Senior Software Engineer, Security

The posting, as Linktree wrote it

The Role

We’re looking for a Senior Software Engineer to join our security team - the group responsible for keeping 70+ million creators, and everything they’ve built, safe. Linktree is the front door to a creator’s whole digital presence, which makes it a target: account takeover, abusive content, scraped data, third-party integrations with more access than they should have. This role is about building the systems that make those attacks hard.

This is hands-on engineering, not advisory work. You’ll design and ship authentication and authorisation improvements, secrets handling, abuse and fraud detection, and the internal tooling that lets every other squad build securely by default. You’ll be across TypeScript, Node, React and AWS, and you’ll work with Engineering, Product and Trust & Safety to decide where to harden, where to simplify, and where a control costs more in creator friction than it buys in risk reduction.

It’s a role for someone who thinks in systems and failure modes, who would rather remove a class of vulnerability than patch instances of it, and who can bring other engineers along rather than block them. Every control you ship protects someone’s livelihood - and helps Linktree achieve our mission: to empower anyone to curate and grow their digital universe.

What You’ll Own

• Design and ship security improvements across the Linktree product: authentication and authorisation, session and token handling, secrets management and third-party access.
• Build the detection and response capability for the product surface - abuse, account takeover, scraping and fraud - so problems surface before creators report them.
• Threat model new and existing systems with the squads that own them, and turn the output into prioritised, shipped work.
• Own the internal tooling and paved paths that make it easy for every other engineer to build securely by default.
• Triage and remediate vulnerabilities from internal findings, bug bounty and pen tests, and fix the class of problem rather than the instance.
• Partner with Engineering, Product and Trust & Safety on where to harden and where a control costs more in creator friction than it buys in risk reduction.
• Bring AI into how you build, and use it to move faster on reviews, migrations and investigation - while staying clear-eyed about what it gets wrong.
• Raise the security bar around you through review, pairing, documentation and mentoring.

Who We’re Looking For

• 4+ years of professional software engineering experience, with meaningful time spent on security, infrastructure, identity or another domain where getting it wrong is expensive.
• Strong full-stack skills across our core stack: TypeScript, Node.js , React, GraphQL, PostgreSQL or MySQL and AWS, with the ability to move across layers to ship a fix end-to-end.
• Working knowledge of application security fundamentals: the OWASP Top 10, authentication and authorisation, secrets management, cryptography in practice, and th

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childcare, travel, charitable donations, pet insurance, home office set up - the choice is yours!

• 100% coverage (and 80% for your dependents) of your monthly premiums for medical, dental, vision, disability and life insurance for US-based employees.
• Employer contribution towards your retirement.
• Generous time off for vacation, holidays, parental leave, volunteer time and other categories.
• Employee Stock Option Program - we want each and every employee to share in the company’s success as we go further together.

To learn more about our benefits, including our parental leave program, volunteering leave, DE&I initiatives, and more, click here !

Our Story

We're on a mission to empower anyone to curate, grow and monetize their digital universe. We created the "link in bio" category and are trusted by some of the world's biggest brands and celebrities including TikTok, The UN Environmental Program, The White House, F1, Manchester United, Olivia Rodrigo and Selena Gomez. With over 50M+ users and 40,000 new accounts created everyday, Linktree is the fastest growing leader in our category. Linktree has partnered with some of today’s biggest names like Amazon, TikTok, Snap, YouTube, GoFundMe, Spotify, Google, Stripe, Reddit and more to help unify users’ digital spaces— and we’re just getting started. Join us in empowering everyone from businesses to creatives in building their online presence.

At Linktree, we celebrate and support everyone’s perspective and background, and we’re proud to be an equal opportunity workplace. We aim to foster a diverse and inclusive environment where all team members have a sense of belonging, because we believe in going further together. Linktree welcomes all people regardless of sex, gender identity, race, ethnicity, disability, pregnancy, age, or other lived experience. If you require accommodations to fully participate in our opportunities, please don't hesitate to reach us at talent@linktr.ee – your needs are important to us.