This is iPECS Position
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. I 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.
We are now looking for a backend software developer to designing and developing Web service, AI & API. Your role will include all development activities such as: requirement analysis, system, architecture, software design, integration and product documentation. Our team mainly works on developing a UC (User Communication) system called iPECS-ONE and provides call, chat and collaboration service. We need back-end engineer with LLM, GenAI, and RAG development experience for AI Agent development.
What you will do:
- Design and implement scalable core backend components based on microservices architecture
- Develop GenAI chatbot services: implement real-time call summarization and AI assistant functions by integrating LLMs (OpenAI, Gemini, etc.) in a Node.js environment
- Build AI data pipelines: develop a RAG system and interactive data preprocessing using a vector database
- Develop and maintain high-performance web services and RESTful APIs
- Work with Node.js/Docker, perform open-source analysis & debugging, and manage Linux and DB environments (Back-end)
Requirements and Qualifications:
- 3+ years of experience related to SW development
- Education: Bachelor's Degree or above
- 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
- Preferred domain experience: Open API, various open source libraries and frameworks
- Web platform development experience using Node.js (Express, NestJS, etc.)
- Database: PostgreSQL, MySQL, Redis (Caching/Pub-Sub)
- Infrastructure: Docker, Kubernetes, AWS, CI/CD Pipeline
- Git configuration management experience
Interview process: 1 st Recruiter Screening Call - 2 nd Coding Test (Java, Python) - 3 rd Skill Interview - 4 th 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.
Primary country and city: Korea (the Republic of) (KR) || Seoul
Req ID: 781937
Top Skills
What the Team is Saying
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What We Do
Ericsson builds the digital connectivity the world relies on. Our technology underpins the mobile networks, platforms, and systems that billions of people, businesses, and societies depend on every day.
We are a global leader in communications technology, delivering mobile network infrastructure, cloud software, and wireless connectivity solutions for service providers and enterprises worldwide. Our networks support connectivity across 180+ countries, helping power everyday communication as well as critical digital services at global scale.
Connectivity has evolved far beyond consumer mobile use. Today, nearly 80% of the world’s population accesses the internet via mobile networks, and Ericsson is helping shape what comes next. We are advancing 5G and 5G Advanced, developing network APIs that open connectivity to the global developer ecosystem, and applying automation and AI to make networks more intelligent, efficient, and resilient.
Ericsson was the first company to launch live 5G networks on five continents, and our 5G platform is now commercially live in 150+ networks across 60+ countries. We also support more than 36,000 enterprise customers, enabling secure, high-performance connectivity for industries such as manufacturing, aviation, logistics, utilities, and public safety, where reliability and performance are mission critical.
Innovation is central to how we work. Ericsson has approximately 28,000 employees in research and development, backed by one of the strongest intellectual property portfolios in the industry with 60,000+ granted patents. Our engineers, researchers, and technologists work across 100+ global R&D sites, helping define how networks evolve and how digital infrastructure is built for the long term.
As the world moves toward a mobile-first, AI-powered, and cloud-driven future, connectivity becomes the foundation for digital transformation across every industry. Ericsson is building that foundation, shaping the future of digital connectivity through technology that operates at global scale and supports real-world impact, today and for what comes next.
Why Work With Us
Ericsson is a place for people who want to work on technology that powers everyday life. You’ll contribute to large-scale systems used every day, tackle complex challenges in live environments, and keep developing your skills and career in your own vision.
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