Senior C++ Developer

🏢 Summary: Backend Java role focused on developing and maintaining scalable Spring applications, REST APIs, and microservices. The offer includes testing, Linux/Unix operations, Docker and basic Kubernetes deployment support, with an employment contract, flexible work arrangements, and benefits. 🗂️ Requirements: 3+ years of Java development experience, Java 8+, Spring Framework, RESTful services, Linux/Unix and Bash scripting, Docker, Basic Kubernetes usage, Unit and integration testing, Software design patterns, Clean code principles, English B2+, Independent, ownership-driven work 📃 Skills: Java, Spring, REST, Linux, Unix, Bash, Docker, Kubernetes, Testing, Jenkins, MongoDB, JMS, ActiveMQ, JIRA, C, C++ 🏢 Description: Who are we? Lufthansa Systems Poland is acclaimed and widely recognized provider of superior services and IT solutions for the aeronautical, logistic and financial industries. As a part of the Lufthansa Group we implement technological solutions and dedicated services. Who are you? Your profile: Minimum 3+ years of experience as a Java Developer. Strong knowledge of Java 8+ and Spring Framework. Experience in building RESTful services Good understanding of Linux/Unix environments and Bash scripting. Experience with Docker and basic Kubernetes usage. Experience in writing unit and integration tests. Knowledge of software design patterns and clean code principles. Good English communication skills (B2 or higher). Ownership mindset and ability to work independently Good knowledge of Linux/Unix systems and shell usage. What do we welcome? Experience in C/C++ Experience working in Unix/Linux environments. Experience with MongoDB or other NoSQL databases. Working knowledge of CI/CD tools (e.g., Jenkins). Experience building RESTful services and APIs. Familiarity with messaging systems such as JMS and ActiveMQ. Experience working in Agile/Scrum environments. Familiarity with JIRA or similar issue-tracking tools. Why do we need you? You will be responsible for: Design, develop, and maintain scalable backend applications using Java (8+) and Spring Framework Build and enhance RESTful APIs and microservices ensuring high performance and reliability Write clean, maintainable, and efficient code following clean code principles and design patterns Develop and execute unit and integration tests to ensure software quality Work with Docker containers and support deployments in Kubernetes environments (basic level) Operate and troubleshoot applications in Linux/Unix environments, including writing and maintaining Bash scripts Collaborate with cross-functional teams (QA, DevOps, Product) to deliver high-quality solutions Take ownership of features and components, working independently when needed Participate actively in code reviews and technical discussions Communicate effectively in English in an international environment What we can offer? An international working environment, atmosphere that stimulates development, Individual career path, Lufthansa Group membership benefits, Employment Contract, Salary in the range of 8 000 - 21 000 zł gross Flexible working time and place adjusted to employee’s needs. Possibility of starting your workday between 07:00 and 11:00, Workplace adjusted to employee's needs, Support for your passion for sports within the local activity group and co-financing Multisport cards, Private medical care for employees and their family members. Life insurance. Modern office in Oliwa – great location and comfortable workspace.

