Quanloop is building and running a security‑sensitive investment platform. We are hiring multiple Front-End Engineers (React) in Budapest to build and evolve the web UI and ship user-facing features with predictable behaviour and clean integration.

Your home office is Budapest and the role is office‑first.

This is a React-focused engineering role. You will work closely with Back-End Engineers (Java) and UI Developers (HTML/CSS) to deliver complete features without unnecessary handoffs.

Role snapshot

• Working model: Office‑first (on‑site).
• Hiring basis: Local hiring for the Budapest office location.
• Onboarding: Budapest is the home office.
• Language: English‑first working language.
• Reporting line: You report to a Tech Lead; Tech Leads report into Head of Engineering and/or the CTO.

What you’ll be responsible for

• Build and maintain React UI for product features and workflows.
• Integrate UI with backend APIs and handle edge cases cleanly.
• Work with UI Developers (HTML/CSS) on implementation details, consistency and accessibility basics.
• Keep UI code maintainable: clear structure, reviewable changes and predictable behaviour.
• Partner with Product Owner and QA on scope, acceptance criteria and release readiness.
• Collaborate with Infrastructure on constraints that affect front-end delivery (performance, operational readiness, and safe change).
• Contribute to practical documentation and written decisions where it helps teams move.

What success looks like in the first 3–6 months

• You ship UI changes that are stable, readable and easy to extend.
• Integrations with backend services become smoother and more predictable, with fewer avoidable regressions.
• Delivery coordination improves through clearer ownership and cleaner handovers across front-end, back-end and UI implementation work.

What we’re looking for

• Strong commercial experience building production React applications.
• Comfortable integrating UI with APIs and handling real-world complexity (not toy examples).
• Solid HTML/CSS fundamentals (you don’t need to be the HTML/CSS specialist, but you must understand the basics).
• Comfortable with code review and shared engineering standards.
• Fintech or regulated/high‑scrutiny environment experience is preferred.
• Clear written and spoken communication in English.
• Comfortable working on site with a team.

Growth opportunity

Some senior hires with both Java and React experience may take on technical leadership scope within delivery teams.

Before you apply

If you want more context before applying, the pages below may be useful:

• Benefits and rewards — details on health cover, time off, learning support and role-dependent bonus arrangements
• Our offices — information on our office-first model and locations
• Teams at Quanloop — an overview of how teams work and where this role sits
• Our story — background on the company and the way we work

This is optional reading, but it should give you a better sense of what to expect before you apply.

Seniority assessment

If you want a better sense of how we assess engineering seniority, you can read the pages below before applying:

• How we assess seniority — an overview of how practical seniority is assessed in our hiring process
• Front-end engineer (React) assessment task — the task used in the technical assessment for this role

Reading them before applying is optional, but some candidates find it useful as a quick check of the expected level.

If you reach the technical interview stage, we ask that you read both pages in advance. The task is discussed during the interview, so candidates are expected to be familiar with it beforehand.

How to apply

Apply with your CV (LinkedIn optional). A short note is welcome, but not required.