Frontend Developer - Asp.net

N Consulting Limited; London; Remote; GBP 50,000 - 75,000; Full time

Job summary

A leading consulting firm seeks an experienced Front-End Developer skilled in ASP.NET and network security. This role involves developing web applications while integrating firewall policies, ensuring security protocols are adhered to. Ideal candidates will have strong front-end skills and 5+ years of experience, with an emphasis on collaboration with security teams.

Qualifications

• 5+ years of experience in ASP.NET (C#) web development.
• Strong front-end skills with HTML5, CSS3, and JavaScript frameworks.
• Good understanding of network security principles and firewall rules.

Responsibilities

• Develop and maintain web applications using ASP.NET and modern front-end technologies.
• Collaborate with security teams to integrate firewall policies into applications.
• Assist in designing and validating firewall rules and access controls.

Skills

ASP.NET (C#)

HTML5

CSS3

JavaScript

Network Security Principles

Tools

Palo Alto Networks

Cisco ASA

Fortinet

Job description

Role: Front-End Developer (ASP/.NET) with Firewall Experience

Location: London, Remote

Job Description:

We are looking for a skilled ASP.NET/Front-End Developer with a strong foundation in network security and firewall configuration. The ideal candidate will have hands-on experience with ASP.NET technologies and front-end development, coupled with working knowledge of firewall rules, access controls, and network policies. Experience with Palo Alto Networks is a strong advantage.

Key Responsibilities:

• Develop and maintain web applications using ASP.NET (C#) and modern front-end technologies (e.g., HTML, CSS, JavaScript, React/Angular).
• Collaborate with security and network teams to integrate firewall policies and security protocols into applications.
• Assist in the design and validation of firewall rules and ACLs, ensuring secure access to application modules.
• Translate security and compliance requirements into front-end behavior and access control logic.
• Troubleshoot issues related to application-layer firewall conflicts and rule enforcement.
• Work closely with DevOps/network teams on deployment, access, and secure routing.
• Participate in code reviews, architecture discussions, and Agile ceremonies.

Required Skills & Experience:

• 5+ years of experience in ASP.NET (C#) web development.
• Strong front-end skills with HTML5, CSS3, JavaScript, and any modern framework (React, Angular, or Vue.js).
• Good understanding of network security principles, firewall rules, ports, protocols, and access control.
• Exposure to firewall management tools (e.g., Palo Alto, Cisco ASA, Fortinet).
• Ability to read and apply basic firewall configurations to development workflows.
• Experience working with DevOps/SRE teams and understanding deployment pipelines.