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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer - **Company:** Reactive Marketing LLC - **Location:** United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Application Services, C++ (Programming Language), Code Review, Data Presentation, Software Debugging, Linux, Distributed Systems, Python (Programming Language), Network Protocols, TypeScript, WebSocket, ReactJS, Backend, Git, Real Time Data, Front End Software Development, Api Design, Restful APIs, Es2015 - **Published:** August 15, 2026 - **Apply:** https://arc.dev/remote-jobs/j/redirect/pb8vvkpthi ## About the Role * Strong full-stack engineering ability with deep TypeScript / JavaScript (ES6+) (5+ years) * Solid experience with React and reactive state management (RX, MobX, or similar) * Real working ability in Rust - it's part of our stack and not optional at this level. If your Rust is still developing, a strong track record of picking up new languages to depth quickly is essential * Strong grasp of distributed systems, API design, and real-time data (REST, WebSockets, network protocols such as TCP/UDP and binary protocols) * Comfortable reasoning about architecture and making defensible technical trade-offs * Python for scripting, automation, and tooling is a bonus * Git and Linux fundamentals * Experience in financial services or trading technology is a plus but not essential How you work: * You ship. You're delivery-focused - you iterate, you improve, you get things into production * You run with things. Give you an ambiguous, complex problem and you drive it to done without being managed through it. Senior here means trusted, not just experienced * You have range. You're not just strong in the familiar parts of the stack - you pick up the unfamiliar and hold your own on the hardest work * You own it. When you build something, you take responsibility for its behaviour in production. You respond to incidents (15-minute acknowledgement SLA during working hours), investigate issues, and close the loop * You raise the bar. You review peers' work thoughtfully, mentor the engineers around you through the craft, and set a standard others calibrate to * You write things down. Documentation is not an afterthought - it's how we scale knowledge across a distributed team. If it's not written down, it doesn't exist * You communicate. We're a distributed team across multiple time zones. Clear, proactive communication - especially when things go wrong - is essential * You embrace AI tooling. We use AI tools (Claude, Gemini) to amplify our engineering capability - from code review and debugging to incident investigation and documentation. You don't need to be an expert, but you should be curious and willing to learn ## Description We're looking for a senior full-stack engineer to join our frontend team to build the trading platform our clients use every day. Despite the "frontend" name, this is not a UI-only role - our Frontend team works across the whole application stack in TypeScript and Rust, from the trader-facing interfaces down to the services behind them. It's distinct from our Backend team, who own the low-latency C++/Go trading engine. This is a senior individual contributor role for someone who takes on the hardest problems and delivers them under their own steam. You'll own complex, ambiguous, performance-critical work end-to-end - designed, built, tested, deployed, and supported in production. You lead through code, craft, and mentoring, setting the technical example the rest of the team calibrates to. This is not a role where you write code and throw it over a wall: our engineers own the full lifecycle, and when something breaks, you're part of the team that investigates and fixes it. Occasional hours outside the normal working day are required for production releases, scheduled maintenance windows, and Level 3 support during critical incidents. We keep this to a minimum and recognise the commitment - but owning a production trading platform means being there when it matters. What You'll Work On * Complex full-stack features in TypeScript and Rust - from trader-facing interfaces to the application services behind them * Real-time market-data presentation and high-throughput, low-latency application code across FX, Equities, and Cryptocurrency * React and reactive state management (RX, MobX, or similar) for demanding, data-dense trading interfaces * Distributed systems and real-time data over REST, WebSockets, and network protocols * Architecture and solution design for the hardest technical problems the team faces * Observability and monitoring - dashboards, alerting, and metrics that make frontend behaviour visible * Production systems that handle real money - reliability is not optional ## Related Videos - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [WeAreDevelopers LIVE – AI, Freelancing, Keeping Up with Tech and More](https://www.wearedevelopers.com/videos/1786-wearedevelopers-live-ai-freelancing-keeping-up-with-tech-and-more) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) ## Related Articles - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)