Senior Software Engineer (Java/Kotlin) - Delivery Experience

<h3>Job Description</h3><p>The salary range for this position is <strong>PLN 16 100 - 23 200</strong><strong> (contract of employment)</strong></p><p><strong>A hybrid work model that incorporates solutions developed by the leader and the team</strong></p><p>At <strong>Delivery Experience</strong>, we build the technology we need to make Allegro deliveries easy, cheap, quick and reliable. We take care of the critical services along the Allegro purchase pathway and build the new logistics tools enabling the development of logistics infrastructure. Our key services are responsible for:</p><ul><li>expected delivery time estimations, calculated using statistical algorithms and machine learning, with predictions served more than 2 mln times per second</li><li>selecting the best delivery method for the customer: traffic up to 15 000 rps, response in 200 ms</li><li>integration with courier companies, which enables e.g. the free-of-charge Smart! delivery programme, with up to 500 shipment status updates per second</li></ul><p>Delivery Experience is also one of the fastest growing areas where we implement new, complex and ambitious projects:</p><ul><li>Allegro Fulfilment, which offers full logistics services to merchants in our warehouses</li><li>Allegro Last Mile – a pilot project involving collection points and parcel lockers</li></ul><p><strong>We are looking for people who:</strong></p><ul><li>Are familiar with at least one of JVM languages: Java/Kotlin/Scala/Groovy</li><li>Expect tasks that have a deeper meaning (not just “I was ordered to do it”) and want to enjoy the results of their work</li><li>Want to be proud of the code they write, are open to feedback and are willing to share their knowledge during code reviews</li><li>Have ideas and are willing to to get involved in designing solution architecture</li><li>Can search for efficient solutions to meet users’ needs</li><li>Are eager to continuously develop their skills and expand their knowledge</li><li>Are fluent in English - min. B2 level</li></ul><p><strong>What we offer:</strong></p><ul><li>A hybrid work model that you will agree on with your leader and the team. We have well-located offices (with fully equipped kitchens and bicycle parking facilities) and excellent working tools (height-adjustable desks, interactive conference rooms)</li><li>Long term discretionary incentive plan based on Allegro.eu shares</li><li>Annual bonus up to 10% of the annual salary gross (depending on your annual assessment and the company's results)</li><li>A wide selection of fringe benefits in a cafeteria plan – you choose what you like (e.g. medical, sports or lunch packages, insurance, purchase vouchers)</li><li>English classes that we pay for related to the specific nature of your job</li><li>Laptop with m1 processor, 32GB RAM, SSD - a 16” or 14” MacBook Pro or corresponding Dell with Windows (if you don’t like Macs), two monitors and all other gadgets that you should need</li><li>Working in a team you can always count on — we have on board top-class specialists and experts in their areas of expertise</li><li>A high degree of autonomy in terms of organizing your team’s work; we encourage you to develop continuously and try out new things</li><li>Hackathons, team tourism, training budget and an internal educational platform, MindUp (including training courses on work organization, means of communications, motivation to work and various technologies and subject-matter issues)</li><li>If you want to learn more, <a href="https://allegro.tech/booklet.pdf"> check it out</a></li></ul><p><strong>In your daily work you will handle the following tasks:</strong></p><ul><li>Work in an autonomous interdisciplinary team and cooperation with product managers, data analysts and UX experts</li><li>Technology impact – the team is responsible for the architecture of the solution</li><li>Impact on what Allegro Customers see, starting from the first design and mock-ups, through to tests and implementation</li><li>With great power comes great responsibility, which is why we foreground the quality and full reliability of our solutions. You implement your code in the production environment and you become accountable for its efficiency and stability</li></ul><p><strong>Why is it worth working with us?</strong></p><ul><li>Our technology stack is:<ul><li>backend services: Kotlin or Java (11 or newer) using Spring</li><li>frontend: React or Angular </li><li>we store the data in: MongoDB, Cassandra, Couchbase, Elasticsearch</li><li>we process data using: Spark, Jupyter, Hadoop, GCP</li></ul></li><li>We operate on a large scale:<ul><li>architecture composed of over 1 000 microservices divided into domains</li><li>communication asynchronously over the Hermes data bus based on Kafka (100 000 rps of incoming traffic)</li><li>traffic between services, measured by Service Mesh, is almost 2 million rps</li></ul></li><li>The IT team is made up of over 1 700 members who have shared their knowledge at multiple