John Cairns Email & Phone Number

Naperville, Il, Us

Building at Anagram

Singapore, Sg

Developed and maintained Solidity ERC-20 token contracts, including ETHx, this involved implementations of pools, swaps, and multi-chain interoperability with LayerZero

The Web, Us

Web3 platform engineering for a secure, open, and decentralized communication protocol that connects creators, communities, apps, and users.• Contributed significant improvements to did:ethr, EIP-1056, Ethereum • Developed XMTP conversation protocol contract for Ethereum• Engineering leadership and mentorship for decentralization team

• Developed NFT Governance Smart Contract for Ethereum• Lead on NFT ingestion system to aggregate all NFT sales and data from Solana

New York, Ny, Us

Crypto Trading System Software Engineer in C++• Lead the engineering team building a crypto derivatives product• Developed market data service for publication of WebSocket JSON and FIX SBE binary market data

Digital asset trading system developer in a new startup trading Bitcoin, Ethereum and other currencies. • Protocols for instruments, trades, orders, analytics and theos • Digital asset market data real time publication • Smart order router for top crypto asset exchanges • Worked extensively with crypto market data and exchange protocols

Chicago, Il, Us

Trading systems software developer in C++, Java, Ruby and Python

Chicago, Illinois, Us

Engineering leader and mentor for fast paced media startup• Developed ultra high performance single threaded HTTP server using Reactor/Acceptor pattern in a 1.4M request/s enterprise ad server• Developed application server using Event Sourcing. The server consists of a series of Disruptor stages that cascade events across multiple threads• Developed high performance event bus with serialized multicast event distribution• Developed the worlds highest performing Java BlockingQueue capable of 20ns intrathread transfers• Mentored the engineering organization with high performance coding techniques including garbage free, lock free, elegant use of data structures and design patterns• Lead core technology team with focus on development of Conversant's next generation ad serving platform• Lead a very popular technical seminar to promote engagement and continuing education

New York, Ny, Us

Core Java, TCP sockets, multicast events, high performance trading platform development in Linux• Implemented a single threaded event sequencer capable of processing 50,000 requests per second on a single host• Implemented a multicast based buffered event publisher• Implemented a memory mapped byte store• Implemented a TCP Proxy for command processing and passing messages on an event bus• Implemented numerous high performance data structures including ring buffers, queues, byte buffers, bit sets and file stores

Chicago, Il, Us

Core Java, TCP sockets, threading and concurrency - HTTP server development in Linux• Implemented a custom web server capable of gracefully serving 18 billion requests a day, server load in data centers was reduced by an order of magnitude• Optimized datalog query engine to realize a two order of magnitude performance improvement in execution time• Implemented a high performance thread scheduler based on a custom lock free queue implementation that greatly exceeds the performance of existing alternatives• Provided overall system optimizations and improvements resulting in a 25% reduction in process time• Tuned garbage collection settings to reduce overall system load by a factor of 10• Lead a team of four (4) Java experts in one of the most business and performance critical teams at Dotomi

Zurich, Ch

Core Java, TCP sockets, multicast events, trading platform server development in LinuxSenior developer in UBS' Client Facing Technologies one of the highest volume trading platforms in the World• Built an aggregation server to index and aggregate market and client order information supporting order flow of hundreds of millions of orders daily• Built a history server to calculate relative averages over time for aggregate market data, consuming up to 5 days of order details at a time• Refactored order hierarchy indexer to consume a fixed amount of memory for arbitrarily large order volumes. This allows UBS to control memory footprint and server cost as order volumes continue to increase.• Refactored order execution indexer to support extremely large order volumes. Previously the service had been limited to only 150M orders, however UBS projections exceed that number. • Responsible for ongoing development and maintenance for nine of UBS' key order indexing, search and management applications

