Rust and WebAssembly Developer

Senior Full-Stack Engineer (TradeTerm)

Railsware

We’re building a Trading Terminal— a platform for reviewing and replaying trades, designed for prop firms and traders. It combines order flow visualization with replay, audit, and execution in one system. We work in a spec-driven way: we plan before we build. If you’re a senior engineer who actively trades and cares about building better trading tools, this role is for you.  THE TEAM We’re a small founding team: 2 co-founders and 1 engineer (you would be the second), plus part-time support in Product, DevOps, and Compliance + access to a senior Railsware Director with experience shipping many products. Yaroslav Lazor — engineering & product (previously worked on Calendly) Umar Ashraf — markets & distribution (runs a 4M+ YouTube trading channel, founder of Tradezella) WHAT YOU’LL GET * Ownership — you’ll be involved in the full process: from specs to shipping. No ticket queue. * Product connection — you’ll use the product yourself as a trader. * AI-first team — we use AI as part of how we plan, research, and build, not just as a helper tool. * Working style — flexible. We collaborate when needed and work independently when it’s more effective. We focus on results. * Working style — outcome-driven. We combine synchronous collaboration with focused asynchronous work, choosing the approach that best supports effective outcomes.   WHO WE’RE LOOKING FOR A senior full-stack engineer who is also an active trader. This role requires both strong engineering skills and real trading experience. If you only code or only trade, this is probably not the right fit. We’re looking for someone who is comfortable working across product, technology, and trading. REQUIREMENTS * 5+ years of engineering experience * Comfortable across backend systems, including low-latency backend * Experience with modern frontend frameworks ( React 18+ / TypeScript) * Active trader: futures or crypto, day trading or scalping * Spec-driven, AI-orchestrated development: you plan deeply and know how to work with AI agents effectively * Experience with real-time market data: WebSocket streaming, order books, Level 2 depth * Ability to produce your own product specs * Ability to make UX decisions based on the UX guide and input from a UX advisor * Fluent English (written and spoken) Would be a plus:  * Rust (we use Rust/Axum), Experience with high-performance browser rendering (e.g. WebAssembly, ImGui, egui) * Familiarity with trading tools like footprint charts, DOM/ladder, heatmaps, market/volume profile, CVD WHAT YOU’LL WORK ON (FIRST 90 DAYS) * Building real-time market data pipelines (Level 2 data, order book reconstruction) * Developing order flow visualizations (footprints, heatmaps, DOM, profiles, CVD) * Improving the trading interface (charts, DOM, tape, order panel working together) * Preparing live data features for partnerships with prop firms * Integrating with market data providers

Staff Security and Privacy Engineer

Brave

STAFF SECURITY AND PRIVACY ENGINEER Remote ABOUT BRAVE Brave is on a mission to protect the human right to privacy online. We’ve built a free web browser that blocks creepy third-party ads and trackers by default, a private search engine with a truly independent index, a browser-native crypto wallet, and a private ad network (opt-in!) that directly rewards you for your attention. And we’re just getting started. Already 110+ million people have switched to Brave for a faster, more private web. Millions more switch every month. The internet is a sea of privacy-harmful ads, hackers, and echo chambers. Big Tech makes huge profits off our data, and tells us what’s true and what’s not. Brave is fighting back. Join us! SUMMARY We are hiring a staff engineer on the Brave security and privacy team! You will help keep our users safe across Brave’s products, including Brave browser and Brave Search. Responsibilities include: 1. Security and privacy reviews of Brave browser and Brave Search 2. Triaging and fixing security reports 3. Working closely with other teams to design privacy-preserving protocols 4. Designing and implementing new security and privacy features Brave is widely-recognized as one of the best browsers for security and privacy, doing industry-leading work with a team that’s a fraction of the size of Big Tech-supported browsers. REQUIRED QUALIFICATIONS * At least 5 years experience (or equivalent) in security or privacy engineering * Experience in penetration testing and/or security auditing * Strong proficiency in C++, both implementing and reviewing * Strong familiarity with the Web security model * Understanding of data protection fundamentals * Very comfortable working and communicating async with a geographically-distributed software development team * Be comfortable diving into an extremely large, unfamiliar and complex codebase * Be comfortable with Git and collaborating on GitHub PREFERRED QUALIFICATIONS * Experience contributing to large open source codebases and/or participating in open source communities * Proficiency in Web technologies (HTML, CSS, JavaScript)  * Proficiency in Go and Rust * Contributions to other Web browsers * Familiarity with Chromium's architecture, especially security * Ability to write clear technical documentation and less technical writing for blog posts or public communication.  * Be excited about privacy, anonymity, and censorship resistance! Working at Brave * Industry-leader in privacy, with an award-winning security and privacy engineering team that’s innovating everyday to keep people safer online and beat Big Tech * Unlimited PTO in the US, 20 days + your birthday in Canada and similar PTO policies in countries where we have a presence * Highly competitive salaries & benefits * Generous home-office stipends * Fully remote team (no office, no commute) with a very-low-meeting culture * Welcoming, humble, ridiculously smart teammates, and a truly flat org structure * Opportunity to get in early at a hyper-growth company, and revolutionize the web * Oh, and did we mention Brendan Eich, our CEO & co-founder, invented JavaScript? Check us out www.brave.com!

