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Summer Internship - Application Security (AppSec)

UpholdBraga PortoHybrid

About Uphold
Uphold is a financial technology company that believes on-chain services are the future of finance. It provides modern infrastructure for on-chain payments, banking, and investments. Offering Consumer Services, Business Services, and Institutional Trading, Uphold makes pioneering financial services easy and trusted for millions of customers in more than 140 countries.Uphold strips away the complexity and lack of transparency to open up Web3 finance for everyone.To learn more about Uphold, please visit https://uphold.com.The opportunity:Uphold is looking for an intern to join our Application Security (AppSec) team for a Summer Internship.

This is an exciting opportunity where you’ll dive into real-world product security, work closely with developers and security engineers, and contribute directly to improving the security of our products and infrastructure.Primary responsibilities:As a Summer Intern in our Application Security (AppSec) team, you’ll get a unique first experience in cybersecurity, not in theory, but in practice. You’ll be part of a team that works directly with developers to build secure products, where security is respected and embraced, not feared or avoided.

With the support of your mentor and buddy, you’ll explore how we find, analyze, and help fix vulnerabilities in real source code. You’ll also learn how modern companies approach AppSec in a structured, collaborative, and impactful way.This is what the Summer internship looks like:

  • 8-week program: July 14 to September 5, 2025.
  • Work setup: Based in Braga or Porto, with remote and hybrid options available.
  • Welcome gift: You’ll receive some cool Uphold swag!
  • Mentor: A mentor will guide your work and provide ongoing feedback.
  • Buddy: A buddy will help you settle in and support you along the way.
  • Equipment: We’ll provide a laptop for the duration of your internship.
  • Compensation: Successfully completing the internship makes you eligible for up to €2,500!
  • Future opportunities: This is a short-term internship, but great work tends to get noticed!

Required qualifications:

  • Currently pursuing or recently completed a degree in Computer Science, Cybersecurity, Engineering, or a related field.
  • A hacker mindset, curiosity, persistence, and a passion for figuring out how things work (and how they fail).
  • Experience solving security challenges (e.g., CTFs, Hack The Box, TryHackMe, custom labs, or similar).
  • Comfortable with at least one programming language and reading/debugging source code (JavaScript, Python, Go, etc.).
  • Basic knowledge of web security fundamentals, things like XSS, SQLi, SSRF, auth issues, etc.
  • Some familiarity with security tooling (e.g., Burp Suite, Semgrep, CodeQL, or custom scripts).
  • Fluent in English, both written and spoken.

Bonus if you have: 

  • Contributed to GitHub repos or written blog posts about security findings, tools, or research.
  • Participated in bug bounty programs or done vulnerability triage work.
  • Exposure to DevSecOps pipelines or secure development practices.
  • Interest in Web3 security, smart contracts, etc.
  • Familiarity with version control, CI/CD pipelines, and how modern teams ship code.

What we offer: 

  • An amazing work environment and experience in a company that continues to grow, driven by extraordinary and passionate people who keep innovating and challenging themselves more each day.
  • The chance to work on exciting, meaningful projects with an international team in a cutting-edge field.
  • A flexible and enthusiastic work environment that offers you snacks, a lot of coffee, and other great benefits.
  • A culture of openness and transparency — we meet weekly to share updates, talk strategy, and connect over food and drinks.
  • Team events and celebrations help you build connections, celebrate our success, and have some fun along the way.

Join us to grow, innovate, and contribute meaningfully. Be part of our talented team!Deadline - June 10thVisit our careers page for more exciting opportunities if this Summer internship isn’t the perfect fit.EEOC EmployerWe're proud to be an Equal Opportunity Employer, and we celebrate our employees' differences, including race, color, religion, gender identity, national origin, age, military service eligibility, veteran status, sexual orientation, marital status, disability, and any other protected classes.

Difference makes us stronger and better - together.

Life at Uphold

At Uphold, our mission is to create trusted access to digital money and financial services for the many. Since inception, we have fought to provide a fairer, easier and more affordable system. We favor speed, simplicity and ease of use over complexity. We put security and transparency first. Our commitment to transparency sets a new standard for the industry. Unlike banks, we are fully reserved: we hold assets to match our obligations and publish both in real time. Our industry is littered with systems and companies that put their interests before those of their customers. Countless individuals find their financial lives challenged by high barriers to entry, hard-to-use products, poor customer service and glacial transaction speeds. Today's emerging world of cryptocurrencies and blockchain-based assets is no different: access remains risky, complex and expensive. At Uphold, we constantly strive to solve these problems with elegant solutions that remove friction. Founded as Bitreserve in 2013, our original goal was to protect investors from cryptocurrency volatility by allowing them to instantly, securely and affordably move funds into Fiat currencies. This remains at the heart of what we do today.
Thrive Here & What We Value1. Innovation and Impact2. Competitive Compensation3. Strong Company Culture4. Global AllHands Calls5. Development Opportunities6. Flexibility in Work Arrangements7. Inclusive and Diverse Environment8. Generous PTO, Healthcare Coverage, and Employee Assistance Programs9. Interesting and Fun Events and Celebrations10. Foodie Culture and WellStocked Office Kitchen

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