Founding Engineer

About the role

Join ShareShare as a Founding Engineer and own the most critical parts of our platform – the payments pipeline, billing engine, and integration layer. You will work directly with the CTO and a small, high‑intensity engineering team to ship production‑grade systems that handle real financial transactions for ISP partners across Africa.

Key responsibilities

• Design, build, and maintain a NestJS microservice architecture for payments, billing, and partner integrations.
• Integrate with payment gateways such as M‑Pay, Stripe, and Adyen, handling STK push flows, webhook idempotency, and reconciliation.
• Develop robust PostgreSQL schemas for financial data, manage migrations, and ensure correct transaction isolation and locking.
• Implement event‑driven patterns using Kafka or RabbitMQ, choosing appropriate request‑reply or fire‑and‑forget designs.
• Turn specification documents into production‑ready code without relying on task breakdowns.
• Leverage AI coding assistants (Claude, Cursor, Copilot, etc.) daily for architecture decisions, code reviews, and documentation.

Required profile

• 7+ years of professional software engineering experience.
• At least 3 years building backend systems that process real financial transactions.
• Deep expertise in TypeScript and Node.js, with the ability to design NestJS services from scratch.
• Proven experience integrating payment gateways and handling complex financial workflows.
• Strong knowledge of PostgreSQL schema design, migrations, and transaction management.
• Hands‑on experience with event‑driven architectures (Kafka, RabbitMQ).
• Daily use of AI coding assistants and ability to articulate their impact on your workflow.

Required skills

• TypeScript
• Node.js
• NestJS
• PostgreSQL
• Kafka
• RabbitMQ
• M‑Pay, Stripe, Adyen integration
• STK push flows
• Webhook idempotency & signature verification
• AI coding assistants (Claude, Cursor, Copilot)