Requirements

5+ years of professional experience building and shipping full-stack web applications
Strong experience with React and TypeScript, and with Python (Django or similar) backed by a relational database such as PostgreSQL - depth in one side and real competence in the other is fine
A track record of driving non-trivial projects end to end, including the parts that require getting other teams to agree with you
Comfort designing and building data-heavy interfaces where the shape of the data is messy and the volume is large
Excellent written and spoken English communication skills
Experience leveraging AI-powered development tools to enhance productivity and code quality
You live in the Vienna area or are willing to relocate for this role

Nice to Haves

You've built something real with LLMs or agent frameworks and know their failure modes first-hand
Familiarity with the application monitoring and observability space, or with OpenTelemetry
Experience querying large-scale analytical data stores (ClickHouse, or similar)
Experience building developer-facing products, SDKs, or public APIs
A track record of contributing to open-source projects

Own projects end to end. Take a problem from a rough customer complaint through scoping, design, implementation across the stack, rollout, and measurement. You'll write the design doc, cut the work into shippable pieces, and stay with it until the numbers move.
Build the views developers debug agents in. Multi-agent workflows, conversation replay, cost and token breakdowns, the moment where a run failed and why. Making a deeply nested, wildly variable trace legible is a genuinely hard interface problem.
Make the data underneath fast and queryable. Filtering and sorting millions of conversations, getting cost calculation right, and designing APIs that both humans and other people's agents can use well.
Detect the failures worth flagging. We're expanding from showing developers what happened to telling them what went wrong - common agent failure classes surfaced as issues, not as something you have to go looking for.
Take the friction out of getting started. Setup should be trivial on any stack, whether a developer wires it up by hand or asks their coding agent to do it.
Collaborate daily with product managers, designers, SDK engineers, and other product engineers. You'll bring the technical perspective that makes a design better, explain constraints in terms of what they cost the user, and sweat the details other people skip: empty states, error messages, loading behavior, the edge case that only bites 2% of accounts.

We are obliged by law to quote the minimum wage of EUR 60,844,-- gross per year for this position, in accordance with the respective collective agreement (IT-KV). The salary that Sentry offers you is adjusted to the current market situation and will be above the IT-KV.
A successful candidate will be eligible to participate in Sentry’s employee benefit plans/programs applicable to the candidate’s position (including incentive compensation, equity grants, paid time off, and group health insurance coverage).
Sentry is committed to providing equal employment opportunities to its employees and candidates for employment regardless of various characteristics. We strive to build a diverse team, with an inclusive culture.