Alexander Block
Backend Developer at codablock UG
Summary
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RockstarAlexander Block is a backend developer and DevOps-oriented engineer with 11 years of experience delivering robust, production-grade systems across cloud-native and cryptographic projects. He contributes to high-impact open-source repos—ranging from Kubernetes kOps, Cluster API AWS and Cilium to crypto stacks like BLS signatures, PIVX and Firo—bringing deep expertise in networking, distributed systems, and secure transaction logic. Comfortable across C++, Go and infrastructure automation, he frequently improves portability, build systems, and concurrency safety while adding tests and operational hardening. Alexander’s work on deterministic masternode lists, ChainLocks/LLMQ messaging, and IPAM race fixes shows a knack for tackling subtle correctness and performance issues that surface only at scale. As a freelancer he blends backend engineering with DevOps cadence, often touching both application logic and cloud configuration to ship end-to-end solutions.
11 years of coding experience
Github Skills (89)
crypto-wallet10
ebpf10
testing10
test-framework10
cmake10
microsoft-azure10
terraform10
digital-signature10
security10
cryptocurrency10
cilium10
infrastructure10
procedures10
database-management10
ansible-galaxy10
Programming languages (20)
Github contributions (5)
firoorg/firo
Feb 2018 - Dec 2019
The privacy-focused cryptocurrency
Role in this project:
Back-end Developer
Back-end DeveloperContributions:253 commits in 1 year 10 months
Contributions summary:Alexander contributed to the privacy-focused cryptocurrency project by implementing and modifying core backend functionalities related to special transactions (ProRegTx, ProUpServTx, ProUpRegTx, ProUpRevTx) and related database structures. They added and integrated the "immer" functional container library and introduced the implementation for deterministic masternode lists. Furthermore, they implemented new code for ChainLocks and introduced the handling of the required P2P messages (MNAUTH, QSIGSESANN) including related tests and optimizations, and incorporated LLMQ (Long Living Masternode Quorum) functionality.
zkpmerkle-tree-proof-of-workzero-knowledgeprivacy-focusedfocused
energicryptocurrency/gen2-energi
Sep 2017 - Jul 2018
Cryptocurrency for world adoption.
Role in this project:Back-end Developer
Back-end DeveloperContributions:178 commits in 9 months
Contributions summary:Alexander's contributions focused on fixing and improving the Energi cryptocurrency project's backend functionality. They addressed critical issues, such as a crash on exit related to wallet backups and parameter discrepancies in the ApproximateBestSubset function. The user also made improvements in data structures and removed segwit code, indicating a solid understanding of the project's codebase. Furthermore, they refactored RPC calls and added missing code from Bitcoin to enhance the project's functionality.
adoptioncryptocurrency
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