Lead Software Engineer

Hybrid model: 3 days/week in the office

For our client, a top-tier global quantitative investment firm expanding its Warsaw technology hub, we are looking for a Lead Software Engineer. The company is currently engaged in a multi-year strategic initiative to build next-generation Middle and Back-office systems that support their global trading operations, portfolio management, and overall firm growth.

This is a strict Player-Coach role (60-70% hands-on coding & architecture / 30-40% management). You will be actively building software while directly managing a compact team of 4 to 6 engineers. You will also take ownership of stakeholder management, gathering requirements directly from global finance, tax, and portfolio management teams.

What you will do:

• Code & Architect (60-70%): Lead the end-to-end design, architecture, and delivery of highly scalable financial technology platforms.

• Lead & Mentor (30-40%): Manage a team of 4-6 developers, conduct 1:1s, performance reviews, and guide their career development.

• Drive the adoption of engineering best practices across code quality, cloud-native architecture, and DevOps.

• Ensure platforms are highly reliable, recoverable, and scalable to support increasing daily data volumes and analytics requirements.

• Collaborate directly with global product and engineering teams to translate complex business needs into technical implementations.

Requirements:

• 10+ years of commercial software development experience.

• 2+ years of formal experience leading engineering teams (people management) and driving large-scale projects.

• Deep engineering expertise in C# (or strong OOP background with a willingness to transition).

• Proven track record of designing and building cloud-native applications.

• Experience with enterprise messaging systems and distributed architectures.

• Strong experience with large-scale data processing and modern databases (e.g., Snowflake).

• Exceptional communication skills with the ability to manage expectations of senior, non-technical stakeholders.

• Degree in Computer Science, Mathematics, Engineering, or a closely related field.

Nice to have:

• Prior experience in the financial services industry, ideally within asset management, hedge funds, or trading firms.

• Domain knowledge of Middle/Back-office operations.

• Familiarity with financial accounting systems (e.g., Advent Geneva).