Senior Software Engineer
June 1997 to October 1999
Shareware Software Developer
January 1995 to May 1997
Founder, Principal Software Engineer
March 2003 to September 2013
Lead Software Developer
October 1999 to March 2003
What company does Jari Karppanen work for?
Jari Karppanen works for Amazon.com
What is Jari Karppanen's role at Amazon.com?
Jari Karppanen is Senior Software Engineer
What industry does Jari Karppanen work in?
Jari Karppanen works in the Computer Software industry.
Senior Software Engineer @ Amazon.com Working with Amazon Web Services (AWS). SeattleSoftware Engineer @ Past Jobs Various software projects (IIS-based web services, dial-up authentication server, server load monitoring service /w graphs, database designs, database utilities). From June 1997 to October 1999 (2 years 5 months) HelsinkiShareware Software Developer @ Self-employed Developed LevyKamu, a MS-DOS/Win95 hybrid shareware utility for managing files (think Norton Commander, PC Tools, but better). Fun facts: uses RSA for registration keys, can handle long file names under Win95 and OS/2, can format custom size floppies, does custom display modes and fonts, and uses flat protected memory mode. From January 1995 to May 1997 (2 years 5 months) KiteeFounder, Principal Software Engineer @ Brainero Architected an autonomous, distributed, real-time stock market monitoring/trading system capable of processing >100 billion events per day per node. Designed multiple low-level protocols, abstract object framework APIs and solved difficult problems related to concurrency. Implemented a NoSQL real-time database. Developed frameworks for low-latency parallel asynchronous I/O, crash-proof executables, live binary upgrades (100% availability instead of 99.999%), fragmentation-resistant memory management, and state-of-art ultra-low-latency user interface using DirectX. Crafted advanced algorithms and data structures optimized for multi-threading.Also did some client projects to fund development. For example, Seligson & Co fund management service (OmaSalkku) can now handle 20x more users, downtime was reduced to almost none, and new/redesigned backend components will allow the company to keep growing fast. From March 2003 to September 2013 (10 years 7 months) Lead Software Developer @ Endero Oyj The lead architect/developer in teams up to 20 persons. Participated in high-level customer meetings (with CEO and project managers), did project scheduling and timeframe estimations, did company-wide tech decisions as a member of the Core Tech Team, mentored senior developers and provided technical assistance to other teams. Architected and developed fault-tolerant and mission critical systems for banks, fund management companies and telecoms. Responsible for framework design and implementation for company-wide use. Acquired lots of experience on handling disasters due to to technical issues caused by the hiring boom of the IT bubble. From October 1999 to March 2003 (3 years 6 months) Helsinki
Introversion (I), Sensing (S), Thinking (T), Perceiving (P)
4 year(s), 8 month(s)
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