As a Senior Backend Engineer you will:
Migrate hundreds of millions of legacy users to the new identity system automatically claiming existing usernames while safely handling validation errors and edge cases.
Implement fallback logic for users without a set username ensuring every account has a unique and valid identifier.
Provide immutable unrecognizable URL identifiers that are safe for public-facing profiles.
Integrate username and identifier generation into the account lifecycle so that every new account automatically receives a unique username and corresponding URL identifier.
Work with data pipelines and large-scale processing systems to ensure reliable high-performance migration and synchronization of identity data.
Collaborate with engineers product managers and cross-functional teams to ensure seamless integration scalability and system safety.
Qualifications :
Adept at writing clean maintainable and testable code with a strong focus on system reliability and performance.
Experienced in designing for scalability resilience and observability with hands-on experience managing large volumes of data.
Able to lead technical design discussions influence architecture and collaborate effectively across multiple teams and domains.
Comfortable taking end-to-end ownership of complex projects from design and implementation to production and maintenance.
Pragmatic and outcome-oriented balancing technical quality delivery speed and user impact.
Passionate about user identity data integrity and building robust backend systems that support safe and social user experiences.
Additional Information :
Start date: ASAP
Mode of Work: Flexible
Location: Stockholm
Form of employment: Full-time until further notice we apply 6 months probationary employment.
We interview candidates on an ongoing basis do not wait to submit your application.
Remote Work :
No
Employment Type :
Full-time
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