Senior PHP Software Engineer

Location: Fully Remote (Milwaukee, WI) Employment Type: Full-Time Are you a senior-level software engineer who enjoys solving complex integration challenges while building scalable enterprise applications? Trissential is hiring a Senior PHP Software Engineer to join our client's team. This is an opportunity to work on high-impact eCommerce and ERP integrations, contribute across the full application stack, and play a key role in driving enterprise technology solutions that directly support business growth. What's in It for You? Work on mission-critical enterprise integrations connecting eCommerce, ERP, and internal business systems Leverage modern integration technologies including Boomi, REST APIs, and enterprise middleware solutions Make a measurable impact by improving application performance, reliability, and scalability Collaborate with technical leaders, business stakeholders, and vendors on innovative enterprise solutions Mentor and support fellow engineers while expanding your own leadership capabilities Enjoy a fully remote work environment while contributing to large-scale technology initiatives Participate in Agile development teams focused on continuous improvement and innovation Your Role & Responsibilities Enterprise Integrations & APIs Design, develop, and maintain integrations between eCommerce platforms, ERP systems, and internal applications Build and support RESTful APIs and enterprise data exchange processes Manage data synchronization, transformation, validation, and interoperability across multiple systems Lead complex integration initiatives involving OroCommerce, IFS ERP, and third-party platforms Serve as a technical expert for integration architecture and API development Troubleshoot and resolve complex integration design and implementation challenges Promote reliable, scalable, and maintainable integration practices across the organization Application Development Support, enhance, and customize OroCommerce applications using PHP and Symfony Contribute across both front-end and back-end development initiatives Develop enterprise applications using PHP, Oracle PL/SQL, JavaScript, HTML, and CSS Ensure applications meet performance, security, scalability, and maintainability standards Conduct code reviews and provide technical feedback to improve software quality Coach and mentor junior and mid-level developers Champion software engineering best practices and coding standards Production Support & Reliability Monitor, troubleshoot, and maintain enterprise applications and integrations Perform root cause analysis and implement long-term solutions Support deployments and ensure successful release management activities Lead investigation and resolution of complex production incidents Improve monitoring, performance optimization, and operational processes Participate throughout the SDLC including development, testing, deployment, and support Collaboration & Delivery Partner with business stakeholders, IT teams, and external vendors to deliver successful solutions Participate in Agile ceremonies including sprint planning, reviews, and backlog refinement Create and maintain technical documentation for integrations, applications, and workflows Assist with project estimation, technical analysis, and architecture discussions Share technical knowledge through mentoring, reviews, and collaborative problem-solving Drive continuous improvement initiatives across development and support teams Skills & Experience You Should Possess 8+ years of software engineering experience with both front-end and back-end development Strong expertise in PHP development, ideally within Symfony-based environments Experience developing and supporting REST APIs and enterprise integrations Experience working with integration platforms such as Boomi, MuleSoft, Workato, or similar technologies Advanced Oracle SQL and PL/SQL development experience Experience supporting production systems and resolving complex application issues Strong understanding of JSON, OAuth, system interoperability, and integration patterns Proficiency with JavaScript, HTML, and CSS Experience working within Agile software development environments Excellent troubleshooting, analytical, and problem-solving abilities Strong communication and collaboration skills Demonstrated technical leadership and mentoring experience Bonus Points If You Have Hands-on experience with OroCommerce development and customization Experience integrating with IFS ERP environments Expertise designing enterprise-scale Boomi integrations Experience with CI/CD pipelines and DevOps practices Background supporting eCommerce technology ecosystems Experience leading integration modernization initiatives Education & Certifications You Need Bachelor's Degree in Computer Science, Information Technology, Software Engineering, or a related technical field Relevant integration, cloud, or software engineering certifications are a plus What We Offer At Trissential, we believe exceptional professionals deserve meaningful work, strong support, and opportunities to continue growing. By joining our client's team, you'll collaborate with talented professionals while working on enterprise-scale technology initiatives Competitive Compensation – You choose the model that works best for you, both with company-sponsored benefits! $110,000–$118,000 annually or $68–$73 per hour. Final compensation is determined based on skill alignment, years of experience, and fair, market-based rates by geography Comprehensive Benefits for you and your dependents – Extensive Medical Plans, Dental, Vision, HSA with company contribution, company sponsored Life Insurance and Short / Long term disability insurance, a host of voluntary plans including legal, hospital, accident, pet wellness, and 401k with matching Paid Holidays and Paid Time Off Career Development and Advancement – Expleo is a global company in 29 Countries worldwide with a high focus on development Strong Team Culture – Collaborate with experienced professionals who value precision, performance, and teamwork Please note: This role is open only to candidates who are authorized to work in the United States Ready to be part of something exciting? If you're passionate about enterprise integrations, modern application development, and solving complex technical challenges, we want to hear from you. Join Trissential and help shape the future of enterprise technology solutions while advancing your career as a Senior PHP Software Engineer