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Salary
≈ $54k – $89k per year (Estimated)
Location
Hybrid (Kraków, Poland)
Seniority
Senior · 5+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Nov 3, 2026. First seen by Alion on Oct 6, 2026.

Overview
Company
Impact
Profile match
Build high-performance software tailored to your business needs. We deliver scalable, secure, and innovative solutions to drive your success.

We are seeking an experienced Senior Backend Software Engineer to design, build, and scale

cloud-native backend systems for our SaaS platform.

You will play a key role in shaping system architecture, improving performance, and delivering

robust services that support high-traffic, customer-facing applications.

This role combines hands-on engineering with architectural influence.

You will collaborate closely with frontend engineers, product managers, and distributed teams to

deliver reliable and scalable solutions in a fast-paced, agile environment.

Key Responsibilities

  • Design, develop, and maintain scalable backend services using C# and .NET (6+)
  • Build and optimise RESTful APIs to support modern frontend applications
  • Architect and implement microservices-based systems with a focus on modularity and resilience
  • Develop and deploy solutions leveraging AWS cloud services
  • Ensure systems are highly available, secure, and performant
  • Collaborate with frontend engineers to ensure smooth API integration and performance
  • Partner with product and design teams to translate business requirements into technical solutions
  • Participate in architecture discussions, code reviews, and agile ceremonies
  • Write clean, maintainable, and well-tested code following industry best practices
  • Implement automated testing strategies (unit, integration, end-to-end)
  • Identify and reduce technical debt, improving long-term system sustainability
  • Monitor and improve system performance, reliability, and scalability
  • Stay current with emerging technologies and contribute to continuous improvement initiatives

Required Qualifications

  • 5+ years of experience in backend software engineering (web or SaaS environments)
  • Strong proficiency in C#, .NET, ASP.NET Core
  • Experience building and maintaining web-based applications and APIs
  • Solid understanding of distributed systems and cloud-native architecture
  • Hands-on experience with AWS
  • Experience designing and implementing event-driven systems
  • Strong knowledge of relational databases (e.g., SQL Server) and ORM tools (e.g., Entity Framework)

Preferred Qualifications

  • Experience with AWS services such as Lambda, API Gateway, DynamoDB, and Elasticsearch
  • Familiarity with Infrastructure as Code (e.g., Terraform)
  • Experience with CI/CD pipelines (e.g., GitHub Actions, TeamCity)
  • Knowledge of containerisation and orchestration (Docker, Kubernetes)
  • Exposure to serverless architectures
  • Experience supporting backend systems for modern frontend frameworks (e.g., React)
  • Familiarity with observability and monitoring tools

Soft Skills

  • Strong communication skills and ability to collaborate across distributed teams
  • Proactive mindset with a strong sense of ownership and accountability
  • Ability to prioritise effectively and deliver results under time constraints
  • Analytical problem-solving skills with attention to detail
  • Customer-focused approach to building reliable and user-centric systems

What We Offer

  • Opportunity to work on large-scale, globally distributed systems
  • Collaborative and international engineering environment
  • Competitive salary and benefits package
  • Flexible hybrid working model
  • Career growth opportunities and support for continuous learning

Interested? Send your resume! :)

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