Senior PHP Engineer

About airSlate

airSlate is a global SaaS technology company that develops no-code workflow automation, electronic signature, and document management solutions. Our award-winning products - SignNow, pdfFiller, DocHub, airSlate WorkFlow, Instapage, and US Legal Forms - serve over hundreds of millions of  users and more than one million customers worldwide, helping organizations of every size digitize processes, improve efficiency, and transform how they work.

We're in an exciting phase of growth and transformation, with teammates in more than 20 countries across three continents and main hubs in the United States, Poland, Romania, Ukraine and Philippines. 

At airSlate, we're building value for customers and a culture where growth and innovation go hand in hand. We're looking for people eager to shape products, scale a company, and thrive in a fast-moving environment.

About your pdfFiller Team

We are a team of 120+ passionate builders shaping the future of our online PDF creator and editor — pdfFiller.

Every month, more than 10 million people rely on pdfFiller to create and edit PDFs, send documents for signing, and securely store their files — all within one intuitive platform. With unlimited storage, unlimited templates, and seamless cross-platform integration, pdfFiller is designed to help users get their work done faster and smarter.

And now we are looking for a Senior Software Engineer (PHP) to join us and play an important role in the next chapter of our product's evolution.

• Work on the CORE functionality of a large, high-load product used by millions worldwide.
• Direct influence on product stability, scalability, and architectural direction.
• A mix of challenges: backend engineering, performance optimization, internal tooling, platform integrations.
• Close collaboration with DevOps, Security, Performance Engineering, and cross-functional product teams.
• Opportunity to contribute to long-term architectural evolution and engineering best practices.

• Develop, maintain, and enhance CORE platform components and internal backend services.
• Shape architectural decisions, contribute to system simplification and modernization.
• Build secure, reliable, high-performance backend solutions.
• Work closely with DevOps to improve CI/CD, observability, deployment workflows, and system reliability.
• Support and elevate security initiatives, including authentication/authorization approaches (RBAC/ABAC).
• Participate in code reviews, design discussions, and incident resolution.
• Collaborate with cross-functional teams to enable new product capabilities built on top of the CORE platform.

• 5+ years of backend engineering experience, including 3+ years with PHP
• Strong expertise with PHP and the Laravel ecosystem
• Solid experience with relational databases (MySQL, PostgreSQL) and distributed storage systems (e.g., Redis)
• Understanding of secure coding principles and modern authentication/authorization approaches
• Experience with Docker, Kubernetes, or other containerized environments
• Background working with high-load systems or platform-level services is a strong advantage
• English proficiency suitable for technical discussions

What we offer

Flexible working environment - Our teams operate across the globe. We value in‑person collaboration in our hubs, but we also embrace remote and hybrid working. You can work from one of our offices in the United States, Poland, Romania or Ukraine, or remotely from many countries.

Competitive compensation and stock options - We offer salaries that reflect local market conditions and experience,  plus a performance-based bonus system and stock options so you share in the company's growth.

Professional growth and learning - We invest in your development through courses, conferences, and access to learning resources. We encourage career growth and internal mobility, supporting teammates who want to explore new opportunities within airSlate.

Health and well‑being - We provide comprehensive benefits tailored to each country, including health coverage, wellness programmes and access to fitness options. We also dedicate quarterly company-wide Mental Health Days, when everyone takes time off to rest and recharge.

Family‑friendly culture - Family life is part of who we are, and we embrace it in many forms. From flexibility for parents to our airSlate Junior Club for kids, to company-wide family days and our pet-friendly approach, we're committed to making work and life easier to balance.

Giving back - We support charitable initiatives around the world through the airSlate Care programme. Our current focus includes humanitarian aid in Ukraine and other regions, matching employee donations and supporting causes chosen by our teams.

Open communication - We encourage transparent dialogue at all levels. From team discussions to company-wide Q&A sessions with our CEO, we make sure everyone has the chance to be heard and to influence how we grow.

It is airSlate's policy to comply with all applicable equal employment opportunity laws by making all employment decisions without unlawful regard or consideration of any individual's race, religion, ethnicity, color, sex, sexual orientation, gender identity or expressions, transgender status, sexual and other reproductive health decisions, marital status, age, national origin, genetic information, ancestry, citizenship, physical or mental disability, veteran or family status or any other basis protected by applicable national, federal, state, provincial or local law. airSlate's policy prohibits unlawful discrimination based on any of these impermissible bases, as well as any bases or grounds protected by applicable law in each jurisdiction. If you need assistance or an accommodation during the application process because of a disability, it is available upon request. airSlate is pleased to provide such assistance and no applicant will be penalized as a result of such a request. Pursuant to relevant law, where applicable, airSlate will consider for employment qualified applicants with arrest and conviction records.

Read our Recruitment Privacy Notice to Learn how we process your personal information.