Attack Readiness

The best time to fix a vulnerability
is before it is written.

Hands-on security training for development teams. Real vulnerabilities, real labs, real code in your technology stack. Security thinking from the first line of code.

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What is secure development training?

You know your developers write the code that becomes your attack surface. You have recurring vulnerability categories from pentests. You get a training programme that equips your team to recognise and prevent those vulnerabilities from the start. Secure development training is tailored to your stack, your team's experience level, and the specific challenges you face. Hands-on labs are at the core: developers find and fix vulnerabilities in realistic codebases.

About this service

Secure Development Training: security by design, not afterthought

Most vulnerabilities originate during development. Secure development training equips your development team with the knowledge and skills to write secure code from the start. Not as a theoretical compliance exercise, but as practical training with real code and real vulnerabilities.

The training is customised based on your technology stack, the team's experience level, and the challenges your team faces. Using Java? You get Java-specific vulnerabilities and best practices. Working with APIs? Then API security is central. Examples come from the real world, not a textbook.

Hands-on labs are the heart of the training. Participants find and fix vulnerabilities in realistic codebases. They learn not just what can go wrong but why, and how to do it securely. Experienced pentesters deliver the training and share insights from real attacks. The goal is not just knowledge transfer but behaviour change: after the training your team thinks about security with every line of code.

Why this matters

Three reasons to train developers rather than just test code

Finding vulnerabilities after deployment costs 10 times more

The cost of fixing a vulnerability in production is dramatically higher than catching it during development. Training shifts the fix left to where it is cheapest and fastest to resolve.
Recurring vulnerability categories mean untrained developers

If the same SQL injection, XSS, or broken auth patterns appear in every pentest, the problem is not missing tools. It is that developers have not learned to prevent these vulnerabilities from the start.
Generic training does not change behaviour

Online compliance courses that developers forget within a week do not reduce vulnerabilities. Hands-on training with real code in your actual technology stack builds lasting security instincts.

What gets covered

Topics covered in secure development training

OWASP Top 10 vulnerabilities: recognition, prevention, and secure alternatives

Secure coding practices per technology stack

Input validation and output encoding

Authentication and session management best practices

Cryptography: secure use of libraries, common mistakes

API security: authentication, authorisation, rate limiting, input validation

Secure SDLC: where security fits in the development process

Dependency management and supply chain security

Hands-on labs with realistic vulnerabilities

Methodology

How DEFION delivers secure development training

Intake

Inventory of technology stack, experience level, previous incidents, and learning objectives.

Custom training design

Composing modules, labs, and examples tailored to your team and their daily technology.

Theory sessions

Interactive knowledge sessions with examples from pentesting practice and real attack scenarios.

Hands-on labs

Participants identify and fix vulnerabilities in realistic codebases using real attacker tools.

Closing and follow-up

Summary, reference materials, and advice for integrating security into the development process.

Optional follow-up (3 months)

Follow-up session to reinforce learning and address new questions that emerged during daily work.

What you receive

Deliverables

Custom training tailored to your technology stack and level
Hands-on labs and exercise materials
Reference materials and secure coding guidelines
Certificate of participation
Optional: follow-up session after 3 months

Target audience

Who is secure development training for?

Secure development training is for any organisation that wants to address security at the source rather than discovering vulnerabilities in production through pentests or incidents.

Development teams that want to structurally integrate security into their workflow
Organisations implementing a Secure SDLC
Teams that want to address recurring vulnerability categories found in pentests
Companies that need to demonstrate compliance requirements around secure development

Frequently asked questions

FAQ

How long does the training take?

Standard 1 to 2 days. For extended programmes (multiple technologies, in-depth modules) the training can be expanded to 3 days. The intake determines the optimal duration.

Can the training be delivered remotely?

Yes. Training is offered both on-site and remotely. Remote sessions use interactive lab environments that participants access through the browser.

For which programming languages is the training available?

Java, C#/.NET, Python, JavaScript/TypeScript, Go, PHP, and more. Training is tailored to the languages your team uses daily.

Is this a one-time training or an ongoing programme?

Both are possible. A one-time training builds a strong foundation. An ongoing programme with periodic sessions and new labs keeps the team sharp and covers new threats.

How do we measure whether the training has an effect?

By comparing pentest findings before and after the training. Many organisations see a significant reduction in certain vulnerability categories. Optionally, a pre- and post-assessment can be conducted.

Code Security Review

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Web Application Pentest

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Mobile App Security Assessment

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