Full-Stack Developer (Mid/Senior) - Full-Time Position Lisboa

Full-Stack Developer (Mid/Senior) - Full-Time Position
Lisboa
Lisboa, Lisboa, Portugal

Do you believe code can change the world?

At Cyber
X – The Ethical Hacking Services, we’re building something that will. We’re looking for a
- stack developer (mid to senior level) who’s ready to create code that goes beyond the ordinary. This isn’t just another CRUD app. It’s a mission.

You won’t just be coding. You’ll be part of something bigger, a confidential mission with
- world impact.

What You'll Be Working With Here’s a sneak peek at the stack you’ll work with (and yes, these are mandatory ):

Type
Script (Next. js, Node. js) – Core frontend and backend language

Java
Script – Supporting internal tools and integrations

Python – Scripts, backend logic, and automation

Jupyter Notebooks and AI – Data manipulation, exploration and testing

Docker – Everything runs in containers

HTML/CSS – Your magic and design will be showcased here!

What We’re Looking For We’re not just hiring skills — we’re hiring mindset . The ideal candidate is:

Able to work under pressure and with tight deadlines

Comfortable in a
- paced, constantly evolving environment

Self-taught , curious , and truly passionate about tech

Open to modifications , feedback , and quick iterations

Communicative , patient, and able to contribute with ideas

Works well without supervision and takes full ownership

A real
- solver who thrives in ambiguity

A true nerd , proud of learning, experimenting, and improving

Someone
- minded ! No drama.

Tech Requirements 3+ years of experience as a
- stack developer

Strong knowledge of Type
Script , especially with Next. js or Node. js

Cloud implementation in AWS

Confident working with Python for backend services, microservices, and for AI integration.

Comfortable with REST APIs and modern frontend frameworks

Familiar with SQL/No
SQL databases

Version control with Git and Git
Hub

Knowledge of secure development principles

Advanced English

Portuguese documentation (NIF and NISS) - MANDATORY!

Bonus Points Open
AI, Claude, AI stuff, you know…

Experience in cybersecurity or
- conscious products

Past work in Saa
S startups

CI/CD, Dev
Ops, or serverless knowledge

Contributions to
- source or side projects

Knowledge of OSINT or ethical hacking (not required, but cool!)

What We Offer Full-time contract

Compensation package

100% remote — work from anywhere!

Flexible hours — results> hours

Birthday day off

Potential travel to meet international clients and events (yes, we go a lot in events!)

Cybersecurity/tech certifications to improve your skills

Opportunity to contribute to
- edge research

Other extras that we will discuss if you pass :D

Our Hiring Process Is Tough (And That’s a Good Thing) We don’t just want developers.

We want brilliant minds , people who think deeply, care about what they build, and constantly improve.

Here’s what to expect:

CV + Git
Hub/Portfolio Review – We look for quality, not just keywords. Show your best.

Initial Interview – Informal but technical. Be ready to talk about your projects and mindset.

Challenge Phase – A
- world mini project (with code review). Deadline-driven.

Final Interview – Discuss your solution, improvements, and vision.

Background check - We deal with a lot of confidential information. We need to check your information before making an offer.

Offer – If you made it here, welcome to the top 1%.

Only a few make it. But those who do, help shape the future.

About Cyber
X Cyber
X – The Ethical Hacking Services is a Portuguese cybersecurity company operating globally. We deliver
- impact security assessments, red teaming operations, and build proprietary Saa
S solutions to make the world safer.

Our product is confidential, but it’s real, it’s bold, and it’s already attracting global attention.

We believe in responsibility , freedom , curiosity , and excellence . You won’t find “mimimi” here.

Inclusion at Cyber
X We welcome candidates from all walks of life, regardless of gender, ethnicity, age, religion, disability, sexual orientation, or identity.

Great minds don’t look the same. And that’s exactly what we want.

Ready to apply? Apply via Linked
In or s end your CV and Portfolio to contato@cyberx. pt

Important: Applications sent directly to Cyber
X team members will not be considered. Please apply through the official channel only.