Lead Software Engineer

🕒 April 15

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Voltex Electrical Accessories

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2001

🔧 Hardware

Hardware

Voltex Electrical Accessories is Australasia's fastest-growing electrical brand, catering to both Australia and New Zealand. It provides a range of electrical products and accessories, supporting various regional customer needs via its dedicated websites and contact numbers. Known for its rapid growth in the electrical sector, Voltex is becoming a key player in the market, offering quality products and services to its clientele.

📋 Description

• Own the backend architecture end to end — design decisions, standards, trade-off calls, and documentation — with no backend lead above you. • Defend the cloud-optional, minimal-footprint design philosophy across the team and with stakeholders, and resist feature creep that compromises the privacy model. • Lead technical design reviews and collaborate directly with the firmware and mobile leads to ensure the cloud, Hub, and App layers remain coherent. • Define and enforce engineering standards for API design, security posture, observability, and code quality. • Mentor engineers on the team and raise the technical bar across the backend. Hands-On Engineering • Design and deliver the MQTT relay broker with Mutual TLS 1.3, Hub UUID-based routing, and DoS-resilient connection handling. • Build and maintain the Installer Portal REST API — project management, AccessKey lifecycle, credential verification, and handover state machine integration. • Implement the analytic ingest pipeline with server-side payload filtering and GDPR-compliant retention policies. • Design PostgreSQL schemas and Redis caching strategies for installer project data, access control, and real-time sync. • Implement API security across all surfaces — OAuth2/OIDC, JWT, RBAC (Electrician vs Homeowner roles), rate limiting, and input validation. • Configure and manage AWS API Gateway for routing, throttling, and token validation, behind Cloudflare for external security and DDoS protection. • Own the CI/CD pipeline end to end — GitHub Actions → ECR → ECS Fargate (Sydney, production), with Render for dev environments. • Integrate OTA firmware distribution with Hub state-awareness — updates pause during PENDING_HANDOVER lockdown states. • Drive observability through OpenTelemetry → Grafana Cloud + Sentry — structured, trace-correlated logging via Serilog, diagnosable without accessing device payloads

🎯 Requirements

• 10+ years of backend engineering experience, with at least 3 years owning architecture in a technical lead capacity — not contributing to an architecture, but defining one. • Proven experience designing and shipping a connected device backend — you have built the cloud layer of an IoT system and can speak to every decision: protocol choice, relay vs. state-store model, provisioning flows, command pipelines, and security posture. Bonus if you have navigated the transition from an edge-first to a full cloud-connected architecture. • Deep understanding of IoT communication protocols — MQTT and/or AMQP at the infrastructure level, including broker design, QoS trade-offs, session management, connection resilience, and mTLS. Experience with AWS IoT Core and with custom broker implementations are both valued — AWS IoT Core comes into scope in Phase 2. • Security-first engineering mindset — you understand Zero-Trust models, end-to-end encryption architectures where the relay cannot inspect the payload, RBAC with multiple persona types, and IoT-specific threat modelling. Familiarity with Australia's IoT Code of Practice is a plus. • Strong command of C# and .NET 10 — Clean Architecture, CQRS, modern async patterns, dependency injection, hosted services, and performance-sensitive REST API design. Lightweight data access via Dapper or equivalent (full SQL control, no heavy ORM). Node.js or Go experience is also considered for auxiliary services. • Production-grade PostgreSQL — schema design, advanced indexing, query optimisation, and the judgment to keep a schema deliberately lean. MS SQL experience is a plus. • Redis for real-time state, pub/sub, and session management — including Redis Streams for event-driven patterns. • Container deployment in production — Docker and AWS ECS Fargate — including ownership of the GitHub Actions → ECR → ECS pipeline from commit to production. • Strong written and verbal communication — you can write a design proposal, run a technical design review, and explain an architectural trade-off to a non-technical stakeholder without losing precision.

🏖️ Benefits

• - Competitive salary and benefits package. • - Opportunity to work with a dynamic and innovative team. • - Professional growth and development opportunities.