrated data manipulation skills; ensuring data integrity Experience with middleware tools, preferably AMPS Proficiency in JSON, React, REST APIs, FastAPI, Unix/Linux, OpenShift, Docker, Kubernetes Experience with unit testing and writing clear Jira tickets Excellent interpersonal communication skills Plusses: Previous ...

Full Stack Developer – AI & Automation (UK Remote)

Hiring Organisation
Stanley House Consulting
Location
City of London, London, United Kingdom
Storage) AI/ML: OpenAI, Anthropic Claude, LangChain, Vector Databases Deployment: Vercel, GCP Must-Have Skills Core Languages: TypeScript, JavaScript, Python Databases: MySQL, PostgreSQL, JSON Frameworks: Next.js & React, incl. App Router (Server/Client Components, Server Actions) Proficiency in Supabase (database design, RLS, auth flows) Third-party API App Integration ...

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. ...

Data Modeler

Hiring Organisation
Harnham
Location
London Area, 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
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 ...

Senior AI Engineer

Hiring Organisation
Chambers and Partners
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
Competitive salary
expected interview topics/questions. Main Duties and Responsibilities Data & Retrieval Build robust ingestion pipelines for PDFs/Word/Excel/Audio/JSON and semi-structured sources. Design RAG systems: chunking strategies, document schemas, metadata, hybrid/dense retrieval, re-ranking, and grounding. Manage vector/keyword indexes … Design, build, and maintain traditional ML and LLM models and pipelines. Build LLM apps using LangGraph/LangChain: tools/function calling, structured outputs (JSON Schema), agents, and multi-step reasoning. Implement ASR/TTS and multimodal where relevant (e.g., Whisper). Choose customization paths pragmatically: prompt engineering, system prompts ...