Full-Stack Software Engineer with OAuth

About the Position

We are looking for a Full-Stack Software Engineer with OAuth to join our team at Endava, in partnership with WTW. You will be part of a dedicated engineering team responsible for designing, developing, and evolving the Authentication and Authorization capability used across multiple products and engineering teams.

Responsibilities

• Identity Platform Development

  • Design, develop, and maintain authentication and authorization services using modern .NET technologies.
  • Develop reusable platform services supporting secure authentication and authorization across multiple business applications.
  • Build scalable REST APIs and integration services used throughout the organization.
  • Develop and maintain Angular-based administration portals supporting user, group, and permission management.
  • Contribute to the evolution of Fine-Grained Authorization (FGA) capabilities and centralized access management services.

• Platform Services & Developer Experience

  • Develop reusable SDKs, libraries, and APIs that simplify integration with the enterprise identity platform.
  • Build developer tooling that improves onboarding and adoption of shared authentication services.
  • Improve developer experience by simplifying authentication, authorization, and platform integration.
  • Produce and maintain technical documentation supporting engineering teams consuming the platform.
  • Help minimize breaking changes by designing stable, reusable platform interfaces.

• Cloud & Platform Engineering

  • Develop cloud-native services running on Microsoft Azure.
  • Build and maintain reverse proxy capabilities using Azure API Management.
  • Support Infrastructure as Code implementation using OpenTofu/Terraform.
  • Contribute to CI/CD pipelines and deployment automation using Azure DevOps.
  • Support continuous improvements in platform scalability, security, and operational resilience.

• Engineering Excellence

  • Write unit, integration, and automated tests ensuring platform quality and reliability.
  • Participate in peer reviews, architecture discussions, and technical design sessions.
  • Promote engineering best practices including Clean Code, automated testing, and secure software development.
  • Collaborate with Product Owners, Architects, QA Engineers, and Platform Engineers to deliver high-quality platform capabilities.

• Operations & Collaboration

  • Participate in third-line production support and on-call rotation.
  • Investigate production issues and contribute to platform reliability improvements.
  • Work closely with multiple product teams integrating with the platform.
  • Share knowledge and contribute to establishing long-term Endava ownership of the Authentication & Authorization capability.

Requirements

• Software Engineering

  • 4+ years of commercial software development experience using C# and modern.NET.
  • Strong experience designing and developing REST APIs.
  • Experience building scalable enterprise applications or shared platform services.
  • Strong knowledge of object-oriented programming and modern software design principles.

• Identity & Security

  • Strong understanding of OAuth 2.0, OpenID Connect (OIDC), and JWT.
  • Good understanding of modern authentication and authorization concepts.
  • Experience integrating applications with enterprise identity providers.
  • Understanding of secure API design and identity-based access control.

• Cloud & Platform Engineering

  • Experience developing cloud-native applications on Microsoft Azure.
  • Experience with Azure DevOps, Git, and CI/CD pipelines.
  • Understanding of Infrastructure as Code principles, with the ability and willingness to work with tools such as OpenTofu or Terraform.
  • Understanding of Azure API Management or similar API Gateway technologies.

• Front-End Development

  • Experience developing Angular applications using TypeScript.
  • Experience building administrative or developer-facing web applications.

• Engineering Practices

  • Experience writing automated tests (unit, integration, and API testing).
  • Experience working in Agile Scrum teams.
  • Strong communication and collaboration skills.
  • Ability to work effectively across multiple product teams.

Nice to Have

• Auth0
• Fine-Grained Authorization (FGA)
• Google Zanzibar authorization model
• Azure API Management (APIM)
• SCIM integrations
• Identity Federation
• Datadog
• Playwright
• Trivy
• GitLeaks
• Invicti
• Experience building reusable developer platforms
• Experience working with enterprise shared services

We Offer

• Competitive salary starting from PLN 15,267 PLN Gross per month.
• Comprehensive benefits including private medical insurance, dental plan, and glasses reimbursement.
• Opportunity to work in a dynamic, inclusive, and respectful environment.
• Career growth and professional development opportunities.

About the Company

At Endava, we harness technology to drive meaningful change. By combining AI-native engineering, deep industry expertise, and a people-centric mindset, we partner with leading organizations to solve complex business challenges and create digital products and platforms that make a lasting impact.

From strategy and design to engineering and operations, we help our customers accelerate innovation and transform their businesses. Join us and be part of a global team delivering work that matters.

At Endava, we’re committed to creating an open, inclusive, and respectful environment where everyone feels safe, valued, and empowered to be their best. We welcome applications from people of all backgrounds, experiences, and perspectives-because we know that inclusive teams help us deliver smarter, more innovative solutions for our customers. Hiring decisions are based on merit, skills, qualifications, and potential. If you need adjustments or support during the recruitment process, please let us know.