76 to 100 of 133 OpenAPI Jobs in England

Mid-Level QA Engineer

Location
Basingstoke, England, United Kingdom
TestComplete and other automation tools preferred. Experience testing desktop and web applications preferred. Experience with API testing tools such as Postman or Swagger/OpenAPI preferred. Development experience or familiarity with C# preferred. Familiarity with cloud-hosted applications and distributed system architectures preferred. Experience using AI-assisted development ...

Higher Scientist - Informatics

Location
Greater London, England, United Kingdom
technologies, ontologies, knowledge representation, knowledge graphs or Natural Language Processing Experience in accessing and exposing data through Rest APIs, e.g. through application of FastAPI, OpenAPI etc. Experience in RDF, OWL, SPARQL Experience with graph databases (e.g. GraphDB, Neo4J) Knowledge of existing ontologies such as Schema.org, PROV-O, QUDT, SOSA ...

Full-stack Lead Software Engineer Application Owner

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent
with relational databases such as MySQL or similar, along with exposure to cloud platforms, infrastructure-as-code practices, and API documentation standards such as OpenAPI/Swagger Demonstrated understanding of application lifecycle management practices, including familiarity with application registration, governance tooling, and compliance requirements within a regulated enterprise technology ...

Full-stack Lead Software Engineer — Application Owner

Location
Greater London, England, United Kingdom
with relational databases such as MySQL or similar, along with exposure to cloud platforms, infrastructure-as-code practices, and API documentation standards such as OpenAPI/Swagger Demonstrated understanding of application lifecycle management practices, including familiarity with application registration, governance tooling, and compliance requirements within a regulated enterprise technology ...

Software Developer C and Linux

Hiring Organisation
System Recruitment
Location
Lymington, Hampshire, South East, United Kingdom
Employment Type
Contract
Contract Rate
£60,000
level Understanding of secure configuration delivery and deployment auditability of newly provisioned systems API Design & Implementation (maybe): Experience/Familiarity with: Working with OpenAPI (Swagger) specifications to define service interfaces Implementing APIs in C or similarly low-level environments, without reliance on full-stack frameworks Designing for defensive input ...

Software Developer C and Linux

Location
Pennington, England, United Kingdom
level Understanding of secure configuration delivery and deployment auditability of newly provisioned systems API Design & Implementation (maybe): Experience/Familiarity with: Working with OpenAPI (Swagger) specifications to define service interfaces Implementing APIs in C or similarly low-level environments, without reliance on full-stack frameworks Designing for defensive input ...

Software Developer C and Linux

Hiring Organisation
System Recruitment
Location
Lymington, Hampshire, UK
level Understanding of secure configuration xehkeey delivery and deployment auditability of newly provisioned systems API Design & Implementation (maybe): Experience/Familiarity with: Working with OpenAPI (Swagger) specifications to define service interfaces Implementing APIs in C or similarly low-level environments, without reliance on full-stack frameworks Designing for defensive ...

Front End Developer

Location
Telford, England, United Kingdom
component-library development using custom design patterns, encompassing MUI, Storybook and Figma. Runtime validation and contract-first API integration, for example Zod and OpenAPI-generated types. Authentication, authorisation and secure session management using OAuth 2.0/OpenID Connect. CI/CD, dependency management and frontend security practices. Experience working ...

Tech Lead - AWS Cloud Migration

Location
Greater London, England, United Kingdom
core libraries (e.g., Apache Commons, Guava). Modern Microservices (Nice to Have): Familiarity with microservices architecture and related tooling (e.g., Docker, Kubernetes, Swagger/OpenAPI). Public Sector Context (Nice to Have): Prior experience delivering digital transformation or cloud projects within the UK public sector. SOME THINGS ...

Front End Developer

Hiring Organisation
Experis
Location
Telford, Shropshire, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £579/day
component-library development using custom design patterns, encompassing MUI, Storybook and Figma. Runtime validation and contract-first API integration, for example Zod and OpenAPI-generated types. Authentication, authorisation and secure session management using OAuth 2.0/OpenID Connect. CI/CD, dependency management and frontend security practices. Experience working ...

SAP Integration Analyst

Hiring Organisation
TXP Technology x People
Location
Telford, Shropshire, United Kingdom
Employment Type
Full-Time
Salary
£500.00 per day
analytical approach with strong attention to detail. Desirable Experience API-led and event-driven integration architectures. · REST, SOAP, messaging, and file-based integration technologies. · OpenAPI specifications and API management platforms. · Cloud migration, application modernisation, or data centre exit programmes. · Dependency mapping and application portfolio assessment. · Jira, Azure DevOps, Confluence ...

SAP Integration Analyst

Hiring Organisation
TXP
Location
Telford, Shropshire, West Midlands, United Kingdom
Employment Type
Contract
Contract Rate
£0.00 - £500 per day
analytical approach with strong attention to detail. Desirable Experience API-led and event-driven integration architectures. REST, SOAP, messaging, and file-based integration technologies. OpenAPI specifications and API management platforms. Cloud migration, application modernisation, or data centre exit programmes. Dependency mapping and application portfolio assessment. Jira, Azure DevOps, Confluence ...

Packet Core Test Engineer

Location
Slough, England, United Kingdom
automation.**Proficiency in networking protocols and procedures:*** Core Signalling Protocols: GTPv1/v2, NGAP, Diameter, PFCP, SBI (including HTTP/2, REST/JSON, OpenAPI)* Traffic and Transport: IP (IPv4/IPv6), UDP, TCP, SCTP, GRE* Quality of Service and Policy: 5G QoS Flow, QFI, PCC (Policy and Charging ...

