Worked on enhancing ETS named table lookups in the erlang/otp repository, focusing on reducing contention and improving throughput for read-mostly access patterns. The solution replaced striped read-write locks with lightweight atomic synchronization for non-writing lookups, leveraging concurrent programming and system programming expertise in C. This approach enabled lock-free lookups and integrated safe memory reclamation using thread_progress, ensuring robust concurrency. The optimization was validated through production observations, which showed reduced CPU time in lookup code paths, and was further supported by expanded test coverage targeting race conditions. The work demonstrated a strong focus on performance optimization and reliable, concurrent system design.