ONKYEOL Co., Ltd. is a specialized company that develops the ‘AI Operations OS’ platform that allows AI to generate, operate, and evolve corporate work systems autonomously. ONKYEOL defines AI not merely as a functional ‘model’ introduction but as the establishment of a manageable and sustainable ‘operational environment’ at an enterprise level, supporting the assetization of AI within companies.
From AX (AI transformation) consulting to cloud infrastructure construction, ONKYEOL demonstrates visible results such as cost reduction and efficiency improvement through its own platform, ONYOAI. Currently, we are collaborating with major financial institutions and large corporations to create new standards for AI automation.
Service Introduction: ONYOAI
ONYOAI is an enterprise AI platform SaaS that combines ontology-based knowledge structuring with AI agent automation.
Targeting domains with complex and strict regulations such as HR, law, and public administration, it systematizes corporate domain knowledge into a 3-Axis ontology structure to immediately implement complex business processes into AI workflows in a no-code environment. With the official launch of version 1.0 in 2026, it has rapidly scaled up, being recognized for both its technological capabilities and marketability by being selected for several national support projects.
- Development of ONYOAI core platform and AX engine: Design and development of backend architecture for AI platforms that structure and automate complex enterprise domain knowledge
- Enhancement of AI/LLM and RAG system: Integration of Multi-LLM inference engine, Weaviate-based RAG hybrid search, construction of asynchronous workflow engine and AI agent pipeline
- Implementation of enterprise SaaS architecture: Infrastructure optimization for multi-tenancy data isolation environments that meet the stringent security requirements of enterprises and public institutions, as well as handling large-scale traffic
- External integration and adapter design: Designing reliable integration structures with various external systems and government APIs, such as finance, public services, ERP, etc.
- Must have at least 5 years of backend development experience.
- Experience in development using Node.js + NestJS or equivalent frameworks.
- Proficient in TypeScript with the ability to write high-quality code.
- Experience in utilizing RDBMS (PostgreSQL) and optimization of queries in complex large-scale data environments.
- Skilled in REST API design and documentation via OpenAPI/Swagger.
- Rich experience in AWS environment operations (must have operated multiple of Lambda, ECS, RDS, S3, SQS).
- Experience in building, deploying, and operating Docker container-based applications.
- Extensive experience in implementing adapter patterns for various external infrastructure integrations.
- Experience in implementing multi-tenancy systems for ERP and SaaS products (data isolation between tenants, functional/resource control by plan).
- Experience in designing asynchronous workflows through operating message queues (SQS, Kafka, RabbitMQ, etc.).
- Experience in design and operation of NoSQL (especially DynamoDB) Single Table Design.
- Experience in building AI/LLM backend systems involving RAG, workflow engines, AI agents, MCP (Model Context Protocol), etc.
- Experience in building and operating Vector DBs (Weaviate, Pinecone, Qdrant, etc.).
- Experience in implementing security, audit, compliance systems such as generating audit logs, PII masking, and anomaly detection.
- Experience in government API integration and linkage development for HomeTax, Government 24, social insurance, national laws, etc.
Benefits and Work Environment
- Training/Living: New employee training (OJT), certification acquisition support
- Refresh: Annual leave, half-day leave, summer vacation, Workers' Day off, public holiday off, condolence leave system
- Subsidies/Insurance: Health check-ups
- Salary System: Holiday (overtime) allowance, four major insurances
- Organizational Culture: No mandatory company dinners, no mandatory overtime
- Gifts: Holiday gifts/return home expenses
- Commuting: Flexible working hours system
Document screening (submission of resume and portfolio/GitHub link) → Technical Interview → Negotiation of treatment and final acceptance