🏢 Summary: Senior frontend/full-stack developer role focused on building resilient, enterprise-ready product features for a sports and health platform. The position involves React, TypeScript, Next.js, REST APIs, PostgreSQL, and close remote collaboration, with a hybrid schedule in Kraków. 🗂️ Requirements: 5+ years of professional development experience, Production experience with React and TypeScript, Production experience with Next.js App Router, REST API and data-validation experience, PostgreSQL and ORM experience, Ability to follow architectural documentation and team conventions, Git, code review, and Jira experience, Independent problem analysis and written feature planning/ADRs, Careful handling of healthcare data, schemas, and access logic, Strong written technical communication, Remote and asynchronous collaboration skills, Advanced English, Ability to complete a technical coding test without assistance, Availability to start within one month, Ability to work from the Kraków office 3 days per week 📃 Skills: React, TypeScript, Next.js, REST, Zod, PostgreSQL, Drizzle, Prisma, TypeORM, Git, Jira, Claude 🏢 Description: About the role You will be assisting in the understanding of, architecture, implementation, and quality of core Product Roadmap items intended to drive the project for our client forward. The ability to work with the team and collaborate is essential. You will have an immediate impact and be an early figure in the company today to help drive our growth. You will focus on solidifying our product and making it resilient as well as learning how to roll out enterprise-ready features. Required skills /knowledge and production experience/ React + TypeScript Next.js (App Router) — routing, server/client components, API routes REST API, data validation (example - Zod) PostgreSQL and ORM (Drizzle or similar — Prisma/TypeORM) Work according to the team's conventions and architectural documentation(ADR-y) — the ability to read and follow established standards before writing code Git, code review, ticketing (Jira) Coding with Claude /on daily basis/ Minimum of 5 years of professional experience developer with hands-on skills. Communication and other required skills Git, code review, ticketing (Jira) Independence in problem analysis and a willingness to plan before implementation (the project requires a written plan/ADR before each new feature). Accuracy and attention to detail—working with healthcare data requires caution when changing the schema and access logic. Good written communication—documentation, PR descriptions, tickets, and code review comments. Comfortable working in a distributed/remote team and asynchronous communication. Openness to feedback and a willingness to propose simpler solutions instead of over-engineering (the project explicitly avoids over-engineering). Sense of responsibility (ownership) for the delivered functionalities from design to implementation. Advanced English - hard must - daily calls with native CTO or CEO(weekly) . Ability to discuss technical problems, describe concept, architecture or planned feature. There's going to be (online or onsite in Krakow) technical coding test (without extra help) and English general and/or tech conversation. Awesome but not a must: Supabase (Auth, RLS, Postgres) AWS: S3, SQS, Lambda - designing or integrating with data processing pipelines (multipart upload, task queuing, workers) Terraform / IaC - ability to read infrastructure definitions (no need to write them yourself) Working with video / media data / large-volume files (e.g., recording processing, LiDAR, wearable data) Designing permission systems (RBAC) for multiple user roles OpenAPI / API contracts, documenting endpoints Experience in health, sports, telemedicine, or other sensitive/regulated data Application observability (Sentry, PostHog, or similar) Real-time integrations (chat/video SDKs like CometChat, WebSocket) Our benefits: Awesome and highly intense product /sports and health/ Private medical care and multisport card Flexible working hours (you can start between 8:00 -10:00 a.m.) Your choice of computer: Mac OS/Linux/Windows Upskilling budget English discussion classes every week Parking spot few mins from office Employee recommendation program. 🟢 The office is based in Kraków. We work 3 days from the office a week. 🟢 The process consists of 2 stages. We recruit remotely :) Ideal candidate should start within a month (no longer).

