Software Engineer .NET

DESCRIPTION Would you like to leave your mark in the truly booming cloud-native & fin-tech industry? Would you like to show your ideas and bring them to life?     Ohpen is on the lookout for a skilled Engineer to join the team and help us build and maintain the product and its applications. There is where you come into the picture! BRIEFING We're not looking for just another Java developer. We want someone who has internalized the discipline of languages like Rust, C++, and Haskell — ownership semantics, zero-cost abstractions, fearless concurrency, algebraic types, immutability-by-default — and brings that rigour to a production Java codebase. You'll join one of our self-governing squads Bratislava or Zilina that owns its domain end-to-end in a cloud-native fintech platform. Most architectural decisions are made inside the squad, so your opinions on correctness, performance, and code design actually matter here. The daily language is Java 21+ / Spring Boot, but the way you think about the code is what sets you apart. As English is our primary working language, we expect candidates to communicate fluently in English at a professional level. We also value a willingness to work with AI technologies.  ABOUT YOU * 5+ years of professional backend experience, with meaningful time spent in at least one of: Rust, C++, Haskell — or demonstrable deep knowledge of their core principles * Strong, opinionated understanding of memory models, ownership, type systems, and functional programming concepts * Production fluency in Java (17+) and Spring Boot — or the confidence to ramp up quickly given your systems background * Experience with or genuine interest in AWS, Terraform, and delivery automation * Comfortable communicating daily in English

DESCRIPTION Do you think like an engineer first and a “language specialist” second?    Are you the kind of person who loves to experiment, challenge tools (including AI), and find better ways to build software – even if it means learning something completely new?  If you enjoy going the extra mile, playing with ideas and turning them into robust solutions, we’d love to talk to you. BRIEFING You’ll join our Mid‑office team, where complex mortgage and credit decisions are turned into services and APIs that drive real‑world outcomes for our customers.  Your role would be to understand how the pieces fit together: how services interact, how data flows through our platform, and how design choices affect reliability and customer experience.  You’ll be designing and improving components in a cloud native core banking environment and help us keep systems understandable and maintainable over time.  AI will be one of your tools: you’ll use it to explore options, generate code snippets or tests, and speed up routine work, but you’ll always stay in the driver’s seat, by deciding when AI’s suggestions need to be challenged or refined.  This role is for someone who enjoys analyzing problems, forming a clear vision of the solution, and then using both their own skills and AI‑powered tools to bring that vision to life. You’ll collaborate closely with other engineers and product colleagues, discuss trade‑offs, and help us move from “incremental evolution” to genuine “revolution” in how we design and operate our Mid‑office services. ABOUT YOU * You understand code and system architecture beyond syntax: you can reason about how components are structured, how they communicate, and how changesimpactthewhole system. * You are open‑minded and curious, and youdon’thesitate to learn something new when it helps you build a better solution. * You are comfortable using AI as a collaborative tool – crafting precise prompts, explaining clearly what you need, and evaluating AI‑generated output against your own standards. * You enjoy discussing ideas, challenging assumptions (including those made by AI) ! If this role resonates with you, and you enjoy trying new things, you’re welcome (but not required) to send us a short video where you show or tell whatever best captures how you think about code, systems and using AI as your teammate.