Senior Back-End (API) Engineer

About the companyWe are recruiting on behalf of a US-based technology company transforming how real estate professionals run their businesses. Its platform brings together CRM, marketing, communication and business workflows in one product used by real estate teams in the US.This is a high-impact backend role for an engineer who enjoys working with large datasets, complex APIs and production systems at scale. You will have genuine ownership of features, from technical planning through to production, while working closely with a distributed US engineering team.What you will be working onBuilding and evolving scalable backend services and APIsWorking extensively with Node.js, JavaScript and PostgreSQLWriting pure SQL and working directly with the database rather than relying solely on an ORMDesigning solutions for data-intensive production applicationsMaking architectural decisions with a strong focus on performance, reliability and maintainabilityTaking ownership of features from idea and planning through to productionWorking with a distributed engineering team and clearly communicating technical decisions and trade-offsWhat we are looking forMust-havesSenior-level backend and API engineering experienceStrong hands-on Node.js and JavaScript experienceStrong PostgreSQL expertise, including pure SQL without an ORMProven experience building scalable, data-intensive production applicationsStrong API design and development skillsSolid experience with backend architecture, testing and maintainabilityDemonstrated end-to-end ownership of featuresAbility to explain technical decisions and trade-offs clearlyNice-to-havesRabbitMQRedisExperience leading projects or major featuresBackground in real estate technology, CRM or marketing platformsLocation and working hoursRemote role for candidates based in PolandFlexible working scheduleMinimum 4 hours of overlap with the US teamIf you're a Senior Backend Engineer who likes owning meaningful technical problems, working close to the data and building systems that operate at scale, this could be a strong opportunity.