Remote senior frontend engineer in Portland

Senior Frontend Engineer

Remote (UK-based) | Full-Time

About Us 2026 OTC Trading Platform of the Year ( ). Our network handles over $50 billion in daily trading volumes across FX, Equities, and Cryptocurrency, connecting 40+ of the world's leading liquidity providers. The Role What You'll Work On Type Script and Rust — from trader-facing interfaces to the application services behind them What We Need

Technical:

Type Script / Java Script (ES6+) (5+ years) React and reactive state management (RX, Mob X, or similar) 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

Python for scripting, automation, and tooling is a bonus

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

What You Get

Real problems — trading systems where performance is measured in microseconds, not user clicks

An excellent team — senior engineers who care about craft, collaborate openly, and hold each other to high standards

Ownership — small teams, clear accountability, direct impact on the platform and our clients

Competitive package — up to 30 days leave + bank holidays, private health insurance, pension, life insurance, dental/optical cashback, cycle to work, socials and offsites

Remote-friendly — work from home with flexibility. We trust our people to deliver

Sustainable pace — we work hard, but we don't burn people out. Balance is how we stay sharp

Growth — career progression to senior roles, performance specialisation, or technical leadership. We invest in people who invest in us

Our Hiring Process Stage 1: Initial Conversation with Talent Acquisition
Format: Video call, ~30-45 minutes

Stage 2: Hiring Manager Conversation with the relevant team lead or hiring manager
Format: Video call, ~60 minutes

Stage 3: Technical Interview with two members of the relevant engineering team
Format: Video call, interactive session, ~60 minutes How to Apply Right to Work: Candidates must have the existing right to work in the UK. We are not currently able to offer visa sponsorship for this role.

Equal Opportunities: Reactive Markets is an equal opportunities employer. We welcome applications from all qualified candidates regardless of age, disability, gender reassignment, marriage or civil partnership, pregnancy or maternity, race, religion or belief, sex, or sexual orientation.

Reasonable Adjustments: If you need any adjustments or support during the application or interview process, please let us know — we're happy to accommodate.

Data Protection: By applying, you consent to Reactive Markets processing your personal data for recruitment purposes, in line with our.