Stefan Bratanov
Senior Blockchain Protocol Engineer at ConsenSys
London, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolStefan Bratanov is a Senior Blockchain Protocol Engineer based in London with 10 years of professional software experience, currently working on Teku at ConsenSys as part of the Eth2 protocol team. He specializes in building clean, testable Java back-end systems and has contributed notable features to Teku, including adding Gnosis network support and precise validator timing adjustments. Prior to blockchain, he spent several years at RBC Capital Markets delivering Java microservices, CI/CD pipelines, and cloud-based regulatory reporting solutions on Google Cloud. Stefan combines production-grade engineering discipline—TDD, observability, Kubernetes—with hands-on protocol work, bridging financial systems rigor and decentralized consensus development. He’s comfortable across JVM and scripting ecosystems (Java, Python, R) and has practical experience with large open-source client codebases used by the Ethereum community. A detail-oriented problem solver, he often focuses on correctness and maintainability in distributed, latency-sensitive systems.
10 years of coding experience
6 years of employment as a software developer
Bachelor of Science (BSc), Computer Science, Bachelor of Science (BSc), Computer Science at Kings College London
English, Bulgarian
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (5)
javas10
ethereum10
blockchain10
java10
networking8
Programming languages (14)
Github contributions (5)
Consensys/teku
Apr 2022 - Jan 2023
Open-source Ethereum consensus client written in Java
Role in this project:
Back-end Developer
Back-end DeveloperContributions:4 releases, 643 reviews, 232 commits in 9 months
Contributions summary:Stefan's contributions primarily focused on adding and configuring support for the Gnosis beacon chain to the Teku project. This involved modifying core Java files related to network configuration and presets. The changes include adding the Gnosis network, the appropriate bootnodes, and setting up initial configurations. Furthermore, the user's commits demonstrate a focus on validator client slot intervals by using milliseconds in calculations.
artemisconsensysethereumbeacon-chainblockchain
StefanBratanov/jc-kzg-4844
Nov 2022 - Aug 2024
Java wrapper around C-KZG-4844
Contributions:2 PRs, 102 pushes, 53 branches in 1 year 9 months
javajava-wrapperkzg
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