Aviation Software Engineer (Python)

🏢 Summary: Hybrid B2B opportunity to modernize a mission-critical aviation platform used globally. The role involves developing and maintaining C++ and C# software, improving platform components, reliability, and performance. 🗂️ Requirements: Professional experience with C++, Professional experience with C#, English proficiency at B2 level or higher 📃 Skills: C++, C# 🏢 Description: Join a team responsible for modernizing a mission-critical aviation platform used by tens of thousands of customers worldwide. This is a great opportunity to work on a solution that plays a key role in the aviation industry and contribute to its further technological development. Key responsibilities Develop and maintain software using C++ and C# Contribute to the modernization of the existing aviation platform Design, implement, and improve software components Collaborate with other members of the development team to deliver high-quality solutions Analyze technical requirements and translate them into effective software solutions Troubleshoot issues and contribute to improving the reliability and performance of the platform Ideal candidate profile Professional experience with C++ Professional experience with C# English proficiency at B2 level or higher Conditions Work model: Hybrid – 1 day per week at the office in Gdańsk Contract type: B2B. Rate: Negotiable Benefits: life insurance, private healthcare, Multisport card Recruitment steps Phone call with a Recruiter Online technical and recruitment interview with Client Decision and feedback W KUBO naprawdę zależy nam na ludziach. Zapraszamy osoby w różnym wieku, o różnych tożsamościach i sposobach funkcjonowania oraz niezależnie od sytuacji zdrowotnej i rodzinnej. Autentyczność jest dla nas wartością, a naszym celem jest uczciwy i otwarty proces dla wszystkich. At KUBO, we genuinely care about people. We welcome candidates of all ages, backgrounds, identities, family constellations, health situations, and ways of thinking and interacting with the world. You’re welcome to be yourself — we value authenticity, and we’re committed to creating a fair and inclusive process for everyone.

🏢 Summary: Senior Python Developer role in a fast-paced, startup-style environment, owning the design and delivery of high-load, data-intensive systems. The position partners directly with clients, leads complex features from architecture through automated deployment, and helps maintain high engineering standards. 🗂️ Requirements: 5+ years of commercial software development experience, Strong professional Python experience, Expertise in Python 3.11+, Production experience with modern Python frameworks, API design experience, Database and data-driven systems knowledge, Advanced OOP, SOLID, YAGNI and TDD knowledge, Unit testing, CI/CD, Docker and deployment experience, Ability to build low-latency, scalable systems, Very good written and spoken English, Ability to work under tight deadlines and evolving requirements 📃 Skills: Python, FastAPI, Falcon, SQLAlchemy, REST, GraphQL, pytest, Docker, CICD, OOP, SOLID, YAGNI, TDD 🏢 Description: Startup Environment, High Ownership, Demanding Clients Join our startup-like environment filled with new ideas, rapid change, and a strong focus on priorities and delivery. We are looking for a Senior Python Developer - someone experienced, open-minded, and ready to take real ownership of both product and technical direction. You will work closely with demanding clients , solve complex engineering problems, and help shape ambitious, high-performance systems. This role is for engineers who enjoy responsibility, fast feedback loops, architectural challenges, and working under pressure . Your primary responsibilities beyond the will to change the world: Act as a technical partner for clients : analyze business needs, challenge requirements, and propose effective, scalable solutions Take full ownership of complex features - from concept and architecture through implementation, testing, and automated deployment Design system architecture, APIs, and data models for high-load, data-intensive systems Deliver core and business-critical components of projects Work in a dynamic, startup-style environment with changing priorities, tight deadlines, and real product pressure Proactively identify risks, bottlenecks, and technical debt , and drive improvements Ensure high code quality, performance, and reliability Support and mentor other developers, helping raise engineering standards across teams Must have: 5+ years of commercial software development experience, including strong professional experience in Python Excellent knowledge of Python 3.11+ (typing, dataclasses, modern best practices) Production experience with modern Python frameworks ( async FastAPI preferred, Falcon welcome, Async SQLAlchemy 2.0 ) Strong expertise in API design (REST, GraphQL) Solid understanding of databases and data-driven systems (relational, document, search, key-value stores) Advanced knowledge of software engineering principles (OOP, SOLID, YAGNI, TDD) Extensive experience with unit testing (pytest), CI/CD pipelines, Docker, and deployments Proven ability to build efficient, low-latency, scalable systems Confidence working with tight deadlines, pressure, and frequently evolving requirements Very good written and spoken English Strong communication skills and a proactive, ownership-oriented mindset Experience we'd appreciate, too: Experience in system architecture and technical leadership Asynchronous programming and high-concurrency systems Messaging systems and distributed architectures DDD and event-driven design Cloud and DevOps experience ( AWS / Azure ) Mentoring and influencing technical direction of projects Nice to have: Community involvement (meetups, open source, speaking) Writing technical articles or internal knowledge-sharing A list of benefits is long so we will mention only about the crucial ones: Challenging projects with real business impact Work in a startup-like environment : fast decisions, autonomy, responsibility 100% remote or office in Poland (Wrocław / Zielona Góra) Sport subscription Private healthcare