Senior Software Engineer (C#)

Posted 3 Days Ago
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Warsaw, Warszawa, Mazowieckie
In-Office
Senior level
Mobile • Software
The Role
As a Senior Software Engineer, you will own C# services for data ingestion and security analysis, ensure code quality, and debug complex systems. You'll lead technical troubleshooting sessions and design tailored solutions for clients.
Summary Generated by Built In
Why Join Exadel

We’re an AI-first global tech company with 25+ years of engineering leadership, 2,000+ team members, and 500+ active projects powering Fortune 500 clients, including HBO, Microsoft, Google, and Starbucks.

From AI platforms to digital transformation, we partner with enterprise leaders to build what’s next.

What powers it all? Our people are ambitious, collaborative, and constantly evolving.

About the Client

The Client is a custom software development company committed to providing quality IT solutions that facilitate and add value to clients’ businesses. They offer a full spectrum of custom software services, including web and mobile application development.

What You’ll Do  
  • Take full ownership of C# services responsible for high-scale data ingestion and real-time security analysis
  • Ensure the engine operates reliably across diverse customer environments
  • Navigate, maintain, and enhance a complex codebase using semi-functional programming paradigms
  • Uphold high standards of code quality and mathematical correctness in security detections
  • Identify and resolve support-related bugs through deep-dive analysis
  • Participate in live troubleshooting sessions with end-users
  • Design and implement ad-hoc improvements and tailored solutions for specific customer architectural needs
  • Help ensure the product remains a gold standard in identity security
What You Bring  
  • Advanced C# Mastery: Deep expertise in the .NET ecosystem and modern C# development
  • Functional Programming Mindset: Familiarity with or a strong interest in functional programming concepts (immutability, pure functions, etc.) applied within C#
  • Complex System Debugging: Proven ability to navigate, understand, and debug large-scale, multi-threaded codebases
  • Customer-Facing Maturity: The professional confidence and communication skills required to lead live technical troubleshooting sessions with global customers
  • Performance Engineering: Experience in optimizing high-throughput data processing services
  • 4+ years of experience in Backend development with a focus on C#
  • Strong analytical and mathematical thinking, suited for a semi-functional code environment
  • Full English Proficiency: Essential for clear communication during live support sessions and collaboration with international teams
  • Experience with Active Directory, LDAP, or Cloud Identity providers – A significant advantage
English level

Upper-Intermediate

Legal & Hiring Information
  • Exadel is proud to be an Equal Opportunity Employer committed to inclusion across minority, gender identity, sexual orientation, disability, age, and more
  • Reasonable accommodations are available to enable individuals with disabilities to perform essential functions
  • Please note: this job description is not exhaustive. Duties and responsibilities may evolve based on business needs
Your Benefits at Exadel 

Exadel benefits vary by location and contract type. Your recruiter will fill you in on the details.

  • International projects
  • In-office, hybrid, or remote flexibility
  • Medical healthcare
  • Recognition program
  • Ongoing learning & reimbursement 
  • Well-being program
  • Team events & local benefits 
  • Sports compensation 
  • Referral bonuses 
  • Top-tier equipment provision
Exadel Culture

We lead with trust, respect, and purpose. We believe in open dialogue, creative freedom, and mentorship that helps you grow, lead, and make a real difference. Ours is a culture where ideas are challenged, voices are heard, and your impact matters.

Top Skills

.Net
C#
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The Company
HQ: Walnut Creek, CA
1,549 Employees
Year Founded: 1998

What We Do

For more than 20 years, Exadel has been delivering Digital Transformation services, enterprise and custom software solutions for Fortune 500 clients, including HPE, Deloitte, Home Depot and McKesson. With 20+ locations and delivery centers across the US and Europe, Exadel solves the most complex engineering problems using Agile methodologies, offering a scalable and skilled mix of multi-shore resources at the industry's most competitive price. Exadel’s digital transformation solutions and services help chart new strategies that are built upon creative thinking, cutting-edge design, and technical innovation, designed for the growing digital landscape of business.

Enterprise Services
- Digital Transformation Experts
- Developing mission-critical software and mobile applications
- Advising companies on how best to leverage open source technology
- Helping companies plan and implement migrations to better technology stacks
- Providing QA, automation, and testing services for application development
- Supporting and maintaining applications and systems for companies
- Providing on-line training and mentoring to companies
- Assisting companies in evaluating their current enterprise software architecture and planning for improvements or new systems.

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