Software Engineer (.NET)

Fujitsu; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Job summary

Fujitsu is seeking an experienced software professional to join our global team. You will design and develop enterprise web applications using .NET Core, C#, React, and SQL Server, while guiding 2nd/3rd line support and deployment through modern pipelines.

You will lead technical teams, establish coding standards, and ensure quality through testing and security tools like Checkmarx. The role requires UML design, Scrum practices, and strong problem-solving and documentation skills.

Qualifications

• Lifecycle experience through the complete software solution lifecycle.
• Expert-level capability in developing enterprise software within the specified technology domain.
• Proficient in UML application design and in designing data, business logic, and UI layers.
• Practical experience with Scrum agile development frameworks.
• Ability to lead technical development teams.
• Ability to document technical solutions and solve problems.

Responsibilities

• Designs and develops systems, prototypes solutions, and translates user and business requirements into functional designs.
• Leads development teams, sets software development standards, and estimates effort and development timelines.
• Optimizes software for performance, security, and quality while collecting and interpreting metrics.
• Proposes technical solutions to address business needs and complex technical problems.
• Produces comprehensive technical documentation and documents all development activities.
• Contributes to requirements analysis, system testing, quality assurance, change management, and deployment processes.
• Manages software configurations and releases; acts as 2nd/3rd line support.
• Tests solutions and develops dedicated testing tools.

Skills

Lifecycle Experience

Domain Expertise

Design Proficiency

Scrum

Team Leadership

Documentation & Problem Solving

Education

Bachelor's Degree

Tools

.NET (Core / 8)

C#

Entity Framework

SQL Server

React/TypeScript

Azure DevOps Pipelines

Windows/IIS

Nutanix / OpenShift

Hangfire

ASP.NET Core Data Protection

Checkmarx

SAML 2.0 / Entra ID

Job description

Education Requirement:

Bachelor's Degree

Company Description

Fujitsu is a global leader in digital services, transforming organizations and the world through innovation. With a commitment to sustainability, Fujitsu builds trust in society by leveraging cutting-edge technology and innovation. Our services aim to drive positive change and create lasting impact in various industries globally.

DESCRIPTION OF THE TASKS

The external service provider will perform the following typical tasks and responsibilities:

• System Development & Design: Designs and develops systems, prototypes solutions, and translates user and business requirements into functional designs.
• Technical Leadership: Leads development teams, sets software development standards, and estimates effort and development timelines.
• System Optimization: Optimizes software from performance, security, and quality perspectives while collecting and interpreting software metrics.
• Problem Solving: Proposes technical solutions to address business needs and complex technical problems.
• Documentation: Produces comprehensive technical documentation and documents all development activities.
• Lifecycle Support: Contributes to requirements analysis, system testing, quality assurance, change management, and deployment processes.
• Operations & Support: Manages software configurations and releases while acting as 2nd and 3rd line support.
• Quality Control: Tests solutions and develops dedicated testing tools.

KNOWLEDGE AND SKILLS

The candidate should possess the following knowledge and skills:

• Lifecycle Experience: Has gone through the complete lifecycle of a software solution at least once.
• Domain Expertise: Demonstrates expert-level capability in developing enterprise software systems within the specified technology domain.
• Design Proficiency: Proficient in UML application design as well as designing the data layer, business logic layer, and UI layer.
• Methodology: Practical experience working within Scrum agile development frameworks.
• Team Leadership: Capable of leading technical development teams.
• Documentation & Problem Solving: Holds the ability to document technical solutions effectively and presents strong problem-solving skills.

SPECIFIC EXPERTISE (Mandatory)

• Proven experience developing and supporting enterprise web applications on .NET (Core / 8) with C#, Entity Framework, and SQL Server, as well as React/TypeScript single-page applications, including build and deployment through Azure DevOps Pipelines.
• Hands-on experience with deployment and operation of applications on Windows/IIS and containerized or virtualized platforms (Nutanix / OpenShift), background-job frameworks (such as Hangfire), ASP.NET Core Data Protection, certificate management, Checkmarx security scanning, and penetration-test remediation.
• Experience integrating applications with SAML 2.0 / Entra ID, PDF and image-processing libraries, and document-management interfaces, alongside experience taking over external contractor codebases (code review, technical-debt management, 3rd-line support).
• Experience supporting production systems in a large organizational context (release management via Change Advisory Boards, UAT support, incident analysis) and readiness to collaborate alongside 3rd-party development contractors during 3rd-level support periods.

REQUIRED CERTIFICATES

At least one (1) certification from the following (or an internationally recognized equivalent accepted by the Contracting Authority) is mandatory:

• An Advanced level certificate in the software development technology domain.