Senior Backend Engineer, Ruby

Sharesource

full-time

Posted on: 9/4/2025

Origin: • 🇻🇳 Vietnam

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Senior

AWSGraphQLGRPCKotlinKubernetesMySQLPostgresRedisRubyRuby on RailsSQLTerraform

About the role

Build and maintain backend services in Ruby on Rails, with some Kotlin work
Lead development of authentication, payments, and moderation features with security and reliability focus
Design schemas and queries for relational databases (Postgres/MySQL) and use caching where appropriate
Use Rails ecosystem tools such as Sidekiq and gRPC to build robust systems
Write clean, tested code and participate in thoughtful code reviews
Contribute to technical direction and help set conventions for the wider engineering group
Collaborate asynchronously across time zones in English, with a couple hours daily overlap for sync
Support occasional onsite activities such as team events, client meetings, and equipment handover

At least 5+ years’ professional experience in backend engineering
Strong background in Ruby on Rails
Willingness to pick up Kotlin when useful
Solid grasp of authentication, authorisation, and API security
Experience with payments or similar high-reliability systems
Comfortable with background job frameworks (Sidekiq/Resque)
Experience with caching (Redis/Memcached)
Skilled in relational database design and SQL optimisation (Postgres/MySQL)
Familiarity with monitoring and observability tools (Datadog, New Relic, OpenTelemetry)
Proactive and reliable with ownership of issues
Ability to collaborate across time zones in English, both written and spoken
Must be based locally in Vietnam (local residency required for compliance with Vietnam labor laws)
(Nice-to-have) Experience with GraphQL
(Nice-to-have) Familiarity with Kubernetes and AWS
(Nice-to-have) Infrastructure-as-code (Terraform or similar)
(Nice-to-have) Background in trust & safety, moderation, or fraud detection
(Nice-to-have) Performance tuning in large Rails applications