Senior Fullstack PHP Developer

Semaphore Consulting; Jakarta Utara; On-site; IDR 200.000.000 - 300.000.000; Full time

Job summary

A leading educational technology company in Jakarta Utara is seeking a Fullstack Senior PHP Developer to enhance their software solutions. The role requires at least 5 years of PHP development experience, focusing on performance optimization and mentoring junior developers. The ideal candidate will collaborate with various teams to ensure high-performing features, while having a strong command of English. This is an opportunity to work on impactful products in the education sector.

Benefits

Opportunity to shape the technical direction

Collaborative work environment

Impactful projects in education

Qualifications

• 5+ years of professional PHP development experience (Laravel, Slim, or similar frameworks).
• Strong expertise in SQL query optimization (MySQL or PostgreSQL).
• Solid understanding of debugging and profiling tools.

Responsibilities

• Profile and optimize code, APIs, and database queries to improve performance.
• Refactor legacy code for maintainability and security.
• Collaborate with product managers and DevOps to deliver features.

Skills

PHP development experience

SQL query optimization

Debugging and profiling

REST APIs

Caching and indexing

Fluent English

Tools

XDebug

Microsoft Azure

Job description

Overview

At Prestia, we build robust, user-focused software solutions that empower schools and educators to do their best work. We’re now looking for a Fullstack Senior PHP Developer with a strong track record in troubleshooting, optimizing performance, and fine-tune database queries to help us scale our products and deliver even greater value to our customers both locally and internationally.

What you’ll do

• Profile and optimize code, APIs, and database queries to improve performance
• Refactor legacy code to enhance maintainability, scalability, and security
• Collaborate with product managers, QA, and DevOps to deliver reliable, high-performing features
• Mentor junior developers and foster best practices across the engineering team
• Continuously monitor and improve application performance, availability, and reliability

What we’re looking for

• 5+ years of professional PHP development experience (Laravel, Slim, or similar frameworks)
• Strong expertise in SQL query optimization (MySQL or PostgreSQL)
• Solid understanding of debugging, profiling, and performance tuning tools such as XDebug or others
• Experience with REST APIs and integrating third-party services
• Familiarity with caching, indexing, and scalable architecture patterns
• Fast learner, friendly, team player, hardworking, reliable and trustworthy
• Able to speak and write fluent English

Bonus:

• Experience with Education technology platforms or analytics systems
• Experience with CI/CD and working with Microsoft Azure

Work on impactful products that make a difference in education

Collaborate with a passionate, innovative, friendly team

Opportunity to shape the technical direction of our platforms

Application questions

1. What’s your expected monthly basic salary?
2. Which of the following types of qualifications do you have?
3. How many years’ experience do you have as a PHP developer?
4. How would you rate your English language skills?
5. Which of the following languages are you fluent in?
6. Which of the following programming languages are you experienced in?