**Company Description**
At KMS Technology Mexico, we are passionate about building innovative software solutions that drive impact. As part of an international tech company, we offer a collaborative and inclusive environment where your ideas matter and your growth is our priority.
We are seeking a highly skilled Senior Full Stack Developer to join our engineering team. We need an engineer who excels in high-scale backend environments while remaining proficient in modern frontend frameworks.
**Responsibilities**:
**Backend Engineering (80% Focus)**
- Design, build, and maintain robust server-side logic using PHP and the Laravel framework.
- Architect and implement efficient, scalable GraphQL APIs to support internal and external integrations.
- Optimize database queries and schema designs (MySQL/PostgreSQL) for high-concurrency transaction processing.
- Ensure the highest levels of security and PCI compliance across all backend services.
- Write comprehensive unit and integration tests to maintain the reliability of our core payment engine.
**Frontend Development (20% Focus)**
- Develop and maintain user-facing features using React and modern state management tools.
- Consume GraphQL APIs effectively on the frontend to create seamless user experiences for merchants and partners.
- Ensure a consistent UI/UX by implementing responsive designs and reusable component libraries.
**Collaboration & Leadership**
- Participate in architectural discussions and provide technical guidance for complex feature sets.
- Conduct thorough code reviews,



promoting best practices in security, readability, and performance.
- Work closely with Product and DevOps teams to ensure smooth deployment cycles and high system availability.
**Qualifications** Required Skills & Experience**
- 5+ years of professional experience in full-stack software development.
- Expertise in PHP and Laravel: Deep understanding of the framework’s internals, service providers, and Eloquent.
- Strong GraphQL Experience: Proven track record of designing and implementing GraphQL APIs (not just consuming them).
- Database: Experience with relational databases at scale (query optimization, indexing, and transactional integrity).
- Git, modern CI/CD pipelines, and containerization (Docker).
**Preferred Skills & Knowledge**
- Experience in the Payments or Fintech industry.
- Familiarity with PCI-DSS compliance standards.
- Previous experience in a remote-first, senior-level position.
**Additional Information** Location**:Guadalajara,**Jalisco, Mexico (Hybrid)
**Benefits and Perks**
**_Perks you enjoy at KMS Mexico_**
- Mexican law benefits
- 15 days of PTO (in year zero, from the first year onwards it is 3 days per year).
- 5 days' leave for the death of immediate family members, negotiable.
- Major Medical Expenses Insurance with coverage for immediate dependents (spouse and children).
- Annual performance bonus (10% of annualized salary).
- Annual salary adjustment.
- Employee Referral Bonus.
- Paid Certifications / Courses
- Coursera License.
- 5% Savings Fund.
- 5% Grocery Vouchers.

📌 Senior Fullstack Software Engineer (PHP/react) (Guadalajara)
🏢 KMS Technology
📍 Guadalajara