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Hi, I am Marijus

Marijus Kasperavicius

Reliability Engineer

I am an engineer. I turn metrics into actions. Reliability for me includes security as well. And I know what does it mean to run service with 99.999 availability. Have to admit I do dopamine-driven development: if there is a problem, I can’t stop solving it. Creating elegant, expandable and efficient systems inspires me.

Reliability
Security
Leadership

Skills

Experiences

1
SIX Digital Exchange

Apr 2019 - Oct 2025

Zürich, Switzerland

The World’s Leading Financial Market Infrastructure for Digital Assets

Head of SRE

Oct 2022 - Oct 2025

Responsibilities:
  • Directed a team of six engineers, providing technical guidance and delivering scalable SRE products
  • Managed 20+ enterprise-grade systems distributed across 10 Kubernetes (OpenShift and AKS) clusters
  • Developed a vulnerability monitoring process to resolve 80% of high-level image vulnerabilities on time
  • Led the implementation of HSM-hardened certificate issuance automation for more than 100 certificates per month
  • Optimized backup architecture, cutting time from 2.5 hours to 15 minutes by storing only essential data
  • Reduced Azure costs by 30% in a year through advanced analysis tools and disciplined cost reviews
  • Created Grafana and Elastic dashboards to reach CI/CD reliability above 95%
  • Grounded the collaboration of four teams in facts to deliver a confidential-computing solution with Fireblocks, Intel SGX, HP, Securosys and Red Hat.
  • Successfully coordinated a team to mitigate database cluster issues, severe security attacks and other critical incidents
  • Implemented incident tickets augmentation using RAG and Azure AI services
Tech Lead

Apr 2019 - Oct 2022

Responsibilities:
  • Architected FINMA licensed production CSD deployment using ArgoCD GitOps
  • Assured system meets compliance requirements to get license from regulator
  • Assembled a demo for the Board of Directors to ensure the project’s continuity

Nasdaq

Sep 2016 - Apr 2019

Vilnius, Lithuania

Global technology company serving the capital markets and other industries.

Principal Architect

Jul 2018 - Apr 2019

Responsibilities:
  • Delivered a production-grade eVoting system processing 50 TPS on a ledger with Thales HSM, deployed on AWS with Kubernetes
Lead Architect

Sep 2016 - Jul 2018

Responsibilities:
  • Led 5 engineers to a successful DvP on ledger PoC for SIX, driving scope through behavior-driven development
  • Delivered a Proof of Concept for USD tokenization in collaboration with CitiBank
2

3
Telia

Nov 2001 - Aug 2016

Vilnius, Lithuania

Leading telecommunications company in the Nordic region.

Product Development Manager

Jul 2010 - Aug 2016

Responsibilities:
  • Established governance for application development and ran projects using agile methodologies (Scrum, Kanban).
  • Automated tests using SIPp and Cucumber; assured maintainability with Ansible.
  • Developed a highly reusable SIP-SLEE application framework
  • Developed a provisioning system using Apache ServiceMix
  • Introduced ElasticSearch APM for observability
Value Added Services Architect

Feb 2009 - Jul 2010

Responsibilities:
  • Developed Messaging and IN services.
  • Upgraded OSS system (NetAct).
Project Manager

Jan 2005 - Feb 2009

Responsibilities:
  • Managed technical projects for Inventory, Fault and Performance management
Senior System Administrator

Jan 2003 - Jan 2005

Responsibilities:
  • Administered Java system that I have developed
Software Engineer

Nov 2001 - Jan 2003

Responsibilities:
  • Developed a self-care portal on IBM WebSphere.
  • Exposed API for third parties to top up Prepaid services.
  • Developed Webmail for operator customers.

Eltera

Nov 2000 - Nov 2001

Vilnius, Lithuania

Automation enineering company

Software Engineer

Nov 2000 - Nov 2001

Responsibilities:
  • Developed microcontroller for security systems
  • Administered IT infrastructure
4

Education

Master's degree in Computer Science
Bachelor's degree in Computer Science

Projects

Pharos
Pharos
Architect, Developer June 2025 - Present

Automate the security scanning, vulnerability management and compliance reporting.

Image handler
Image handler
Architect, Developer July 2025 - September 2025

Seamless DORA reporting with minimal configuration

Vilnius carpool
Vilnius carpool
Architect, Developer Nov 2015 - Jun 2016

Ride sharing platform for Vilnius residents - part of Code of Vilnius initiative

Accomplishments

Speexx B2.2 certificate
Speexx Feb 2024 - Sept 2024

German language course

German Language B1 fide certificate
Fide Mar 2024

German language skill assesment