Developing Secure Software (LFD121) Intermediate
The Developing Secure Software (LFD121) course by Linux Foundation equips software developers, DevOps engineers, and web application developers with practical skills to build systems resistant to attacks, addressing the critical industry gap where 91% of organizations experienced open source security incidents in the past year. It teaches secure design principles, input validation, supply chain security, and threat modeling to reduce vulnerabilities in both open and closed source software.
This course prepares learners for the OpenSSF’s Secure Software Development Fundamentals certification, with Koenig providing official vendor-authorized courseware and 30-day lab access. Gain the expertise to rapidly detect, respond to, and remediate security flaws, advancing your role in high-demand secure development environments.
Training Formats & Pricing
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Course Overview
The Linux Foundation's Developing Secure Software (LFD121) course equips software developers, DevOps professionals, and web application developers with foundational skills to build resilient applications in an era of escalating cyber threats. Developed by the Open Source Security Foundation (OpenSSF), this course prepares learners for secure development practices applicable to both open and closed source environments, aligning with industry demand as 90% of modern applications rely on open source components. Targeted at developers, security engineers, and software architects, it covers essential topics such as risk management, secure design principles like least privilege, and supply chain evaluation techniques to safely reuse third-party software. With cyberattacks increasing year over year, organizations across finance, healthcare, and technology sectors are prioritizing secure coding, making these skills critical for modern software teams.
Students engage with key technologies including static application security testing (SAST) tools, software composition analysis (SCA) platforms, fuzzers, and web application scanners, all integrated into real-world workflows. The course includes hands-on labs where learners implement input validation using allowlists, securely process data, handle errors, and apply cryptographic controls within simulated development environments. A core component involves building a threat model using the STRIDE framework to identify potential vulnerabilities in software design. These practical exercises are conducted through browser-based lab environments that mirror continuous integration pipelines, enabling students to verify security early in development. One capstone scenario guides participants through securing a sample application by identifying injection risks, validating dependencies, and configuring automated security checks.
Completing Developing Secure Software (LFD121) prepares individuals for the LFD121: Developing Secure Software certification, recognized by leading tech employers and validating expertise in secure coding fundamentals. According to industry reports, developers with security certifications earn up to 25% more than their non-certified peers, with median salaries exceeding $110,000 in North America. Koenig Solutions enhances this learning path with official Linux Foundation courseware, 1-on-1 instructor support, and Guaranteed-to-Run batches, ensuring flexible and reliable access to training. Graduates gain the ability to reduce attack surfaces, respond faster to vulnerabilities, and contribute to more secure software delivery—positioning them for advancement into senior developer, application security engineer, or DevSecOps roles.
What You'll Learn
Skills You'll Gain
Prerequisites
- At least 2 years of general software development experience, essential for mastering developing secure software with Linux Foundation's LFD121 course
- Proficiency in one or more programming languages such as Python, Java, or C++, which is crucial for implementing secure coding practices
- Basic understanding of software architecture principles to design resilient applications
- Familiarity with secure coding concepts to prevent vulnerabilities in software products
- Knowledge of risk management and threat modeling fundamentals to identify and mitigate security risks
- Experience with open source software (OSS) development, which enhances collaboration skills and understanding of secure OSS practices
Certification Exam
Everything you need to know about the LFD121 certification exam
What's Included in Your Training
Every enrollment comes packed with resources to maximise your learning and exam success
Exam Preparation Materials
Practice Test Questions (200+)
Certificate of Completion
Post-Training Support (30 days)
Session Recording Access
Free Rescheduling (7+ days notice)
Career Outcomes
of LFD121 certified professionals report career advancement within 6 months
Salary Impact
Average salary increase reported after obtaining the LFD121 certification
*Source: Glassdoor / LinkedIn 2025
Job Roles
- Secure Software Developer
- Application Security Engineer
- DevSecOps Engineer
- Software Supply Chain Security Analyst
- Security-Focused Software Engineer
- Threat Modeling Specialist
Companies Hiring
and 5,000+ organizations worldwide seeking LFD121 certified professionals
Course Student Reviews
Real results from IT professionals who trained with Koenig — rated 4.9/5 from 18,400+ verified reviews.
