Senior Software Engineer — Hybrid (Poland) Lead Complex Features

Aon plc; Kraków; Hybrid; PLN 120,000 - 160,000; Full time

Job summary

Aon plc in Poland is seeking a Senior Software Engineer to own and deliver major features across large-scale applications. You will participate in design, development, testing and deployment within a hybrid work model.

You will code in C#, .NET, SQL, JavaScript and React, translate product requirements into concrete plans, conduct reviews, and uphold high quality, maintainability and security across the platform.

Qualifications

• 4+ years of professional software engineering experience, ideally working with large-scale SaaS or enterprise applications.
• Strong hands-on experience with C#, .NET, SQL and JavaScript. Able to independently develop and deliver complex features.
• Strong understanding of database design, SQL querying, schema design and query optimisation, combined with experience working with APIs and system integrations.
• Experience with code reviews, automated quality checks and software building, capable of considering maintainability, performance and the broader consequences of technical decisions.
• Strong analytical, communication and collaboration skills, with the ability to work effectively with global teams and provide technical mentorship to less experienced engineers.
• Experience with MVC, React, Azure, AKS/Kubernetes, Azure DevOps CI/CD, OpenAPI, mentoring engineers, automated testing frameworks or HR technology platforms would be an advantage.

Responsibilities

• Developing and delivering complex components and subsystems using C#, .NET, SQL and JavaScript and React, with a focus on clean, maintainable and well-tested code.
• Translating product requirements into clear implementation plans and contributing to technical specification documents alongside the Team Lead.
• Conducting code reviews and supporting strong engineering practices across software architecture, APIs, automated testing and CI/CD.
• Investigating complex technical and production issues, while considering performance, security, accessibility and the wider impact of changes across the platform.
• Working closely with the Team Lead, Solution Architects, QA and Business Analysts to clarify requirements, validate technical designs and manage dependencies across teams.
• Supporting engineers with less experience through code reviews, pairing and technical mentorship, while using AI tools in day-to-day engineering work including building, coding, testing and documentation.

Skills

C#

.NET

SQL

JavaScript

React

Mentorship

Tools

Azure

AKS/Kubernetes

Azure DevOps CI/CD

OpenAPI

Job description

Aon plc in Poland is seeking a Senior Software Engineer to own and deliver major features across large-scale applications. You will participate in design, development, testing and deployment within a hybrid work model.

You will code in C#, .NET, SQL, JavaScript and React, translate product requirements into concrete plans, conduct reviews, and uphold high quality, maintainability and security across the platform.