Dataframe SDK Engineer

Rerun

At Rerun, we’re building the data stack for Physical AI. Large parts of the physical-world economy will be transformed by intelligent products, and we're developing the data infrastructure and tools that make it possible. Our open-source project focuses on logging and visualizing multimodal data and is already loved by some of the best teams in the world. We’re now building our commercial platform — managed infrastructure for ingesting, storing, analyzing, and building training data pipelines for Physical AI at scale. We’ve built an exceptionally senior, talented engineering team. Now we’re looking for a DataFrame SDK Engineer to own and expand the developer experience for querying and working with Rerun’s data — improving performance, ergonomics, and integrations across our Python and Rust SDKs. This role sits at the intersection of API design, query performance, and developer experience, and will have a direct impact on how customers adopt and build on top of Rerun Cloud. WHAT YOU’LL DO * Build a world-class query and dataframe SDK that makes exploring data in Rerun intuitive and powerful * Work across Python, Rust, and gRPC layers to add new operations and integrate with our distributed backend services * Push performance improvements through better query planning, push-down logic, and dataset versioning * Contribute documentation and examples that make the SDK easy to adopt * Collaborate with other engineers on dataset creation, versioning, and catalog interfaces WE’D LOVE IT IF YOU HAVE * Experience building or contributing to Python data APIs, ideally dataframe-style APIs (e.g. Pandas, Polars, Arrow, Snowflake, or similar) * Strong experience in Python and Rust, or a language-agnostic background with proven ability and motivation to pick up Rust rapidly. * Experience writing high-performance software and debugging across Python, Rust, gRPC, and distributed systems * Proven ability to take projects from start to finish with limited hand-holding — you’re comfortable owning a slice of the stack and iterating quickly * Empathy for developers and a sense of taste for clean, ergonomic API design BONUS POINTS IT IF YOU HAVE * Experience with Apache Datafusion or Apache Arrow * Familiarity with query planners, compilers, or execution engines * Experience working on data-oriented or multimodal data systems (e.g., robotics, physics modeling, or simulation pipelines) * Knowledge of async Rust or similar concurrent programming models HOW WE WORK AT RERUN * We're a remote company headquartered in Stockholm, Sweden. * We meet up in person for a week roughly once a quarter * The team you'll join has members in European and US-East Coast timezones * You should be available for synchronous work between 1:30–5:00pm CET. Given our current team distribution, candidates outside of Europe or the US will be considered on a case-by-case basis to ensure there’s enough overlap for effective collaboration. * We've put together an uncommonly talented tech team, value agency and helpfulness highly, and expect everyone to take broad responsibility for what they build * We offer competitive cash and equity compensation, six weeks paid vacation, and whatever hardware and software you need to do your job