Senior Software Engineer

Oracle; Greater London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A leading technology firm in Greater London is seeking an experienced Backend Engineer to design and deliver cloud-scale DDoS protection. You will build high-performance detection systems, automate operations, and shape the technical foundation for customer-facing DDoS capabilities. The ideal candidate has 6+ years in backend systems, proficiency in Java or similar languages, and strong skills in networking and observability. This role presents an opportunity to make a significant impact through innovative engineering practices.

Qualifications

• 6+ years in backend systems with a focus on high‑scale and low‑latency environments.
• Strong design skills covering concurrency, performance tuning, and API design.
• Familiarity with DDoS or network security services and observability best practices.

Responsibilities

• Design and build low‑latency backend services for DDoS detection and mitigation.
• Implement scalable data and control planes with fault isolation and resiliency.
• Own operational readiness and create robust observability for high‑availability systems.

Skills

Building production backend systems

Java

Python

C++

Rust

Go

DevOps at scale

IaC expertise

Networking knowledge

Observability experience

Tools

Terraform

CI/CD

Job description

Join OCI to design and deliver cloud‑scale DDoS protection as part of our edge security platform.

You’ll design and ship high‑performance detection and mitigation systems, automate operations end‑to‑end, and help define the technical foundation for customer‑facing DDoS capabilities.

Basic qualifications

• 6+ years building production backend systems (at least 3 years in high‑scale or low‑latency environments).
• Proficiency in one or more of the following: Java / Python / C++ / Rust / Go.
• Strong preference for Java for control‑plane / services.
• Strong systems design skills: concurrency, memory management, performance tuning, API design, and distributed systems fundamentals.
• Experience with DevOps at scale: CI / CD, automated testing, canarying, rollout / rollback, and configuration management.
• IaC expertise (e.g., Terraform) and solid cloud infrastructure fundamentals.
• Familiarity with DDoS or network security services and related attack / defense patterns.
• Solid networking knowledge: TCP / IP, IPv4 / IPv6, BGP fundamentals; DNS / DHCP understanding.
• Observability experience (metrics, tracing, alerting) and operational excellence mindset.

Preferred qualifications

• Experience with anycast routing, traffic steering, and multi‑region service readiness.
• Exposure to SDN, programmable data planes, or hardware mitigation platforms.
• Advanced telemetry / streaming pipelines for near‑real‑time detection (e.g., high‑rate packet / flow analytics).
• Background in resilience engineering, chaos testing, and capacity planning at hyperscale.
• Containerization / orchestration experience and secure service‑to‑service communication (mTLS, policy).
• Familiarity with zero‑trust principles, segmentation, and modern security architectures.

How you’ll have impact

• Ship core DDoS detection / mitigation capabilities that protect OCI’s Tier 0 availability.
• Enable new customer‑facing DDoS offerings with self‑service policy and visibility.
• Raise engineering quality, automation, and compliance maturity across the stack.

Ways of working

• Security and privacy by design; auditable controls and policy adherence from day one.
• Data‑driven delivery with clear KPIs, SLOs, and stage gates from prototype to GA.
• Collaborative, inclusive engineering culture with code reviews, design docs, and knowledge sharing.

What you’ll do

• Design and build low‑latency backend services for DDoS detection, classification, and mitigation across OCI’s global edge.
• Implement scalable data and control planes (policy, signaling, telemetry, orchestration) with strong fault isolation and resiliency.
• Develop traffic engineering capabilities (anycast, BGP signaling, routing policy) and integrate with OCI networking, DNS, and edge services.
• Own operational readiness: SLOs / SLAs, on‑call health, incident response, runbooks, and post‑incident improvements.
• Build automation‑first workflows: CI / CD pipelines, test frameworks, canary / blue‑green releases, and infrastructure‑as‑code.
• Create robust observability (metrics, logs, traces) and capacity / scale modeling for high‑throughput, high‑availability systems.
• Partner with product, SRE, and network engineering to deliver roadmap features from concept to GA with security‑by‑design.
• Contribute to threat modeling, architecture reviews, and compliance / audit readiness for Tier 0 services.