Software Developer (.NET)

Software Developer (.NET) Lead end-to-end .NET development for mission-critical enterprise systems, guide technical teams, and shape secure, high-quality solutions in a long-term remote B2B role. Certificates required Software Developer (.NET) - Certified Software Developer (.NET) — own system design, lead technical teams, and drive end-to-end development. Far-site remote, 200 PLN net/h B2B. IT · Multiple locations · Fully Remote About the Client and our Role At Optiveum, we connect top IT professionals with exciting tech initiatives. In this case, we are the recruitment partner acting within the TimeDev Framework Agreement to provide outsourcing consultants for our partner organization . By taking part in this long-term project, you will be contributing as a Software Developer to support a major European institution. The Role We are looking for a Software Developer (.NET) to take an active role in designing, building, and optimizing enterprise-level software systems. In this position, you will lead development initiatives, implement robust solutions across data, business logic, and UI layers, and ensure software meets stringent security, performance, and quality standards. You will work closely with other technical teams to prototype solutions and support complex enterprise frameworks. Responsibilities Design and develop the system, translating requirements into technical design. Lead development teams and set software development standards. Design applications using UML and optimize software for performance, security, and quality. Propose technical solutions for business needs and solve complex technical problems. Estimate effort and time for development. Produce technical documentation and effectively document developments. Manage configuration, releases, and collect/interpret software metrics. Contribute to requirements analysis, testing, quality assurance, change management, and deployment. Test solutions, develop testing tools, and prototype new features. Act as 2nd and 3rd line technical support. Expectations Experience: Minimum 4 years of overall IT-relevant professional experience, including at least 2 years of project experience relevant to the profile (or in a similar position). Specific Domain Expertise: At least 2 years of experience with mission-critical complex enterprise systems, specifically including asset and/or human resources management, as well as financial management. Technology Stack: Expert in developing enterprise-level software systems in the .NET technology domain . Technical Skills: Proficient in designing and developing the data layer, business logic layer, and UI layer. Strong knowledge of UML and ability to design applications in UML. Completion of at least 1 full lifecycle of a software solution. Process & Leadership: Experience working in Scrum developments, capable of leading technical teams, and strong problem-solving skills. Language: Fluent English (minimum B2 level / CEFR). Education (Level 6): Minimum Bachelor’s degree (or 3 years of higher education confirmed by a diploma). An ICT-relevant degree is mandatory. Certifications Requirements You must possess at least one of the following: An Intermediate level certificate in software development relevant to the domain (.NET). An equivalent internationally recognized certification (subject to acceptance as a valid credential by the Contracting Authority). What We Offer Salary: max 200 net / hour. Contract Type: B2B agreement. Type of Work: Remote with ocassional visits to the client HQ in Warsaw, Poland Specjalizacja / specialism IT Locations Multiple locations Remote status Hybrid About OPTIVEUM sp. z o.o. Optiveum is a recruitment and consulting company created based on our 20-plus years of experience in HR & IT services. We work for Clients located in Poland and abroad providing our local and international Candidates with Project-based or Permanent job opportunities in a remote or office-based model. COMPANY DATA Optiveum Sp. z o.o. ul. Tomasza Zana 43 lok. 2.1 20-601 Lublin, Poland nr KRS: 0000834436, NIP 7010975729 Contact us at: info (at) optiveum.com