Senior Software Engineer Login Platform

Senior Software Engineer - Login Platform Location London Business Area Engineering and CTO Ref #

Description & Requirements

The Login Platform group covers all aspects of user authentication and experience across Terminal and Enterprise (non-Terminal) workflows. This includes teams that manage Bloombergs Single Sign-On (SSO) Multi-Factor Authentication user login experience and the sessions platform used to propagate authentication and authorization context throughout the Bloomberg ecosystem.
Sessions are the backbone of authorization decisions across Bloomberg. They are created from entry points including the Terminal Mobile Enterprise applications Web and more. These sessions need to include the correct entitlements customer data and security context so that application teams can make the accurate entitlement decisions.Whenever you access any data in Bloomberg the information that determines what you can do and what data you can access flows through our systems!
Were evolving our session and authorization infrastructure to support AI agents MCP-based integrations and machine-to-machine workflows across Bloomberg systems.
We are hiring Senior Software Engineers for two closely related teams in London focused on session infrastructure and session lifecycle management.

Where we sit:
Were part of Login Platform within the Platform Security organization operating deep in the infrastructure stack. Our teams own the framework that orchestrates sessions enrichment flows while data-owning teams provide and manage the underlying datasets.
Almost every business unit at Bloomberg depends on our platform to make authorization and access-control decisions. Our software is critical to maintaining Bloombergs reliability compliance and continued growth. Because of our position in the stack we enforce security not only for others but for ourselves as well.
What youll do:
As a Senior Software Engineer youll play a key role in shaping and scaling the infrastructure that powers session creation enrichment and authorization across Bloomberg.
You will:

- Design build and optimize low-latency multi-threaded backend systems that handle session and authorization data at scale.- Collaborate with multiple Engineering and Product teams to deliver a reliable and secure login experience.- Contribute to architectural decisions and long-term technical strategy for the Login Platform.- Improve tooling observability scalability and performance across critical infrastructure services .- Explore and champion new ideas to evolve our systems responsibly over time.

Engineers on the team are involved throughout the software lifecycle including design deployment observability incident response and long-term platform evolution.
Our technologies:
We work primarily in C and some Python running mostly on Linux with continued support for Solaris clients until full migration is complete.Because we sit deep in the infrastructure stack youll often need to balance innovation with compatibility designing modern robust solutions that coexist with legacy systems.
Youll need to have:
- Strong software engineering experience in C ideally building backend infrastructure platform or systems-level software.- Experience designing building or operating distributed backend systems ideally in high-availability low-latency or infrastructure-heavy environments.- Strong experience designing and building multi-threaded or concurrent applications.- Experience owning software across the full lifecycle including design implementation testing deployment observability incident response and long-term evolution.- Ability to make pragmatic system design decisions across performance scalability reliability maintainability and compatibility constraints.- An eagerness to understand a large non-trivial stack and propose incremental improvements without compromising reliability or security.- Strong communication and collaboration skills with the ability to work effectively across Engineering Product and platform-dependent teams.- A Degree in Computer Science Engineering Mathematics similar field of study or equivalent work experience.
Wed love to see:
- Background in authentication authorization identity access control entitlement systems SSO MFA session management or security-sensitive infrastructure.- Familiarity with systems that propagate authentication authorization entitlement or security context across distributed services.- A track record of building low-latency reliable backend or infrastructure services.- Hands-on involvement in improving observability scalability performance reliability or operational tooling for production systems- Exposure to platform teams that support multiple internal product or application teams.- Experience working across multiple business units or products with an understanding of their operational and integration challenges.


If indicated please note that years of experience are a guide; we will consider applications from all candidates who can demonstrate the skills necessary for the role. Discover what makes Bloomberg unique - watch our podcast series for an inside look at our culture values and the people behind our success.

Required Experience:

Senior IC

Employment Type : Full Time
Experience: years
Vacancy: 1