Senior Full Stack Engineer - C#, Python, PHP & APIs

CLaaS2SaaS; Jakarta Pusat; On-site; IDR 300,000,000 - 420,000,000; Full time

Job summary

CLaaS2SaaS is seeking a Senior Full Stack Developer to design, build, and enhance scalable web applications and business systems. You will work on backend services, APIs, databases, and frontend components, while collaborating with cross‑functional teams on architecture and security considerations.

The role requires strong hands‑on experience in at least one backend language and framework, plus solid frontend skills with React.js and modern web technologies.

Qualifications

• 5–7 years of professional software development experience.
• Proficiency in at least one backend language (PHP, Python, C#, Java, or Node.js).
• Experience with at least one backend framework (Laravel, Django, ASP.NET Core, Spring Boot).
• Frontend experience with a framework/library (e.g., React.js) and HTML5/CSS3/JavaScript.
• Experience with databases (MS SQL Server, MySQL/MariaDB, PostgreSQL, or NoSQL).
• Knowledge of REST APIs, JSON, and third‑party integration.
• Strong Git skills including branching, PRs, and code reviews.
• Ability to work independently and in a team.

Responsibilities

• Design, develop, test, and maintain web applications and business systems.
• Develop and maintain backend services, APIs, databases, and system integrations.
• Develop frontend components and integrate them with backend services.
• Participate in system design, architecture discussions, and technical planning.
• Develop and integrate REST APIs and third‑party services.
• Troubleshoot application, integration, and performance issues.
• Conduct code reviews and follow established development standards.
• Collaborate with cross‑functional teams to deliver technical solutions.
• Contribute to security, performance, scalability, and maintainability.
• Provide guidance and support to junior developers as needed.

Skills

Backend development

Frontend development

REST APIs

Git

OO programming

Problem solving

Tools

Laravel

Django

ASP.NET Core

Spring Boot

React.js

Job description

CLaaS2SaaS is seeking a Senior Full Stack Developer to design, build, and enhance scalable web applications and business systems. You will work on backend services, APIs, databases, and frontend components, while collaborating with cross‑functional teams on architecture and security considerations.

The role requires strong hands‑on experience in at least one backend language and framework, plus solid frontend skills with React.js and modern web technologies.