Senior PHP Engineer

Jaggaer is a global provider of AI-powered procurement software for complex sourcing, supply and spend. More than 1,400 global enterprises across manufacturing, public sector, higher education and other industries use our platform to manage sourcing, contracts, invoicing, payments and supplier relationships in one place. 

Jaggaer One connects Source-to-Contract, Procure-to-Pay and Supplier Intelligence, with embedded AI (JAI) that helps teams move faster, stay compliant and make better decisions. Our platform supports a supplier community of more than 13 million and manages $2.9 trillion in annual spend. 

Behind the technology is a global team guided by our TEAM values: Transparency, Entrepreneurial Spirit, Accountability and Metrics-Driven Results. For more information, visit www.jaggaer.com.

What We Are Looking For

To support the ongoing development of our platform, we are looking for a Senior PHP Engineer. You will be building and enhancing product features within a large, business-critical PHP application. Your primary focus will be designing, implementing, and improving backend functionality while contributing to the gradual modernization of our platform. This is a hands-on senior engineering role with significant technical ownership.

• Develop and evolve backend functionality for Jaggaer’s hosted B2B SaaS platform based on secure-by-design principles.
• Typically work within a cross-functional team alongside frontend engineers, backend engineers, QA, and Product Owners.
• Take ownership of backend components within a large PHP monolith and contribute to its continuous improvement & refactoring.
• Solve complex technical challenges involving performance, scalability, data integrity, and maintainability.
• Write clean, maintainable PHP code following engineering best practices.
• Participate in code reviews and technical discussions.
• Debug production issues and continuously improve platform stability.
• Leverage AI-assisted software engineering to accelerate implementation, testing, debugging, documentation, and engineering workflows.
• Design effective AI workflows using coding assistants, AI agents, structured prompting, and context management.
• Critically evaluate AI-generated solutions for correctness, security, scalability, maintainability, and business suitability.
• Work effectively across modern engineering practices and legacy systems.

• 7+ years of professional software development experience with strong PHP expertise.
• Experience in developing and maintaining large, long-lived PHP applications, including monolithic architectures.
• Strong knowledge of Symfony or similar PHP frameworks with ORM support.
• Strong understanding of MySQL and relational database design.
• Excellent knowledge of object-oriented programming, SOLID principles, and design patterns.
• Experience with Composer and dependency management.
• Solid understanding of algorithms and data structures.
• Hands-on experience in structuring codebase context (module boundaries, naming conventions, architectural constraints) specifically to improve AI code-generation reliability.
• Ability to critically evaluate AI-generated code and recommendations using sound engineering judgement.
• Comfortable working in a collaborative, international engineering environment.
• Strong focus on software quality and long-term maintainability.
• Good command of written and spoken English.
• Proactivity and appetite for solving challenging technical problems within a cooperative environment.

Nice To Have

• Frontend experience with JavaScript, particularly Backbone.js and/or React.
• Experience with MongoDB or other NoSQL databases.
• Experience with caching technologies such as Memcached.
• Exposure to large-scale SaaS platforms or high-availability systems.
• Familiarity with observability, telemetry, or monitoring tools.
  
• A degree in Software Engineering, Computer Science, or a related field is a plus.

Our Values

At Jaggaer, our business is about people. Our products are built on intellectual property, but the real differentiator is the teams behind them — the way we collaborate, innovate, solve problems, and deliver for customers. TEAM gives us a common set of expectations for how we work together across products, cultures, and geographies.

Transparency – Openness Builds Trust

Candor strengthens relationships, speeds decision-making, and ensures problems are solved together—with customers, teammates, and partners.

Entrepreneurial Spirit – Own It, Drive It, Make It

A customer-focused, problem-solving mindset is at the cornerstone of both organizational and personal growth.

Accountability – Thumbs In, Not Fingers Out

We take responsibility ourselves before pointing elsewhere.

Metrics-Driven Results – Outcomes Over Activities

Data and evidence guide our decisions, help us correct course quickly, and ensure we are delivering meaningful impact.