Senior / Leader Cloud Engineer

What makes this job special:
Salary & Bonus: Holiday, Lunar New Year, and year-end performance bonus tied to your contribution.
Environment: Modern open-plan office, and plenty of team-bonding activities.
Training: Free training and Japanese classes, certification support.
Job description:
Design, configure, and tune
Envoy
in production: L7 routing, filter chains, mTLS, rate limiting, observability.
Build security modules with
Proxy-Wasm
(Rust) or ext_authz/ext_proc; update configs dynamically via xDS with zero service disruption.
Integrate
OAuth2/OIDC
(token issuance/validation, SSO) and
PKI/mTLS
for secure access.
Run
Kubernetes
on-prem and in the cloud: deployment, scaling, networking, HA/DR.
Apply DevOps/GitOps:
CI/CD, Terraform-based IaC
, automated build-deploy-rollback.
Handle certificates/secrets, TLS/mTLS, and vulnerability scanning; troubleshoot Linux/network issues; monitor metrics/logs/traces; lead RCA/postmortems; meet SLA/SLO targets.
Align with the client-side team on solutions at the client-gateway boundary.
Implement agreed protocol trade-offs at the gateway: QUIC/HTTP-3, HTTP/2, TLS termination, internal CA.
Lead the area: assign tasks, review code, and mentor Cloud/Backend engineers.
Partner with Security, PM, and customers; write and maintain technical/design docs.
REQUIREMENTS
Knowledge & Experience:
Hold a Bachelor's degree in IT, electronics and telecommunications, or a related field.
Have at least
5 years
in
backend/infrastructure engineering
, including experience in a technical lead or senior role.
Have production
Envoy
experience (routing, filter chains, mTLS, observability), including extending Envoy via Wasm or ext_authz/ext_proc.
Demonstrate deep knowledge of
networking
(L4/L7, TLS/mTLS, PKI, DNS, and load balancing) strong Linux skills; and experience with distributed systems on
Kubernetes
(deployment, scaling, networking, HA).
Deliver zero-downtime config updates via xDS.
Show proficiency in at least
one backend language
(Go/Rust/C++/Java...), with strong code reading, modification, and debugging.
Fundamentals
(
concurrency
,
networking
) matter more than syntax.
Know OAuth2/OIDC and basic PKI (Keycloak/Vault/OpenBao).
Work with CI/CD and
Terraform/IaC.
Take strong ownership of production systems, with security and automation as first principles.
Propose alternatives with trade-offs when blocked technically, rather than stopping at "not feasible."
Understand the intent behind customer requests; communicate effectively and guide Dev/QA/PM.
Preferred:
Have experience with service mesh and DR.
Know Envoy Gateway / Gateway API.
Have experience with dynamic forward proxy.
Be familiar with Go and Rust (Wasm), with the ability to ramp up quickly.
Have experience implementing a full Zero-Trust architecture.
Have advanced GitOps experience, plus AWS / Azure .
Have in-depth knowledge of QUIC/HTTP-3 .
BENEFITS
12 annual leave days, along with public holidays in accordance with Vietnamese labor law.
Bonuses on special occasions such as the company anniversary and Lunar New Year.
Year-end bonus based on business performance and individual evaluation.
Participation in large-scale annual company events.
A variety of sports activities to promote health and team bonding.
Diverse internal clubs.
Modern open-plan working environment with fully equipped facilities.
Free training programs covering both professional and soft skills.
Opportunities to learn Japanese in person, from beginner to advanced levels, with a strong focus on speaking practice.
Free access to online courses on the Udemy platform.
Financial support for professional certification exams and rewards for earning advanced certifications.
Opportunities to grow into an internal trainer role with competitive compensation.