Senior PHP Engineer

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.

• 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.
• 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 stability of an established platform with ongoing technical evolution.
• Use modern AI-assisted engineering tools as part of your everyday development workflow.

What We Offer

• A positive and enjoyable working environment within a young, motivated, and collaborative team. 
• Competitive salary and clear career development opportunities. 
• Short communication channels and genuine room for creativity and initiative. 
• An international, professional environment with exciting challenges and growth opportunities. 
• An open-minded and dynamic corporate culture with access to training and development. 
• Private health insurance, FitPass, summer and winter parties, employee vouchers, New Year gifts, flexible working hours, and a wide range of work-life balance benefits.

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.

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