Senior Software Engineer II Job at Axon (London)

Job Description

Axon’s Real Time Operations (RTO) division builds situational awareness software that helps emergency responders manage life-and-death incidents. You will lead the design and scale-out of the cloud control plane that provisions, secures, and orchestrates Axon’s global IoT device fleets. The systems you build will ingest and act on real-time signals at planet scale, with tight SLOs for command/response and device health. Your work will directly improve response times, reduce cognitive load for dispatch and command center operators, and increase responder safety.

Job Responsibility

Own control-plane architecture for multi-tenant, planet-scale IoT fleets: device provisioning and lifecycle, device identity & PKI, configuration/state management (twin/shadow), command & control, policy/RBAC enforcement, OTA updates and rollout strategies, and authoritative device state
Drive reliability, safety, and security-by-design: zero-trust defaults, mutual TLS, certificate rotation at scale, least-privilege key management (HSM/KMS), robust secrets hygiene, threat modeling, and defense-in-depth for multi-tenancy
Lead cross-org technical strategy: set engineering standards (APIs, versioning, deprecation, rollout, testing), create long-range roadmaps, and mentor/level-up senior engineers across cloud and device teams
Partner with device teams on transport and protocol choices, schema and API contracts, edge–cloud sync models, staged rollouts, failure injection, and field-safe rollback
Establish end-to-end observability (metrics, tracing, structured/audit logs), actionable dashboards, incident response runbooks, and capacity planning with empirical load testing and cost guardrails

Requirements

10+ years building and operating distributed systems at scale
proven track record of owning critical paths and SLOs
Deep expertise in control planes, service discovery, orchestration, partitioning/placement, and consistency models (CAP tradeoffs, CRDTs, leader/follower, quorum)
Strong coding in Go (also acceptable: Java/Rust)
design-first mindset, profiling and performance tuning (allocations, tail latency, lock contention)
Cloud-native foundations: Kubernetes, containers, service mesh (Istio/Envoy), gRPC/HTTP/2, backpressure and circuit-breaking patterns
Streaming/eventing: Kafka/NATS/Pub-Sub, schema evolution (Protobuf/Avro), idempotency keys, and exactly-once vs at-least-once tradeoffs
Security: mTLS, OAuth/OIDC, JWT, x.509, HSM/KMS, structured threat modeling and mitigation

Nice to have

IoT protocols & fleet ops: MQTT, WebSockets, device twin/shadow patterns and FIDO Device Onboarding (FDO)
Hardware root of trust: TPM / TPM 2.0 fundamentals—measured/verified boot device identity & remote attestation, key sealing/unsealing—and integrating TPM-backed identity with cloud HSM/KMS
Large-scale telemetry pipelines, time-series storage, adaptive sampling, backpressure, and edge–cloud synchronization
Multi-region active/active, blue/green and canary for device fleets, ring-based or attribute-based rollout tooling with automatic pause/rollback
Experience in regulated or safety-critical domains (e.g., public safety, medical, automotive), with audit and compliance rigor

What we offer

Competitive Base Salary
Annual Bonus and Restricted Stock Unit Eligibility
Comprehensive Pension Plan with Matching Contribution
30 days paid holiday in addition to UK public holidays
Enhanced Maternity and Paternity Leave for all employees
Private Health Insurance
Cash Plan including Dental, Optician and Therapeutic Treatment Plans
GymPass Subscription
Life assurance (x4 Annual Salary)
Group income Protection
Employee Assistance & Development Programs

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Senior Software Engineer II

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