Sr Full Stack Engineer

Posted Yesterday
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Dublin, IRL
In-Office
Senior level
Cloud • Information Technology • Security • Software
The Role
Design, develop, test, and maintain scalable backend applications, SDKs, and tools for AI Security solutions. Build RESTful APIs and multi-service systems, optimize performance and reliability, troubleshoot production issues, and collaborate with product, QA, frontend, and data science teams. Apply secure coding and modern architecture practices while contributing to cloud-native deployments, testing, and continuous delivery improvements.
Summary Generated by Built In

At F5, we strive to bring a better digital world to life. Our teams empower organizations across the globe to create, secure, and run applications that enhance how we experience our evolving digital world. We are passionate about cybersecurity, from protecting consumers from fraud to enabling companies to focus on innovation. 
 

Everything we do centers around people. That means we obsess over how to make the lives of our customers, and their customers, better. And it means we prioritize a diverse F5 community where each individual can thrive.

Role Summary 

F5 is growing its AI Security team and is looking for an ambitious, versatile, and self-driven Backend Software Engineer. In this role, you will design, develop, test, and maintain scalable backend applications that power world-first AI Security solutions. Your contributions will be crucial to building out our AI Security web application, ensuring robust, reliable, and cutting-edge technology to successfully meet business and customer needs. 

This role offers an exciting opportunity to collaborate with a multidisciplinary team, solve technically challenging problems, and grow professionally in a culture that values innovation, collaboration, and team excellence.  

Tech Stack We Use 

  • Backend: Python, FastAPI, Pydantic, uvicorn  
  • Frontend: Typescript, Vue3, Vite  
  • Source Control: GitLab  
  • Continuous Delivery: ArgoCD  
  • Deployment: AWS (Dockerized applications, Helm charts, Kubernetes) 

Key Responsibilities 

Build and Deliver Exceptional Technology 

  • Design, develop, and maintain scalable backend applications, SDKs, and tools to support AI Security solutions at scale.  
  • Collaborate with the product, QA, frontend, and data science teams to deliver seamless, user-friendly, high-performance software.  
  • Write clean, efficient, and maintainable code, adhering to F5’s best practices in software development and secure coding. 

Ensure Quality, Performance, and Architecture 

  • Test, troubleshoot, and optimize backend services to ensure maximum scalability, performance, and reliability.  
  • Architect backend features based on best practices in modern software design and scalable architecture patterns

Continuous Improvement and Collaboration 

  • Proactively suggest and implement solutions to challenges encountered during development cycles.  
  • Thrive in a collaborative environment, working cross-functionally to ensure alignment with business and technical goals.  
  • Stay updated with emerging technologies, leveraging new tools and features where appropriate to improve backend systems. 

Qualifications and Skills 

Required Experience 

  • At least 5 years’ experience developing server-side applications using Python, FastAPI, or equivalent frameworks.  
  • Strong understanding of database technology, including platforms like PostgreSQL or MySQL.  
  • Demonstrated expertise in building, debugging, and maintaining RESTful APIs and multi-service backend systems.  
  • Excellent troubleshooting skills to debug and analyze complex software systems.  
  • A passion for owning and delivering high-quality backend solutions that meet business and customer needs. 

Core Skills 

  • Critical Thinking: Structured problem-solving approach when debugging and troubleshooting multi-service applications.  
  • Collaboration: Proven ability to work both independently and as part of a larger engineering team.  
  • Communication: Clearly communicate ideas, features, and risks to technical and non-technical collaborators.  
  • Time Management: Ability to prioritize and manage multiple tasks effectively while meeting deadlines. 

Preferred Skills 

  • Familiarity with Dockerized applications, Kubernetes, and cloud environments like AWS.  
  • Hands-on experience with testing and delivery pipelines, including automated CI/CD workflows (e.g., ArgoCD).  
  • Knowledge of secure coding practices and deploying applications in mission-critical production environments

Why Join the F5 AI Security Team? 

