Senior Software Engineer – Financial Statement Suite

Jobtailor; Amsterdam; On-site; EUR 90,000 - 130,000; Full time

Job summary

Jobtailor is seeking a senior backend engineer to design production APIs and AI powered workflows for financial statement review. You will integrate Python/C# APIs with Azure AI services and contribute to a React frontend used by auditors to review results.

The role emphasizes a quality‑first approach, scalable architecture, and mentoring teammates in a fast‑growing environment. English communication and collaboration are essential.

Qualifications

• 7+ years building applications with a modern backend stack.
• Experience with object‑oriented languages; Python is preferred.
• Hands‑on experience with TypeScript and React.
• Strong experience building, deploying, and maintaining APIs on Azure.
• Solid fundamentals in software architecture and system design.
• Experience with relational and document‑based databases.
• Quality‑first mindset; testing is second nature.
• Proficiency with AI‑assisted engineering tools (Claude Code).
• Experience with Docker and containerized deployments.
• Excellent communication and collaboration in English.

Responsibilities

• Design and build production APIs and services in Python and C# for financial statement workflows.
• Develop AI powered agents and workflows to automate preparation and checking of statements.
• Contribute to the React frontend where auditors review results.
• Pair LLM outputs with deterministic checks to ensure trustworthiness.
• Integrate with Azure and its AI services.
• Apply OWASP and GenAI security guidance across the stack.
• Architect services using established design principles for future use cases.
• Write robust, production‑ready code with tests as deliverables.
• Mentor engineers, drive best practices, and participate in hiring and onboarding.
• Diagnose issues across services and drive stability with operational data.
• Participate in on‑call rotation and own what you ship.
• Break down epics, manage dependencies, and navigate ambiguity.
• Collaborate with product managers and designers to shape solutions and roadmaps.
• Foster documentation and knowledge sharing with stakeholders.
• Use AI‑assisted engineering responsibly and critique AI output.

Skills

C#

TypeScript

Python

Object‑oriented programming

React

Azure

Docker

APIs

Unit Testing

E2E Testing

English communication

Tools

Azure

Claude Code

Docker

Job description

Responsibilities

• Design and build production APIs and services, primarily in Python and C#, that power financial statement review workflows.
• Develop AI-powered agents and workflows that automate the preparation and checking of financial statements, integrating LLMs and document-understanding pipelines.
• Contribute to the React web front end, where auditors review, correct, and approve results.
• Keep results trustworthy by pairing LLMs with deterministic checks; correctness is never left to guesswork.
• Integrate with Azure and its AI services.
• Implement security controls aligned with OWASP and OWASP GenAI security guidance.
• Architect services and systems using well-established design principles, anticipating future use cases.
• Write robust, production-ready code that anticipates edge cases; unit, integration, and end-to-end tests are part of the deliverable, not an afterthought.
• Raise the engineering bar through high-quality code reviews, technical mentorship, and establishing best practices.
• Diagnose complex issues across services and use operational data to drive stability improvements.
• Participate in the on-call rotation and stay accountable for what you ship.
• Break down epics, align dependencies, and help the team navigate ambiguity.
• Partner with product managers and designers to shape solutions, refine the roadmap, and simplify technical approaches.
• Foster a culture of documentation and knowledge sharing within the team and with business stakeholders.
• Use AI-assisted engineering effectively and responsibly, critically evaluating AI output and helping the team adopt it well.
• Mentor engineers and contribute to hiring, onboarding, and leveling up the team.

Requirements

• 7+ years of experience building applications with a modern backend stack.
• Experience with object‑oriented language is required. Experience with Python is preferred.
• Hands‑on experience with TypeScript and a modern front‑end framework such as React.
• Strong experience building, deploying, and maintaining APIs on a major cloud platform (we use Azure).
• Strong fundamentals of software architecture and system design.
• Experience with relational and document‑based databases.
• A quality‑first mindset; testing (unit, integration, E2E) is second nature.
• Proficiency with AI‑assisted engineering tools (we use Claude Code).
• Experience with Docker and containerized deployments.
• Excellent communication and collaboration skills in English, both written and verbal.
• Entrepreneurial mindset with the ability to work effectively in an ever‑changing scale‑up environment.
• Experience building or integrating AI agentic applications in production (LLM orchestration, RAG, evals, prompt engineering) is a nice‑to‑have.
• Experience with document processing (OCR, PDF extraction, layout parsing) is a nice‑to‑have.
• Domain experience in audit, accounting, or fintech is a nice‑to‑have.
• Exposure to Event‑Driven Architecture and Domain‑Driven Design principles is a nice‑to‑have.
• Experience mentoring engineers or leading technical initiatives is a nice‑to‑have.

Hard Skills

• C#
• TypeScript
• Software Architecture
• Unit Testing
• Integration Testing
• End‑to‑End Testing
• Docker
• Relational Databases
• Document-Based Databases
• Document Processing

Soft Skills

• Excellent Communication
• Collaboration Skills
• Entrepreneurial Mindset