Senior Fullstack Developer (.NET + React)

At intive we innovate through design and engineering to create people-centric digital products. We are +2000 people with a passion for digital, who partner with the world’s leading brands such as Dow Jones, FOX, Warner Bros., Verizon, Macmillan, Facebook, Google, BMW, BlackBerry, Discovery, and more.

Our clients come to us to solve their biggest and the most complex business and technology challenges. We have over 20 years of experience working with companies across many industries, including Media & Entertainment, EdTech, Telecommunications, Retail, Automotive, FinTech, and Transportation.

Are you a cloud infrastructure expert looking for your next challenge? Join our team as a Senior Fullstack Developer (.NET + React) and help us build resilient, scalable, and secure cloud solutions. You will work closely with our tech leads, collaborate with cross-functional teams, and mentor junior colleagues while driving cloud excellence.

What you will be doing:

• Develop enterprise-level web applications focusing on scalability, performance, and security.
• Implement and develop CI/CD tooling.
• Write efficient queries, stored procedures, and perform database optimization using SQL Server.
• Design intuitive and customer friendly user interfaces using React.
• Work with customers and support colleagues to troubleshoot customer issues.
• Follow development processes and use collaborative tooling to deliver work as part of a team
• Stay up to date with emerging technologies and industry trends to continuously improve development practices.
• Participate in technical reviews of Requirements; Design specifications and source code.
• Design testing methods and test completed programs and procedures for accuracy and completeness ensuring system requirements are met.
• Prepare activity and progress reports regarding project activities.
• Develop new solution or modifications from limited verbal and written direction performing the necessary analysis to develop detailed specifications.
• Act as a guide and mentor for junior members of the development team.

You are a good match if you have:

• Proven experience in software development of ideally on multi tenanted web applications.
• Proficient in C# .NET
• Proficiency with web frontend development (HTML, CSS, Javascript, REACT)
• Understanding of web accessibility and considerations around responsive web applications.
• Comfortable with database usage, development and optimisation in T-SQL
• Experience working in live customer environments.
• Attention to detail to ensure high-quality, error-free code.
• Ability to write and run meaningful unit tests.
• Experience of working with supporting applications/services, managing dependencies and avoiding breaking changes

You get extra points for:

• Prior work with Booking / Venue Management solutions
• Prior work with React Admin framework
• Experience of Containerisation and CI/CD pipelines.
• Experience of Agile development practices

What we value:

• A proactive, problem-solving mindset with the ability to work independently.
• Strong communication skills and the ability to collaborate across teams.
• A passion for continuous learning and knowledge sharing.
• A results-driven approach with a focus on delivering high-quality solutions.

Why intive?

We foster an environment where innovative ideas and excellence can thrive - both on-site and remotely. Our learning culture rewards curiosity and empowers our team members to learn, grow, and take charge of their careers.

• Remote Work, Flexibility & Balance – Hybrid work. You are welcome but not required at our offices. We have flexible benefits (pyszne.pl vouchers, mobile phone, data subscription by modem or cash benefit). You choose your contract type (UoP or B2B) and equipment (MacBook or Dell).
• Performance management - Regular partnership meetings between each employee and a manager. You can create a career path based on your goals. We provide training, mentoring, and support to help you along the way.
• Training & Mentorship - Learning and development are an important part of our corporate culture. You will have access to learning activities (courses, conferences, language classes, Udemy licences, Team Lead training program) tailored to your individual performance and development needs and goals.
• Tech Hubs – You become part of a community of colleagues who share your interests. There is room for internal exchange and access to the latest technologies.
• Culture & Connection - We foster connections within our teams, as well as across areas of responsibility and hierarchical levels. We make sure everyone is appreciated and feels connected to our mission and each other. We arrange bonding events for our employees and their children.
• Benefits offer - available for you and your family members: Medicover + More Smile Package, Multisport, Group Insurance, Sport Subsidy.

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