🏢 Summary: Full-stack Software Engineer role focused on improving the end-to-end travel-claiming journey, from frontend and backend delivery to experimentation, integrations, and production reliability. The hybrid position in Kraków or Gdańsk offers employment or B2B compensation and ownership of high-impact features used by millions of travellers. 🗂️ Requirements: 4+ years building client-facing production applications, Proficiency in TypeScript/React, Ruby/Rails, or Node.js, Willingness to work across the full stack, Experience with the full delivery lifecycle, Relational database experience, English communication skills 📃 Skills: TypeScript, React, Ruby, Rails, Node.js, PostgreSQL, AWS, Docker, Kubernetes, Terraform, ELK, Grafana, Sentry, GitHub, Bruno, Playwright, k6, Vite, Turborepo, Zod 🏢 Description: AirHelp is a global travel tech company on a mission to make every journey smoother. We built our name helping millions of travellers claim the flight compensation they're owed - and that's now the foundation of a broader platform of travel protection and convenience products spanning the entire journey. We are looking for a product-minded Full-stack Software Engineer to join our Claiming Experience team, responsible for the journey that helps travellers start, complete, and submit their claims with confidence. It's one of the highest-leverage surfaces in the company. What happens here moves submission rates, traveller trust, and the cost and speed of everything that happens downstream - legal, documents, operations, comms. Small wins compound. The claiming journey is a real product problem that happens to span frontend, backend, experimentation, document and signature flows, legal requirements, partner integrations, and production reliability. You'll own meaningful parts of it end to end, working day to day with engineers, PMs, designers, data analysts, and QA. This is a hybrid role based in Kraków or Gdańsk. Salary: If you join us as a full-time employee: 14.000 - 20.000 PLN gross/month If you join us as a contractor (for specific projects): 15.000 - 25.000 PLN net + VAT on a B2B contract What you can expect from us Opportunity to build high-leverage features and tooling for the core business domains that directly impact the travel experience for millions of users. Culture that promotes good engineering practices, high-quality code, and continuous improvement. Daily deployments to production, ensuring fast impact and iterative development. Access to a modern tech stack and a variety of functional areas, including: Backend: : Node.js and Ruby on Rails Frontend: TypeScript-first React ecosystem (Vite, Turborepo, TanStack Query/Table, Zod) Databases: PostgreSQL Infrastructure:  AWS, Docker, Kubernetes, Terraform. Monitoring: ELK/Grafana, Sentry, GitHub Actions CI/CD Testing: Bruno (API), Playwright (E2E), k6 (performance) What you'll achieve: Build and evolve the core claiming flows, across frontend and backend, all the way to production. Work with Product, Design, and Data to spot friction, frame the problem, and ship measurable improvements. Design and run experiments that lift submission rates and reduce confusion and make it easier and safer for the whole team to do the same. Integrate the claiming flow with the systems around it: documents, comms, claim processing, partner APIs, internal tooling. Modernise the legacy parts of the journey so the team can move faster with less risk. Raise the bar on reliability and observability for these flows, so we catch and fix issues before they cost a traveller their claim. Hold the line on engineering quality through reviews, testing, and pragmatic technical decisions. Use AI-assisted workflows where they genuinely speed you up or improve the work. A year in, you'll have measurably improved how many eligible travellers complete their claims, made experimentation faster and safer, and simplified enough of the codebase that the team ships with more confidence than it does today. What sets you apart: 4+ years building and owning client-facing production apps where reliability, performance, and conversion actually matter. Strong in at least one of our core technologies: TypeScript/React, Ruby/Rails, Node.js and willing to work across the stack. A product instinct: you care whether the code solved the right problem, not just whether it shipped. Comfortable across the full lifecycle: framing, building, testing, deploying, monitoring, iterating with the testing discipline to back it. Solid with relational databases, ideally PostgreSQL. An ownership mindset: you go looking for the important problems instead of waiting for a perfect ticket. Clear communicator in English, written and spoken. Why AirHelp Fast Impact: We deploy daily - your code reaches millions quickly. Autonomy: High trust, zero politics. We hire builders, not order takers. Growth: Learning days, personal development plans, workshops, mentorship, and language classes. Perks: Private healthcare, non-service days, wellness budget, travel stipend, gym/transport subsidy, free access to AirHelp services, and more. At AirHelp, we're on a mission to make the world of travel better. Since our foundation in 2013, we've assisted over 2.7 million passengers in receiving their rightful compensation, and we've protected over 9 million travelers through our membership program, AirHelp+. With a global team of 400 AirHelpers speaking 19 languages, we aim to provide a stress-free travel experience for all. Our commitment extends to standing up to airlines in court and advocating fair air passenger rights through APRA. And there’s more! AirHelp isn’t just a great company, but a truly lovable place to work. That's why we're so proud to have been named a , also for LGBTQ+, women and young professionals. Our offices are fully accessible, and we customize interviews to accommodate special needs, including those of neurodiverse candidates. Refugees and displaced individuals are encouraged to apply. We look forward to hearing from you!

