Senior PHP developer

While technology is the heart of our business, a global and diverse culture is the heart of our success. We love our people and we take pride in catering them to a culture built on transparency, diversity, integrity, learning and growth.


If working in an environment that encourages you to innovate and excel, not just in professional but personal life, interests you- you would enjoy your career with Quantiphi!

About Quantiphi:

Quantiphi is an award-winning Applied AI and Big Data software and services company, driven by a deep desire to solve transformational problems at the heart of businesses. Our signature approach combines groundbreaking machine-learning research with disciplined cloud and data-engineering practices to create breakthrough impact at unprecedented speed.

Quantiphi has seen 2.5x growth YoY since its inception in 2013, we don’t just innovate - we lead.

Headquartered in Boston, with 4,000+ professionals across the globe. Quantiphi leverages Applied AI technologies across multiple a. Industry Verticals (Telco, BFSI, HCLS etc.) and is an established Elite/Premier Partner of NVIDIA, Google Cloud, AWS, Snowflake, and others.

We’ve been recognized with:

• 17x Google Cloud Partner of the Year awards in the last 8 years.

• 3x AWS AI/ML award wins.

• 3x NVIDIA Partner of the Year titles.

• 2x Snowflake Partner of the Year awards.

• We have also garnered top analyst recognitions from Gartner, ISG, and Everest Group.

• We offer first-in-class industry solutions across Healthcare, Financial Services, Consumer Goods, Manufacturing, and more, powered by cutting-edge Generative AI and Agentic AI accelerators.

• We have been certified as a Great Place to Work for the third year in a row- 2021, 2022, 2023.

Be part of a trailblazing team that’s shaping the future of AI, ML, and cloud innovation.

Your next big opportunity starts here!

For more details, visit:Websiteor LinkedIn Page.

Role:Senior PHP Developer (Customizations & Legacy Systems)

Experience Level:7+ years experience

Work Location:Canada

Role Overview:

We are seeking a Senior PHP Developer to join our core engineering team. In this role, you will be responsible for building bespoke functionality and high-impact customizations for our global client base. Our environment is unique: we operate a robust, "raw" PHP application deployed in dedicated AWS instances for each customer. You will be the bridge between our core product and specific customer needs, ensuring that new features are scalable, secure, and seamlessly integrated into our PostgreSQL/MySQL backends.

Key Responsibilities:

• Custom Feature Development: Design and implement new, customer-specific functionality within our core PHP application.

• Legacy Code Optimization: Maintain and refactor "old-school" procedural and object-oriented PHP code to improve performance and maintainability.

• Database Management: Write complex SQL queries, optimize schemas, and manage data integrity across PostgreSQL and MySQL environments.

• Multi-Instance Deployment: Work within an AWS-based architecture where you will help manage and deploy code to unique customer environments.

• Security-First Coding: Since we do not use a framework, you will be responsible for manually implementing security best practices (e.g., preventing SQL injection, XSS, and CSRF).

• Collaboration: Partner with project managers and the core dev team to ensure customizations align with the long-term product roadmap.

Basic Qualifications:

• You must be deeply comfortable writing "Vanilla" or "Raw" PHP without the use of modern frameworks (Laravel, Symfony, etc.).

• Database Mastery: Advanced proficiency in PostgreSQL and MySQL. You should be able to write and optimize complex queries without an ORM (like Eloquent or Doctrine).

• Web Fundamentals: Strong command of HTML5, CSS3, and JavaScript.

• Version Control: Expert knowledge of Git and branching strategies.

• Linux/Server Environments: Comfortable navigating Linux command lines for troubleshooting and configuration.

Other Qualifications (OQs):

• AWS Experience: Familiarity with EC2, RDS, and S3.

• Security Expertise: A proven track record of securing legacy applications against modern vulnerabilities.

• Refactoring Experience: Experience migrating or cleaning up legacy codebases without breaking existing functionality.

What’s in it for YOU at Quantiphi:

• Make an impact at one of the world’s fastest-growing AI-first digital engineering companies.

• Upskill and discover your potential as you solve complex challenges in cutting-edge areas of technology alongside passionate, talented colleagues.

• Work where innovation happens - work with disruptive innovators in a research-focused organization with 60+ patents filed across various disciplines.

• Stay ahead of the curve—immerse yourself in breakthrough AI, ML, data, and cloud technologies and gain exposure working with Fortune 500 companies.