Senior Front-End Engineer

Performativ Aps; Københavns Kommune; Hybrid; DKK 800,000 - 1,100,000; Full time

Job summary

Performativ is seeking a Senior Front-End Engineer to co-own the front-end experience for its trading and analytics platform. You will take ownership of architecture, implementation, and production outcomes, collaborating with backend, product, and design to turn complex financial workflows into usable interfaces for wealth managers and institutions.

The role focuses on scaling a Next.js/React architecture, multi-tenant theming, performance, and a strong component library.

Qualifications

• Production-grade React/TypeScript applications.
• Experience with modern React architecture (RSC, App Router).
• Experience with AI coding agents is a plus.

Responsibilities

• Own front-end quality, performance and architecture of trading and analytics interfaces.
• Collaborate with backend, product and design to ship financial workflows.
• Define server/client boundaries, hydration strategies and state patterns.
• Scale shared component library and multi-tenant theming.
• Improve performance, bundle size and runtime behavior.
• Ship features quickly while upholding architectural integrity.
• Lead front-end testing and CI/CD integration.
• Co-own end-to-end production deployment decisions.

Skills

React & TS

Front-end architecture

Performance optimization

Self-sufficient

Tools

Next.js 15

React Server Components

TanStack Query

Vitest/Jest

Testing Library

Playwright

CI/CD

OpenAPI types

Job description

As a Senior Front-End Engineer, you will co-own the front-end experience for Performativ's trading and analytics platform, building high-performance interfaces used by wealth managers and financial institutions. This is a hands-on engineering role with direct ownership of architecture, implementation, and production outcomes.

About The Team

The engineering team owns the platform that powers portfolio management, trading, analytics, reporting, compliance, and client engagement at Performativ. Front-end engineers work closely with backend engineers, product, and design to turn complex financial workflows into software that advisors can use every day.

The team ships continuously and gives engineers ownership over implementation decisions. On the front end, the current focus is scaling a Next.js and React architecture across increasingly sophisticated workflows while keeping performance, server and client boundaries, theming, and shared components under control.

About The Role

We are looking for a Senior Front-End Engineer to co-own the quality, performance, and architecture of our trading and analytics interfaces. This role is responsible for building production UIs, shaping front-end architecture, and raising the standard of our shared component infrastructure.

You will work closely with backend engineering, product, and design to ship financial workflows from requirements through production. You will co-own the end-to-end front-end scope, including server and client boundaries, hydration strategy, state management, performance, multi-tenant theming, testing, and the component library used across the platform.

This role requires deep React and TypeScript expertise, strong architectural judgement, and the ability to turn complex financial workflows into fast, usable interfaces. You need to be comfortable making implementation decisions independently and shipping production software without management overhead.

This role is based in Copenhagen. We work together from our city-center office, with working from home possible when there is a good reason. You should already be based in Copenhagen or be ready to relocate.

What you’ll do

• Build high-performance trading, analytics, and portfolio management interfaces used by wealth management professionals.
• Co-own front-end architecture across Next.js 15, React Server Components, TypeScript, and our shared application infrastructure.
• Define server and client boundaries, hydration strategies, and state patterns that keep the platform responsive as complexity grows.
• Scale our shared component library and multi-tenant theming across the platform.
• Improve runtime performance, bundle size, rendering behavior, and application responsiveness.
• Ship production features quickly while making architectural decisions that hold up as the product scales.
• Use AI coding agents where they improve engineering throughput while maintaining control over code quality and implementation decisions.
• Strengthen front-end testing and delivery across Vitest or Jest, Testing Library, Playwright, and CI/CD workflows.
• Co-own implementation decisions from product outcome through production deployment.

What we’re looking for

• Have built sophisticated production web applications with React and TypeScript and can structure front-end codebases that continue to work as product complexity grows.
• Understand modern React architecture, including React Server Components and the Next.js App Router, or can demonstrate the technical depth to become productive with them quickly.
• Have shipped production work using AI coding agents and understand where they improve engineering output and where direct engineering judgment is required.
• Have improved front-end performance through decisions around bundle size, hydration, rendering, data fetching, and runtime behavior.
• Are comfortable managing server state with TanStack Query and can make deliberate decisions about colocated state and client state libraries.
• Have built or extended component systems using tools such as Radix, shadcn/ui, or custom design systems.
• Understand usability, accessibility, and interaction design well enough to make sound UX decisions without treating design as somebody else’s problem.
• Have shipped tested production software using tools such as Vitest or Jest, Testing Library, Playwright, and automated CI/CD pipelines.

Preferred Experience

• Have worked on trading, investment management, portfolio analytics, or other data-intensive financial applications.
• Have worked with AG Grid or comparable data-grid infrastructure for complex datasets and interactions.
• Have worked in a pnpm and Turborepo monorepo with generated API types from OpenAPI specifications.
• Have designed front-end systems supporting multiple tenants, brands, or configurable themes.
• Have mentored engineers or raised engineering standards without moving away from hands-on development.

What we can offer you

• Work that reaches production fast. We ship weekly. Your work will be used by advisors and financial institutions within days, not quarters.
• Colleagues who set a high bar. Our team comes from Goldman Sachs, McKinsey, BCG, and Amazon. Standards are high. Politics are absent.
• Career compression. People here take on scope in twelve months that takes five years elsewhere. If you can carry it, we will give it to you.
• Direct access to founders, customers, and the market. You will sit in the rooms where decisions get made.
• Backing from leading venture funds, and a mandate to become the European standard rather than a regional alternative.

About Performativ

Wealth management runs on software built for a different era. Batch files. Overnight reconciliation. Client reports assembled by hand. Advisors spend more time fighting their systems than advising clients. The industry has accepted this for thirty years.

We are replacing that layer. Performativ is one platform for portfolio management, reporting, compliance, and client engagement, built from the ground up for how wealth is actually managed today. Banks, family offices, and independent advisors across Europe run on it.

We are a scaleup, not a startup. The product is live, the customers are real, and the growth is ahead of plan. We intend to be the system European wealth management runs on. That is not positioning. It is the plan we are executing against.

You can read more about our product at performativ.com

The bar

We are builders. We move fast, we say what we think, and we do not manage each other. Autonomy is the default, which only works if you are the kind of person who does not need to be told twice.

This is not a role for someone looking to coast inside a growing company. It is a role for someone who wants scope, wants pressure, and wants to point at something in two years and say they built it. If that is you, apply. If it is not, this will be uncomfortable, and we would rather say so now.