Core Java J2SE, Sybase, SQL, Ant, Apache, Ruby, Perl and Java server development in LinuxDevelopment lead and technical mentor for subscribermail.com one of the fastest growing companies in Illinois• Designed and developed the Enterprise Java Daemon (EJD) project a high performance, high availability, UNIX based server platform providing superior performance to existing platforms. This is a Java NIO based high performance application server responsible for handling 100’s of thousands of user requests per hour. Stability and performance far exceeded SubscriberMail’s existing ColdFusion infrastructure.• Designed webserver system “SubscriberMail Click,” based on EJD technology. Click is a capable Java based web server directly targeting SubscriberMail’s rigorous performance and transaction processing demands.• Developed SOAP based webservice architecture in SubscriberMail's SME/EJD platform with Apache Axis• Lead group of 12 developers and administrators in ongoing development and support of subscribermail.com• Executed release process, development staging, testing, planning and requirements with genuine agility. These organizational changes greatly improved productivity in the organization.

Columbus, Ohio, Us

Graduate study, teaching, research, C++ development of particle physics simulations• Master of Science: “The Propagation of Cosmic-Rays through Cosmological Media”• Developed Monte Carlo simulation of ultra high energy particle interactions• Publications: [arXiv:astro-ph/0705.1989v1], [arXiv:astro-ph/0705.2760]

Java and C++ server development in Windows 2000, IIS, and Apache TomcatLead developer and principal software designer for a raster mapping system with thousands of monthly subscribers and over 8Tb of data.Substantially redesigned and improved Java based “LandViewer” application• Redesigned “HRCDaemon” a C++ raster map delivery system used on this site, including many performance improvements leading to real time mapping capabilities• Designed E-Commerce system for processing credit card payments using Java Servlet technology• System won “Innovation Quotient for Technology” an annual prize from the Northern Colorado Business Journal

Chicago, Illinois, Us

ANSI C++ TCP/IP server development in Linux 2.x, Solaris 2.6, and HP/UX 11Designed and developed randmcnally.com's online mapping system. This system provides high quality maps to consumers through a web interface. Randmcnally.com is a popular travel site with millions of map draws each month. • Pioneered the use of advanced image rasterization technology for real-time online mapping systems: true-color, transparency, texture mapping and anti-aliasing techniques• Developed software libraries for image rasterization and map display • Exceeded requirements: The resulting system is capable of generating typical maps in 300-900 milliseconds on Intel Pentium III class hardware• Developed client/server API for this mapping system

Denver, Co, Us

C++ server development in Linux 2.x, Solaris 2.5, 2.6, 2.7, Windows NT, and IRIX 6.xSenior developer on MapQuest's original mapping and routing team. I was responsible for development and design of systems and infrastructure, while providing technical advice and debugging skills.• Added parser optimizations in Connect (Online Maps) and TripConnectPlus (Online Routing) resulting in an overall 15-25% reduction in user time• Retrofit international routing support to MapQuest’s legacy routing infrastructure, this allowed online routing outside the US and significantly expanded MapQuest’s worldwide business opportunities• Designed and built a TCP/IP gateway that multiplexes mapping and routing requests across multiple servers for system scalability against arbitrary demand

Windows NT, Solaris 2.x, IRIX 6.x, HP/UX 9 - 11, AIX 3 - 4, Digital UNIX v4.0, some MVS (zOS, OS/390), ANSI C, ANSI C++, and Java developmentLead developer and technical resource for four of QMSoft's core geocoding products: AddressBroker, Presort, Centrus Desktop, and the NHDB Enhancer. These are libraries and applications supporting large-scale mapping and marketing data augmentation tasks in client/server and Internet environments.• Spearheaded port of QMSoft’s core products to MVS-OS/390 resulting in QMSoft’s single largest and most profitable software contract with a world leading insurance company• Won award, "Quarterly Excellence Award", April 1999• Designed and coded CIO extensions to AddressBroker: these modules support Internet deployment including HTTP and HTTPS compatibility• Provided stability improvements and feature modifications for the AddressBroker address matching system• Developed the NHDB Enhancer application: a merge/purge record matcher for national household data• Porting contributions include 64bit native port of QMSoft's core libraries to Digital UNIX v4.0, ANSI C++ compliance and port to HP/UX 10.20 and 11.0

Ms, Physics

Bs, Physics