Network Security Software Engineer Intern (Security Engineering) - 2027 Fall

ByteDance; San Jose (CA); On-site; USD 62,000 - 83,000; Full time

Benefits offered by this job

Health insurance

Life insurance

Wellbeing benefits

Paid holidays

Housing allowance

Job summary

ByteDance is seeking interns to design and develop enterprise-grade network security products for hyperscale environments, under guidance from senior engineers. You will help build AI-native security capabilities and assist in delivering secure solutions across ByteDance’s business units.

Applicants should be pursuing degrees in CS, Cybersecurity, or Networking, with strong knowledge of networks, data structures, and programming in C/Go/Python.

Qualifications

• Pursuing Undergraduate/Master’s/PhD in CS, Cybersecurity, Networking or related field.
• Strong foundation in data structures, algorithms, networks, and OS.
• Proficiency in C, Go, or Python.
• Exposure to LLM/Agent-based systems.
• Self-driven with strong communication and collaboration skills.

Responsibilities

• Participate in design and development of network security products for hyperscale environments under senior guidance.
• Assist in building security capabilities for AI-native systems (LLM/Agent abuse prevention, risk detection, behavior analysis).
• Support delivering customized security solutions meeting compliance and security requirements.
• Take ownership of modules or features, participate in code reviews, contribute to documentation and testing.

Skills

C

Go

Python

Data structures

Algorithms

Computer networks

Operating systems

Communication

Education

Undergraduate/Master’s/PhD in CS/Cybersecurity/Networking

Tools

LLM exposure

Job description

Responsibilities

The Network Security team builds enterprise-grade network security products and solutions that protect online businesses from cyberattacks and disruption. We're a group of engineers who like challenging the status quo and solving real-world security problems effectively and efficiently. We set ambitious goals, value teamwork, and favor open, direct communication. If that resonates with you, come make an impact with us as an intern and grow alongside a team shipping production security systems at scale.

We are looking for talented individuals to join us for an internship. Our internship program offers students hands‑on experience, industry exposure, and opportunities to apply their knowledge to real‑world challenges while building a strong foundation for personal and professional growth. Interns will gain practical experience, explore potential career paths, and participate in social events, learning programs, and development workshops alongside industry professionals. Candidates may apply to a maximum of two positions across Our Company and its affiliates globally. Applications will be considered in the order they are submitted. Applications are reviewed on a rolling basis, so we encourage you to apply early. Please clearly state your availability in your resume, including your start and end dates. Online Assessment: Candidates who pass resume screening will be invited to participate in Our Company's technical online assessment.

Responsibilities

• Participate in the design and development of network security products for hyperscale environments, including firewalls, WAF, IDS, and similar systems, under the guidance of senior engineers
• Assist in building security capabilities for AI-native systems, including LLM/Agent abuse prevention, risk detection, and behavioral analysis
• Support the team in delivering customized security solutions for ByteDance's business units that meet compliance and security requirements
• Take ownership of well-scoped modules or features, participate in code reviews, and contribute to team documentation and testing

Qualifications

Minimum Qualifications

• Currently pursuing a Undergraduate/ Master's/Phd's in Computer Science, Cybersecurity, Networking or a related discipline.
• Solid foundation in data structures, algorithms, computer networks, and operating systems
• Proficiency in at least one of C, Go, or Python, demonstrated through coursework, personal projects, research, or prior internships
• Exposure to or coursework/project experience with LLM/Agent-based systems (e.g., tool/function calling, context management, or related security implementations)
• Self-driven problem solver with strong communication and collaboration skills, comfortable working in fast-paced, ambiguous environments

Preferred Qualifications

• Personal projects, research, CTF experience, or coursework related to LLM/AI security (e.g., prompt injection defense, abuse prevention, content safety, model risk control)
• Familiarity with firewall, WAF, or IDS products, or networking/security-related open-source contributions
• Prior internship experience in security, networking, or backend infrastructure

Job Information

【For Pay Transparency】Compensation Description (Hourly) - Campus Intern

The hourly rate range for this position in the selected city is $45- $60.

Benefits may vary depending on the nature of employment and the country work location. Interns have day one access to health insurance, life insurance, wellbeing benefits and more. Interns also receive 10 paid holidays per year and paid sick time (56 hours if hired in first half of year, 40 if hired in second half of year). Interns who are not working 100% remote may also be eligible for housing allowance.

The Company reserves the right to modify or change these benefits programs at any time, with or without notice.

For Los Angeles County (unincorporated) Candidates

Qualified applicants with arrest or conviction records will be considered for employment in accordance with all federal, state, and local laws including the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act. Our company believes that criminal history may have a direct, adverse and negative relationship on the following job duties, potentially resulting in the withdrawal of the conditional offer of employment:

• Interacting and occasionally having unsupervised contact with internal/external clients and/or colleagues;
• Appropriately handling and managing confidential information including proprietary and trade secret information and access to information technology systems; and
• Exercising sound judgment.

About Us

Founded in 2012, ByteDance's mission is to inspire creativity and enrich life. With a suite of more than a dozen products, including TikTok, Lemon8, CapCut and Pico as well as platforms specific to the China market, including Toutiao, Douyin, and Xigua, ByteDance has made it easier and more fun for people to connect with, consume, and create content.

Why Join ByteDance

Inspiring creativity is at the core of ByteDance's mission. Our innovative products are built to help people authentically express themselves, discover and connect – and our global, diverse teams make that possible. Together, we create value for our communities, inspire creativity and enrich life - a mission we work towards every day.

As ByteDancers, we strive to do great things with great people. We lead with curiosity, humility, and a desire to make impact in a rapidly growing tech company. By constantly iterating and fostering an "Always Day 1" mindset, we achieve meaningful breakthroughs for ourselves, our Company, and our users. When we create and grow together, the possibilities are limitless. Join us.

Diversity & Inclusion

ByteDance is committed to creating an inclusive space where employees are valued for their skills, experiences, and unique perspectives. Our platform connects people from across the globe and so does our workplace. At ByteDance, our mission is to inspire creativity and enrich life. To achieve that goal, we are committed to celebrating our diverse voices and to creating an environment that reflects the many communities we reach. We are passionate about this and hope you are too.

Reasonable Accommodation

ByteDance is committed to providing reasonable accommodations in our recruitment processes for candidates with disabilities, pregnancy, sincerely held religious beliefs or other reasons protected by applicable laws. If you need assistance or a reasonable accommodation, please reach out to us at https://tinyurl.com/RA-request