Full Stack Engineer

Full Stack EngineerBoston, MA / Engineering / Full-TimeLendbuzz is a fintech startup founded in 2015 by MIT alumni using cutting-edge machine learning to revolutionize vehicle financing and change the way deserving borrowers access credit. The company is post-round C and pre-IPO. The engineering team at Lendbuzz is a tight group of engineers and data scientists. Our stack consists of a Python and Flask data core and user-facing systems built in Ruby on Rails and React. We use a minimal process and week-long sprints to balance new product development with the infrastructure to make our lives easier. Working hours are flexible, and the office is located in the most accessible part of Boston. You will find great people, outstanding products, and a meaningful mission. We are looking for experienced, passionate engineers to join our backend team in Boston. Come see why we have over 200 5-star reviews from happy customers!What is your day like:Participate in all aspects of agile software development, including design, implementation, and deploymentArchitect and provide guidance on building end-to-end systems optimized for speed and scaleWork primarily in Ruby, React, and Node.js to build infra libraryImprove visibility across frontend, backend, infra teamsEngage with inspiring designers and front-end engineers, and collaborate with leading back-end engineers as we create reliable APIsCollaborate across time zones via Slack, GitHub comments, documents, and video conferencesAnalyze manual processes and automate them whenever possible to ensure a smooth operation of workflows.Work in partnership with fellow developers on implementing new ideas, features, and apps.Collaborate with product management, quality assurance, customer support, and fellow software engineers to deliver features that meet our customers’ needs.Research and prototype new technologies that can improve pipelines and build processes.Perform additional tasks and/or duties as assignedTo thrive in this role you have:You have a bachelor’s degree or above or an equivalent combination of education, training, and experience in computer science or the equivalent.2+ years of experience building cloud based software applicationsYou care about the architecture & overall picture than implementing the logic of the productYou are curious about AWS & cloud fortable in all areas of the product lifecycle - analysis, design, coding, testing, and troubleshootingExperience building web applicationsExperience designing and integrating RESTful APIsKnowledge of Ruby, React, Node.js, and JavascriptExcellent debugging and optimization skillsUnit/integration testing experienceKnowledge of Linux, Bash & DockerWhy Us:Learn how we leverage technology to underwrite smart car loansHigh-impact roles in a small fast, growing companySolve unique problems as we grow togetherOpportunity to lead your projectsAwesome work culture - stacked kitchen, fun game nights, movie nights, and whatever you can think of doing as a teammateFlexible working hoursWhat are some of the projects you will work on:Build a version of the infra library in Ruby and implement it in Frontend server.Build a version of the infra library in Node.js and implement it in the Web Sockets server.Assist in splitting React from Rails to 2 different projects that use CSR.Assist in implementing CDNAssist in breaking frontend monolith to several apps on the Ruby and React sides.Assist in improving RBAC (Role Based Access Control) and help make it as secure as possible.Improve code security & also fix vulnerabilities detected by Snyk (or similar)Improve team's work visibility towards the Infra and other teams.Help containerize applications according to security best practices.Help scale using ECS auto-scaling (make sure the code can work in autoscaling)Build & maintain Github Actions CI pipelines #J-18808-Ljbffr

Created: 2025-09-17