Senior Back end Engineer (Poland, Remote)

About First Connect:First Connect Insurance Services is a digital marketplace providing independent insurance agents access to top US carriers and the optionality necessary to grow their businesses. Agents can work with 130+ carriers, selling various insurance policies, including home, auto, small business, and more. We’re on a mission to overhaul the technology agents have access to, putting consumer-grade software at their fingertips. We’ve got thousands of active agents with hundreds joining monthly, and we plan to accelerate our growth. Role Overview:The core of our business revolves around retrieving and processing vast amounts of insurance carrier data. This isn’t just about moving numbers – this data enables our most critical platform features and powers the entire agency commission cycle.As a Senior Backend Engineer in this role, you will own this domain. We need someone who thrives in data-heavy environments and can architect systems that handle diverse data configurations and varying levels of data quality with precision. You’ll work closely with Product, Design, Business, and Finance teams to prioritize, build, and monitor the systems that form the very backbone of our business.If you’re a Senior Engineer who loves tackling complex data challenges, spotting patterns in chaos, and shaking things up, you’ve come to the right place. 🚀What You’ll Do:Architect Data Pipelines: Design and own the systems responsible for processing massive datasets from 130+ different carriers, ensuring high availability and reliabilityMaster Data Complexity: Build robust logic to handle various data configurations, ensuring accuracy in our crucial commission and platform featuresEnsure Data Quality: Implement advanced patterns and monitoring to identify and resolve data quality issues before they impact the businessScale Asynchronous Systems: Optimize our event-driven architecture to ensure seamless, real-time data processing at scaleCross-Functional Ownership: Collaborate with Finance and Business teams to translate complex data requirements into scalable technical solutionsWe might be a match if:You have 6+ years of commercial experience with a heavy focus on backend systems and complex data processingYou have a data-heavy expertise: Proven experience in building systems that handle large, diverse datasets and complex integrationsYou have technical Mastery: Proficiency with Node.js, TypeScript, NestJS, and PostgreSQLYou gained architectural Excellence: Strong background in asynchronous system architecture and a sharp eye for good design patternsYou have a Startup Mindset: High ownership and the ability to navigate ambiguity. We are looking for people who want to build and grow, not just maintainYou are based in Poland with flexibility for partial US time zone overlapYou’ll get extra points for:Interest in mentoring others and stepping into a lead roleAdvanced SQL & Optimization: Deep knowledge of PostgreSQL performance tuning, indexing strategies, and handling large-scale datasetsRecruitment process:Our goal is to be thorough while respecting your time.Send us your CV – it's the best way for us to get to know you.Meet Karolina, our Recruiter for initial interviewJoin a technical interview with our Team MembersMeet our team for a live coding interviewTalk with Michał, our Hiring ManagerJoin Wojtek and Ola for final stage call... and welcome aboard! 👋What benefits are waiting for you:Salary26.000 PLN - 31.000 PLN net + VAT on B2BBasics 🌎 Remote work & flexible working hours 🤒 Paid sick leave🏖️ Paid holidaysHealth & Safety💊 Private medical care with dentists & orthodontists package for you and your family ❤️ Group life insurance🧘 Psychotherapists support — free online sessions with psychologists and psychotherapists🤸 Home physiotherapy🏅 Multisport card & meditation apps reimbursed 50%Working conditions & Development💻 Gear with Apple Logo and a nice Dell monitor🌱 50% reimbursement for courses, conferences, books & certificates🇺🇸 Free access to private language lessons🐕 6 Personal Development Days & 4 Voluntary Days Off Extras you may like🎫 Cafeteria platform — extra “stówka”every month to spend on whatever you want to🧒 Nanny services for parents 📦 Concierge services – a personal assistant to help you to deal with your everyday matters🎉 Team building events — we party together several times a year during the annual Offsite & Christmas Parties, or our workation week in Mediterranean