1 to 25 of 41 Permanent JSON Jobs in London

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 ...

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 ...

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 ...

such as HTML, CSS and JavaScript. • Hands‐on experience with tools such as Selenium, Playwright or similar automation frameworks. • Solid understanding of API testing, JSON/XML formats and tools such as Postman or Swagger. • Familiarity with CI/CD pipelines and version control. • Comfortable working in data‐rich environments ...

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 ...

building UI tests with tools such as Selenium or Playwright. * Working knowledge of test frameworks such as JUnit or TestNG. * Understanding of APIs, HTTP, JSON and related testing tools. * Comfortable working in data-rich environments and validating data accuracy. * Experience using AI tools within your engineering workflow to accelerate development ...

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 ...

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 ...

database querying Experience handling large datasets and optimizing queries Experience with testing (unit, integration, performance, etc .) Knowledge of data formats (JSON/Avro/Parquet) Strong analytical and problem-solving skills Ability to simplify complex concepts for stakeholders Strong attention to detail and data quality focus Excellent communication skills ...

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 ...

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 ...

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. ...

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 ...

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 ...

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/ ...

Strong knowledge of SQL and databases Understanding of handling large data sets efficiently Experience with testing (unit, integration, etc.) Familiarity with data formats like JSON, Avro, Parquet Good analytical and problem-solving skills Ability to explain complex data in simple terms Strong attention to detail and communication skills Nice ...

migration/transformation programmes* Expertise across conceptual, logical, and physical modelling* Strong stakeholder management skills* Experience working in Agile environments* Knowledge of UML, RDBMS, JSON/XML* Knowledge/experience of Erwin Desirable: * Knowledge of industry data standards (e.g. fpML, FIX, FIBO)* Experience with ontologies (RDF/OWL/ ...

/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 ...

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 ...

Rails developer with deep expertise in PostgreSQL and background processing via Sidekiq and Redis. You should be highly proficient in building RESTful APIs, managing JSON serialisation, and implementing secure authentication methods like JWT or SSO. Beyond coding, you will possess knowledge of Docker and AWS, alongside the communication skills required ...

APIs (Claude, GPT, etc.) programmatically from application code. You will build workers that use AI for classification, scoring, and reasoning — constructing structured prompts, parsing JSON responses, handling errors, and managing the boundary between what the AI decides and what the code enforces. This is not prompt engineering in a chat ...

OpenSSH, Kubernetes and service mesh certificate architectures (mTLS, SPIFFE/SPIRE style identities). Proficiency with scripting and automation (Python, PowerShell, Bash, Go, JSON) and IaC tools (Azure DevOps, Terraform, Ansible). Experience modernising TLS certificate and SSH key management processes, uplifting protocol versions, and improving trust configurations. Knowledge ...

migrations. Shape and document metadata, lineage, catalogues and source-to-target mapping. Contribute to ETL design and data movement patterns across platforms. Work with JSON, XML, Parquet and other semi-structured formats used across financial systems. Engage senior stakeholders and guide best practice within multidisciplinary teams. Principal level: provide thought ...

engineering improvements Tech stack: ⚙️ Ruby on Rails ⚙️ Relational databases ⚙️ Background processing (eg. Sidekiq/Redis) ⚙️ Cloud infrastructure (AWS or similar) ⚙️ APIs (REST/JSON) If you’re a Full Stack/Back End Engineer who enjoys owning production systems and building reliable, scalable software that has real world impact, apply ...

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 ...