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Senior Full-Stack Software Engineer (.NET, Vue.js) at Exadel Inc (Website). . Location: Poland. Why Join Exadel. . We’re an AI-first global tech company with 25+ years of engineering leadership, 2,000+ team members, and 500+ active projects powering Fortune 500 clients, including HBO, Microsoft, Google, and Starbucks.. . From AI platforms to digital transformation, we partner with enterprise leaders to build what’s next.. . What powers it all? Our people are ambitious, collaborative, and constantly evolving.. . About the Client. . UK-based provider of digital survey solutions. Launched in 2010, the company has rapidly grown into one of the leading online survey platforms in the UK and Europe.. . What You’ll Do. . . Engineer, design and estimate solutions for new feature requests together with the product team. . Decide on the best approach for implementation (mostly backend-end and basic front-end solutions). . Review pull-requests from others to ensure high quality and maintainable solutions. . Coach other team members and elevate their technical skills. . Implement APIs and integrations with external services. . Write unit and integration tests. . Diagnose and fix bugs and performance bottlenecks. . Follow up on new evolutions of technology and take the initiative to keep the stack up to date. . . What You Bring. . . 6+ years of professional software development experience, with a strong focus on back-end and exposure to front-end solutions. . Strong experience with C# and the .NET framework. . Knowledge of VB.NET (experience maintaining legacy applications is a plus). . Solid understanding of REST APIs, web services, OAuth, JSON, and SQL databases. . Experience with software engineering best practices, including object-oriented design, design patterns, testing, and secure coding (OWASP). . Familiarity with agile methodologies, preferably SCRUM. . Competence in reviewing code and mentoring team members. . Understanding of deployment processes and CI/CD pipelines. . Basic knowledge of front-end technologies such as Vue.js, JavaScript, TypeScript, HTML, and CSS. . . Nice to Have. . . An eye for UI/UX design and the ability to collaborate effectively with front-end developers. . Experience leading significant features or projects from architecture through delivery. . . English level. . Intermediate. . Legal & Hiring Information . . . Exadel is proud to be an Equal Opportunity Employer committed to inclusion across minority, gender identity, sexual orientation, disability, age, and more. . Reasonable accommodations are available to enable individuals with disabilities to perform essential functions. . Please note: this job description is not exhaustive. Duties and responsibilities may evolve based on business needs. . . Your Benefits at Exadel  . . Exadel benefits vary by location and contract type. Your recruiter will fill you in on the details.. . . International projects. . In-office, hybrid, or remote flexibility. . Medical healthcare. . Recognition program. . Ongoing learning & reimbursement . . Well-being program. . Team events & local benefits . . Sports compensation . . Referral bonuses . . Top-tier equipment provision. . . Exadel Culture. . We lead with trust, respect, and purpose. We believe in open dialogue, creative freedom, and mentorship that helps you grow, lead, and make a real difference. Ours is a culture where ideas are challenged, voices are heard, and your impact matters.