Senior Fullstack Software Engineer, Startpage

System1Los Angeles, CaliforniaOn-siteFull-timeSenior, 5–8 yearsListed 3 days ago

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About this role

What you'll work on:

Expect to work across the full breadth of the product rather than one slice of it.

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

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

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

- The homepage and engagement features that bring people back

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

- 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

- 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

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

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

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

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

- Write automated tests as a matter of course

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

- Work with outside partners and agencies so web and app experiences stay consistent

- Write clear tickets, PRs and design notes; review teammates' work the same day

Requirements:

- Daily, hands-on use of agentic coding tools: you can run agents in loops, write the evals that keep them honest, coordinate multi-agent workflows, and know when to take the keyboard back

- 5+ years of professional web development, owning both frontend and backend in production

- Strong Python, plus JavaScript or TypeScript, React, and modern CSS and HTML

- Hands-on with Docker, Kubernetes, Helm and Redis

- CI/CD and monitoring tooling, and AWS or a comparable cloud platform; comfortable being paged for what you ship

- Solid automated testing habits

- SQL fluency and the habit of checking your own feature's numbers after launch

- Care for performance: you know what a 100 ms regression costs on a search results page

- Clear written communication with a distributed team and outside vendors

Nice to have:

- Desktop browser or mobile app experience, especially Chromium, Electron or a shipped native app

- Prior search or privacy product experience

- Ads or recommendations systems, especially serving ML models at low latency

- Bot detection, fraud or abuse prevention

- SEO-driven site generation at scale

- Familiarity with EU privacy regulation

How we work:

- Small North America-based team, weekly releases

- Product work starts as a clickable prototype; engineers are expected to push back on it before building

- Agents do the typing; engineers own the architecture, the review and the outcome

- Data over opinion: every feature ships with instrumentation and a success metric

- Jira for tracking, GitHub for code, Sigma and Snowflake for analytics, Slack for the day to day