At F5, Backend Engineers are critical to building AI-driven, scalable solutions that deliver empowerment and innovation to customers across the globe. Here’s why you’ll love it here:  

  • Technical Excellence: Work with modern technologies and solve unique technical challenges in the rapidly evolving AI Security space.  
  • Impactful Collaboration: Partner with cross-functional teams to create features that solve meaningful customer problems.  
  • Growth Opportunities: Advance your skills and career while contributing directly to world-first AI security innovations.  
  • Supportive Work Culture: We foster a collaborative team where diverse perspectives and continuous improvement drive our success. 

What Success Looks Like 

As a Backend Software Engineer at F5, success is demonstrated by your ability to:  

  • Deliver high-quality, scalable backend services that enhance the capabilities of our AI Security products.  
  • Collaborate seamlessly with cross-functional teams to align engineering solutions with product goals.  
  • Maintain a growth mindset, adopting modern technologies and improving backend architecture to meet current and future needs.  
  • Troubleshoot and resolve complex production issues, minimizing downtime and ensuring system reliability. 
#LI-SS5

The Job Description is intended to be a general representation of the responsibilities and requirements of the job. However, the description may not be all-inclusive, and responsibilities and requirements are subject to change.

Please note that F5 only contacts candidates through F5 email address (ending with @f5.com) or auto email notification from Workday (ending with f5.com or @myworkday.com).

Equal Employment Opportunity

It is the policy of F5 to provide equal employment opportunities to all employees and employment applicants without regard to unlawful considerations of race, religion, color, national origin, sex, sexual orientation, gender identity or expression, age, sensory, physical, or mental disability, marital status, veteran or military status, genetic information, or any other classification protected by applicable local, state, or federal laws. This policy applies to all aspects of employment, including, but not limited to, hiring, job assignment, compensation, promotion, benefits, training, discipline, and termination.  F5 offers a variety of reasonable accommodations for candidates. Requesting an accommodation is completely voluntary. F5 will assess the need for accommodations in the application process separately from those that may be needed to perform the job. Request by contacting [email protected].

Skills Required

  • At least 5 years of experience developing server-side applications using Python, FastAPI, or equivalent frameworks
  • Strong understanding of database technologies such as PostgreSQL or MySQL
  • Experience building, debugging, and maintaining RESTful APIs and multi-service backend systems
  • Excellent troubleshooting skills for analyzing complex software systems
  • Ability to deliver high-quality backend solutions meeting business and customer needs
  • Familiarity with Dockerized applications, Kubernetes, and AWS or other cloud environments
  • Hands-on experience with automated CI/CD workflows, such as ArgoCD
  • Knowledge of secure coding practices and mission-critical production deployments

F5 Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about F5 and has not been reviewed or approved by F5.

  • Equity Value & Accessibility Equity grants and an employee stock purchase plan are positioned as meaningful parts of total compensation, with RSUs and a discount ESPP commonly included. Pay packages for many technical roles are considered competitive when equity is taken into account.
  • Leave & Time Off Breadth Paid vacation that increases with tenure, sick time, paid holidays, and paid family leave are prominently featured. Additional programs like volunteer time and periodic wellness long weekends are highlighted as part of the time-off ecosystem.
  • Inclusive Benefits Coverage Health plans include travel support for specific care (such as reproductive and gender‑affirming services) and mental health resources, alongside comprehensive medical, dental, and vision coverage. These elements are presented as part of a broad, inclusive approach to healthcare.

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The Company
HQ: Seattle, WA
5,847 Employees

What We Do

F5 application services ensure that applications are always secure and perform the way they should—in any environment and on any device. F5 (NASDAQ: FFIV) powers applications from development through their entire life cycle, across any multi-cloud environment, so our customers – enterprise businesses, service providers, governments, and consumer brands—can deliver differentiated, high-performing, and secure digital experiences.

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