Packet Core Test Engineer

Location
Abingdon, England, United Kingdom
equivalents).Proficiency in networking protocols and procedures:Core Signalling Protocols: GTPv1/v2, NGAP, Diameter, PFCP, SBI (including HTTP/2, REST/JSON, OpenAPI)Traffic and Transport: IP (IPv4/IPv6), UDP, TCP, SCTP, GREQuality of Service and Policy: 5G QoS Flow, QFI, PCC (Policy and Charging Control ...

Packet Core Test Engineer

Location
Reading, England, United Kingdom
.**Proficiency in networking protocols and procedures:*** Core Signalling Protocols: GTPv1/v2, NGAP, Diameter, PFCP, SBI (including HTTP/2, REST/JSON, OpenAPI)* Traffic and Transport: IP (IPv4/IPv6), UDP, TCP, SCTP, GRE* Quality of Service and Policy: 5G QoS Flow, QFI, PCC (Policy and Charging ...

Python Engineer (Terminal/Modelling/Data)

Location
Greater London, England, United Kingdom
have Experience with LLM‐powered applications: RAG pipelines, tool‐calling architectures, or agentic systems. Experience designing external‐facing APIs, including versioning, backwards compatibility, and OpenAPI/REST standards. Familiarity with data infrastructure such as Airflow, Spark, Iceberg, or Kafka. Experience with energy markets. Modo Energy is an equal opportunity ...

Python Engineer (AI/Platform/Modelling/Data)

Location
Greater London, England, United Kingdom
have Experience with LLM-powered applications: RAG pipelines, tool-calling architectures, or agentic systems. Experience designing external-facing APIs, including versioning, backwards compatibility, and OpenAPI/REST standards. Familiarity with data infrastructure such as Airflow, Spark, Iceberg, or Kafka. Experience with energy markets. Equal Opportunity Modo Energy ...

Lead Java Engineer

Hiring Organisation
FDM Group
Location
Telford, Shropshire, United Kingdom
Employment Type
Full-Time
Salary
£85,000 - £90,000 per annum
/CD pipelines, and DevOps practices Experience using Maven for dependency management and build automation Experience with Mockito and automated testing frameworks Knowledge of OpenAPI specifications and API-first development approaches Experience with Helm and containerised deployments Knowledge of Kibana and application monitoring tools Experience with Shell Scripting … contributing to technology strategy, architecture roadmaps, and engineering governance Technologies Core Technologies Java Spring Boot JUnit Desirable Technologies JPA Maven Mockito SQL AWS GitLab OpenAPI Helm Kibana Shell Scripting About Us FDM is an award-winning global leader in tech and business talent solutions, backed by more than ...

Test Engineer

Hiring Organisation
SRG
Location
Manchester, Lancashire, United Kingdom
Employment Type
Full-Time
Salary
£40,000 - £45,000 per annum
troubleshooting and problem-solving skills. Ability to balance quality, risk and delivery timescales effectively. Desirable Experience with test automation tools and frameworks. Knowledge of OpenAPI specifications. Experience supporting automation strategies within Agile teams. What's in It for You? Salary of £40,000 - £45,000 Generous discretionary bonus scheme ...

Mobile Engineer

Location
City Of London, England, United Kingdom
Backend and API Tracing a request from UI through the mobile networking layer to the backend service and back REST/GraphQL/gRPC, OpenAPI and contract inspection, API gateway and BFF patterns OAuth 2.0/OIDC token flows as implemented on device Third-party SDK inventory and assessment ...

Graduate Software Tester

Hiring Organisation
Team Energy
Location
Milton Keynes, Buckinghamshire, United Kingdom, Loughton
Employment Type
Permanent
Salary
£26500 - £30000/annum Profit Share
have strong communication skills and are comfortable engaging with a wide range of stakeholders Languages/Specs: Java/Groovy, SQL, Swagger/OpenAPI Interfaces: Web, API, Messages/Events, DB Dev Lifecyle: Maven, GIT/BitBucket, Jira Cloud, Zephyr, ReadyAPI, jMeter Testing Types: API, Web, Security/ ...

Head of Engineering (F/H/X)

Location
Greater London, England, United Kingdom
interview: Backend & platform : Node.js/TypeScript, mainly NestJS, with Prisma and Kysely on the data side, exposed via GraphQL (Apollo) and REST documented with OpenAPI/Swagger. Frontend : React (18/19) in TypeScript, Vite, with Chakra UI, MUI and Radix UI depending on the project, Redux Toolkit ...

Senior Software Engineer Python

Hiring Organisation
MarkIT Placements
Location
Aston Tirrold, Oxfordshire, UK
Focus) Design and evolve scalable backend services in Python using FastAPI for high-availability, high-throughput workloads. Build well-versioned RESTful APIs aligned to OpenAPI/Swagger, with strong conventions for consistency, idempotency, and backward compatibility. Implement authentication and authorization using OAuth2/OIDC, session management, and fine-grained … experience, with a strong focus on backend development in Python and with event-driven architectures. Proven experience designing and operating production REST APIs with OpenAPI/Swagger. Deep understanding of relational database design, indexing, performance tuning, and migrations (PostgreSQL). Proficiency with containerisation (Docker) and Git-based workflows. Experience ...

Full Stack Developer

Location
City of Westminster, England, United Kingdom
Role Overview We are seeking an experienced Full Stack Developer with strong expertise in Node.js , Next.js , Angular , and cloud-native microservices . The ideal candidate will have a proven track record in designing, developing, and ...

Senior Full-Stack Engineer

Location
Greater London, England, United Kingdom
from data model and API design through to frontend implementation. Design and build robust, scalable APIs in TypeScript and Node.js, published in OpenAPI format. Architect resilient distributed systems and third‐party integrations, with sound error handling, failure mode mitigation and transaction control. Work with FHIR R4 resources and clinical ...