Senior Fullstack Software Engineer, Startpage

About the role

Startpage is a private search engine with roots going back to Ixquick in 1998, owned by System1 (NYSE: SST) and competing with DuckDuckGo, Brave and Ecosia. We are expanding from search results into a broader set of consumer products for people who want privacy without giving up a modern experience.

You will be a senior full stack engineer on the Startpage Consumer team, a small North America-based group where every engineer works with AI coding agents as a core part of the job. You know how to run agents in loops, coordinate multiple agents on one problem, and judge their output critically. The stack is mostly Python and JavaScript. You will own features from first commit to production across the web frontend, backend services and data pipeline, shape the architecture as the product grows, and pay down the tech debt that slows us. The team ships weekly, so your work reaches millions of monthly users within days.

This position is an onsite role requiring you to work in our headquarters located at 4235 Redwood Ave. Los Angeles, CA 90066.

What you'll work on: Expect to work across the full breadth of the product rather than one slice of it.

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New consumer products that extend Startpage beyond the search box, on desktop and on the web

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The search results page itself: new features for subscribers and for everyone, within the constraints of our search partnerships

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Real-time decisioning that shapes what a user sees for a given query

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The homepage and engagement features that bring people back

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Traffic quality and abuse prevention for a product that attracts automated traffic

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Data instrumentation and reporting so the team can see what is working

Responsibilities: -

Design, build and ship features end to end, from API and data model through to the UI

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Drive your work with AI coding agents: give them the tools, context and guardrails they need, run them in loops against a spec, orchestrate several agents in parallel on one problem, and review what they produce with a critical eye

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Turn interactive prototypes from product into production code, keeping the intent and cutting what does not hold up

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Own services in production on Kubernetes: deploys, monitoring, the on-call rotation, and the latency and uptime targets a search product demands

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Shape architecture decisions and lead tech-debt reduction so the codebase stays fast to change

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Protect user privacy in every design decision: no tracking, minimal data retention, and no third-party calls that leak queries

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Write automated tests as a matter of course

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Instrument features and read your own results in Sigma and Snowflake; propose the next iteration from the data