Alexander Meißner
Freelance Software Engineer at Anza Technology, Inc.
Summary
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RockstarAlexander Meißner is a freelance software engineer with 13 years of experience specializing in low-level, back-end systems and performance-sensitive code. He contributes to high-profile open-source projects such as Solana and MoltenVK, focusing on memory management, eBPF/JIT execution, syscall handling, and multi-planar image support. His work demonstrates a strong aptitude for debugging complex VM/address-translation issues, refactoring for maintainability, and optimizing instruction-level performance. Based in Germany, he combines deep systems programming expertise with pragmatic engineering practices to deliver secure, scalable runtime components for blockchain and graphics platforms. An understated strength is his ability to bridge low-level correctness with practical optimizations that improve real-world deployments.
13 years of coding experience
Stackoverflow
816reputation
55kreached
17answers
13questions
Github Skills (32)
vulkan10
c-language10
ebpf10
memory-management10
graphics-engine10
metal10
solana10
compile10
blockchain10
blazor-webassembly10
rust10
webassembly10
cprogramming-language10
jit10
system-programming9
Programming languages (16)
Github contributions (5)
solana-labs/rbpf
Sep 2020 - Dec 2022
Rust virtual machine and JIT compiler for eBPF programs
Role in this project:
Back-end Developer
Back-end DeveloperContributions:45 releases, 201 reviews, 221 commits in 2 years 3 months
Contributions summary:Alexander was primarily involved in debugging and fixing address translation issues within the Rust virtual machine (VM) and JIT compiler for eBPF programs. Their contributions included identifying and resolving bugs related to LD_ABS and LD_IND instructions, optimizing memory region address translation using binary search, and implementing more robust and accurate instruction meter checks. The user also worked on improvements to the JIT including syscall, stack, and branch related optimizations.
jitrustebpf-programsebpfvirtual-machine
solana-labs/solana
Oct 2020 - Jan 2023
Web-Scale Blockchain for fast, secure, scalable, decentralized apps and marketplaces.
Role in this project:Back-end Developer
Back-end DeveloperContributions:701 reviews, 212 commits, 593 PRs in 2 years 3 months
Contributions summary:Alexander contributed to the core functionality and underlying architecture of the Solana blockchain project, with commits related to low-level system programming, and BPF program execution and compilation. They implemented functionality for interacting with the runtime and made code changes, including refactoring existing code. The user also worked on adding and modifying syscalls used within the BPF programs that run on the Solana blockchain. The code indicates focus on memory management and security aspects of the project.
securescalablesolanamarketplacesdapp
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