About the Role

About The Role

The Backend Engineer at LLL Inc. will design and build scalable backend systems and APIs for enterprise applications, primarily serving Japanese and ASEAN clients. This role involves working with modern backend technologies and cloud infrastructure to deliver robust solutions.

Key Responsibilities

Design and develop RESTful and GraphQL APIs
Design database schemas and optimize queries
Build microservices architecture
Deploy and manage applications on AWS/GCP/Azure
Implement authentication, authorization, and security best practices
Monitor application performance and optimize bottlenecks
Write unit and integration tests
Create technical documentation
Collaborate with frontend engineers and Japanese stakeholders

Required Qualifications

3–5 years of backend development experience
Strong expertise in one or more: Node.js (NestJS, Express, Fastify), Python (Django, FastAPI), Go, Rust
Experience with Laravel or NestJS frameworks — plus
Expert in SQL and relational databases (PostgreSQL, MySQL)
Experience with NoSQL databases (MongoDB, Redis)
Understanding of API design principles and best practices
Knowledge of authentication protocols (JWT, OAuth, SAML)
Familiarity with cloud platforms (AWS, GCP, or Azure)
Version control with Git
Strong problem-solving skills

Preferred Qualifications

Japanese language proficiency (N3 or higher) — plus
Experience with message queues (RabbitMQ, Kafka)
Knowledge of caching strategies (Redis, Memcached)
Microservices architecture experience
DevOps skills (Docker, Kubernetes)
Experience with serverless architecture (AWS Lambda)
Prior work with Japanese clients or companies

Requirements

Backend development experience

3–5 years of backend development experience is required.

Node.js, Python, Go, Rust

Strong expertise in one or more of these programming languages is essential.

SQL and relational databases

Expertise in SQL and relational databases like PostgreSQL and MySQL is necessary.

API design principles

Understanding of API design principles and best practices is required.

Cloud platforms

Familiarity with cloud platforms such as AWS, GCP, or Azure is needed.

Nice to Have

Japanese language proficiency

Proficiency in Japanese (N3 or higher) is a plus.

Message queues experience

Experience with message queues like RabbitMQ or Kafka is beneficial.

DevOps skills

Skills in DevOps tools such as Docker and Kubernetes are advantageous.