Senior Backend and AI Engineer ( Java /Python ) $$$$ Offline

We are looking for our client a Senior Backend & AI Engineer to join an ambitious product team building an intelligent financial automation platform for SMEs. This is a role for someone who enjoys solving complex problems, working autonomously, and having a direct impact on product decisions and architecture.

🚀 About the Project

Our client is building a modern platform that combines AI-powered document processing, financial automation, accounting workflows, and deep system integrations. The platform is actively used by professional accountants and paying customers — it’s growing fast and scaling across Europe.

This is not an MVP. It’s a production fintech product with real users, real workflows, and real engineering challenges.

💡 Why this role is exciting

• You directly influence architecture, system design, and product decisions.
• You work on a sophisticated platform combining AI, FinTech, and backend engineering.
• You shape the foundations of a system that will scale from thousands to tens of thousands of transactions per month.
• Lean, fast, engineering-driven culture — no heavy bureaucracy.
• Europe-based team, remote work possible.
   

🧩 Responsibilities

1. Core Backend & Document Processing Pipeline

• Develop and evolve the document-processing pipeline (OCR, classification, entity extraction, deduplication).
• Build and maintain APIs and internal backend services.
• Ensure reliability, observability, and high performance of backend systems.

2. External Integrations & Billing

• Build integrations with accounting systems, payment providers, cloud storage, email systems, and more.
• Develop a unified integration SDK: retries, rate limits, idempotency, consistent error handling.

3. Performance & Architecture

• Optimize API performance (p95 latency, async patterns, queues, background jobs).
• Enhance monitoring and logging (Prometheus, Grafana, Sentry).
• Scale the architecture (caching, partitioning/sharding in Postgres/ClickHouse).

4. AI & Model Evaluation

• Integrate LLM/ML components into backend services.
• Build evaluation loops: model metrics, drift detection, alerts, dashboards.

5. Automation & RPA

• Implement RPA-style flows for tax filing, government portals, and banking systems using Playwright/Selenium.
   

🧠 Requirements

Must-have:

• Location - Europe 
• English C1
• Strong backend engineering experience in  Java or/and Python 
• Experience building and operating production systems (APIs, background jobs, integrations).
• Solid knowledge of Postgres: schema design, indexing, query optimization.
• Experience with cloud infrastructure (preferably AWS) and message queues (SQS or similar).
• Product mindset: focus on user experience and problem-solving.
• Startup mindset: comfort with ambiguity, fast iteration, ownership.
• Curiosity about LLMs/ML and willingness to grow in this area.
   

Nice-to-have:
 

• Experience with ClickHouse, Zoho, Stripe, OCR/Document AI.
• RPA experience (Playwright/Selenium).
• Background in fintech or accounting systems.
• Startup or founding engineer experience.
   

🎯 What our client offers:
 

• A chance to work on an impactful product used daily by real customers.
• A strong engineering culture with autonomy and ownership.
• Flexible schedule and remote work from anywhere in Europe.
• Opportunities to grow in AI-driven backend engineering.