Senior Software Engineer (Architecture-Focused) Hybrid — London £70,000 - £80,000 Benefits We’re partnering with a global adtech firm. They’re now looking for a Senior Software Engineer with architectural exposure to help design and deliver key platform components while remaining hands-on across Python, TypeScript/React, and Google Cloud. The Role You’ll play a hybrid role across system design, coding, and delivery, working closely with the CTO. Expect a healthy mix of: Architecture & Technical Direction Contributing to the system design and technical roadmap for core scheduling and automation services Helping define engineering standards across API design, data models, observability, and CI/CD Supporting decisions on storage models, service boundaries, orchestration flows, and event-driven patterns Hands-On Engineering Building backend services in Python (APIs, async workflows, automation pipelines) Developing UI components in React/TypeScript for internal tools and dashboards Working in a GCP environment (Cloud Run, Cloud Functions, Pub/Sub, BigQuery, Firestore) Optimising end-to-end performance of scheduling engines and workflow automation Collaboration & Delivery Working with Product, Content Ops, and channel teams to translate real-world workflows into scalable technical solutions Reviewing code, supporting mid-level engineers, and contributing to release quality Communicating trade-offs and technical decisions clearly to non-technical stakeholders What You’ll Bring Strong backend experience with Python (APIs, async, production systems) Solid React/TypeScript experience for dashboards or internal tools Hands-on exposure to Google Cloud (Cloud Run, BigQuery, Pub/Sub, Firestore, etc.) Experience building distributed or workflow-based systems (pipelines, schedulers, ETL, automations) Ability to contribute to architectural discussions and improve system design A pragmatic mindset: balancing engineering quality with delivery Nice to Have Experience with digital media, content workflows, or YouTube APIs Familiarity with Airflow, Composer, Dagster, or Prefect ML/AI awareness (classification, embeddings, tagging workflows) Experience with high-throughput scheduling or rules engines Please apply!