StoneX Group Inc.

Lead .NET Engineer with Agentic Development

StoneX Group Inc.
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2 years ago
Kraków, PolandStaff+

Responsibilities

  • Own backend architecture and technical direction for FX Payments across multiple squads.
  • Design, build, modernize, and support scalable full-stack solutions using C#/.NET, React/TypeScript, and Azure cloud-native services.
  • Lead complex technical initiatives across the full software development lifecycle, from refinement and design through deployment and production support.
  • Drive improvements in system performance, reliability, observability, data integrity, resiliency, and regulatory compliance.
  • Conduct design reviews, architectural deep dives, code reviews, and maintain architecture documentation and ADRs.
  • Ensure strong automated testing, CI/CD hygiene, technical risk management, incident resolution, and root cause analysis.
  • Mentor backend engineers on system design, clean coding, cloud-native patterns, distributed systems, and responsible agentic tooling.
  • Lead through technical influence, facilitate architecture discussions, and contribute to engineering standards and reusable backend patterns.

Requirements

  • At least 8 years of professional software engineering experience with a strong backend focus.
  • Deep expertise in C# and .NET and extensive experience with microservices, event-driven architectures, messaging, and distributed systems.
  • Experience with scalable design patterns, clean architecture, SOLID principles, relational and/or NoSQL databases, Git, CI/CD, and cloud-native development.
  • Extensive Azure experience, including App Services, Functions, Kubernetes, and containerized workloads.
  • Familiarity with infrastructure-as-code, observability tooling, frontend development, React, and related tooling.
  • Hands-on experience with AI-assisted development tools such as Claude Code, GitHub Copilot, or Copilot Workspace, including validating AI-generated backend code.
  • Experience leading small engineering teams and technical initiatives without direct people management.
  • Strong collaboration, stakeholder management, facilitation, communication, planning, and technical risk assessment skills.
  • Minimum bachelor's degree in information technology or a software engineering discipline.

Benefits

  • Permanent, full-time FTE employment.
  • Hybrid work arrangement requiring four days in the office.
  • Private parking is available for employees.
  • Clear progression toward a Principal Engineer technical role.
StoneX Group Inc.

About StoneX Group Inc.

5,001-10,000 employees
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