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About the Role

We are building the next generation of our CPaaS platform, a robust ecosystem powering multi-channel communication services. Our platform supports global traffic across SMS, Email, Voice, WhatsApp, LINE, RCS, Passkey, and advanced Authentication services. We are looking for a highly skilled Backend Engineer to drive the scalability, reliability, and evolution of these services within a high-autonomy, fast-paced R&D environment.

Responsibilities

Design, implement, and optimize microservices powering multi-channel communication workloads.
Build and enhance backend capabilities supporting messaging, identity, verification, and communication APIs.
Develop high-throughput, low-latency services for global CPaaS traffic.
Design schemas, optimize queries, and ensure peak performance across databases.
Deploy and operate services on Kubernetes, ensuring resilience, scalability, and cost-efficiency.
Build clean, scalable REST APIs and contribute to API-first product architecture.
Manage version-controlled pipelines for build validation, automated testing, and safe deployments.
Utilize LLM-based tools (e.g., Claude, Codex) to improve code quality, automate documentation, and accelerate development workflows.
Ensure system visibility using Grafana, Prometheus, and structured logging.
Partner with Product Managers, QA, DevOps/SRE, and UI/UX teams to deliver high-quality features.
Uphold coding standards, conduct code reviews, and drive continuous improvement of engineering practices.

Requirements

5+ years of hands-on backend development experience.
Strong proficiency in Java or Golang.
Expertise with Postgres and MySQL.
Hands-on experience with Kubernetes and containerization.
Experience with CI/CD pipelines (GitHub Actions preferred).
Experience with Microservices and API-first system design.
Proficient in leveraging LLM-based tools for coding, automation, and workflow acceleration.
Advanced English proficiency (strong communication, documentation, and collaboration skills).
Domain experience with communication protocols (SMPP, SIP, REST APIs, WebRTC).
Experience across multiple CPaaS domains (SMS, Email, Voice, Passkey, Auth Services, WhatsApp, LINE, RCS, etc.).
Proven ability to work effectively in fast-moving, high-autonomy environments.

Skills

Java
Golang
Postgres
MySQL
Kubernetes
Containerization
CI/CD
GitHub Actions
Microservices
API-first system design
LLM-based tools
Claude
Codex
Grafana
Prometheus
Structured logging
SMPP
SIP
REST APIs
WebRTC
CPaaS
SMS
Email
Voice
Passkey
Auth Services
WhatsApp
LINE
RCS

Experience Level

5+ years of hands-on backend development experience

About the Company

We are building the next generation of our CPaaS platform, a robust ecosystem powering multi-channel communication services. Our platform supports global traffic across SMS, Email, Voice, WhatsApp, LINE, RCS, Passkey, and advanced Authentication services.