Developer (Go / React / Flutter / Cloud)

Our HCM is an enterprise HR platform currently in active operation and continuous expansion. The system covers Core HR, Attendance, Payroll, Advance HR, Employee Self-Service (ESS), HR Development, Workflow Automation, System Integrations, and Custom Modules for Enterprise Clients.

We are expanding the development team to build new features while maintaining and enhancing existing modules, working closely with both local and international teams. You will be responsible for building high-performance services in Go, stuning frontend and UX/UI in React with TypeScript and maintaining and modernizing core logic in C#/.NET and SQL. As a key member of a polyglot environment, you will bridge the gap between our high-concurrency modern microservices and our robust foundation backend, ensuring a seamless experience for our users.

Key Responsibilities

Develop new features and enhance existing functionalities across Core HR, Attendance, Payroll, Advance HR, Employee Self-Service (ESS), HR Development, Workflow Automation, System Integrations

Maintain and refactor existing code to improve performance, scalability, and maintainability

Frontend Excellence: Design and implement scalable, reusable components using React and TypeScript, ensuring strict type safety and optimal bundle performance.

High-Performance Backend: Develop and maintain mission-critical microservices using Go, focusing on high concurrency, low latency, and clean API design (REST/gRPC).

Backend foundation transformation: Support and refactor existing business logic within our C#/.NET ecosystem, transitioning legacy services toward modern architectures where necessary.

Database Design: Write complex, optimized SQL queries and manage schema migrations. You should understand indexing, execution plans, and how to resolve locking issues.

System Ownership: Take end-to-end ownership of features—from database schema design to frontend deployment and observability (monitoring/logging).

Participate in technical design and solution discussions

Work closely with Business Analysts to clarify requirements and ensure correct implementation

Perform code reviews and contribute to code quality standards

Write unit tests and ensure sufficient test coverage

Investigate and fix production issues when required

Technical Stack

Backend:

• Golang
• RESTful APIs
• Microservices architecture
• Cloud

Database:

• MariaDB
• Schema design and complex SQL queries

Frontend:

• React (Web)
• Flutter (Mobile)

Your Profile

Experience

Have experiences in professional software development (New graduate are welcome), 5+ years

for Senior developer.

Strong hands-on experience with backend development (preferably Golang)

Solid understanding of frontend development with React

Experience working with relational databases and complex queries

Familiar with API-based and microservices architectures

Able to work independently and take ownership of tasks

Experience collaborating with BA, QC, Developers, and cross-functional teams

Comfortable working in a large development team, including international teams

Skills & Competencies

Experience testing HR / Payroll / Enterprise systems

Exposure to large-scale SaaS or multi-tenant systems

Frontend (React & TypeScript)

• Expertise: Deep understanding of React patterns and state management

• TypeScript: Mastery of advanced types (Generics, Mapped Types, Discriminated

Unions) to ensure "compile-time safety" across the stack.

• Build and tools: Experience with Vite or Webpack, including performance

optimization (code splitting, tree shaking).

Backend (Go & C#)

• Go: Proficiency in Go routines, channels, and the standard library. Experience with

frameworks like Gin, Echo, or Fiber.

• C#/.NET: Strong foundation in OOP, Dependency Injection, and Entity Framework.

Ability to debug and refactor legacy .NET Framework or Core codebases.

• Architecture: Familiarity with Microservices, Event-Driven Architecture, and

Message Queues (Kafka, RabbitMQ).

Data & DevOps

• SQL: Advanced SQL skills (PostgreSQL or SQL Server). Experience with

performance tuning and complex transactions.

• Infrastructure: Competency with Container Docker, Kubernetes, and CI/CD

pipelines (GitHub Actions, GitLab CI, or Azure DevOps).

• Cloud: Eexperience with AWS, Azure, GCP or another provider.

Engineering and best practices

• Experince in Agile/Scrum environment with highly collaboration

• Experince in implementing Unit Testing, Debugging

• Experince in Application performance optimization

• Experince in AI coding with production grade is plus

• Experince in Mobile development like native or Flutter is plus

Language

Able to communicate in English in a professional working environment (reading technical documents, participating in discussions with international team members)

We offer

Work on a large-scale enterprise HR platform used by real businesses.

Opportunity to contribute to both new development and long-term system evolution.

Exposure to modern backend (Go, microservices) and frontend (React, Flutter) technologies.

Stable product with clear technical direction.

Market-competitive compensation.