Mark Zealey
Chief Technology Officer at MoyaApp
United Kingdom
Summary
👤
Senior🎓
Top SchoolMark Zealey is a Chief Technology Officer and hands-on Linux full-stack engineer with 12 years of experience building high-performance platforms and teams that scale to millions of users. He leads MoyaApp’s technology direction as it grows past 2M DAU and adds banking features, while running a consultancy that has delivered large-scale systems for major cable providers and startups. Deep expertise in Linux, ClickHouse and DNS systems is reflected in work that scaled ClickHouse analytics to 20 billion rows/day on a single server and performance improvements contributed to the widely used PowerDNS project. Comfortable across DevOps, backend and webapp development, he combines low-level network and socket optimizations with pragmatic product delivery. He’s also interested in home automation and rapid cross-platform app development, showing a practical curiosity beyond core infrastructure. Based in the UK, Mark blends strategic technical leadership with continual hands-on engineering to turn complex distributed systems into reliable, scalable products.
12 years of coding experience
8 years of employment as a software developer
Sidney Sussex College, CambridgeMaster of Arts (MA), 2.i, Master of Arts (MA), 2.i at University of Cambridge
English, Turkish
Github Skills (13)
powerdns10
c-language10
dns10
cprogramming-language10
multithreading10
network-programming10
authority9
auth9
dns-resolver9
nameserver9
authorisation9
recursion8
recursive8
Programming languages (22)
Github contributions (5)
PowerDNS/pdns
Dec 2013 - Jul 2019
PowerDNS Authoritative, PowerDNS Recursor, dnsdist
Role in this project:
Back-end Developer
Back-end DeveloperContributions:42 commits, 7 PRs, 46 comments in 5 years 8 months
Contributions summary:Mark primarily focused on improving the PowerDNS backend, addressing issues related to socket binding, thread safety, and code organization. They introduced the ability to specify socket binding failure and implemented a fix for reload propagation across different threads. Furthermore, the user refactored the distributor code, and enhanced performance by optimizing the coprocess code, and implementing SO_REUSEPORT. These changes demonstrate a strong understanding of network programming and DNS server internals.
dnsdistpowerdns-recursordnssystems-programmingrecursor
moya-app/moya-public-api-examples
Feb 2022 - Oct 2024
Code examples for the Moya Business API. Owner: MZealey
Contributions:5 reviews, 3 PRs, 14 pushes in 2 years 8 months
apimoyabusiness-apirest-apiowner
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