Senior Software Engineer (PHP)

Jahnel Group • Schenectady, NY

3d • Remote

About The Position

Jahnel Group’s mission is to provide the absolute best environment for software creators to pursue their passion by connecting them with great clients doing meaningful work. We get to build some of the most complex and compelling applications for our clients located across the country. We’re a fast-growing INC 5000 recognized company, yet we still work as a very close-knit team (100+ employees). We’re growing like crazy, and if you’re looking for the next place to call home, hit us up for a beer or coffee. Who We’re Looking For We’re looking for a Senior Software Engineer (PHP) to join our team. This role is focused on tackling a large-scale technical debt initiative—modernizing a legacy PHP/Symfony application to current long-term support versions. Our ideal teammate is a senior-level, full-stack engineer who thrives in open-source environments, is comfortable working across the LAMP stack and Angular, and brings an AI-first mindset to development. You don’t just use AI tools—you critically evaluate and refine their output to ensure high-quality, production-ready code.

Requirements

• 5+ years of professional software engineering experience (mid-level to senior only).
• Strong expertise in PHP and Symfony.
• Hands-on experience with the LAMP stack (Linux, Apache, MySQL, PHP).
• Proficiency in Angular (AngularJS and/or modern Angular).
• Solid experience designing and working with RESTful APIs.
• Proven experience handling technical debt, including framework upgrades, deprecation cleanup, and regression testing.
• Strong code review and validation skills, especially with AI-assisted development workflows.
• Demonstrated AI-first/AI-forward mindset—leveraging AI as a core part of development, not just experimentation.
• Experience working with open-source technologies and scripting environments.
• Strong problem-solving skills and ability to adapt across tools and frameworks.
• Self-starter with a strong sense of ownership and accountability.
• Strong communication and collaboration skills.

Nice To Haves

• Experience upgrading legacy PHP/Symfony applications at scale.
• Comfort working across both backend and frontend (true full-stack capability).
• Ability to operate effectively in an open-source, fast-moving environment.
• Developers who can challenge and improve AI-generated code, not just implement it.

Responsibilities

• Lead the upgrade of a legacy application from Symfony 3.4 to Symfony 8 and PHP 7.3 to PHP 8.1.
• Identify, resolve, and eliminate deprecated code across the codebase.
• Execute and validate full regression test suites to ensure system stability post-upgrade.
• Work across the stack using PHP (Symfony), MySQL, and Angular (AngularJS + modern Angular).
• Build and maintain RESTful APIs supporting application functionality.
• Review, validate, and refine AI-generated code, ensuring accuracy, performance, and maintainability.
• Collaborate closely with existing teams in an agile environment (standups, sprint planning, etc.).
• Take ownership of deliverables and drive work independently with minimal oversight.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed
• Number of Employees: 11-50 employees