Senior PHP Backend Developer

**Top 3 reasons to join us**:

- The leading IT companies in Vietnam
- Good working environment with modern office
- Opportunity to onsite

**Job description**:
We are seeking a highly skilled and experienced Senior PHP Developer to take on a critical role in maintaining, analyzing, and modernizing our established backend systems. This position offers a unique challenge to dive deep into an existing platform to ensure its stability while strategically planning and executing its technological evolution. You will be a key player in solving current business problems and shaping the future technical direction of our products.

** This position is responsible for**:

- Take lead responsibility for understanding the current system architecture and source code developing with an old PHP framework.
- Analyze, debug, and resolve complex issues within the existing PHP codebase to ensure business continuity.
- Lead the analysis and propose viable, data-driven solutions for modernizing the platform, recommending new frameworks/technologies, architectural patterns.
- Design, develop, and maintain robust, scalable, and secure backend services, APIs, and business logic.
- Integrate with various payment gateways and processors, including ACH, credit/debit cards processing, and digital wallets like Google Pay/Apple Pay.
- Collaborate with product managers and clients to refine requirements and translate business needs into technical solutions.
- Implementing with high-quality, clean source code, comprehensive unit tests, managing code through version control, and participating in peer code reviews.
- Create and maintain clear technical documentation for the existing system and future enhancements.
- Mentoring skills, providing technical guidance/design is a plus.
- Manage all development stages from initial specification and design through to integration, release, and ongoing maintenance. Follow tightly the Agile methodology.

**Your skills and experience**:
** Core Development**:

- Extensive experience in commercial software development with a strong focus on **backend PHP systems.**
- Expert-level proficiency in PHP and a deep understanding of its core principles.
- **Proficiency with Azure SQL**
- Extensive experience with Restler PHP frameworks is a plus.
- Proven ability to quickly understand, navigate, and work within large, complex, and legacy codebases.
- Exceptional debugging, analytical, and reverse-engineering skills.
- Direct experience with older, less common PHP frameworks or custom-built systems is a significant advantage.

** Architecture & Design**:

- Solid experience in designing, building, and maintaining **RESTful APIs.**
- Demonstrable knowledge of modern architectural patterns; experience with microservices is a significant plus.
- Solid understanding of Object-Oriented Programming (OOP) principles and design patterns.
- Familiarity with containerization technologies like Docker and Kubernetes is a plus.

** Fintech & Payments Domain**:

- Experience working on SaaS platforms.
- Prior experience in the fintech or payment processing industry is highly desirable.
- Familiarity with payment methods such as ACH, card processing, and digital wallets (Google Pay/Apple Pay).

** Professional & Soft Skills**:

- Experience in leading and mentoring other developers is a plus.
- Excellent analytical skills with a talent for debugging and resolving complex technical issues.
- Experience working in an Agile/Scrum development environment.
- A strong commitment to writing clean, testable, and maintainable code.
- Strong verbal and written English communication skills are a plus.

**Why you'll love working here**:

- Competitive salary and performance-based bonuses.
- Opportunities for continuous professional development, including formal training and certifications.
- A supportive and collaborative work environment with friendly, highly-skilled colleagues.
- The chance to work on challenging and impactful projects with modern technologies.