14 of 14 OpenAPI Jobs in the South East

Mid-Level Java Developer

Hiring Organisation
Halliburton
Location
Abingdon, Oxfordshire, UK
Employment Type
Full-time
Experience with Java and related frameworks (SpringBoot, Eclipse RCP, OData, Hibernate, JPA, REST, etc.) Backend development including REST APIs with Spring Boot, Swagger/OpenAPI specifications, Spring Security, OAuth2/OIDC, JWT. Git-based workflows and Gitlab CI/CD pipelines. Experience working in an Agile development environment (Scrum ...

Principal Java Engineer

Location
Wallingford, England, United Kingdom
Framework 6/Spring Boot 3.5 Hibernate ORM 6.6+, JPA Apache Tomcat 11, IntelliJ IDEA AI Tooling (Claude, Codex, Gitlab Duo, etc) REST APIs, OpenAPI, Microservices, Event-driven architecture (RabbitMQ) Containers, Docker, AWS, Linux CI/CD with GitLab Pipelines & Jenkins Observability: logging, metrics and monitoring MySQL, Apache Solr ...

Backend Engineer (Java)

Location
Southampton, England, United Kingdom
ensure APIs, events, and data flows are compliant, secure, and well-governed. Work with frontend and mobile engineers to define clear, well-documented APIs (OpenAPI/Swagger). Leadership & Mentorship Participate in architectural discussions, design reviews, and incident retrospectives, bringing strong backend expertise. What are we looking for? Technical ...

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 ...

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
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 ...

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 ...

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/ ...

Technical Product Owner

Location
Southampton, England, United Kingdom
including API lifecycle, versioning, developer experience, and consumer onboarding. Familiarity with the Microsoft Azure ecosystem (Azure DevOps, Azure API Management) and modern API tooling (OpenAPI). Experience managing delivery dependencies on third‐party platform/SaaS providers (e.g. wealth‐platform providers such as FNZ). Experience working closely with ...

QA Software Tester - AI Testing

Location
Basingstoke, England, United Kingdom
working within an Agile environment. API testing experience with Postman Automation Testing experience with Playwright, Selenium, TestComplete or similar Desirable Experience with Swagger/OpenAPI, C#, CI/CD, SaaS platforms or hardware/device integrations would be advantageous. Why Apply? This is an opportunity to join a technically ...

Software Engineer Consultant

Hiring Organisation
Eden James Consulting Limited
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
Salary negotiable
We are recruiting for a Software Engineer Consultant on behalf of one of the UK's fastest-growing technology consultancies, ranked in the Financial Times FT1000 Europe's Fastest-Growing Companies list in both 2025 ...

Software Engineer - Space Domain Awareness

Hiring Organisation
GMV
Location
Didcot, Oxfordshire, UK
Employment Type
Full-time
institutional customers, tasks will include: Design, develop and maintain Java micro-services within an agile delivery environment. Develop and evolve RESTful APIs using OpenAPI and JSON.Implement automated tests at different levels to support robust and maintainable software delivery. Contribute to the integration of software components such as databases, workflow … agile projectsProficient in Java. Knowledge of automated testingStrong experience in development and automated testing of Java micro-services. Recent experience developing RESTful APIs using OpenAPI and JSON.Excellent teamworking and communication skills. Pragmatic, adaptable and delivery-focused profile, able to respond to changing requirements and priorities. This role requires ...

Technical Business Analyst

Hiring Organisation
Deerfoot Recruitment Solutions Limited
Location
Stanwell Moor, Middlesex, United Kingdom
Employment Type
Contract
Contract Rate
GBP 350 - 420 Daily
airline customers, with a real say in how a complex set of connected products behaves. The role is properly technical: you'll read OpenAPI specifications, query databases and contribute to solution design, using Jira, Confluence and GitHub. It's a 12 month contract, hybrid with half your time … stories, business rules, process flows, acceptance criteria and functional specifications Analysing APIs, integrations, data flows and system interactions across interconnected products, reading Swagger and OpenAPI specifications Writing and running database queries to investigate data, validate behaviour and support analysis Contributing to solution design alongside Architects and Engineers Validating requirements ...

Technical Business Analyst

Hiring Organisation
Deerfoot Recruitment Solutions Limited
Location
Hounslow, London, Stanwell Moor, Surrey, United Kingdom
Employment Type
Contract
Contract Rate
£350 - £420/day Hybrid Working
airline customers, with a real say in how a complex set of connected products behaves. The role is properly technical: you'll read OpenAPI specifications, query databases and contribute to solution design, using Jira, Confluence and GitHub. It's a 12 month contract, hybrid with half your time … stories, business rules, process flows, acceptance criteria and functional specifications Analysing APIs, integrations, data flows and system interactions across interconnected products, reading Swagger and OpenAPI specifications Writing and running database queries to investigate data, validate behaviour and support analysis Contributing to solution design alongside Architects and Engineers Validating requirements ...