Senior PHP Engineer

Overview

JAGGAER provides an intelligent Source-to-Pay and Supplier Collaboration Platform that empowers organizations to manage and automate complex processes while enabling a highly resilient, responsible, and integrated supplier base. With 30 years of expertise, we specialize in solving complex procurement and supply chain challenges across various industries.

Our 1,300+ global employees are obsessed with ensuring customers get full value from our products - ultimately enhancing and transforming their businesses.

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.
Principal Responsibilities

- 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.

Position Requirements

- 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.• A degree in Software Engineering, Computer Science, or a related field is a plus.• 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.

Why Join JAGGAER • Work on a mature, business-critical SaaS platform used by global enterprise customers.• Be part of a collaborative, international engineering organization.• Contribute to meaningful product features with real customer impact.• Balance the stabil