🏢 Summary: Full-stack Software Engineer role focused on improving end-to-end flight-claiming journeys, from frontend and backend development through experimentation, integrations, and production reliability. The offer includes hybrid work in Kraków or Gdańsk, daily production deployments, and PLN 14,000–20,000 gross/month employment or PLN 15,000–25,000 net + VAT B2B compensation. 🗂️ Requirements: 4+ years building and owning client-facing production applications, Strong TypeScript/React, Ruby/Rails, or Node.js experience, Willingness to work across the full stack, Experience with the full delivery lifecycle: building, testing, deploying, monitoring, and iterating, Relational database proficiency, English communication skills, written and spoken 📃 Skills: TypeScript, React, Ruby, Rails, Node.js, PostgreSQL, AWS, Docker, Kubernetes, Terraform, ELK, Grafana, Sentry, GitHub, Bruno, Playwright, k6, Vite, Turborepo, Zod 🏢 Description: AirHelp is a global travel tech company on a mission to make every journey smoother. We built our name helping millions of travellers claim the flight compensation they're owed - and that's now the foundation of a broader platform of travel protection and convenience products spanning the entire journey. We are looking for a product-minded Full-stack Software Engineer to join our Claiming Experience team, responsible for the journey that helps travellers start, complete, and submit their claims with confidence. It's one of the highest-leverage surfaces in the company. What happens here moves submission rates, traveller trust, and the cost and speed of everything that happens downstream - legal, documents, operations, comms. Small wins compound. The claiming journey is a real product problem that happens to span frontend, backend, experimentation, document and signature flows, legal requirements, partner integrations, and production reliability. You'll own meaningful parts of it end to end, working day to day with engineers, PMs, designers, data analysts, and QA. This is a hybrid role based in Kraków or Gdańsk. Salary: If you join us as a full-time employee: 14.000 - 20.000 PLN gross/month If you join us as a contractor (for specific projects): 15.000 - 25.000 PLN net + VAT on a B2B contract What you can expect from us Opportunity to build high-leverage features and tooling for the core business domains that directly impact the travel experience for millions of users. Culture that promotes good engineering practices, high-quality code, and continuous improvement. Daily deployments to production, ensuring fast impact and iterative development. Access to a modern tech stack and a variety of functional areas, including: Backend: : Node.js and Ruby on Rails Frontend: TypeScript-first React ecosystem (Vite, Turborepo, TanStack Query/Table, Zod) Databases: PostgreSQL Infrastructure:  AWS, Docker, Kubernetes, Terraform. Monitoring: ELK/Grafana, Sentry, GitHub Actions CI/CD Testing: Bruno (API), Playwright (E2E), k6 (performance) What you'll achieve: Build and evolve the core claiming flows, across frontend and backend, all the way to production. Work with Product, Design, and Data to spot friction, frame the problem, and ship measurable improvements. Design and run experiments that lift submission rates and reduce confusion and make it easier and safer for the whole team to do the same. Integrate the claiming flow with the systems around it: documents, comms, claim processing, partner APIs, internal tooling. Modernise the legacy parts of the journey so the team can move faster with less risk. Raise the bar on reliability and observability for these flows, so we catch and fix issues before they cost a traveller their claim. Hold the line on engineering quality through reviews, testing, and pragmatic technical decisions. Use AI-assisted workflows where they genuinely speed you up or improve the work. A year in, you'll have measurably improved how many eligible travellers complete their claims, made experimentation faster and safer, and simplified enough of the codebase that the team ships with more confidence than it does today. What sets you apart: 4+ years building and owning client-facing production apps where reliability, performance, and conversion actually matter. Strong in at least one of our core technologies: TypeScript/React, Ruby/Rails, Node.js and willing to work across the stack. A product instinct: you care whether the code solved the right problem, not just whether it shipped. Comfortable across the full lifecycle: framing, building, testing, deploying, monitoring, iterating with the testing discipline to back it. Solid with relational databases, ideally PostgreSQL. An ownership mindset: you go looking for the important problems instead of waiting for a perfect ticket. Clear communicator in English, written and spoken. Why AirHelp Fast Impact: We deploy daily - your code reaches millions quickly. Autonomy: High trust, zero politics. We hire builders, not order takers. Growth: Learning days, personal development plans, workshops, mentorship, and language classes. Perks: Private healthcare, non-service days, wellness budget, travel stipend, gym/transport subsidy, free access to AirHelp services, and more. At AirHelp, we're on a mission to make the world of travel better. Since our foundation in 2013, we've assisted over 2.7 million passengers in receiving their rightful compensation, and we've protected over 9 million travelers through our membership program, AirHelp+. With a global team of 400 AirHelpers speaking 19 languages, we aim to provide a stress-free travel experience for all. Our commitment extends to standing up to airlines in court and advocating fair air passenger rights through APRA. And there’s more! AirHelp isn’t just a great company, but a truly lovable place to work. That's why we're so proud to have been named a , also for LGBTQ+, women and young professionals. Our offices are fully accessible, and we customize interviews to accommodate special needs, including those of neurodiverse candidates. Refugees and displaced individuals are encouraged to apply. We look forward to hearing from you!

