Design and implement scalable microservices-based backend systems for a UC platform, integrate LLM/GenAI (RAG) chatbots, build AI data and ELT pipelines with vector DBs, manage Kubernetes/Docker infrastructure and observability, and optimize systems for high-volume traffic.
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 will you do
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: 786308
#BI-Hybrid
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 will you do
- 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
- 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: 786308
#BI-Hybrid
Similar Jobs at Ericsson
Cloud • Information Technology • Internet of Things • Machine Learning • Software • Cybersecurity • Infrastructure as a Service (IaaS)
Provides advanced technical support for packet core products and customer deployments across multiple regions. Diagnoses complex mobile and core network issues, troubleshoots EPC/4G and 5G components and protocols, supports NFV and cloud-native environments, and participates in emergency fault isolation and restoration. Collaborates with product development teams to improve product quality, mentors junior engineers, and contributes to global support processes and customer satisfaction.
Top Skills:
5GCloud-Native DeploymentsContainersDiameterEpc/4GGtpIp ProtocolsIp RoutingKubernetesLinux/UnixNfvNgap/S1ApOrchestration ToolsPacket CorePfcpSctpSip
Cloud • Information Technology • Internet of Things • Machine Learning • Software • Cybersecurity • Infrastructure as a Service (IaaS)
Manage end-to-end supply chain execution, including order fulfillment, inbound and outbound logistics, warehouse operations, supplier performance, PSI planning, international logistics, inventory optimization, disruption resolution, KPI tracking, compliance, and dangerous goods management. Collaborate with sales, operations, suppliers, and other stakeholders to improve delivery performance, efficiency, and supply chain resilience.
Top Skills:
CloudErpSAPUcaas
Cloud • Information Technology • Internet of Things • Machine Learning • Software • Cybersecurity • Infrastructure as a Service (IaaS)
Develop 4G/5G packet core products, including SMF and GW-C, across requirements, architecture, design, integration, verification, and lifecycle support. Collaborate in cross-functional teams, maintain long-term product architecture, improve quality and processes, assess release readiness, support innovation, and build expertise in packet core and cloud-native technologies.
Top Skills:
3Gpp4G5GAi-Assisted Software Development ToolsCloud NetworkingContainersGw-CHTTPHttpsKubernetesPacket CoreSmfTcp/Ip
What you need to know about the Singapore Tech Scene
The digital revolution has driven a constant demand for tech professionals across industries like software development, data analytics and cybersecurity. In Singapore, one of the largest cities in Southeast Asia, the demand for tech talent is so high that the government continues to invest millions into programs designed to develop a talent pipeline directly from universities while also scaling efforts in pre-employment training and mid-career upskilling to expand and elevate its workforce.
