Senior Backend Engineer (Node.js / gRPC / Integrations)

About the Project

Greenfield modular B2B platform for vendor–partner collaboration and sales automation.

Our Tech Stack

Please apply only if you have strong experience with this stack – we’re not considering non-Node environments at this time.

Backend / Platform:

•  Node.js / NestJS
•  PostgreSQL, Redis, RabbitMQ
•  Supabase Auth SDK (used internally, replaceable later)
•  Kong API Gateway for token validation, routing, rate limiting
•  AWS ECS, RDS, S3, SES, CloudWatch, Secrets Manager, etc.
•  GitHub Actions (CI/CD)
•  Cloudflare (DNS/CDN)

API Layer:

•  gRPC for internal service communication
•  GraphQL via Apollo Server (central BFF handler behind Kong Gateway)
•  REST for third-party integrations (e.g. CRM sync)

Frontend (not your main focus, but important to understand context):

•  React, Next.js, MobX
•  Ant Design, SCSS Modules

Our roadmap includes modules for ZK-powered trust verification, blockchain-based data proof, and AI-driven analytics, scoring, and partner insights. You may be part of these initiatives as the platform scales.

What You’ll Do

As the Core Backend Engineer, you’ll be foundational to the project – helping shape the architecture in close collaboration with the CTO and building the platform from the ground up.

You’ll be responsible for implementing microservices, building integrations, and managing backend logic that powers our GraphQL API and integrations with third-party platforms. You will:

• Design and implement scalable gRPC microservices using NestJS
• Own PostgreSQL schemas, gRPC proto contracts, and service definitions
• Integrate with external platforms like Salesforce, ConnectWise, Kaseya, and others
• Implement secure authentication flows (login, magic links, password reset, refresh)
• Handle JWT validation, sessions, and RBAC logic via Kong and auth-service
• Write structured logs, tracing, and health endpoints
• Ship clean, production-ready code deployed via ECS + GitHub Actions
• Configure and manage observability and security tooling (e.g. Datadog) across services

We’re not looking for someone to just "ship tasks". We want someone who questions requirements, brings better ideas, and treats the backend like their product.

Preferred Qualifications

• 8+ years of overall software engineering experience
• 5+ years working with Node.js / NestJS / TypeScript
• Strong expertise with gRPC and microservice architecture patterns
• Solid experience with AWS core services and Docker-based containerisation
• Experience designing and managing GraphQL schemas
• Experience with Supabase Auth or similar (Keycloak, ORY, Firebase)
• Proficiency with OAuth2, session management, and secure API design
• Understanding of web security threats and mitigation strategies (XSS, CSRF, SSRF, JWT handling, cookie protection, etc)
• Understands tradeoffs between performance, maintainability, and scale – and can justify decisions
• Experience designing service boundaries, data contracts, and owning production systems end-to-end

Nice to Have

• Ability to collaborate with frontend developers; familiarity with React
• Experience developing in Python or Go when needed
• Familiarity with blockchain or verifiable data architectures
• Interest in AI pipelines, scoring systems, or ML integration
• Experience working with compliance frameworks like ISO 27001, SOC2, or GDPR

What We Offer

• Competitive salary and meaningful ESOP
• Mostly remote, with onsite syncs in Sydney
• Ownership, not just tasks, no legacy, no micromanagement
• Ability to build greenfield systems with no blockers
• Deep ownership of architecture, integrations, and backend direction
• Space to focus on engineering with care about the quality, stability, and best practices
• Minimal bureaucracy, fast decisions, and direct collaboration with the founding team
• Technical growth opportunities as we expand into blockchain, ZK, and AI

Please note: full working rights in Australia are required.