Discipline one
Software engineering
We build the product.
- Architecture that stays easy to extend
- Tested, documented code with a clean handover
- Cloud-native delivery with automated pipelines
Software engineering Cyber engineering
Software that ships.
Security that holds.
Johnson Software designs, builds, and defends the systems your business runs on. One engineering team, from the first commit to the final threat model.
- Threat modeling
- Secure code review
- Cloud & DevOps
- Penetration testing
- Compliance prep
- Custom software
Why one team
Builders who know exactly how systems get broken.
Most companies hire one firm to build and another to test, and the two never share notes until something fails. We do both, so the people writing your architecture have already thought like the people attacking it.
Discipline two
Cyber engineering
We make it hold.
- Threat models drawn before the first line of code
- Hands-on assessments with a retest of every fix
- Controls mapped to the frameworks your auditors use
What we do
Six services across build and defend.
Security you can act on
Findings your developers can fix on Monday.
Every assessment ends with a written report. Each finding carries a severity score, the exact request or code path involved, and a specific fix. We retest the fixes and record the result, so you hold evidence for customers and auditors, not just a list of worries.
- CVSS 3.1 scoring with the full vector
- Mapped to OWASP and MITRE ATT&CK
- Retest results recorded in the final report
Sample finding · illustrative
Finding F-014High · 8.1
Any signed-in user can read another customer's invoices
- Category
- OWASP API1:2023 Broken Object Level Authorization
- Affected
- GET /api/invoices/{id}
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Evidence
- Changing the invoice ID returned records owned by a different account.
Fix. Check object ownership on the server for every lookup, and add a regression test that requests another account's ID.
Retested after remediationClosed
How we work
Five steps, with security in every one.
- STEP 1
Discover
We map your goals, users, data, and constraints, and agree what done means.
- STEP 2
Design
Architecture and a threat model, reviewed together before build starts.
- STEP 3
Build
Small, tested releases with code review and automated security checks.
- STEP 4
Harden
Independent testing of the build, then fixes and a retest.
- STEP 5
Operate
Monitoring, handover, and support so it stays healthy after launch.
Tell us what you're building, or what you need protected.
What we do
Build it right. Test it hard. Keep it safe.
Six services, grouped by discipline. Open any one to see what you get, the tools and frameworks we work with, and a typical price range.
Not sure which service fits? Start with an estimate.
Pricing & estimates
Know the range before the first call.
Clear starting points, an estimator you can use in a minute, and three ways to engage. Every figure is an indicative range. A fixed quote follows a short discovery conversation.
Starting points
Three ways most clients begin.
Project estimator
Shape the project. Watch the range move.
Pick a service, a size, and any extras. The range updates as you go.
Engagement models
Pick the contract that fits how you work.
Questions
Before you ask.
How accurate are these estimates?
They are planning ranges based on typical projects. After a short discovery call we confirm scope in writing and give you a fixed price or a capped budget.
Do you sign an NDA before we talk details?
Yes. Send us a mutual NDA, or we will provide one, before you share anything sensitive.
What do I receive after a security assessment?
A written report with an executive summary, every finding scored and explained, step-by-step fixes, and a retest of the items you remediate.
Do you test systems without permission?
Never. Every security test starts with a signed scope and written authorization that names the systems, dates, and rules of engagement.
Who owns the code?
You do. Custom software, documentation, and infrastructure code are handed over to you at the end of the project.
Ready for a fixed quote?
About
A software engineer who also thinks like an attacker.
Meet the CEO
Founder & CEO
I'm a software engineer and a cyber engineer. I started Johnson Software because those two jobs are usually done by two separate teams who don't talk until something breaks.
Building and breaking are the same skill pointed in opposite directions. When I design a system, I already know which door an attacker will try first. When I test someone else's system, I know the pressure the developers were under to ship it. That overlap is the whole company.
I stay hands-on. I still write code, review architecture, and run assessments, because the best way to keep a standard high is to meet it myself. Clients get a direct line to the person who is accountable for the work.
Johnson Software exists for businesses that want software that works on day one and still works after someone hostile has looked at it.
Principle 1
Threat-model before you build
An hour on a whiteboard can remove a month of rework.
Principle 2
Ship small, ship tested
Frequent releases with automated checks beat big-bang launches.
Principle 3
Write findings people can use
A report is only good if a developer can act on it today.
Principle 4
Say what we don't know
Clear limits and honest risk beat confident guesses.
Where the work happens
Two sides of the same craft.
Build
Defend
Want the engineer who answers for the work?
Contact
Tell us what you're working on.
A few sentences is enough. We read every brief and come back with a plan and a price.
What happens next
- You send a brief
What you need, what it connects to, and when you need it.
- We review scope and risk
We look at the technical and security sides together.
- You get a plain-language plan
Deliverables, timeline, and a fixed price or capped budget.
Security testing only starts after a signed scope and written authorization.
Your brief is ready
Copy it and send it to Johnson Software to start discovery.