You will lead the development of high-performance infrastructure for a platform automating complex financial workflows. You’ll own the event-driven architecture, cryptographic security layers, and multi-tenant data stores. This role is critical for building reliable, auditable systems that handle sensitive data, requiring deep expertise in PostgreSQL, systems design, and application security within a fast-paced environment.
Senior Backend / Platform Engineer at well-funded fintech AI startup
Are you a systems-focused engineer looking to build the infrastructure layer for the next wave of AI automation? We are looking for a Senior Backend / Platform Engineer to join our well-funded fintech startup. You'll own the core platform, from tamper-evident event stores and cryptographic signature systems to complex multi-tenant architectures. With a salary range of €80k-€180k plus equity, this is a unique opportunity to shape the foundational tech of a high-growth company while working on challenging problems in distributed systems and security. Join a senior team of innovators in Madrid or Munich and build the future of autonomous financial operations.
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Location
Madrid, Spain; Munich, Germany
Compensation
€80k-€180k + Equity
Company
Confidential company
Role overview
About the company
Well-funded fintech AI startup
What you will do
- Design and maintain an append-only event store using PostgreSQL with tamper-evident hash chaining and real-time distribution.
- Develop robust cryptographic signature infrastructure and secure workflow engines to verify and authorize external actions.
- Architect secure multi-tenant data stores and implement policy-as-code authorization to ensure strict data isolation and compliance.
Who this is a fit for
- Has 5+ years of experience designing backend platforms and 3+ years of production experience with Python or TypeScript.
- Demonstrates deep PostgreSQL expertise, including row-level security, event sourcing patterns, and performance tuning at scale.
- Possesses strong systems design and security architecture skills, including encryption models, key management, and auth patterns.
Why this role is remarkable
- Build foundational infrastructure for a next-generation AI automation platform from the ground up.
- Work directly with a founding team of industry experts at a well-funded startup backed by top-tier global VCs.
- Lead critical architectural decisions involving cryptographic security, complex event-driven systems, and high-scale data pipelines.
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