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★★★★★
“Passed AZ-104 on first attempt. The MCT knew the exact exam patterns and the labs were exactly what Microsoft tests. Worth every penny.”
AZ-104 Certified ✓ Verified -
★★★★★
“I trained 15 of my team members for SC-200. Koenig's on-site delivery was seamless and all 15 passed within 3 months.”
Enterprise Client ✓ Verified -
★★★★★
“The 1-on-1 format was a game changer. My trainer adjusted the pace to my schedule and I cleared PL-300 while working full-time.”
PL-300 Certified ✓ Verified -
★★★★★
“From AZ-900 to AZ-305 in 6 months. Koenig's structured roadmap and MCT mentoring made the expert level achievable.”
AZ-305 Expert ✓ Verified -
★★★★★
“As an L&D head I've used 5 training vendors. Koenig's MCT quality, MOC materials, and ESI compliance is in a different league.”
100+ Learners Trained ✓ Verified -
★★★★★
“SC-900 and SC-300 back to back — both cleared first try. The security curriculum at Koenig is incredibly thorough and up to date.”
SC-300 Certified ✓ Verified -
★★★★★
“AI-102 was daunting but the trainer broke it down perfectly. Real Azure OpenAI labs made the difference. Highly recommend.”
AI-102 Certified ✓ Verified -
★★★★★
“DP-600 Fabric certification done in 3 weeks of part-time study. The customised schedule around my timezone was a lifesaver.”
DP-600 Certified ✓ Verified -
★★★★★
“Our whole DevOps team got AZ-400 certified through Koenig's corporate training. Smooth logistics and top-tier MCTs throughout.”
AZ-400 Team Training ✓ Verified -
★★★★★
“Passed AZ-104 on first attempt. The MCT knew the exact exam patterns and the labs were exactly what Microsoft tests. Worth every penny.”
AZ-104 Certified ✓ Verified -
★★★★★
“I trained 15 of my team members for SC-200. Koenig's on-site delivery was seamless and all 15 passed within 3 months.”
Enterprise Client ✓ Verified -
★★★★★
“The 1-on-1 format was a game changer. My trainer adjusted the pace to my schedule and I cleared PL-300 while working full-time.”
PL-300 Certified ✓ Verified -
★★★★★
“From AZ-900 to AZ-305 in 6 months. Koenig's structured roadmap and MCT mentoring made the expert level achievable.”
AZ-305 Expert ✓ Verified -
★★★★★
“As an L&D head I've used 5 training vendors. Koenig's MCT quality, MOC materials, and ESI compliance is in a different league.”
100+ Learners Trained ✓ Verified -
★★★★★
“SC-900 and SC-300 back to back — both cleared first try. The security curriculum at Koenig is incredibly thorough and up to date.”
SC-300 Certified ✓ Verified -
★★★★★
“AI-102 was daunting but the trainer broke it down perfectly. Real Azure OpenAI labs made the difference. Highly recommend.”
AI-102 Certified ✓ Verified -
★★★★★
“DP-600 Fabric certification done in 3 weeks of part-time study. The customised schedule around my timezone was a lifesaver.”
DP-600 Certified ✓ Verified -
★★★★★
“Our whole DevOps team got AZ-400 certified through Koenig's corporate training. Smooth logistics and top-tier MCTs throughout.”
AZ-400 Team Training ✓ Verified
-
★★★★★
“Passed AZ-104 on first attempt. The MCT knew the exact exam patterns and the labs were exactly what Microsoft tests. Worth every penny.”
AZ-104 Certified ✓ Verified -
★★★★★
“I trained 15 of my team members for SC-200. Koenig's on-site delivery was seamless and all 15 passed within 3 months.”
