Sphera

Senior Software Engineer (.Net & Azure Cloud)

Poland · Work style not stated · Full time

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About the role

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EmployerSphera
LocationPoland
Work styleWork style not stated
Employment typeFull time
Employer posted17 Sep 2026

Sphera is a leading global provider of enterprise software and services that enables companies to manage and optimize their environmental, health, safety and sustainability. Our mission is to create a safer, more sustainable and productive world.

Sphera is a portfolio company of Blackstone, a U.S.-based alternative asset investment company that focuses on private equity, technology and innovation, and more. Blackstone businesses succeed through strong partnerships, a personalized approach and a commitment to exceptional performance with uncompromising integrity. Sphera and Blackstone are leaders in the Environmental, Social and Governance (ESG) space.

We are guided by our core values of Customer Centricity, Accountability, Bias to Action, Innovation, and Collaboration. These values help us recruit the right talent to join our rapidly expanding team of around the globe. It is important to us that each and every Spherion is not only eager to challenge themselves and knows how to get work done but is an awesome addition to our company culture.

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About the Role

We are seeking a Senior .NET Developer with deep experience in Azure cloud services and Azure DevOps to lead the design and delivery of scalable, secure, cloud-native applications. This role will have significant technical ownership, contribute to architecture and engineering standards, and mentor other developers while working closely with product and platform teams.

Key Responsibilities

Lead the design, development, and delivery of complex applications using .NET (C#, ASP.NET, .NET 6+/Core).
Architect and implement cloud-native solutions on Microsoft Azure (e.g., App Services, Functions, AKS, Service Bus, SQL, Storage, Key Vault).
Design, implement, and optimize CI/CD pipelines using Azure DevOps; promote DevOps best practices across teams.
Provide technical leadership through design reviews, code reviews, and architectural guidance.
Partner with Product Owners and stakeholders to translate business requirements into technical solutions.
Ensure high standards for code quality, security, performance, reliability, and observability.
Lead troubleshooting of complex production issues and drive root cause analysis and remediation.
Mentor and coach junior and mid-level engineers; contribute to hiring and onboarding.
Continuously improve engineering practices, tooling, and delivery processes.

Required Qualifications

6+ years of professional experience in .NET development (C#, ASP.NET, .NET Core/.NET).
Proven experience designing and delivering cloud-native solutions on Microsoft Azure.
Strong hands-on experience with Azure DevOps (repos, pipelines, releases, work item integration).
Solid experience with distributed systems, RESTful APIs, and microservices architectures.
Strong knowledge of relational databases (Azure SQL/SQL Server) and data access patterns (Entity Framework, Dapper).
Deep understanding of software architecture, design patterns, and engineering best practices (SOLID, clean architecture, automated testing, CI/CD).
Experience leading technical initiatives or acting as a technical owner/lead on projects.
Experience working in Agile/Kanban environments.

Preferred / Nice-to-Have

Experience with containers and orchestration (Docker, AKS/Kubernetes).
Infrastructure as Code (Bicep, ARM templates, Terraform).
Event-driven architectures (Service Bus, Event Grid, Event Hubs).
Security and compliance in cloud environments (identity, secrets management, least privilege).
Observability and monitoring (Application Insights, Azure Monitor).
Azure certifications (e.g., AZ-204, AZ-305) a plus.
Experience with frontend frameworks (React, Angular) is a plus.

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Sphera is proud to be an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all colleagues.

This job description is intended to convey information essential to understanding the scope of the job and the general nature and level of work performed by job holders within this job. This job description is not intended to be an exhaustive list of qualifications, skills, efforts, duties, responsibilities or working conditions associated with the position.

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