Company

Twenty years of field experience, turned into services and AI agents

ReturnAll is a software company built on two decades of designing large-scale systems for finance, telecom, manufacturing and the public sector. We operate public information services and develop AI agents that work alongside people.

Background

Areas the founder has designed and built hands-on over 20 years.

Platforms · Devices

Mobile platform system apps (launcher, lock screen, SNS, email)
Smart home server, video calling, device control, smart TV billing
High-performance Netty servers and tuning; recommendation and search engines
Unified billing (domestic and global PG integration), open API platform

Finance · Enterprise

Bank SWIFT integration; auto insurance and lease/rental systems
Electronic payments, center-cut batch, MCI/EAI integration
Transport and dispatch design; sales portal

Architecture · Standards

Online and batch frameworks; multiple development-standard frameworks
Integration standards; shared EAI components
MSA migration (gateway, auth, service discovery, config) for 13 services
Korean eGovernment Framework standardization and technical support

Quality · Performance · Security

JMeter performance testing and bottleneck fixes; unit test setup
SonarQube static analysis; APM monitoring (Jennifer, Scouter, CloudWatch)
LDAP, SSO, PKI and e-signature improvements; DTLS session redundancy
IoT protocols (LwM2M, oneM2M, CoAP); message queue tuning

Cloud · DevOps

AWS infrastructure and managed-service design
CI/CD (GitHub Actions, GitLab, Jenkins); build, test and deploy automation
Integrated monitoring; big-data batch design
Recently: DevOps environment on Azure Kubernetes

Direction

Today ReturnAll builds and operates public information services that make public data easy to use (Subway Today, Public Rental Note). In parallel we are developing human-in-the-loop AI agents that share repetitive work such as building, testing, deploying, monitoring and incident response. Agents prepare; people decide.

See services

Company facts

Legal name: Return All Inc. (리턴올 주식회사)
CEO: Yumin Mo
Incorporated: December 13, 2021 (Seoul, Republic of Korea)
Business registration no.: 131-88-02538
Business: Application and system software (AI agents) development and supply; public information services
Engineering: Products built directly by the founder, an application architect with 20 years of experience
Address: Room 321, 3F, 50 Muhak-ro 2-gil, Seongdong-gu, Seoul, Republic of Korea
Email: contact@returnall.dev
Live services: Subway Today ↗ · Public Rental Note ↗
Founder: LinkedIn profile ↗