Backend Development Engineer CPaaS Business Department (RS Product Delivery & Innovation Div)

Job Description:

About Organization

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.

Job Duties

• Backend Service Development:Design implement and optimize microservices powering multi-channel communication workloads.

• Feature Engineering:Build and enhance backend capabilities supporting messaging identity verification and communication APIs.

• Distributed Systems Engineering:Develop high-throughput low-latency services for global CPaaS traffic.

• Database Engineering:Design schemas optimize queries and ensure peak performance across databases.

• Cloud-Native Architecture:Deploy and operate services on Kubernetes ensuring resilience scalability and cost-efficiency.

• API-First Engineering:Build clean scalable REST APIs and contribute to API-first product architecture.

• CI/CD & GitOps:Manage version-controlled pipelines for build validation automated testing and safe deployments.

• AI-Enhanced Development:Utilize LLM-based tools (e.g. Claude Codex) to improve code quality automate documentation and accelerate development workflows.

• Observability:Ensure system visibility using Grafana Prometheus and structured logging.

• Cross-Functional Collaboration:Partner with Product Managers QA DevOps/SRE and UI/UX teams to deliver high-quality features.

• Engineering Excellence:Uphold coding standards conduct code reviews and drive continuous improvement of engineering practices.

Minimum Qualifications

• 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.

• AI-Assisted Development: Proficient in leveraging LLM-based tools for coding automation and workflow acceleration.

• Advanced English proficiency (strong communication documentation and collaboration skills).

Preferred Qualifications

• 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.

Key Interfaces

• Backend Engineering Team

• QA & Automation Teams

• DevOps / SRE

• Product Managers

• UI/UX Designers

• Project Managers

• R&D Leadership / CTO

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