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Work Background
Coupa SoftwareSenior Lead SRE
Mar. 2025
Coupa SoftwareLead Site Reliability Engineer
Apr. 2016 - Feb. 2025Dublin, County Dublin, Ireland
Coupa SoftwareSenior Site Reliability Engineer
Mar. 2015 - Apr. 2016Dublin, Ireland- Infrastructure management
- Tools development and automation
Amazon Web ServicesTechnical Operations Support Engineer
Jan. 2014 - Mar. 2015Dublin, Ireland- Tier one support for essential Amazon services
- Event management for high severity events
- VIP creation, modification and troubleshooting (Citrix NetScaler load balancers)
- DNS records management
- XEN fleet troubleshooting
- Scripting and automation (Bash, Perl, Python, Javascript)
GTS PolandNetwork Architecture and Development Senior Engineer
Sep. 2012 - Dec. 2013Warsaw, PolandServices and solutions design and implementation for GTS CE group (telecoms in 5 countries: Czech Republic, Hungary, Poland, Romania, Slovakia)
GTS PolandSenior UNIX Expert
Jan. 2005 - Aug. 2012Warsaw, PolandProjects & responsibilities:
builder of FreeBSD-based HA appliances: firewalls, loadbalancers, SSL accelerators (pf, pfsync, carp, relayd, nginx, haproxy)
virtualization environments design and implementation (VMware vSphere, KVM, Xen)
maintenance of virtualization environments (total 29 hypervisors, ~2TB RAM, ~300 CPU, ~80TB HDD)
co-administration of ~700 servers
network-wide IP services design and maintenance (dns, w3cache, news, smtp, radius, RSA SecurID, ntp)
shared hosting platform design and maintenance (40000 mailboxes, 500.000 messages daily)
high profile customers consulting: services design and implementation
GTS Internet Partners S.A.UNIX Administrator
Nov. 2002 - Dec. 2004Warsaw, PolandProjects & responsibilities:
Multimo - automated mail and web hosting platform for DSL customers
network-wide IP services design (dns, w3cache, news, smtp, dhcp, radius, RSA SecurID, ntp)
hostmaster for 10.000+ domains site, reverse dns for multiple /16 networks (AS 6714), IP assignments
“matrix” - dispersed network delay/measurement on-line monitoring tool with graphed history
GNU/Linux-based ipchains shaper solution for radio access points with web tool for config autogeneration
ATOM S.A.WAN/UNIX Administrator
Jan. 1999 - Oct. 2002Warsaw, PolandProjects & responsibilities:
Coolnet - first polish free dialup and mail hosting solution (services: AAA, database, mail, webmail and web)
“blackbox” – cheap FreeBSD/ipfw based traffic filtering solution for leased lines customers protection
dhcp servers network for countrywide point-multipoint radio access points
hostmaster - .pl tld authoritative nameserver operation
nagios - host-side passive checks automatons, passive checks gatherer and processor
abuse team member responsible for contacts with law enforcement agencies
ATM S.A.System Engineer
Jul. 1996 - Dec. 1998Warsaw, PolandProjects & responsibilities:
participation in first polish internet exchange point creation
hostmaster - domain registrations, cooperation with registrars
field installations (POPs, leased lines)
servers administration (email, web, AAA)
WAN administration (leased lines, x25 pads, frame relay, dialup access points)
implementation of OSPF dynamic routing protocol within the network
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