Backend Engineer

As a Backend Engineer you should be curious about how to build large-scale, business-critical systems with modern technologies and your responsibilities will include research, design, and implement features and services that can scale in an efficient and reliable manner.Mentimeter is a high transaction system built in React, Redux, Ruby, Node.JS with a PostgreSQL database for persistence, Redis for caching and queuing, AWS Redshift for Business Intelligence, CloudFront as a CDN (with Lambda@Edge), and WebSockets to enable a fast and interactive polling experience. Hosting is done on Heroku and AWS with Continuous Integration using Github and Circle CI. We also utilize GatsbyJS for our static content sites to be able to deliver a blazing fast experience for our end users.We are in an exciting phase where the platform must evolve in order to ensure continued performance, scalability, security and maintainability of the platform and our business. You will be part of taking the decision on what architecture and technologies are best suited for our future challenges. We are, for example, looking to build our own WebSocket infrastructure for better control and reliability (perhaps based on Go) and opening up a Public API enabling the possibility of an ecosystem of new innovations based on Mentimeter technology.We work in small, independent, self-organizing teams. The teams’ product manager and engineering lead work together to organize and plan the teams’ backlog using agile processes focusing on continuously delivering great features to our users.What you'll do:Creating strong morale, foster open dialogue as well as sharing wins and recognitionTake important decisions that will affect future scalability and architectureImplement features, housekeeping, and care for the quality of the codeCollaborate with product manager to find the best solution for each challengeHelp ensure we have a smooth software pipeline for continuous and fast deliveryImplement features while ensuring long term stability of our system and quality of the codeAs a Backend Engineer be able to take on initiatives and follow others’ requirementsInfluence which tools, programming languages, and technologies you work withBalancing discovery phases with implementation workBe excellent working both independently and in a teamWe believe you have:At least 3 years of relevant working experienceAcademic backgroundHave been part project building modern high performing web-servicesDatabase modeling and performance optimizationExperience in some of the techniques we use (see below)Passion for software development, scalable architecture and product buildingCare about code quality, testing and automationIt is great if you have experience with:RubyNode.jsHigh transaction systemsBuilding modern high performing web-servicesDatabase modelling and performance analysisAWS LambdaExperience in high transactional systemsWebsocket scalingContinuous Deployment/Continuous Integration systemsDevOpsWebsocket scalingConfiguration of Continuous Deployment solutionsFlow for static typingPostgresReactReduxWebpackFela (CSS-in-js)Mentimeter is a product-first, gender-equal, tech-heavy, fast-growing, inclusive and profitable startup built by engineers. Back in 2014, we felt that boring and inefficient meetings had to go, so we decided to build a platform to change this. Four years later, we are listed as the fastest growing Swedish startup, have more than 40 million users and customers from over 120 countries; the journey has just begun.Mentimeter Culture:The work environment is inclusive, respectful, non-political, fun and very professional. We make sure to excel when we need to, but never overdo it in order to maintain our work-life balance. With 19 different nationalities currently working at Mentimeter, this is one of many ways we show that we embrace diversity.To embrace other cultures we also re-locate the entire team one month, once a year.Core values in bullet format:Inclusiveness - transparency, equality and diversityWork smart - good enough, but know when to excelProfessionalism - "the consultant mindset"Be humble to other people’s workHave fun