Summary: Genestack is seeking a proactive Backend Engineer to take end-to-end ownership of complex user stories and contribute to a high-load system in the life sciences domain, collaborating with experienced engineers. Highlights: 1. Solve complex technical challenges in a meaningful scientific domain. 2. Take high ownership and make a real impact on product direction. 3. Be part of an engineering-driven culture with pragmatic decision-making. **At Genestack** we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. **Our platform** is deployed at leading pharmaceutical, agricultural, and consumer goods companies as well as leading academic institutions and this is just the beginning of our journey. **We are looking for** a proactive Backend Engineer who is ready to grow while working on a complex, high\-load system in the life sciences domain. This is a challenging role. You will work on non\-trivial problems, collaborate closely with experienced engineers, and be expected to take ownership of outcomes — not just complete assigned tasks. We value pragmatic thinkers who can break down complex problems, make sound technical decisions, and consistently deliver incremental value. **In this role, you will:** * Take end\-to\-end ownership of complex User Stories and actively contribute to feature analysis and solution design, from refining requirements to delivering production\-ready solutions. * Collaborate closely with backend engineers on system design and implementation, proactively proposing technical solutions and taking ownership of decisions within your scope. * Contribute to the evolution of core backend components and APIs. * Write clean, maintainable code and participate in refactoring initiatives. * Optimize database queries and backend components for performance and scalability, and investigate performance bottlenecks in your areas of ownership. * Break down complex tasks into pragmatic, deliverable increments. * Proactively suggest backend and technical improvements that enhance product reliability, performance, and maintainability. * Contribute to improving engineering practices and development processes. **We would like you to have:** * 6\+ years of experience in software engineering; * strong foundation in computer science (OOP, data structures, algorithms); * solid experience with relational databases (e.g., MySQL); * experience working with ClickHouse (writing and optimizing queries); * strong proficiency in Java and/or Kotlin; * strong practical experience with Spring Framework in production systems; * hands\-on experience writing automated tests (functional and integration); * ability to independently drive complex User Stories to completion and make sound technical decisions within your scope; * strong practical use of AI tools to improve development efficiency and code quality, with readiness to share effective practices within the team; * strong communication skills and fluent English; * interest in life sciences or willingness to work in the domain. **It would be nice if you have:** * knowledge of biology or genetics; * experience with large datasets or analytical systems; * knowledge of Python; * experience with React.js. **Why Join Us:** * Solve complex technical challenges in a meaningful scientific domain. * Take high ownership and make a real impact on product direction. * Be part of an engineering\-driven culture with pragmatic decision\-making. * Grow technically while influencing system architecture. **We offer you:** * international team of professionals; * fully paid sick leaves; * onboarding and domain training for newcomers; * flexible work schedule.