All code all the time: USENIX '05 has what you're looking for.

Below is a list of Training Sessions, Refereed Papers, Invited Talks, and Guru Is In sessions related to coding. Mix and match to create the coding-centric conference you need!

Training S2: Bridges, Routers, Switches, and Internetworking Protocols S4: Regular Expression Mastery S7: Advanced Shell Programming S9: Perl Program Repair Shop and Red Flags M4: Perl for System Administration: The Power and the Praxis M5: Inside the Linux Kernel (Updated for Version 2.6) T2: Solaris Kernel Performance, Observability, and Debugging (Day 1 of 2) T4: Advanced Perl Programming T8: Release Engineering and Project Lifecycle W2: Solaris Kernel Performance, Observability, and Debugging (Day 2 of 2) R1: Hacking & Securing Web-based Applications R3: Configuration Management with Cfengine

Refereed Paper Sessions W: Debugging W: Software Tools W: Emulation W: Improving Filesystems R: Short Papers II F: Speeding Up Things F: Large Systems F: Improving OS Components F: Measurement Invited Talks W: Computer Simulations of Thermal Convection and Magnetic Field Generation in Stars and Planets W: Online Gaming R: 10–20x Faster Software Builds F: Possible Futures for Software