Senior Backend Engineer (Warsaw)

Engineering at hyperexponentialAt hyperexponential (hx) we are transforming the traditional insurance industry with our groundbreaking SaaS platform, hx Renew. Insurers use it to build complex mathematical models that enable smarter, faster pricing decisions—whether it’s calculating the cost to insure a global superstar’s concert tour or protecting entire states from natural disasters.With hx Renew, insurers can rapidly develop and iterate pricing models in Python and React within a modern software environment, free from the burden of legacy tech. What once took months now takes weeks—or even days. This agility has made our product the go-to platform for insurers worldwide.In just five years, our winning formula has earned the trust of industry giants like Aviva and Top 5 US insurers, as well as cutting-edge innovators like Convex and Inigo. Our engineering team—made up of some of the brightest (and kindest!) minds in the industry—pushes technological boundaries every day through creative innovation and regular hackathons.Your MissionThe Policies Team works at the heart of our product hx Renew, building a system that keeps track of all our customers’ models, policies and much more! Sounds like a boring CRUD? We have domain logic and invariants to show for and to keep track of. Your mission – should you choose to accept it – will be to join us on the journey of chopping the monolith, introducing DDD and hexagonal architecture to our code, all while delivering brand new workflows and features.Key ResponsibilitiesHelp us build the right thing by working with product managers, designers, fellow engineers and (sometimes) customers to understand problems and develop solutionsHelp us build the right thing by writing high-quality, thoughtful, simple, commented, documented, tested, well-structured code aligned to our constants, principles and standardsHelp drive our technical standards, decisions, and strategyContinually learn and improve yourself - experiment and play with new technologies through your work and hackathonsHelp reduce friction and eliminate impediments that slow us downPromote hx in the community by contributing to open source projects, writing blog posts and/or presenting at virtual meetups/conferencesHelp support our product in production by joining an on-call rotaAny Experience on the following would be great!The majority of our work lies with Kotlin, Spring & Hibernate, so experience with Kotlin would be best, but any JVM language will be highly relevant as well.You will be upskilled in Kotlin if you didn’t already use it!We will focus on deeper architectural work like modularising our monolith and isolating technical solutions like authentication and authorisation.Additionally, we are conducting product work on new features expanding our product coverage.Interview ProcessInitial screening with Talent team to kick things offManager Interview (60 minutes)Technical Assessment (120 minutes)Values Interview (60 minutes)We offer!Please note that background checks will be conducted as part of the hiring process to ensure compliance with our governance policies. We handle all background checks sensitively and in full compliance with relevant regulations. All applicant data will be processed in accordance with data protection regulations and our privacy policy.

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