Software Engineer, Trust & Safety

Resend

Europe

Remote

Who this role is best for

Trust and safety professionals with real-time enforcement and ML detection experience will find this role in email security and abuse prevention at Resend

Best fit for

Candidates with 5+ years of software engineering experience and a background in trust and safety or fraud detection
— “Bring 5+ years of software engineering experience”
Individuals with expertise in building detection pipelines and handling email security protocols like SPF, DKIM, and DMARC
— “Know email: SPF, DKIM, DMARC, bounces, complaints, and how phishing campaigns work”
Engineers who value observability and have experience with infrastructure tools like AWS and Datadog
— “Have infrastructure and reliability skills (AWS, CDK, Datadog)”

Things to consider

This role requires some travel for offsites and conferences despite being remote
— “with some expected travel for team offsites, conferences, meetups, and more”
Candidates must be fluent in English for communication and collaboration purposes
— “Are fluent in writing and speaking English”

How to stand out

Highlight experience with real-time enforcement systems like rate limiting or rules engines
— “Have built real-time enforcement such as rate limiting”
Emphasize your ability to design systems that fail safe and avoid false positives
— “Design systems that fail safe, and treat a false positive as a bug”
Showcase your work with ML classifiers and how you measured their precision and recall
— “Have shipped ML or LLM-based detection in production, and know how to measure its precision and recall”
Demonstrate your ability to take ownership of systems across the entire stack
— “Take ownership across the stack, from frontend surfaces down to databases and queues”

Pace · Fast PacedCollaboration · MediumAutonomy · HighDecision Impact · Individual

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

built real-time enforcement layer
designed detection pipelines
implemented safeguards

Typical background

5+ years of software engineering experienceinfrastructure and reliability skills

Skills & requirements

Required

Real-time EnforcementPipeline DesignDetection RulesAutomationsML ClassifiersSafeguards

Preferred

Trust And Safety ExperienceEmail Protocols Knowledge

Stack & domain

Node.jsTypeScriptReactGoAWSCDKDatadogPostgreSQLRedis

About the role

Original posting from Resend via Ashby

Resend is growing fast, and there are now over 4 million developers using it. We’re building tools that make email better for developers. We care about dependable infrastructure, thoughtful design, and the experience of everyone building with our products.
In this role you'll build the anti-abuse systems that keep Resend open for good senders and closed to bad actors: real-time enforcement on every email, detection pipelines that scale with the platform, and automations that go from detection to action without waiting on a human.
This role is fully remote based in Americas or European timezones, with some expected travel for team offsites, conferences, meetups, and more.
Read more about how we work, how we hire, and what we value here https://resend.com/handbook.
IN THIS ROLE, YOU WILL…
Build and run the real-time enforcement layer within a latency budget of milliseconds
Design pipelines that move from signal to decision to action, across sending, receiving and account activity
Build the detection rules and policies that decide when we act, and make them safe to change
Detect and contain account takeover and leaked API keys: notice when a trusted account stops acting like itself, and stop the damage without locking out the real owner
Close the feedback loop: every block and every reversal carries a reason, so we can measure each detection's precision and retire the ones that hurt good senders
Automate manual work such as investigations, appeals and bulk actions, so the team keeps up as volume grows
Build and evaluate ML classifiers for spam and phishing, and prove their precision before they enforce anything
Implement safeguards and make every action traceable through logs, metrics and audit trails
Ensure all enforcement actions are traceable with logs, metrics, and audit trails
YOU’LL BE A GREAT FIT IF YOU…
Bring 5+ years of software engineering experience
Are fluent in writing and speaking English
Have deep experience with Node.js, TypeScript, React (Hono, Next.js)
Write Go, or want to, for latency-sensitive services
Have infrastructure and reliability skills (AWS, CDK, Datadog)
Are comfortable with APIs, event-driven architectures, queues and stateful services
Design systems that fail safe, and treat a false positive as a bug
Care deeply about observability: metrics, logs, tracing, error handling
Take ownership across the stack, from frontend surfaces down to databases and queues
Have proven experience with databases (Postgres, Redis)
YOU WILL BE AN EXCEPTIONAL FIT IF YOU ALSO...
Have worked in trust and safety, fraud or security
Have built real-time enforcement such as rate limiting, or a rules engine on a policy language like CEL
Have shipped ML or LLM-based detection in production, and know how to measure its precision and recall
Know email: SPF, DKIM, DMARC, bounces, complaints, and how phishing campaigns work
Have knowledge of database performance tuning (Postgres, Redis)
WHAT IT MEANS TO JOIN THE TEAM:
Room to shape technical decisions and take projects from discovery through production
Work remotely with teammates around the world
Close collaboration with the developers who use what you build
Teammates who value thoughtful feedback, shared learning, and care for each other
A high bar for product quality, reliability, and the details that make software enjoyable to use
Comp: $150,000 - $175,000 USD, commensurate with location and experience
LEARN MORE ABOUT HOW WE WORK:
Our philosophy for anti-abuse https://resend.com/handbook/support/what-is-our-philosophy-for-anti-abuse
$3M to make email safer https://resend.com/blog/3-million-to-make-email-safer
Revoking leaked API keys with GitHub secret scanning https://resend.com/changelog/github-secret-scanner
ABOUT RESEND
We are building the modern email sending platform for developers. We care deeply about quality, craft, and the developer experience.
Our fully remote team of 50 spans 15 countries and counting. We're backed by a16z, Y Combinator, and others. Meet the humans → https://resend.com/humans

Source: Resend careers (Ashby)