Sr Full Stack Engineer

F5; Dublin; On-site; EUR 70,000 - 100,000; Full time

Job summary

F5 is expanding its AI Security team and seeks a backend software engineer to design, develop, test, and maintain scalable backend solutions powering world-first AI Security technologies.

You will collaborate with product, QA, frontend, and data science teams to deliver high-performance software, writing clean, secure code and contributing to resilient backend architecture. A dynamic, growth-oriented culture awaits in Dublin and beyond.

Qualifications

• At least 5 years’ experience developing server-side applications using Python, FastAPI, or equivalent frameworks.
• Strong understanding of database technology, including 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.

Responsibilities

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

Skills

Python

FastAPI

REST APIs

Backend development

Team collaboration

Tools

PostgreSQL

MySQL

Docker

Kubernetes

AWS

GitLab

ArgoCD

Job description

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, andmaintainscalable backend applications that power world-first AI Security solutions. Your contributions will be crucial tobuilding outour AI Security web application , ensuring robust, reliable, andcutting-edgetechnology 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 (Dockerizedapplications, Helm charts, Kubernetes)

Key Responsibilities Build and Deliver Exceptional Technology

• Design, develop, andmaintain scalable backend applications , SDKs, and tools to support AI Securitysolutions atscale.

• 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, andoptimizebackend services to ensuremaximumscalability, 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 challengesencounteredduring development cycles.

• Thrive in a collaborative environment , working cross-functionally to ensure alignment with business and technical goals.

• Stay updated with emergingtechnologies ,leveragingnew tools and features whereappropriate 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.

• Demonstratedexpertisein building, debugging, andmaintainingRESTful 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 Dockerizedapplications , Kubernetes, and cloud environments like AWS.

• Hands-on experience with testing anddeliverypipelines, 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’swhyyou’lllove 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 isdemonstratedby your ability to:

• Deliverhigh-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 moderntechnologiesand 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 [e-mail].