Top Tech Jobs & Startup Jobs in London

Build and improve personalized running-training features, algorithms, and modeling components. Develop production-quality Python software, design testing approaches for accuracy and maintainability, and use data to guide training recommendations. Collaborate with coaches and cross-functional teams, mentor engineers, conduct code reviews, and support iterative development, deployment, and continuous improvement of consumer-facing applications.

Design mobile product experiences that help runners adapt training to missed runs, injuries, and changing goals. Responsibilities include user research, journey mapping, UX and visual design, prototyping in Figma, user testing, developer handoff, design system iteration, accessibility, and cross-functional collaboration with Product and Engineering. The role also contributes to design processes, workshops, quality standards, and inclusive product thinking.

Build, test and ship growth-focused user journeys and subscription funnels across web and app. Design and run experiments, implement instrumentation and tracking, own features end-to-end, collaborate with product/design/data, and improve CI/CD, testing and release workflows to increase conversion and engagement.

Lead analytics and measurement for performance marketing, defining KPIs, attribution models, dashboards, and experimentation frameworks. Analyze paid media effectiveness using MMM, MTA, incrementality testing, and A/B testing across channels and geographies. Partner with marketing, finance, strategy, and product stakeholders to translate complex data into actionable recommendations, build scalable SQL and Python solutions, and mentor junior analysts while establishing technical standards.

Lead architecture and technical strategy across multiple product teams while building and shipping full-stack features. Mentor engineers, promote AI adoption throughout the software development lifecycle, deliver LLM-backed capabilities, guide system evolution, own release processes, and support reliable continuous deployment. The role works across mobile, backend, integrations, cloud infrastructure, and production support while collaborating with Product, Design, and Engineering leadership.

Leads product design quality and direction across core user journeys, manages and develops a team of designers, provides hands-on craft leadership, runs design reviews, partners with Product and Engineering, and establishes design standards and culture. The role requires shaping design vision for a scaled consumer app while contributing to the broader design system and leadership team.

Lead and develop a team of 4–8+ engineers responsible for delivering product or platform outcomes. Own planning, execution, release quality, stakeholder alignment, technical standards, hiring, performance management, career development, and team effectiveness. Partner with Product, Design, and modelling teams to build mobile and backend features incorporating AI/ML capabilities. Drive high-quality, scalable systems and organization-wide engineering improvements in a fast-paced product environment.

The Senior Software Engineer II will architect, build, and deliver new features, collaborate with teams, mentor engineers, and improve developer tooling while leading deployment processes.

Lead Runna’s core product strategy and roadmap, manage a team of 10 product managers (including managers), partner with design, engineering, data and growth to drive activation, engagement and retention, set outcome metrics and operating rhythm, and represent the product with Strava leadership.

As a Senior Software Engineer, you'll architect, build, and deliver features, collaborate with teams, maintain CI/CD pipelines, and support team members in technical matters.