Senior Full Stack Engineer

About SplinkSplink is an AI supply chain technology startup modernizing the $1T consumer packaged goods (CPG) industry — a space still heavily reliant on outdated systems and manual workflows. We partner with leading manufacturers (e.g., P&G, Energizer) and distributors to streamline operations, unlock better decision-making, and drive profitability through intelligent automation and data infrastructure.We recently closed a funding round and are now building out our engineering team to drive the next stage of product growth.What this role is aboutWe are looking for a Senior Full Stack Engineer to help build and scale the core platform powering Splink’s next phase of growth. This is a highly hands-on role focused on shipping product, solving complex technical problems, and working closely with leadership to turn operational challenges into scalable software.You’ll work across the stack to design systems, build new product capabilities, improve reliability, and help shape engineering culture as we continue to grow. This role is ideal for someone who thrives in fast-moving startup environments, enjoys ownership, and wants to help build foundational infrastructure for a massive, underserved industry.What you’ll doShip product — hands-on, end-to-end. Work on full-stack development across the platform. Design data models, own API contracts, and build user-facing experiences that turn complex operational data into clear, actionable insight for customers.Take ownership of the existing system. Absorb deep context from our existing development team. Convert implicit knowledge into documentation, runbooks, and maintainable code. Improve observability, reliability, and deployment safety across the stack.Build net-new platform capabilities. Help expand the platform with new systems, workflows, integrations, and AI-enabled tooling that support Splink’s long-term vision.Partner closely with founders and stakeholders. Translate business needs and operational complexity into pragmatic technical solutions while collaborating directly with leadership, customers, and internal teams.Use modern tooling effectively. Leverage modern AI development tools, such as Claude and Cursor, to accelerate development velocity, reduce busywork, and improve engineering productivity without sacrificing quality.What we’re looking for in our ideal candidate5+ years of professional full-stack engineering experience, backend-leaning with meaningful frontend ownershipStrong experience building production systems with real customers and operational dataExperience designing and working with relational databases and complex data modelsExperience building and maintaining integrations with third-party systems, APIs, or external data sourcesStrong product and engineering instincts — balancing speed, maintainability, and scalabilityComfort working within and improving an existing codebase without unnecessary overengineeringAbility to work directly with non-technical stakeholders and translate operational workflows into well-structured systemsHigh degree of ownership and self-direction in ambiguous, fast-moving environmentsStrong written and verbal communication skillsBased in or able to commute to Brooklyn, NY, with 3 days per week in-officeWe don’t expect you to have experience in every area listed — if this role excites you and you believe you can grow into it, we encourage you to apply.Nice-to-have experience (not required!)Startup or high-growth company experienceExposure to data-intensive or supply chain adjacent domainsFamiliarity with Python-based data pipelinesExperience translating technical strategy into customer-facing narrativesOur stackOur infrastructure is entirely hosted in AWS.FrontendLanguage: TypeScriptFrameworks: Next.js, ReactStyling: Tailwind, SassBackendLanguage: TypeScriptFrameworks: Node.js, Express.jsData: PostgreSQL, Sequelize (ORM)Caching: RedisData PlatformLanguage: PythonFrameworks: DagsterYou do not need prior experience with every tool we use to be successful in this.Compensation and benefitsBase salary: $160,000 – $240,000, depending on experience and skillsEquity: 0.5% – 1.0%Flexible paid time offHoliday schedule aligned with standard US holidaysInclusion and equal opportunityWe want Splink to be a place where you can do your best work without masking who you are. Splink is an equal opportunity employer. We do not discriminate based on race, ethnicity, color, religion, sex, sexual orientation, gender identity or expression, national origin, age, disability, veteran status, citizenship, or any other characteristic protected by applicable law.We use a structured interview process with consistent questions and evaluation criteria. We will use the name and pronouns you share with us throughout the hiring process.If you need an accommodation to participate in the application or interview process, please let us know. We will work with you to make it accessible.