Senior Full-Stack Engineer - Platform team

Taktile; Berlin; Remote; EUR 90,000 - 130,000; Full time

Job summary

the company, a Berlin-based fintech AI-native platform, is seeking a Senior Full-Stack Engineer to join the Platform team and build the IAM and permissions backbone. You’ll design permission models, integrate React/TypeScript UIs with Python (FastAPI) services, and tackle multi-tenant, audit-ready authorization at scale.

You’ll collaborate across engineering and product to enable secure access, SSO/OAuth flows, and compliant governance in a remote-first environment with global customers.

Qualifications

• 5+ years of professional full-stack experience building backend services in Python (FastAPI or equivalent), including REST APIs and databases.
• Strong proficiency with React and TypeScript.
• Experience building access control systems (RBAC/SSO/OAuth/OIDC, multi-tenant permissions).
• Experience integrating into AWS or similar cloud providers.
• Fluency in English, both written and spoken.

Responsibilities

• Design, build, and operate core authorization primitives such as roles, policies, and fine-grained permission checks (RBAC/ReBAC).
• Guarantee strict multi-tenant isolation so each customer's data stays segregated.
• Keep fine-grained permission checks fast in high-volume decision paths.
• Build audit and access-trail capabilities for verifiability by customers and auditors.
• Design for regulated-industry constraints (SOC 2/ISO 27001, data residency) with compliant access control.
• Leverage AI tools daily to enhance AI-native capabilities.

Skills

Python (FastAPI)

React/TypeScript

REST APIs

AWS

English fluency

Tools

AWS

Job description

the company empowers financial institutions to transform into truly AI-native organizations. We’re growing rapidly with enterprise customers across banks and insurance companies, and we’re looking for a Senior Full-Stack Engineer to join our Platform team.

About the role

Our Engineering and Product Design teams are building multiple verticals on our platform at high speed, leveraging AI and building agentic functionality into the platform itself. As we scale into the world's largest regulated financial institutions, identity and access management (IAM), authorization, and fine-grained permissions have become foundational to our enterprise readiness.

We are hiring a Full-Stack Engineer to join the team building the company's IAM and permissions platform: the authorization backbone that powers enterprise-grade access control across our product.

Joining us, you'll design and build permission models and access controls end-to-end, from the React/TypeScript access-management and admin UIs down to the Python (FastAPI) authorization services. You'll take on the problems that make enterprise authorization genuinely hard: multi-tenant isolation, fine-grained permission checks in the hot path of millions of decisions a day, audit and access trails, and the constraints of regulated financial services.

What You'll Do

• Design, build, and operate core authorization primitives such as roles, policies, and fine-grained permission checks (RBAC/ReBAC), along with the authentication and SSO/OAuth/OIDC flows that sit on top of them.

• Guarantee strict multi-tenant isolation so every customer's data and decisions stay fully segregated.

• Keep fine-grained permission checks fast in the hot path of millions of automated decisions per day, where both latency and correctness are non-negotiable.

• Build audit and access-trail capabilities that give customers and auditors a verifiable record of who accessed what, when, and why.

• Design for regulated-industry constraints (financial services, SOC 2 / ISO 27001, data residency), where access control is a compliance requirement, not just a feature.

• Leverage leading edge AI tools (e.g. Claude) on a daily basis to build industry-shaping AI-native capabilities.

Requirement:

• 5+ years of professional full-stack experience building backend services in Python (FastAPI or equivalent), including REST APIs and databases

• Strong proficiency with React and TypeScript.

• Experience building access control systems, with exposure to authentication and authorization concepts (RBAC, SSO, OAuth/OIDC, multi-tenant permissions).

• Strong engineering fundamentals with a passion for simplicity and precision.

• Experience integrating into AWS or similar cloud providers.

• Fluency in English, both written and spoken, is essential as we operate in a remote environment requiring clear and effective communication.

Nice, but not required

• Deeper backend specialization (async patterns, performance tuning, data modeling).

• DynamoDB or Postgres, SQLAlchemy.

• Hands-on experience designing authorization systems at scale: fine-grained / ReBAC models, policy engines (OpenFGA or Zanzibar-style systems, OPA), or multi-tenant RBAC for enterprise SaaS.

• Prior ops or on-call experience.

Our Offer

• Work with colleagues that lift you up, challenge you, celebrate you and help you grow. We come from many different backgrounds, but what we have in common is the desire to operate at the very top of our fields. If you are similarly capable, caring, and driven, you'll find yourself at home here.

• Experience a truly flat hierarchy and communicate directly with founding team members. Having an opinion and voicing your ideas is not only welcome but encouraged, especially when they challenge the status quo.

• Learn from experienced mentors and achieve tremendous personal and professional growth. Get to know and leverage our network of leading tech investors and advisors around the globe.

• Receive a top-of-market equity and cash compensation package.

• Get access to a self-development budget you can use to e.g. attend conferences, buy books or take classes.

• Receive a new Apple MacBook Pro, as well as meaningful home office set-up.

About Usthe company enables financial institutions to transform into AI-native organizations that are increasingly powered by autonomous agents. With our modular Agentic Decision Platform, customers combine AI agents, rules, relevant context, and human oversight to safely automate and optimize their decisions—approving more customers, reimbursing claims instantly, stopping fraud before it spreads, and financing every business worth funding. Founded in 2020, the company powers millions of decisions daily for institutions including Mercury, Monzo, Faire, and Pleo. With offices in New York, Berlin, London, São Paulo, and Iași, the company has raised $184M from Growth Equity at Goldman Sachs Alternatives, Index Ventures, Tiger Global, Balderton Capital, and Y Combinator. Learn more at the company.com

About Your Employment. the company operates through regional entities worldwide. Depending on the location of this role, your employment or engagement will be with the company LLC (US), the company GmbH (Germany), the company Ltd (UK), or the company SRL (Romania). The applicable entity will be confirmed during the offer process.

Your Privacy. the company (“we” or “us”) is the controller of the personal data you provide during this

application process. We collect and process your name, contact details, resume/CV, work history, education, and any other information you submit or that we obtain from publicly available sources or references.

How we use your data: We process your personal data to evaluate your candidacy, communicate with you about the recruitment process, comply with legal obligations (such as right-to-work verification), and, with your consent, to consider you for future opportunities.

Legal basis (EU/UK applicants): We rely on (i) pre‑contractual steps at your request (GDPR/UK GDPR Art.6(1)(b)), (ii) legal obligations (Art. 6(1)(c)), and (iii) our legitimate interest in evaluating candidates (Art.6(1)(f)).

Retention: If your application is unsuccessful, we retain your data for 12 months after the recruitment process concludes, unless you consent to longer retention. Successful candidates’ data becomes part of their employment records.

Your rights: Depending on your location, you may have the right to access, correct, delete, or restrict the processing of your personal data, to data portability, and to withdraw consent.

Automated decision-making: We use automated tools to assist in screening applications. No hiring decision is made solely by automated means without human review.

International transfers: Your data may be transferred to and processed in the United States, Germany, the United Kingdom, or Romania. Where required, transfers are protected by Standard Contractual Clauses or other approved mechanisms.

By submitting your application, you acknowledge that you have read and understood the company’s Applicant Privacy Policy. To exercise your rights or ask questions, contact -----Find Jobs in Germany on Arbeitnow