Senior Full Stack Developer - Downdetector Connect in London

The Opportunity: As a Senior Developer, you’ll have significant autonomy to shape how some of the world’s largest telecom operators communicate with consumers and detect issues across their networks. You’ll help evolve the platform into a proactive, intelligent system built around Observe - Think - Act workflows, designing autonomous, AI‑driven operations that surface insights, trigger actions, and streamline complex network processes at scale. You’ll work across the full stack, building intuitive interfaces in React and architecting resilient Python backend systems capable of handling massive volumes of time‑series telemetry. You’ll join a dynamic, experienced global product and engineering team, collaborating with specialists across mobile SDKs, cloud platforms, and large‑scale distributed systems, while working directly with global customers. If you’re excited by the challenge of building intelligent systems, solving complex data problems, and driving meaningful impact at global scale, this role offers the scope and technical depth to do your best work.

Key Responsibilities:

• Full-Stack Development: Develop and maintain robust, scalable web applications using React, Redux, and modern backend frameworks.
• Automation & AI Features: Move the platform from reactive reporting to proactive operations by implementing "Observe-Think-Act" loops for network outage detection and communication.
• Maintain Technical Quality: Write clean, maintainable, and efficient code while conducting high-signal code reviews to elevate engineering standards.
• Collaborate Cross-Functionally: Work closely with Product teams to translate emerging AI capabilities into high-performance features for our global operator clients.
• Scale Data Processing: Help maintain and optimize backend services capable of handling high-volume network telemetry and time-series data.

Experience integrating third-party APIs, AI services, webhooks and event-driven workflows into production applications.

Job Qualifications:

• 5 to 8 years of professional software engineering experience.
• Experience in mentoring or leadership.
• Strong proficiency in Python (FastAPI or Django) and experience designing scalable RESTful APIs.
• Proficient in React and Redux with hands‑on experience building complex, data‑heavy web applications.
• Hands‑on experience using AWS to build and scale web applications, including containerization (Docker/Kubernetes).
• Systems Thinker: Strong ability to break down complex manual problems into deliverable, automated technical sub‑tasks.
• PLUS: AI Frameworks: Hands‑on experience deploying AI agents into production or proven exposure to tools like LangChain, LangGraph, or LlamaIndex.
• PLUS: Experience with anonymization techniques, data privacy and GDPR.
• PLUS: Domain: Understanding of network monitoring, telecommunications data, or performance testing.

About Ookla, an Accenture company, is a global leader in connectivity intelligence that brings together the trusted expertise of Speedtest®, Downdetector®, Ekahau® and RootMetrics® to deliver unmatched network and connectivity insights. By combining multi‑source data with industry‑leading expertise, we transform network performance metrics into strategic, actionable insights. Our solutions empower service providers, enterprises, and governments with the critical data and insights needed to optimize networks, enhance digital experiences, and help close the digital divide. At the same time, we amplify the real‑world experiences of individuals and businesses that rely on connectivity to work, learn, and communicate. From measuring and analyzing connectivity to driving industry innovation, Ookla helps the world stay connected.

About Accenture: Accenture helps the world’s leading enterprises reinvent by building their digital core and unleashing the power of AI to create value at speed for organizations across industries. Our strategy is to be the reinvention partner of choice for our clients and lead in the safe, widespread adoption of AI, and to be the most client focused, AI‑enabled, great place to work in the world. We bring together the talent of our approximately 799,000 people with proprietary assets and platforms, deep process and industry expertise, and leading ecosystem relationships to deliver end‑to‑end solutions and measurable outcomes at scale.

Compensation Range: Ookla provides a range for the base pay. Factors that may be used to determine your actual pay may include your specific job related knowledge, skills, experience, and geographic location. The salary compensation for this role is £50,000 to £80,000 annually. Individual pay within the compensation range for this business unit specific role is determined based on a variety of factors including experience, scope of the role, capabilities to perform the role, education and training, as well as business and company performance.