Senior Full Stack Developer – Downdetector Connect NEW

Ookla
Overview

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.

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 optimise 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 containerisation (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 anonymisation techniques, data privacy and GDPR.
• PLUS: Domain: Understanding of network monitoring, telecommunications data, or performance testing.

Benefits

Competitive salaries, robust health and wellness focused benefits, paid time off, and opportunities for professional growth through mentorship, educational support, and career development resources.

Compensation Range

£50,000 to £80,000 base pay for this role.

Ziff Davis is an Equal Opportunity Employer. At Ziff Davis, Diversity, Equity, and Inclusion (DEI) has always been about fairness, equal opportunity, and belonging. DEI enables us to attract and retain the best talent, regardless of background or circumstances, while enabling our thousands of employees worldwide to thrive.