Senior Software Engineer - MERN Stack

Feature delivery: Deliver new features, enhancements, and bug fixes across the stack, from database schema through to the web application and the public API.

API development & integrations: Develop and implement API integrations between the platform and internal and third-party SaaS systems, and extend the platform's public API.

System design & architecture: Design scalable, reliable, and secure services and infrastructure, applying solid API design principles such as versioning, security, and performance.

Workflow automation: Build and maintain event-driven services and scheduled jobs that automate workflows across connected systems.

Technical direction: Help steer the technical direction of the platform alongside the engineering team and Product.

Documentation: Produce clear, comprehensive documentation of system architecture, integrations, workflows, and implementation details.

Team growth: Help grow the in-house technology function by recruiting, mentoring, and line managing junior engineers as the team expands, fostering technical best practices and knowledge sharing.

You will work with both technical and non-technical stakeholders, so you should be able to explain complex technical concepts clearly and build strong working relationships across the business.  

Cross-functional teamwork: Proven ability to work effectively across teams and departments in a collaborative, partnership-driven environment.

System design: Good understanding of designing and building scalable, reliable, and secure systems.

Backend development: Strong professional experience with TypeScript and Node.js building backend services and REST APIs.

Frontend development: Solid JavaScript/TypeScript, HTML, and CSS, with working experience in React (ideally Next.js).

API integration: Strong knowledge of API design and implementation using REST, with familiarity with authentication methods such as OAuth2 and JWT, and experience with OpenAPI/Swagger. WebSockets a plus.

Databases: Strong understanding of relational databases, especially PostgreSQL, including schema design and migrations.

Cloud platform expertise: Proficiency with Google Cloud Platform.

Event-driven & workflow automation: Hands-on experience with message brokers or event-driven architectures (for example NATS, Kafka, or RabbitMQ) and scheduled/background jobs.

Containerisation: Experience with Docker for containerisation and Kubernetes for container orchestration.

CI/CD & version control: Familiarity with CI/CD pipelines and tools, especially Git and GitHub Actions.

Microservices frameworks such as Moleculer, and dependency injection with InversifyJS or similar (class-based OOP with decorators).

Type-safe ORMs such as Drizzle ORM, and Zod for schema validation.

Frontend tooling we use: TanStack Query, react-hook-form, TailwindCSS, Radix UI, and component-driven development with Storybook.

Building and documenting a public API and developer-facing docs; exposure to API-first or MCP-style tooling.

Infrastructure-as-code with Terraform, and running workloads on Google Kubernetes Engine.

Observability tooling: OpenTelemetry, Grafana/Loki, Sentry.

End-to-end testing with Playwright; Nx monorepo and pnpm workspaces.

Python for scripting and automation (Flask or FastAPI a plus).