Fullstack Engineer

Fullstack Developer (Node.js / HubSpot Custom Apps)Client: Financial InstitutionEngagement: B2B / ContractWorking hours: 10:00–18:00 (UK time, fully remote, no travel required)Rate: 120–160 PLN/hourProcess: 2-stage recruitment processTeam: 2 Developers, Project Manager, ArchitectAbout the RoleWe are looking for an experienced Fullstack Developer to join our team and support the further development of an existing CRM system. The role focuses on extending a HubSpot-based solution with new functionalities across frontend, backend, and external system integrations.You will collaborate with a compact, highly skilled delivery team on a project for a financial sector client, contributing to both solution design and hands-on implementation.ResponsibilitiesAs a Fullstack Developer, you will be responsible for:Designing and developing a new module for an existing HubSpot Custom App, including a user interface for internal HubSpot usersImplementing a management panel for trial access and customer licensesIntegrating the application with existing internal APIsIdentifying and delivering missing backend functionalitiesDeveloping Node.js integration code connecting LMS webhooks with the authentication systemAutomating user account creation triggered by LMS eventsAutomating assignment of user roles and permissions based on data from the learning systemEnsuring data consistency and reliability across systemsImplementing error handling, retries, and monitoring for webhook-driven workflowsRequirementsProven experience as a Fullstack DeveloperStrong proficiency in Node.jsExperience with API integrations and webhook-based architecturesExperience with CRM systems, preferably HubSpot Custom AppsGood understanding of backend processes, authentication, and authorizationAbility to work both independently and within a cross-functional teamExperience in the financial sector is a plusBenefitsMedicover healthcare packageMultisport cardAccess to an e-learning platformGroup life insuranceWhat We OfferLong-term cooperation with a well-defined project scopeCompetitive hourly rate: 120–160 PLN/hourFully remote workWork in a small, experienced, and supportive technical team