Senior Full Stack Developer (C#, Python, and PHP) - Indonesia

CLaaS2SaaS; Jakarta Utara; On-site; IDR 6,000,000,000 - 9,000,000,000; Full time

Job summary

CLaaS2SaaS is seeking a Senior Full Stack Developer (C#, Python, PHP) in Indonesia. The role leads design, development, and optimization of scalable web applications and internal systems, shaping architecture decisions and technical improvements across projects.

The ideal candidate will have 5–7 years of hands‑on experience with C#, Python, and PHP, and will mentor junior developers while collaborating closely with stakeholders to deliver reliable, maintainable solutions aligned with business

Qualifications

• 5–7 years of professional software or application development experience.
• Strong hands-on experience with C#, Python, and PHP.
• Experience with APIs, databases, and system integrations.
• Familiarity with version control systems and structured development workflows.
• Ability to work independently while collaborating effectively within a team.

Responsibilities

• Design, develop, enhance, and maintain web applications and internal systems.
• Lead technical discussions, solution architecture, and system design initiatives.
• Translate business and functional requirements into scalable technical solutions.
• Ensure application performance, security, scalability, and maintainability.
• Develop and integrate APIs, third‑party services, and database solutions.
• Conduct code reviews and ensure adherence to coding standards and best practices.
• Troubleshoot and resolve complex technical and system‑related issues.
• Collaborate with cross‑functional teams to ensure timely delivery.
• Mentor junior developers and share knowledge within the team.
• Contribute to technical documentation and process improvements.

Skills

C#

Python

PHP

Web application development

Software architecture

APIs

Databases

Version control

Cloud technologies

Job description

Senior Full Stack Developer (C#, Python, and PHP) - Indonesia

Experience Level: Minimum 5–7 years of relevant professional experience

About the Role

We are looking for a highly capable Senior Developer to lead the design, development, and optimization of scalable web applications and business systems. This role requires strong technical expertise, hands‑on development experience, and the ability to contribute to architecture decisions and technical improvements across projects.

The ideal candidate is experienced in building enterprise‑grade applications, troubleshooting complex technical issues, and collaborating closely with stakeholders to deliver reliable and maintainable solutions aligned with business objectives.

Key Responsibilities

• Design, develop, enhance, and maintain web applications and internal systems
• Lead technical discussions, solution architecture, and system design initiatives
• Translate business and functional requirements into scalable and effective technical solutions
• Ensure application performance, security, scalability, and maintainability
• Develop and integrate APIs, third‑party services, and database solutions
• Conduct code reviews and ensure adherence to coding standards and development best practices
• Troubleshoot and resolve complex technical and system‑related issues
• Collaborate with cross‑functional teams to ensure timely and high‑quality project delivery
• Mentor junior developers and support technical knowledge‑sharing within the team
• Contribute to technical documentation, process improvements, and continuous development initiatives

Requirements

• Minimum 5–7 years of professional experience in software or application development
• Strong hands‑on experience with C#, Python, and PHP
• Strong understanding of web application development and software architecture
• Experience working with databases, APIs, and system integrations
• Familiarity with version control systems and structured development workflows
• Strong analytical and problem‑solving skills with the ability to handle complex technical challenges
• Ability to work independently while collaborating effectively within a team
• Experience mentoring or guiding junior developers is an advantage
• Exposure to cloud technologies or enterprise systems is a plus