Lead Front End Developer

Arrow Financial Technologies (ArrowFin); Medellín; Híbrido; COP 180.000.000 - 280.000.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Private insurance

Education reimbursement

Strong team culture

Stable career path

Descripción de la vacante

A fintech company located in Medellín is seeking a Lead Front-End Engineer for their trading platform. This individual will spearhead the architecture and development of the trading application's client-side, promoting best practices among a dynamic team. Applicants should have at least 7 years of experience in web applications, proficiency in React and TypeScript, and a strong background in performance optimization. The role offers a hybrid working schedule and ample opportunities for career growth within the organization.

Formación

• 7+ years of professional experience building web applications.
• At least 2+ years in a Mid/senior or lead front-end role.
• Strong expertise with React and TypeScript in production environments.
• Experience building or leading real-time, data-heavy UIs (trading, analytics dashboards, monitoring tools).
• Deep understanding of component-based architecture and composition.
• Deep understanding of State management (Redux, Zustand, or similar).
• Experience with REST APIs; familiarity with WebSockets and streaming data.
• Mentor other developers and give effective code reviews; uphold frontend standards and patterns.
• Communicate clearly with non-engineering stakeholders.

Responsabilidades

• Own the front-end architecture and technical stack for the trading platform.
• Design and implement complex, real-time interfaces.
• Act as a 'player-coach' mentoring front-end developers.
• Establish and enforce frontend standards for component structure, state management, testing, and code review.
• Optimize real-time performance so high-frequency WebSocket data does not cause UI lag or instability.
• Work closely with backend, product, and BA/PM to translate business requirements into clear technical tasks.
• Help define onboarding materials and practices for new frontend engineers and participate in hiring and technical assessments. Ensure the technology stack is well-documented and the repos are maintained to best practices.

Conocimientos

English (B2 or higher)

React

TypeScript

Performance optimization

Mentoring

WebSockets

REST APIs

Mentoring

Code Reviews

Documentation

Hiring Involvement

Herramientas

Redux

Docker

AWS ECS

Laravel

Java Spring

Descripción del empleo

Position: Lead Front-End Engineer – Futures Trading Platform and Web Portals

Schedule: Hybrid (minimum 3 days/week in office)

Type: Full-Time

Experience: 7+ years of professional experience building web applications.

About Arrowfin:

Join Arrowfin to build a cutting-edge futures trading platform for active futures traders. We are looking for a Lead Front-End Engineer to own the client-side architecture of this high-stakes, real-time application.

You will be joining a dedicated, energetic, and young team of developers in our office in El Poblado. Your role is twofold: Build a lightning-fast, resilient trading interface, and lead the team to adopt engineering best practices and to mentor them into growing their skills. You will be the technical anchor, ensuring that while we move fast, we do not break things.

Key Responsibilities

• Own the front-end architecture and technical stack for the EdgeClear X trading platform and related web UIs.
• Design and implement complex, real-time interfaces in React/TypeScript (DOM, Time & Sales, charts, order entry, dashboards).
• Act as a “player-coach”: spend most of your time coding while also mentoring other frontend developers.
• Establish and enforce frontend standards for component structure, state management, testing, and code review.
• Optimize real-time performance so high-frequency WebSocket data does not cause UI lag or instability.
• Work closely with backend, product, and BA/PM to translate business requirements into clear technical tasks.
• Help define onboarding materials and practices for new frontend engineers and participate in hiring and technical assessments. Ensure the technology stack is well-documented and the repos are maintained to best practices.

Requirements

• B2 or higher English language proficiency is required.
• 7+ years of professional experience building web applications, with at least 2+ years in a Mid/senior or lead front-end role.
• Strong expertise with React and TypeScript in production environments.
• Experience building or leading real-time, data-heavy UIs (trading, analytics dashboards, monitoring tools, etc.).
• Deep understanding of:
• Component-based architecture and composition
• State management (e.g., Redux, Zustand, or similar store solutions)
• Integration with REST APIs; familiarity with WebSockets and streaming data
• Performance optimization (virtualized lists/tables, memoization, granular subscriptions)
• Demonstrated ability to:
• Mentor other developers and give effective code reviews
• Introduce and uphold frontend standards and patterns
• Communicate clearly with non-engineering stakeholders

Nice-to-Haves

• Experience in fintech / trading / brokerage or other latency/accuracy-sensitive domains.
• Familiarity with parts of our backend/infra stack such as Java/Spring, Laravel, NestJS, Docker, and AWS ECS.
• Experience with testing frameworks such as Jest, React Testing Library, Cypress/Playwright.
• Experience helping grow a team from early stages including process, documentation, and hiring involvement.

Why Join ArrowFin?

• Impact: You are building a platform that manages millions in transactional volume. Your work directly affects the experience and profitability of our trading customers.
• Career Growth: This role is designed to evolve into a Product Owner position for a product segment within the EdgeClear ecosystem.
• Stability: We are building for the long term with a roadmap that spans years, not months.
• Our team: You are not a contractor that will be hired out to others. You will be working in a team locally that supports our products directly.
• Benefits: We provide private insurance, education reimbursement, a strong team culture and a stable career path.