Full Stack Engineer

Backend-Leaning Full Stack EngineerLocation: London – 4 days onsiteSalary: Up to £55,000 + benefits + share optionsEmployment Type: Permanent, full-timeThe OpportunityWe are partnering with a growing London fintech that is building products designed to help people access, manage and save their money more effectively.They are looking for a backend-leaning Full Stack Engineer to join a small, hands-on engineering team and take real ownership of core services, APIs, integrations and customer-facing product features.This role would suit an engineer who enjoys understanding the wider business problem, contributing to technical decisions and improving production systems, rather than simply working through pre-defined tickets.What You’ll Be DoingDesigning and building backend services using Node.js and TypeScriptDeveloping secure REST and GraphQL APIsBuilding and improving third-party integrationsWorking on payment, payroll and financial-data workflowsDesigning and maintaining database-backed systemsImproving the reliability, scalability and performance of production applicationsInvestigating production issues and resolving root causesStrengthening automated testing, monitoring and deployment processesContributing to React-based product features when requiredOwning work from initial requirement through to production releaseCollaborating closely with engineering, product and business stakeholdersTechnology EnvironmentNode.jsTypeScriptReactPostgreSQLMongoDBAWSDockerCI/CDREST APIsGraphQLMicroservices and event-driven systemsWhat We’re Looking ForAround 3–7 years of commercial software engineering experienceStrong backend development experience with Node.js and TypeScriptExperience designing and building production APIsGood knowledge of PostgreSQL or another relational databaseHands-on experience with AWSExperience with Docker, CI/CD and automated testingConfidence working across the full development lifecycleStrong problem-solving and communication skillsA genuine ownership mindsetParticularly Relevant ExperienceExperience in any of the following would be valuable:FintechPaymentsPayrollBankingBilling or subscriptionsFinancial servicesSaaS platformsAPI integrationsEvent-driven systemsQueues or messaging technologiesProduction incident resolutionAuthentication, permissions or security workflowsThe EnvironmentYou will be joining a small engineering team where your work will be visible and your input will matter.The business is looking for someone who is:Proactive and commercially awareComfortable working through ambiguityInterested in product outcomes, not just technical deliveryWilling to challenge assumptions constructivelyMotivated by ownership and progressionPackageSalary up to £55,000BenefitsShare optionsLondon-based roleFour days per week onsiteOpportunity to influence a growing fintech product and engineering functionTo apply, submit your CV or contact Sean Murphy at Connect AI for further details.