Sebastián Tello
Senior Developer at Atlassian
Antequera, Andalusia, Spain
Summary
👤
Senior🎓
Top SchoolSebastián Tello is a senior developer with 14+ years building resilient, secure distributed systems and developer platforms, currently driving platform and service-mesh initiatives at Atlassian. He blends deep expertise across languages (TypeScript, Go, Java, Python, Ruby) and cloud/Kubernetes infrastructure with a background in penetration testing and automated exploitation, enabling pragmatic security-first design. Sebastián is an advocate of clean code and TDD, mentoring teams through pair-programming and internal workshops to improve developer experience and delivery quality. He’s the author/co-author of several widely used contract-testing tools (including json-schema-diff, linked to two patents) and played a key role rolling out ingress/egress proxies across thousands of microservices with zero incidents. Based in Antequera, Spain, he combines hands-on engineering with tooling and platform thinking, often surfacing cross-team improvements that aren’t obvious from code alone.
14 years of coding experience
7 years of employment as a software developer
BULATS CEF/ALTE level C2/5 (Very Advanced), English, BULATS CEF/ALTE level C2/5 (Very Advanced), English at University of CambridgeInformation Systems Engineer, Information Systems Engineer at Universidad Tecnológica Nacional
English, Spanish
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (145)
consumer-driven-contracts10
http-api10
testing10
test-framework10
proxy10
infrastructure10
dredd10
integration-testing10
language-agnostic10
validation10
interception10
api10
boto10
api-blueprint10
sjs-team10
Programming languages (12)
Github contributions (5)
cele-carrillo/om_shankara
Jul 2015 - Mar 2020
static website hosting
Contributions:30 commits, 33 pushes, 2 branches in 4 years 9 months
hostingwebsite-hosting
cele-carrillo/one-tune-today
Apr 2020 - May 2022
Contributions:1 PR, 24 pushes, 1 branch in 2 years 1 month
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