14 of 14 JSON Jobs in Central London

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 ...

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. ...

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 ...

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 ...

Implementation Manager

Hiring Organisation
Trevose Partners
Location
City of London, London, United Kingdom
Experience in implementation, onboarding, or client delivery within financial technology Prior team lead or supervisory experience Hands-on experience working with FIX, XML, or JSON for client connectivity/integrations Understanding of electronic trading workflows and system integrations Strong client-facing experience and ability to manage multiple projects Clear communication ...

Scala Developer (Remote)

Hiring Organisation
Stealth iT Consulting
Location
Central London / West End, London, United Kingdom
Solid understanding of functional programming concepts and idiomatic Scala (e.g., immutability, monads, cats/Scalaz familiarity advantageous). Experience designing and consuming REST APIs, JSON validation/serialization (Play JSON, Circe). Experience with relational databases (PostgreSQL) and/or NoSQL (MongoDB), including schema design and query optimisation. Proven experience ...

Scala Developer - Remote Contract - Outside IR35

Hiring Organisation
Stealth iT Consulting
Location
City of London, London, United Kingdom
functional programming concepts and idiomatic Scala (immutability, monads; familiarity with Cats or Scalaz is a plus). Experience designing and consuming REST APIs , including JSON validation/serialization (Play JSON, Circe). Proficiency with relational databases (PostgreSQL) and/or NoSQL (MongoDB), including schema design and query optimization. Proven experience ...

Intelligent Automation Engineer

Hiring Organisation
Rathbones Group Plc
Location
City of London, London, United Kingdom
Employment Type
Permanent
ImplementPower Automate(cloud/desktop) flows andPower Appswhere appropriate; create reusable connectors/components; apply DLP policies. Systems integration Integrate with APIs (REST/JSON), SharePoint/Teams/Outlook, CRM, data platforms and event triggers; handle identity, permissions and audit. Quality, reliability & support Write testable solutions, instrument for telemetry … APIs/connectors; permissions & governance. Power PlatformPower Automate(cloud/desktop),Power Apps(canvas/model-driven desirable), DLP, custom connectors. Integration REST/JSON, webhooks, OAuth/Entra ID, basicSQL; event-driven patterns; error/exception strategies. Dev fundamentals Git/Azure DevOps, CI/CD, environment strategy, secure ...

Configuration Engineer

Hiring Organisation
EXL Service
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
focuses on building and maintaining configuration-driven solutions that power enterprise-grade insurance SaaS platforms. You will translate business and functional requirements into structured JSON and YAML configurations, enabling dynamic forms, workflows and rule engines without heavy custom code. Working closely with business analysts, developers and QA teams, you will … particularly exposure to policy administration, underwriting, claims or insurance workflow systems. As part of your duties, you will be responsible for: Configure and manage JSON and YAML-based configurations for forms, rules and workflows Define dynamic UI forms, field validations and conditional logic using configuration files Implement and maintain business ...

SharePoint Engineer

Hiring Organisation
McCabe & Barton
Location
City of London, London, United Kingdom
sites. Customize Intranet and sites with company branding (logos, colors, navigation, headers/footers) using out-of-the-box features, CSS/JSON formatting, or Power Apps/Power Automate integrations. Enhance site structures, search refiners, audience targeting, and usability for better adoption post-migration. Configure and maintain SharePoint Online … ShareGate, SPMT, AvePoint, or similar). Strong understanding of Microsoft 365 security/compliance: Purview, sensitivity labels, retention, DLP, information protection. Branding/customization: JSON formatting, themes, SPFx development (JavaScript/TypeScript, React). Experience or understanding of API based integrations and automations Copilot or AI tool knowledge or awareness. ...

Power Platform Developer

Hiring Organisation
ARM
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £540/day Inside IR35
Power Platform Developer 3 Months 5 Days per week on site in Canary Wharf £(Apply online only) per day (Inside IR35 My client, in the financial services industry, are looking for a Power Platform Developer ...

Sharepoint Developer

Hiring Organisation
Marks Sattin
Location
City of London, London, United Kingdom
role focuses on unstructured data (documents, libraries, metadata, permissions, versions), security/compliance controls (data residency, Purview, labels, DLP), branding/customisation (SPFx, JSON, themes) and automation (PowerShell, PnP, Power Automate) to deliver low-risk, user-friendly intranets and collaboration platforms. Key responsibilities Lead end-to-end content migrations from … Implement modern SharePoint architecture: site collections, hub sites, site templates, modern pages and SPFx web parts/extensions. Deliver branding and UX: custom themes, JSON/CSS formatting, navigation, headers/footers and Power Apps/Power Automate integrations. Automate repetitive admin and migration tasks using PowerShell (PnP), Power Automate ...