.Net Developer
Offer summary

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

The project focuses on developing and implementing IT systems for a financial institution. Technologies used include C#, .NET 4.5, WCF, SQL Server, SSIS, MVC .NET, JavaScript, jQuery, HTML5, and CSS3. Main responsibilities involve solution design, collaboration with business users, software testing, and system documentation. Tasks include data quality improvement and requirements analysis. B2B contract with a rate up to 120 PLN/h.

from: 1 September 2026
to: 1 October 2026
120 - 120net (+ VAT)/ hr.B2B contract (full-time)
Salary details
basic salary
Offer parameters
level:senior
working mode:hybrid
location:Warszawa, Masovian
Warszawa, Masovian

Requirements

Expected technologies

.NET
C#
Microsoft SQL Server
JavaScript
jQuery
jQuery UI
HTML
.CSS
Visual Studio

Optional technologies

PL/SQL
Oracle
Sparx
Enterprise Architect
UML

Operating system

Linux

Our requirements

  • A minimum of 3 years of programming experience using C#, .NET (including 4.5), WCF, SQL, SQL Server Integration Services (SSIS), HTML, and MVC .NET
  • Proficiency in JavaScript, jQuery, jQuery UI, HTML5, and CSS3.
  • Familiarity with the Visual Studio Ultimate 2013 environment.
  • Solid experience in developing web applications.
  • Knowledge of unit testing and test automation processes.
  • Strong understanding of design patterns and Object-Oriented Programming (OOP) principles.
  • Practical experience designing and developing IT systems for the financial sector or organizations of similar complexity.
  • Strong analytical thinking skills with the ability to precisely define business and system requirements.
  • Excellent communication and negotiation skills for effective collaboration with business clients, internal teams, and external suppliers.
  • High degree of independence, strong goal orientation, and great organizational skills.
  • Native Polish and Advanced English, enabling seamless work with technical documentation.

Optional

  • Basic understanding of UX design principles.
  • Familiarity with Agile and XP methodologies.
  • Knowledge of PL/SQL and Oracle databases.
  • Practical experience with at least one CASE tool (e.g., Sparx Systems Enterprise Architect) and UML.
  • Experience working in a matrix organization and knowledge of ITIL.

Your responsibilities

  • Designing and implementing IT systems, including Oracle-based solutions.
  • Collaborating with business end-users to gather and analyze requirements, specifically detailing broad business concepts into actionable tasks.
  • Actively participating in internal software testing.
  • Creating and updating technical and functional system documentation.
  • Collaborating on the development of new solutions and shaping technical directions.
  • Implementing data quality improvements in systems and applications exporting data to the data warehouse.
  • Reviewing technical specifications and project documentation provided by third-party external vendors.

About the project

We are looking for an experienced .NET Developer to join the team of our client—a prominent and stable financial institution.
Please note: Optiveum acts as the recruitment partner and the direct contracting party for this role. The successful candidate will sign a B2B cooperation agreement directly with us.

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

  • A highly competitive rate of up to 120 PLN/h net.
  • A flexible hybrid work environment (75% remote) with occasional visits to the Warsaw office.
  • A technologically engaging project within a highly stable industry.
  • A transparent and direct B2B contract signed seamlessly with Optiveum.
  • Full professional support from our team throughout the recruitment process and your contract duration.

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

.Net Developer
120–120 zł / hr. (B2B)
I apply to:
OPTIVEUM SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ
Warszawa, Masovian
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