Senior Backend Engineer (PHP, Symfony) – Fluix Team

Posted Yesterday
28 Locations
In-Office or Remote
Senior level
Software
The Role
Own backend product features end-to-end, including solution design, API and data-model development, deployment, production support, refactoring, testing, observability, and incident resolution. Build scalable workflow automation, synchronization, document-processing, e-signature, and integration capabilities. Collaborate across engineering and support teams, use AI in daily development, improve release processes, and make autonomous product and architectural decisions.
Summary Generated by Built In

Readdle is a pioneering force in the personal productivity space on Apple devices, having shaped the landscape since 2007. Our mission is to empower individuals and teams with innovative technology, enhancing their efficiency and creativity. We are dedicated to crafting exceptional mobile and desktop experiences for those who aspire to achieve more.

Fluix is a B2B workflow automation platform, formed as a subsidiary company to Readdle. Fluix empowers world-class businesses with efficient workflows, operational excellence, fast deployment, customization, and stellar support for unleashing their full potential. Our customers include Siemens, BMW, Scandinavian Airlines, Roche Farma, Zurich Insurance, and hundreds of others.

About the role:

We are looking for a Senior Back-end Product Engineer who takes real end-to-end ownership: from understanding the customer problem and designing the solution, to shipping it, running it in production, and improving it. This is a role for an engineer who works autonomously, thinks in product outcomes rather than tickets, and uses AI as a daily part of the craft. 

You’ll work on the core backend systems behind Fluix – from workflow automation and offline mobile synchronization to document processing, e-signatures, and integrations with enterprise platforms. You’ll build new capabilities while also evolving and improving a mature product used by real customers every day.

What you will do:

  • Own features end-to-end — from understanding the problem and designing the solution to production release and further improvements.
  • Design backend services, APIs, and data models with scalability, reliability, and maintainability in mind.
  • Scope and decompose your own work, make architectural decisions, and present your solutions to the team.
  • Challenge requirements and technical approaches when you see a better, simpler, or more efficient solution.
  • Build new functionality while refactoring and improving the existing codebase, including test coverage.
  • Use data, logs, and customer feedback to investigate problems and make product and technical decisions.
  • Use AI tools daily for development, refactoring, code review, testing, documentation, and investigation, and help improve AI practices across the team.
  • Improve the development lifecycle by automating repetitive work and strengthening observability, alerting, and release processes.
  • Participate in shared on-call and support rotations: investigate production incidents and customer-reported issues, identify root causes, and implement long-term solutions.
  • Prepare release plans and manage deployments.
  • Collaborate closely with Backend, Frontend, iOS, Android, Support, and other teams to deliver reliable product experiences.
  • Continuously improve engineering practices, propose your own initiatives, and share knowledge with the team

About you:

  • 5+ years of backend engineering experience, with experience owning complex features or services end-to-end — from solution design to production.
  • Strong proficiency in PHP and Symfony, with solid knowledge of system and API design, design patterns, clean code practices, and DDD.
  • Hands-on experience with AWS services (EC2, S3, SQS, Lambda, DynamoDB, RDS, IAM), plus familiarity with Kubernetes and serverless architectures.
  • Strong debugging and profiling skills (Xdebug, Blackfire), with experience in CI/CD, automated testing, and observability.
  • Familiarity with JavaScript/TypeScript, Node.js, and frameworks such as ExpressJS or NestJS.
  • You systematically use AI as part of your daily development workflow and can explain what you use it for, what you delegate to it, and how you validate the output. Experience delivering AI/LLM-powered product features is a plus.
  • Good understanding of application security and OWASP principles; experience working with ISO 27001, SOC 2, or similar security standards is a plus.
  • You are autonomous and product-minded: comfortable starting with a problem, designing a solution, making technical decisions, and driving it through to production.

What you will get at Readdle:

  • Customer-centric culture. We put our users at the heart of everything we do. Every team member has the opportunity to engage directly with customers, gaining insights that shape meaningful, delightful experiences for millions worldwide.
  • Relentless growth. We’re committed to mastery in our craft. We take ownership of our work, decisions, and outcomes, and we see feedback as a catalyst for growth. Every challenge is an opportunity to learn, evolve, and raise the bar.
  • Exceptional people, exceptional team. Our greatest strength is our people. We care deeply about each other, work transparently, and celebrate collective success. Together, we build an environment where everyone can do their best work and grow beyond their potential.
  • Real impact. We design products that truly matter. Our focus is on delivering tangible value, simplifying complexity, pushing boundaries, and continuously improving how we build and deliver solutions to our users.
  • Culture of innovation. We embrace curiosity and creativity in everything we do. Fresh ideas are not just welcomed, they’re expected, celebrated, and turned into real innovations that shape the future of our products and company.

Skills Required

  • 5+ years of backend engineering experience
  • Experience owning complex features or services end-to-end from solution design through production
  • Strong proficiency in PHP and Symfony
  • Knowledge of system and API design, design patterns, clean code practices, and domain-driven design
  • Hands-on experience with AWS EC2, S3, SQS, Lambda, DynamoDB, RDS, and IAM
  • Familiarity with Kubernetes and serverless architectures
  • Strong debugging and profiling skills using Xdebug and Blackfire
  • Experience with CI/CD, automated testing, and observability
  • Familiarity with JavaScript, TypeScript, Node.js, ExpressJS, or NestJS
  • Systematic daily use of AI in development, including the ability to explain delegation and validation practices
  • Experience delivering AI or LLM-powered product features
  • Good understanding of application security and OWASP principles
  • Experience with ISO 27001, SOC 2, or similar security standards
  • Autonomous, product-minded approach with the ability to design solutions, make technical decisions, and drive work through production
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The Company
HQ: San Francisco
133 Employees
Year Founded: 2007

What We Do

Readdle creates innovative business and productivity applications that shape Future of work. People can get things done faster and much more efficiently while using Readdle apps such as Spark, Documents, Scanner Pro, PDF Expert, Calendars 5, Printer Pro, etc. Founded back in 2007, Readdle aims to bring best in class apps with comprehensive UI and powerful features. More than 90,000,000 downloads and millions of users worldwide are happily using Readdle apps on a daily basis. Innovative technologies, great user experience and attention to the details made Readdle one of the most significant players in the AppStore. Awards, mentions and reviews by: Forbes, BusinessInsider, Wired, MacWorld, Tech Crunch, Cnet, Gizmodo, USA Today, TheNextWeb, TUAW, BBC, The Verge, O'Reilly, etc.

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