Topstep

Staff Software Engineer, Trading Platform - Charts

United States · Staff+ · Full-time

Sponsorship not specified$200k-$225kDetected 8 days ago

TypeScriptReactReact NativeCode ReviewAPI DevelopmentRESTWebSocketsData EngineeringData VisualizationCommunicationCollaboration

About the role

The library is organized as overlapping rendering layers - candles, grid, indicators, positions, drawings - most rendered on Canvas 2D.
A WebGL layer may be added later for higher-density visualizations.

Design and build core systems of the charting engine - rendering primitives (layer system, hit testing, dirty-region rendering, text measurement) and domain features (drawing tools, indicator math).
Own the framework-agnostic core library architecture, including the public API that React, React Native, and direct consumers integrate against.
Build and maintain the React binding - the thin wrapper layer that adapts the core's public API into framework-native components, hooks, and lifecycle integration. The React Native binding follows as the mobile app matures.
Drive architectural decisions on canvas compositing, layer strategy, and main-thread vs. worker-thread boundaries.
Build the data integration layer that bridges the existing real-time data pipeline into the charting engine.
Lead architectural reviews and RFCs for the charting library, driving consensus on library architecture across the trading platform without direct authority.
Mentor engineers on the charting team through code reviews, design reviews, pairing, and technical coaching.
8 + years of frontend engineering experience building and shipping production systems.
Prior experience building or contributing to a production charting library, data visualization framework, or comparable interactive rendering system.
Discipline around visual testing - pixel diffing, deterministic replay-based tests, and willingness to write and maintain them.

Deep proficiency in TypeScript including strict mode, advanced generics, and designing public APIs that other engineers consume.
Deep proficiency in React, including production experience designing component libraries, hooks APIs, or framework binding layers.
Production experience with frontend graphics rendering, particularly Canvas 2D - multi-layer compositing, dirty-region rendering, and text metrics.
Production experience with Web Workers and SharedArrayBuffer - zero-copy data pipelines, typed-array views over shared memory, Atomics for generation counters, and off-main-thread compute architecture.

Production experience with real-time streaming systems - WebSocket lifecycle, backpressure, reconnection, and replay.
React Native, react-native-skia, expo-gl, or JSI experience.
Order flow and market microstructure knowledge - footprint charts, volume profile, DOM, cumulative delta.
MessagePack or protobuf experience for binary serialization on the data pipeline.
WebGL2 experience - for a possible future high-density rendering layer.
WebGPU / WGSL experience (long-term migration target).
Rust + WASM experience (the indicator compute layer is the most likely candidate for a Rust rewrite).
PineScript or other charting DSL familiarity (for transpiler/runtime work in a later phase).

Notice Pursuant to 775 ILCS 5/2-102(L).
Topstep LLC uses artificial intelligence ("AI") in connection with its recruitment and hiring process.
The core has no framework dependencies; the bindings are thin wrappers above it.

Balance technical debt with feature delivery based on long-term library health and consumer needs.

Employer
Topstep is an Equal Opportunity Employer. We are committed to fostering an inclusive environment where all employees and applicants are valued. All qualified candidates will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, age, disability, or veteran status, in compliance with applicable federal, state, and local laws.
Interested in the role? Apply today with your resume!
Notice of Use of Artificial Intelligence in Recruitment and Hiring: Notice Pursuant to 775 ILCS 5/2-102(L). Topstep LLC uses artificial intelligence ("AI") in connection with its recruitment and hiring process. Examples include, but are not limited to, AI tools used to improve job descriptions, generate interview questions, draft communications, assist with scheduling, and source candidates, as well as AI features built into third-party platforms such as LinkedIn, Indeed, and Glassdoor. Topstep will not use AI that has the effect of subjecting employees or applicants to discrimination on the basis of any protected class under the Illinois Human Rights Act.

This listing is sourced directly from Topstep's careers page and normalized into a canonical job model.