Senior C# Developer

Location: Hybrid role based in Katowice, Poland, with other locations in Barcelona, Spain and Amsterdam, Netherlands.

Company

hirify.global designs, deploys, and manages global networks, including managed internet, SD-WAN, SASE, and cloud connectivity, serving enterprise and government sites in more than 190 countries.

What you will do

• Develop and maintain the existing C#/.NET backend and create new services for supplier onboarding and quote management.
• Implement deterministic, auditable logic for quote-firming checks and translate complex commercial requirements into algorithms.
• Design, version, and maintain reliable APIs and service contracts for downstream consumers.
• Build supplier-data transformations, partner integrations, and internal tools.
• Write production-ready, scalable code with automated tests, engineering standards, and observability.
• Collaborate directly with commercial teams across onboarding, quoting, delivery, and billing.

Requirements

• Strong proficiency in C# and .NET Core.
• Experience with API design, microservices, and integration frameworks.
• Knowledge of CI/CD pipelines, automated testing, and observability tools.
• Builder mentality, strong ownership, and a code-first, automation-first approach.
• Ability to take a full-stack learning approach to support team resilience and collaborate across teams.

Nice to have

• Experience with enterprise integrations such as ServiceNow.
• Proficiency in other backend languages, preferably Python.
• Frontend experience with technologies such as React or NextJS.
• Familiarity with AWS Lambda, ECS, EKS, Docker, and Kubernetes.
• Experience with low-code platforms such as Mendix or Salesforce.
• Understanding of security practices including RBAC, SBOM, and dependency scanning.
• Experience working in a fast-paced, outcome-driven environment with cross-STO collaboration.

Culture & Benefits

• Direct access to production systems, real data, commercial decision-makers, and the impact of delivered work.
• Exposure to large-scale global networks and cutting-edge technologies.
• Senior technical execution trajectory with directly applicable knowledge-building opportunities.
• Hybrid working and 25 days of holiday.
• Engaged, ownership-oriented working environment with direct commercial stakes.
• Equal-opportunity workplace supporting employees regardless of background, religion, nationality, sexual orientation, age, or physical condition.