Web Security Assessment
Find and validate vulnerabilities across web applications and APIs, with clear evidence and remediation guidance.
Know What You're Running.
Whether it's an application, a server, or a dataset, we help you understand what you have, find what needs attention, and decide what to do next.
Web Security·Linux Sysadmin·Data Analysis
Technology Problems Rarely Happen at the Right Time.
You are focused on shipping product and growing the business. We help with the technical gaps that are easy to postpone.
“Is our application actually secure?”
Automated checks are useful, but they do not cover every authorization, authentication, API, or business-logic path.
“Who will take care of our server?”
We help keep Linux infrastructure maintained, hardened, monitored, backed up, and easier to operate.
“We have data. Now what?”
We turn raw spreadsheets, transactions, logs, and operational data into useful analysis, dashboards, and decisions.
One technical team across security,
infrastructure, and data.Talk to our engineers →
Three disciplines. Built for practical work.
Choose the problem first. We will help define the right scope instead of forcing a package that you do not need.
Linux System Administration
Provisioning, hardening, maintenance, monitoring, backup, troubleshooting, and server operations.
Data Analysis
Clean data, build dashboards, analyze performance, and turn raw business data into useful insights.
Scan Fast. Test Deep.
GoPentest is our dedicated security testing platform. Use it for quick automated visibility, then move to human-led testing when deeper validation is needed.
Start Small. Go Deeper When Needed.
Not every application needs a full penetration test on day one.
STEP 01
GoPentest Scan
Fast automated visibility into public exposure.
STEP 02
Manual Assessment
Targeted human-led testing within agreed scope.
STEP 03
Deeper Testing
Broader application, API, role, or business-logic testing when needed.
STEP 04
Report
Evidence, impact, severity, and remediation guidance.
STEP 05
Remediate & Retest
Support fixes and verify them within scope.
STEP 06
Ongoing Support
Periodic reviews or infrastructure support where appropriate.
Who We Work With
Our strongest fit is with teams that have real systems but do not want to build every technical specialty in-house.
Software Houses
External security testing for client applications before handover or release.
Startups
Practical security and infrastructure support without building a specialist team from day one.
SMEs
Security checks, Linux operations, and data support for growing digital businesses.
Developers
An independent second opinion on application security, architecture, and deployment.
A straightforward process, in order.
From first conversation to validated remediation, the scope stays visible.
01 // DISCOVER
Understand the environment, objectives, and business concerns.
02 // SCOPE
Define targets, access, rules of engagement, and deliverables.
03 // ASSESS
Run controlled testing using appropriate automated and manual techniques.
04 // REPORT
Document evidence, impact, and prioritized remediation guidance.
05 // REMEDIATE
Clarify findings and help your team understand the recommended changes.
06 // RETEST
Verify fixes within the agreed engagement scope.
We Don't Just Talk About Security.
Research, vulnerability mechanics, systems guides, and articles published by the XANTUS technical team.
Vulnerability Scanner vs Pentest: What's the Difference?
A practical explanation of where automated scanning ends and manual validation begins.
5 Common Security Mistakes in Modern Web Apps
Real-world patterns worth reviewing across modern web applications and APIs.
How to Harden a Fresh Ubuntu VPS
A practical baseline for SSH, firewalling, updates, users, and basic server hygiene.
Already have a website?
Use GoPentest for a quick automated check, then contact us when you need the results validated or investigated more deeply.
A small team that works close to the system.
We are deliberately direct: clear scope, hands-on execution, practical reporting, and honest boundaries around what we can and cannot deliver internally.
Security testing, server work, and data analysis are handled by the same technical team behind XANTUS and GoPentest.
When a project requires specialized expertise beyond our current core capability, we can collaborate with vetted specialists rather than pretending every problem fits the same skill set.
Meet Our Technical Team
Hands-on practitioners working directly with your systems.
Anggi Prayitno
Security and penetration testing with a focus on vulnerability assessment, Web and API security.
Nur Muhammad Wafa
Web Application Security, vulnerability assessment, Penetration Testing, and Linux system administration.
Sigit Dwiantoro
Data analysis, Business Intelligence, Python/SQL workflows, and operational analytics.
Frequently Asked Questions
Common questions before an engagement.
No. We work with startups, software houses, developers, SMEs, and growing
businesses. Scope is adjusted to the actual need.
No. It provides fast automated visibility. A deeper assessment involves human-led
testing within an agreed scope.
Not necessarily. Testing can be black-box, authenticated/grey-box, or code-assisted
depending on the objectives and scope.
Yes. Remediation guidance and retesting can be included according to the engagement
scope.
We state that transparently and can involve an appropriate specialist where needed,
with clear scope and confidentiality arrangements.
Let's Start With Your Actual Problem.
You do not need to know the exact service package. Tell us what you are running, what worries you, and what you are trying to achieve.