Tuomas Silen
Security Engineer at Smartly.io
Helsinki, Finland
Summary
👤
SeniorTuomas Silen is a security engineer with 14 years of hands-on experience building and operating secure, highly available cloud-native platforms for SaaS at scale. Based in Helsinki, he led Smartly.io’s security program and ISMS work to achieve ISO27001 certification while continuing to design and run global networking, Kubernetes clusters, and cost-efficient image delivery across 1000+ servers. His background as a Flowdock founder and longtime DevOps engineer gives him deep expertise in Linux, Terraform/Ansible, containerization, and observability, combined with practical software skills in Ruby, Node and databases. He contributes to critical open-source tooling—improving Vault’s etcd locking and leader stability—reflecting a focus on reliability and subtle concurrency issues rarely visible in production. Colleagues rely on him to translate compliance requirements into automated, auditable infrastructure and resilient operational practices.
14 years of coding experience
7 years of employment as a software developer
English, Finnish
Stackoverflow
26reputation
1kreached
2answers
0questions
Github Skills (12)
go10
etcd10
concurrency10
secrets9
vault9
error-handling9
permission6
websocket6
load-testing6
unicorn6
ruby6
ruby-on-rails6
Programming languages (7)
Github contributions (5)
hashicorp/vault
Sep 2015 - Sep 2015
A tool for secrets management, encryption as a service, and privileged access management
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 commits, 1 PR, 3 comments in 6 days
Contributions summary:Tuomas focused on enhancing the `etcd` lock implementation within the Vault project. They implemented key renewal logic, ensuring leader election stability by preventing semaphore key expiration. The user also refactored the code, using `defer` statements for channel closure and adopting named return values for improved readability. Their contributions primarily involved managing and maintaining the internal workings of the locking mechanism.
access-managementencryptionvaultgosecrets
flowdock/oulu
Mar 2012 - May 2015
Flowdock IRC Gateway
Contributions:117 commits, 4 PRs, 3 pushes in 3 years 2 months
flowdockirc
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