Software Developer (.NET)
Offer summary

(Summary generated by AI based on the full job description)

The project supports a major European institution within a long-term engagement. Key technologies include .NET and UML, focusing on enterprise systems in asset and financial management. Responsibilities include system design and development, team leadership, optimization for security and quality, technical documentation, and 2nd and 3rd line technical support.

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Software Developer (.NET)

Company: OPTIVEUM SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ

from: 10 August 2026
to: 9 September 2026
200 - 200net (+ VAT)/ hr.B2B contract (full-time)
Salary details
basic salary
Offer parameters
level:mid • senior
working mode:remote • hybrid
location:Warszawa, Masovian
Warszawa, Masovian

Requirements

Expected technologies

UML

Operating system

Windows

Our requirements

  • 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).

Your 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.

About the project

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.

This is how we organize our work

This is how we work

at the client's siteyou focus on a single project at a timeyou develop several projects simultaneouslyyou have influence on the productyou focus on product developmentyou focus on code maintenanceagilescrum

This is how we work on a project

  • architect / technical leader support
  • team-level deployment
  • documentation
  • issue tracking tools
  • testing environments
Company

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

Benefits

  • remote work opportunities
  • integration events

OPTIVEUM SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ

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.

This is how we work

Software Developer (.NET)
200–200 zł / hr. (B2B)
I apply to:
OPTIVEUM SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ
Warszawa, Masovian
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