🏢 Summary: Senior QA role focused on manual and automated testing of web applications and backend services. The offer involves building Playwright automation, validating cross-browser and API quality, and collaborating across the agile development lifecycle. 🗂️ Requirements: 5+ years of software QA experience, Manual and automated testing experience, Playwright automation experience, Cross-browser testing experience, JavaScript, TypeScript or React knowledge, REST API validation experience, Go backend understanding, CI/CD integration experience, Analytical, problem-solving and communication skills, Attention to detail, English resume 📃 Skills: Playwright, BrowserStack, JavaScript, TypeScript, React, REST, Postman, curl, Go, CI/CD 🏢 Description: About the company We are an e-commerce platform in Poland and a network of travel agencies offering a wide range of travel products. We are part of Wirtualna Polska Holding – Poland’s largest group of media and e-commerce companies. Alongside Wakacje.pl and the Invia brands, we scale our impact across the CEE market, driven by a shared #TravelMindset. In our daily work, we #Explore better ways to grow, #Engage through real ownership and teamwork, and #Enjoy building experiences that people genuinely look forward to. Send us your CV and… see you at Travelplanet.pl ! ✈️ Key responsibilities: Design, implement, and execute manual and automated test cases for web and backend services Develop and maintain automated test scripts using tools like Playwright Perform cross-browser and cross-device testing using platforms such as BrowserStack Collaborate closely with developers, product managers, and designers to ensure quality throughout the SDLC Identify, log, and track bugs, and proactively drive root-cause analysis and resolution Contribute to continuous improvement of QA processes, test coverage, and automation practices Analyze requirements and specifications to ensure testability and identify potential quality risks early Participate in code reviews and provide input on testability and test coverage Self-organized, detail-oriented, and comfortable working in an agile environment Strong communication skills and a collaborative mindset Required Qualifications: 5+ years of experience in software quality assurance , with a focus on both manual and automated testing. Strong hands-on experience with test automation tools and frameworks, particularly Playwright Experience with cross-browser testing, including platforms such as BrowserStack or similar tools. Solid knowledge of programming/scripting languages /frameworks (e.g.,  JavaScript, Typescript, React) Strong manual testing skills , including exploratory, regression, and edge case testing. Familiarity with RESTful APIs and tools like Postman or curl for API-level validation. Basic understanding of Go-based backends to support test design and troubleshooting. Experience with CI/CD pipelines and integrating automated tests into the development workflow Excellent analytical, problem-solving, and communication skills A passion for quality and a strong attention to detail We offer: Competitive Salary : commensurate with skills and experience Paid time off: is included in the service fee Flexible Working Hours : Our core hours are 9 AM to 3 PM Hybrid Work Model: Work 2 days in the office and 3 days from home Health and Wellness: Shared costs for sports activities and private medical care Life Insurance : Comprehensive coverage for peace of mind Employee Discounts: Access to corporate products and services at discounted prices If the above sounds like an interesting opportunity we would be more than happy to hear from you! Please send your resume in English.

🏢 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.