Lead Software Engineer – AI Agent for Software Development

SimCorp; Warszawa; On-site; PLN 260,000 - 340,000; Full time

Benefits offered by this job

Flexible hybrid model

Global team collaboration

Career development opportunities

Job summary

SimCorp is seeking a Lead Software Engineer to build an internal AI agent that supports the SDLC for a global fintech audience. You will combine deep .NET expertise with AI-agent engineering, mentoring, and architectural ownership across international teams.

You will design secure integrations, evolve the agent runtime, and ensure reliable operations in a production Azure environment, while guiding engineers and contributing to cross-team knowledge sharing.

Qualifications

• Bachelor’s or master’s in CS/Engineering/Math or related field.
• 5+ years of software engineering with C#/.NET backend.
• Strong distributed-systems judgment and state recovery.
• Experience building AI/LLM apps beyond prompts and tool calls.
• Experience with AI coding agents such as Claude Code or Codex.

Responsibilities

• Own design, development, and operation of the AI agent product.
• Evolve the AI-agent runtime: planning, tool usage, context management, state recovery.
• Design secure, resilient integrations with engineering tools and platforms.
• Maintain and extend the Blazor frontend used by engineers.
• Own production reliability on Azure, testing, and incident response.

Skills

C#/.NET

Distributed systems

Azure

AI/LLM apps

Security & RBAC

Blazor

Education

CS degree

Tools

Docker

Kubernetes

OpenAI/Azure OpenAI

Job description

Lead Software Engineer- AI Agent for Software Development

WHAT MAKES US, US Join some of the most innovative thinkers in FinTech as we lead the evolution of financial technology. If you are an innovative, curious, collaborative person who embraces challenges and wants to grow, learn and pursue outcomes with our prestigious financial clients, say Hello to SimCorp! At its foundation, SimCorp is guided by our values — caring, customer success-driven, collaborative, curious, and courageous. Our people-centered organization focuses on skills development, relationship building, and client success. We take pride in cultivating an environment where all team members can grow, feel heard, valued, and empowered. If you like what we’re saying, keep reading!

Why this role is important to us

Are you an expert engineer ready to build an internal AI agent that safely and reliably supports the software development lifecycle (SDLC) across a global fintech? At SimCorp, we develop products that power investment management and financial institutions worldwide — and we are investing heavily in AI to make our own engineering organization faster and better. You will join the team developing our internal AI agent for the software development lifecycle: a production-grade product that helps engineers investigate code, analyze CI failures, review pull requests, work with backlog items, and automate recurring tasks through secure tools and agents. It is a real distributed product — agent runtime, enterprise integrations, sandboxed execution, and Azure operations — built and run end to end by this team. The agent runs as a single always-on hosted service that engineers across the organization use concurrently. This is a practical leadership role: you will combine deep technical expertise in .NET distributed systems and AI-agent engineering with mentoring, architectural ownership, and collaboration across international teams.

Engineering and architecture

• Deeply participate in technical design, development, and operation of the product.
• Evolve the AI-agent runtime: how agents plan, use tools, manage context, and reliably recover state.
• Design secure, resilient integrations with engineering systems (source control, CI/CD, work-item tracking, collaboration and documentation platforms) through typed connectors, and MCP tools.
• Improve the agent's secure execution environments: hosted Linux sandboxes and remote sessions that let the agent assist directly on a user's machine, with confirmation and audit models.
• Maintain and extend the Blazor Web Assembly frontend that engineers use to work with the agent every day.

Operations and quality

• Own production reliability on Azure: telemetry, diagnostics, performance and cost monitoring, deployment pipelines, and operational documentation.
• Write high-quality automated tests at unit, functional, integration, and acceptance levels, and design for testability.

Leadership and collaboration

• Mentor and coach engineers, and review code and architectural changes with an emphasis on correctness, security, and long-term product evolution.
• Represent the team in technical forums and contribute to cross-team knowledge exchange on AI engineering practices.

Qualifications

• Bachelor's or master's degree in computer science, Engineering, Mathematics, or a related field.
• 5+ years of software engineering experience with advanced C#/.NET backend skills.
• Deep distributed-systems judgment: asynchronous processing, concurrency, cancellation, retries, idempotency, and state recovery.
• Experience building AI/LLM applications beyond simple prompt calls: tool calling, agent orchestration, structured outputs, context management, and model-provider abstraction (e.g., Azure OpenAI).
• At least 1 year of practical, daily experience working with AI coding agents such as Claude Code or Codex.
• Experience with open-source agents (e.g., OpenCode, Hermes, OpenClaw, or similar) and curiosity about how they work under the hood.
• Motivation to work in the AI space and the flexibility to try new technologies: you stay on top of market trends and bring the ecosystem's best practices — better memory, context management, and agent autonomy — into the product.
• Solid experience with ASP.NET Core, relational persistence (PostgreSQL/EF Core preferred), and designing external-facing APIs with authentication, authorization, rate limiting, and resilience policies.
• Cloud engineering experience on Azure.
• Solid working knowledge of Linux: shell, processes, networking, and filesystems, and comfort debugging inside containerized environments.
• Practical experience with Docker and container isolation is highly recommended; familiarity with sandboxing technologies such as Sysbox, gVisor, or microVM-based isolation (e.g., Firecracker) is a strong advantage.
• Ability to reason about security boundaries, secrets, RBAC, auditability, and safe execution of side-effecting operations.
• Frontend experience with Blazor or a modern SPA framework.
• Experience with Windows automation which powers the agent's ability to assist on user machines.
• Ability to lead or mentor engineers and make technical decisions.
• Effective English communication skills, both written and spoken.

Benefits

• Attractive salary, bonus scheme, and pension are essential for any work agreement.
• Good work-life balance: flexible working hours and a hybrid model.
• Simcorp follows a global hybrid policy, asking employees to work from the office two days each week while allowing remote work on other days.
• Simcorp does offer opportunities for professional development: there is never just only one route - we offer an individual approach to professional development to support the direction you want to take.

About us

For over 50 years, we have worked closely with investment and asset managers to become the world’s leading provider of integrated investment management solutions. We are 3,000+ colleagues with a broad range of nationalities, educations, professional experiences, ages, and backgrounds. SimCorp is an independent subsidiary of the Deutsche Börse Group. Following the recent merger with Axioma, we leverage the combined strength of our brands to provide an industry-leading, full, front-to-back offering for our clients.

SimCorp is an equal opportunity employer and welcome applicants from all backgrounds, without regard to race, gender, age, disability, or any other protected status under applicable law. We are committed to building a culture where diverse perspectives and expertise are integrated into our everyday work.

SimCorp is a provider of industry-leading integrated investment management solutions for the global buy side. Founded in 1971, with more than 3,000 employees across five continents, SimCorp is a truly global technology leader that empowers more than half of the world’s top 100 financial companies through its integrated platform, services, and partner ecosystem. SimCorp is a subsidiary of Deutsche Börse Group.

As of 2024, SimCorp includes Axioma, the leading provider of risk and management and portfolio optimization solutions for the global buy side.

Discover more about our culture, recruitment process, and commitment to promoting meaningful work