SSO and Authentication Integration

Single Sign-On and modern authentication systems built using OAuth2 and OpenID Connect - secure by default, unified across every platform you use.

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SSO and Authentication Integration

We design and implement Single Sign-On and modern authentication systems for businesses across the UK and Isle of Man. Unified login across your web applications, mobile apps, customer portals, and internal tools - using modern identity standards that are secure, maintainable, and built to work across the platforms your business relies on.

Authentication is one of the areas of software development where the consequences of getting it wrong are most severe and most visible. A poorly implemented authentication system exposes your users' accounts to compromise, creates friction that drives users away, and produces the kind of security incident that damages business reputation in ways that are hard to recover from. We build authentication systems that are secure by default, not secure as an afterthought.

Every authentication system we build is designed and delivered personally by Owen Jones, OLXR's founder and lead engineer. We implement SSO and authentication across a wide range of application types - from customer-facing SaaS platforms to internal business tools to mobile applications - and we bring that practical experience to every authentication engagement.

Who This Is For

Businesses with multiple applications that require separate logins and want to unify the authentication experience for their users or team
Organisations implementing a new customer-facing platform that needs secure, standards-compliant user authentication from day one
Companies whose existing authentication implementation has security concerns or does not meet current standards
Businesses adding a mobile application to an existing web platform and needing authentication that works consistently across both
Organisations in regulated industries where authentication standards, audit trails, and access controls are compliance requirements
Development teams that need a properly implemented identity layer rather than a quick authentication bolt-on

What We Deliver

Single Sign-On Implementation

One login that works across all your applications, using OAuth2 and OpenID Connect standards.

Social and Enterprise Login

Google, Microsoft, Apple, and other identity provider integrations for user and employee login.

Multi-Factor Authentication

TOTP, SMS, and authenticator app support built correctly into your authentication flow.

Role-Based Access Control

Permissions and access levels enforced at the identity layer across all connected applications.

Session Management

Secure session handling, token refresh, and logout behaviour implemented correctly across all platforms.

Mobile Authentication

Biometric login, secure token storage, and session management for iOS and Android applications.

Audit Logging

Complete records of authentication events for security monitoring and compliance requirements.

Legacy Application Bridging

SSO extended to applications that do not natively support modern identity standards.

Our Approach

1
Use Standards, Not Custom Solutions

Authentication is an area where custom implementations almost always create security problems. We implement authentication using established open standards - OAuth2 for authorisation, OpenID Connect for identity, and proven identity providers rather than custom token systems. Standards-based authentication is auditable, well-understood, and benefits from the security scrutiny of the entire industry. A custom authentication system benefits from none of that.

2
Design the Identity Model First

Before implementing any authentication system, we design the identity model - what a user is, what roles and permissions exist, how identity maps to access across different applications, and how the model needs to evolve as your business grows. An identity model designed correctly from the start can be extended to new applications and new permission requirements cleanly. One designed without that foresight requires painful rework every time your requirements change.

3
Security by Default

Every authentication system we build is secure by default - not secure when configured correctly, which is a common failure mode. Secure defaults mean that the system is resistant to common attacks out of the box: brute force protection, secure session handling, proper token storage, protection against CSRF and XSS, and secure credential storage using appropriate hashing algorithms. Security is not a feature we add - it is a standard of how we build.

Why Choose OLXR

Authentication failures affect every user of a system simultaneously and create exactly the kind of incident that damages trust quickly. We treat authentication as the security-critical concern it is - not as a feature to rush through so development can move on.

Security-First

Authentication treated as the security-critical layer it is

Honest Advice

If a library is the right call over a full IdP, you'll hear it

Standards-Based

OAuth2, OIDC and SAML implemented to spec - never rolled by hand

Senior-Led

Built by the founder, not delegated to juniors

Authentication is one place you cannot afford shortcuts - we recommend the approach that fits your actual requirements, not the most technically impressive option.

OJ
Owen Jones
Founder & Lead Engineer

Technologies We Use

OAuth2
OpenID Connect
JWT
ASP.NET Identity
C#
React Native
SQL Server
AWS Cognito
Azure AD B2C
Auth0

Don't see your stack? Get in touch.

Frequently Asked Questions

OAuth2 is an authorisation framework - it defines how applications can request access to resources on behalf of a user. OpenID Connect is an identity layer built on top of OAuth2 - it adds the concept of user identity, allowing applications to verify who a user is as well as what they are authorised to access. For most SSO implementations, OpenID Connect is the right standard because you need both authorisation and identity. We implement both correctly and explain the distinction clearly so you understand what you are getting.

Yes - extending SSO to applications that do not natively support modern identity standards is a common requirement. We build authentication bridges and proxy layers that allow legacy applications to participate in an SSO system without requiring a full rebuild. The approach depends on what access the legacy application allows and what authentication mechanisms it supports, which we assess during discovery.

Account recovery for MFA-enrolled users requires a secure process that does not create a backdoor that bypasses the MFA protection. We design account recovery flows that verify identity through alternative means - backup codes, administrator-assisted recovery, or identity verification - without compromising the security that MFA provides. The specific recovery flow is designed with your operational requirements and security standards in mind.

Yes - unified authentication across web and mobile is a standard requirement and one we implement regularly. The user logs in once and their session is recognised across your web application, mobile app, and any other connected platforms. Mobile authentication uses secure token storage appropriate for each platform - the iOS Keychain and Android Keystore - rather than less secure alternatives.

Related Services

API Integrations and Automation

Connecting your business systems
Third-Party Integrations

Connecting to external platforms
Mobile Applications

iOS and Android development

Ready to Unify Your Authentication?

Tell us about your applications and your authentication requirements. We will give you an honest view of the right approach and what it would take to implement it properly.

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