Enterprise Client ✓ Verified -
★★★★★
“The 1-on-1 format was a game changer. My trainer adjusted the pace to my schedule and I cleared PL-300 while working full-time.”
PL-300 Certified ✓ Verified -
★★★★★
“Passed AZ-104 on first attempt. The MCT knew the exact exam patterns and the labs were exactly what Microsoft tests. Worth every penny.”
AZ-104 Certified ✓ Verified -
★★★★★
“I trained 15 of my team members for SC-200. Koenig's on-site delivery was seamless and all 15 passed within 3 months.”
Enterprise Client ✓ Verified -
★★★★★
“The 1-on-1 format was a game changer. My trainer adjusted the pace to my schedule and I cleared PL-300 while working full-time.”
PL-300 Certified ✓ Verified
-
★★★★★
“From AZ-900 to AZ-305 in 6 months. Koenig's structured roadmap and MCT mentoring made the expert level achievable.”
AZ-305 Expert ✓ Verified -
★★★★★
“As an L&D head I've used 5 training vendors. Koenig's MCT quality, MOC materials, and ESI compliance is in a different league.”
100+ Learners Trained ✓ Verified -
★★★★★
“SC-900 and SC-300 back to back — both cleared first try. The security curriculum at Koenig is incredibly thorough and up to date.”
SC-300 Certified ✓ Verified -
★★★★★
“From AZ-900 to AZ-305 in 6 months. Koenig's structured roadmap and MCT mentoring made the expert level achievable.”
AZ-305 Expert ✓ Verified -
★★★★★
“As an L&D head I've used 5 training vendors. Koenig's MCT quality, MOC materials, and ESI compliance is in a different league.”
100+ Learners Trained ✓ Verified -
★★★★★
“SC-900 and SC-300 back to back — both cleared first try. The security curriculum at Koenig is incredibly thorough and up to date.”
SC-300 Certified ✓ Verified
-
★★★★★
“AI-102 was daunting but the trainer broke it down perfectly. Real Azure OpenAI labs made the difference. Highly recommend.”
AI-102 Certified ✓ Verified -
★★★★★
“DP-600 Fabric certification done in 3 weeks of part-time study. The customised schedule around my timezone was a lifesaver.”
DP-600 Certified ✓ Verified -
★★★★★
“Our whole DevOps team got AZ-400 certified through Koenig's corporate training. Smooth logistics and top-tier MCTs throughout.”
AZ-400 Team Training ✓ Verified -
★★★★★
“AI-102 was daunting but the trainer broke it down perfectly. Real Azure OpenAI labs made the difference. Highly recommend.”
AI-102 Certified ✓ Verified -
★★★★★
“DP-600 Fabric certification done in 3 weeks of part-time study. The customised schedule around my timezone was a lifesaver.”
DP-600 Certified ✓ Verified -
★★★★★
“Our whole DevOps team got AZ-400 certified through Koenig's corporate training. Smooth logistics and top-tier MCTs throughout.”
AZ-400 Team Training ✓ Verified
Frequently Asked Questions
Everything you need to know about the LFD121 training course
Is the certification exam included in the Developing Secure Software (LFD121) course, and what is the exam fee if separate?
What training formats does Koenig offer for Developing Secure Software (LFD121), and is Guaranteed-to-Run scheduling available?
How long is lab access provided, and what environment is used for Developing Secure Software (LFD121) labs?
What is Koenig's rescheduling and cancellation policy for the Developing Secure Software (LFD121) course?
What is the exam format, number of questions, passing score, and time limit for Developing Secure Software (LFD121)?
How long is the Developing Secure Software (LFD121) certification valid, and what is the renewal process and cost?
What post-training support does Koenig provide after completing the Developing Secure Software (LFD121) course?
What are the prerequisites or prior experience needed for the Developing Secure Software (LFD121) course?
How does completing Developing Secure Software (LFD121) impact career growth and salary potential?
How does instructor-led training for Developing Secure Software (LFD121) at Koenig compare to self-study in terms of outcomes?
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