Senior Software Engineer – Python Focus (React/Next.js a Plus) – m/w/d

🚀 About the Company

We are a modern, AI-native payroll API platform on a mission to simplify global payroll. Our technology empowers businesses to seamlessly integrate payroll into their products and processes through a simple, easy-to-use API.

Our AI-powered platform makes payroll operations faster, more accurate, and cost-efficient — transforming compliance with rapidly changing tax and regulatory requirements into a fully automated process. Powered by gross-to-net and tax filing engines built on cutting-edge computational graph technology and AI agents, we dynamically monitor and adjust for global tax law changes in real time.

Founded by payroll and fintech veterans, we help fast-growing companies scale across borders without scaling payroll headaches or operational costs.

💪 About the Role

We’re expanding our engineering team and seeking a Senior Software Engineer (Python focus) who will play a pivotal role in building out our modern payroll platform. You’ll collaborate closely with payroll specialists in Berlin and the UK, as well as interface with government and private consortiums (including HMRC).

This role is ideal for engineers who thrive in distributed teams, enjoy working on complex systems, and want to directly shape the future of global payroll technology.

🎯 Core Responsibilities

• Build and scale a modern payroll platform from the ground up.

• Collaborate with government and private consortiums (HMRC), including participation in official meetings.

• Partner closely with payroll specialists in the UK and Berlin.

• Design, develop, and maintain APIs for our payroll product.

• Work directly with customers post-sale to ensure smooth integrations.

• Mentor and coach future engineers as the team grows.

✅ Must-Have Requirements

• 3+ years of professional experience with Python.

• Strong expertise in API development.

• Hands-on experience with public cloud platforms (GCP preferred).

• Solid understanding of relational databases, ideally PostgreSQL.

• Track record of deploying large-scale products into production within complex codebases and larger teams.

• Commercial experience delivering complex software solutions.

• Payroll domain knowledge (e.g. Personio, SDWorks) or broader HCM experience is a strong plus.

• Ability to collaborate across global teams and time zones.

• Proven success working in remote, distributed teams.

✌️ Nice-to-Have Skills

• Frontend skills with React (for occasional full-stack tasks — no UI specialization required).

• Experience with Vercel / Next.js.

• Previous exposure to HMRC processes.

• Proficiency in multiple programming languages.

• Fluency in additional languages beyond English.

💰 Compensation & Benefits

• Salary: Up to £86,000 per year (depending on experience).

• 100% remote-first role with flexibility.

• Opportunity to work with a cutting-edge AI-native platform.

• Direct impact on shaping the product and engineering culture.

• Career growth opportunities, including mentorship and leadership pathways.

🔗 Hiring Process

1. Single combined interview (technical + cultural) with our two co-founders + one technical team member (45–60 minutes).

2. Reference checks.

3. Potential offer.

🏆 Your Team

• Engineering: Poland & Germany

• Payroll Specialists: UK & Dubai

• DevOps & Marketing Consultants: US

🏰 Location

• 100% Remote

• Must be based in the UK or Ireland