Backend Developer

About the Position

We are looking for a Backend Developer to join our team at Ericsson in Seoul, Korea. Design and develop scalable backend systems using microservices, Kubernetes, and AI technologies.

About this Opportunity

IPECS enables innovative and continuous R&D experience using the latest technologies, and experiences domestic and international communication solutions through various products and solutions. We hope you will pay a lot of attention to talented people who have the challenge, passion, and creativity to grow from IPECS to a global leader.

Responsibilities

• Design and implement scalable core backend components based on a microservices architecture
• Kubernetes-based service operations and API Gateway/MSA design (including Helm, ArgoCD, and GitOps practices)
• Developing AI/LLM backend integration and scalable system design (including MCP or similar interfaces)
• Building ELT pipelines and observability systems (logging & monitoring)
• AI data pipeline construction: Developing a RAG system and interactive data preprocessing using a vector database
• Language: JavaScript, TypeScript, Node.js, Python
• Node.js/Docker, open source analysis & debugging, Linux, DB (Back-end)
• GenAI capabilities: Experience building RAG (Retrieval-Augmented Generation)-based chatbots that go beyond simple responses using LangChain.js and other tools
• Chatbot Scenario Design: Experience planning and developing hybrid services that combine rule-based and LLM-based chatbots
• High-Volume Traffic Handling: Experience optimizing database queries and distributed processing in enterprise-level, large-scale user environments

Requirements

• Core Skills: JavaScript, TypeScript, Node.js, Python, Kubernetes, Docker, Linux, PostgreSQL, MySQL, Redis, RAG, LangChain.js, Chatbot Scenario Design, High-Volume Traffic Handling
• Secondary Skills: GenAI, AI data pipeline construction, Open API, CI/CD Pipeline, Git

We Offer

• Join a team of diverse innovators at Ericsson
• Opportunity to push the boundaries of what’s possible
• Collaborative environment with a focus on diversity and inclusion

About the Company

At Ericsson, you’ll have an outstanding opportunity. The chance to use your skills and imagination to build solutions never seen before to some of the world’s toughest problems. You’ll be challenged, but you won’t be alone. You’ll be joining a team of diverse innovators, all driven to go beyond the status quo to craft what comes next.

Application Process

Interview process: 1st Recruiter Screening Call – 2nd Coding Test (Java, Python) – 3rd Skill Interview – 4th Leadership Interview

Why join Ericsson? At Ericsson, you’ll have an outstanding opportunity. The chance to use your skills and imagination to push the boundaries of what’s possible. To build solutions never seen before to some of the world’s toughest problems. You’ll be challenged, but you won’t be alone. You’ll be joining a team of diverse innovators, all driven to go beyond the status quo to craft what comes next.

What happens once you apply? Click Here to find all you need to know about what our typical hiring process looks like.

Encouraging a diverse and inclusive organization is core to our values at Ericsson, that's why we champion it in everything we do. We truly believe that by collaborating with people with different experiences we drive innovation, which is essential for our future growth. We encourage people from all backgrounds to apply and realize their full potential as part of our Ericsson team. Ericsson is proud to be an Equal Opportunity Employer. Learn more.