[Remote] Senior Full Stack Engineer - North America (Remote)

Note: The job is a remote job and is open to candidates in USA. Linkby is a growing, VC-backed adtech startup focused on connecting brands with trusted voices through a performance-based press release platform. They are seeking a Senior Full Stack Developer to build and scale their publishing marketplace, responsible for designing, implementing, and managing high-quality web applications while mentoring teammates and influencing technical direction.ResponsibilitiesDesign and implement high-quality, scalable and resilient web applicationsShip features end-to-end in partnership with product managers and designers: design APIs, optimize queries, polish UI and own the outcomesDeploy and manage cloud-native applications on AWS, ensuring high availability, performance, and securityContribute to and influence architecture decisions that will shape how we scale the marketplace over the next 12–24 monthsBuild AI-powered platform capabilities - semantic matching between brands and publishers, in-app agents, campaign performance prediction, etcKeep the platform fast, reliable, and secure under load; proactively address bottlenecks and production issuesImplement security best practices (e.g. OWASP guidelines) and ensure compliance with data privacy regulations (e.g. GDPR, CCPA) across all development stages, including secure coding, data encryption, and access controlDrive continuous improvement through code reviews, agentic workflows, automated testing, and CI/CD practicesMentor teammates through code reviews, pairing, and career developmentSkillsProficiency in both front-end (JavaScript/TypeScript, Vue/React) and back-end (Node.js, Golang) technologiesFluency in databases (PostgreSQL, Clickhouse), APIs (REST/GraphQL), and cloud infrastructure (AWS/GCP)Real experience directing agentic coding workflows: you've used tools like Cursor or Claude Code to scaffold entire features, caught the subtle bugs they introduce, and know where they reliably fall shortProficiency operating in both human-in-the-loop and human-on-the-loop paradigms - you know when a task needs you steering every step versus when you set constraints and let an agent run, then review the output. You can articulate why you'd choose one over the other for a given problemStrong understanding of software engineering principles, design patterns, and best practices - AI tools make you faster, but you know what's happening under the hood and can debug a production outage at 2 AM without themExperience integrating LLM APIs or ML models into production applications - not just calling an endpoint, but handling prompt management, output validation, cost control, and graceful degradationComfort working in fast-moving environments: you bias for shipping, iterate quickly, and bring others along with youA track record of influencing architecture, scaling systems, and making pragmatic trade-offsStrong communication skills: you can advocate for smart technical decisions with leadership, while ensuring the team feels heard and supportedBonus: background in adtech, programmatic advertising, or marketplace platforms with proven track record in developing and scaling high-traffic, large-scale applicationsBenefitsEquity package (we believe in shared upside)Flexible remote work + optional office accessGenerous paid time off / leave policyHealth & wellness benefits (depending on location)Opportunities for fast growth, mentorship, and leadershipHigh autonomy and ownership - you’ll see the direct impact of your workCompany OverviewLinkBy makes your brand famous with cost-per-click press releases sent to the publishing brands. It was founded in 2020, and is headquartered in Sydney, New South Wales, AUS, with a workforce of 51-200 employees. Its website is https://linkby.com/.