Mid .Net Full Stack Developer 1670

UpcoMinds; Warszawa; On-site; PLN 21,000 - 26,000; Full time

Benefits offered by this job

Private health insurance

Wellness platform access

Learning & career growth

Job summary

UpcoMinds in Warsaw, Poland, is seeking a Mid Full Stack Core Developer with about 5 years of hands-on experience to join our development team. The role blends C#/.NET backend excellence with Angular frontend expertise to deliver enterprise-grade software systems.

You’ll design, develop and maintain reusable frameworks, shared services and core components, work in an Agile/Scrum environment, and contribute across the full SDLC while guiding junior developers.

Qualifications

• 5+ years of hands-on professional experience with C#/.NET in a Windows environment.
• Experience across the full Software Development Lifecycle (SDLC) in an Agile/Scrum setting.
• Strong knowledge of enterprise software design using .NET technologies.

Responsibilities

• Develop and maintain reusable frameworks, packages, shared services and core platform components.
• Design and develop applications, services and APIs using C#/.NET.
• Deliver modern Angular applications and micro-frontends.
• Develop and support .NET microservices and Node.js NestJS BFFs.
• Own assigned Core user stories including technical approach and scope.

Skills

Hands-on experience

C#/.NET

Angular frontend

REST/APIs

Agile/Scrum

Node.js/NestJS BFFs

Code reviews

Education

Level 6 degree in Computer Science / Software Engineering or related field

Tools

Microsoft Visual Studio

IIS

Nginx

PostgreSQL

SQL Server

Job description

We are looking for a Mid Full Stack Core Developer with approximately 5 years of hands-on professional experience to join our development team.

The role focuses on designing, developing and maintaining enterprise-level software systems, reusable frameworks, shared services and core platform components, combining strong C#/.NET backend expertise with practical Angular frontend experience.

You will work closely with Development Leads, Senior Core Developers, Business Analysts and domain development teams, contributing to the full software development lifecycle in an Agile/Scrum environment.

Key Responsibilities

• Develop and maintain reusable frameworks, packages, shared services and core platform components.
• Design and develop applications, services and APIs using C#/.NET.
• Design and deliver modern Angular applications and micro-frontends.
• Develop and support .NET microservices and, where appropriate, Node.js/NestJS BFFs.
• Own assigned Core user stories, including technical approach, refinement, scope clarification and dependency identification.
• Contribute to shared APIs, integrations, micro-frontend foundations and automated testing.
• Support framework, runtime and dependency upgrades.
• Troubleshoot and resolve issues related to shared components, services and applications.
• Contribute to requirements analysis, testing, quality assurance, change management and deployment activities.
• Produce and maintain technical documentation, specifications, READMEs and coding standards.
• Provide 2nd and 3rd line technical support and contribute to knowledge transfer within the team.
• Participate in code reviews and promote software engineering best practices.
• Work independently while providing guidance and support to junior developers.

Requirements

• 5+ years of hands-on professional experience in Object-Oriented Software Development using C#/.NET, preferably in a Windows environment.
• At least 8 years of combined post-secondary education and professional experience.
• Level 6 degree in Computer Science, Software Engineering, Information Technology or a related field.
• C1 level of English, according to CEFR.
• Experience across the complete Software Development Lifecycle (SDLC), including analysis, design, development, testing, deployment and support.
• Hands-on experience with Microsoft Visual Studio.
• Experience with IIS and/or Nginx, bug tracking and version control systems.
• Professional experience with relational databases, preferably PostgreSQL and/or Microsoft SQL Server.
• Experience working in an Agile/Scrum environment.
• Strong experience developing software components, services, applications and enterprise-level solutions.
• Strong knowledge of designing and developing enterprise software systems using .NET technologies.
• Good knowledge of database design, XML, authentication and authorization.
• Strong understanding of Object-Oriented Programming and software design principles.
• Ability to work independently and provide guidance to junior team members.
• Ability to produce technical specifications, concept documents and technical documentation.
• Strong communication skills and the ability to communicate effectively with technical and business stakeholders.
• Monthly compensation 1900-2300/gross for employees
• Private health insurance.
• Unlimited access to a workplace wellness and support platform.
• Continuous learning and career growth opportunities.
• Opportunity to work on large-scale core banking systems using modern technologies.
• Friendly, collaborative, and professional working environment.

UpcoMinds is a dynamic IT company with 28 years of experience that provides end-to-end web and mobile solutions helping businesses to reinvent themselves in the digital world. Our team’s skills and expertise will ensure the holistic digital transformation of any organization, which will considerably improve both business operations and customer’s experience.

Our goal is to always have our end products and services reflect our deep engineering skills and elegant progressive design aesthetic. We fundamentally believe deeply in developing long term strategic partnerships with our clients by exceeding expectations and maintaining a high level of transparency.

Find out more about us at www.upcominds.com

We commit to promote Inclusion & Diversity by creating a working environment where all employees are treated with dignity and respect and where individual differences are valued. We offer equal opportunity in all aspects of employment.