Senior Frontend Engineer React and TypeScript

Nordic Investin Group Aktiebolag; Stockholms kommun; On-site; SEK 900,000 - 1,150,000; Full time

Job summary

Nordic Investin is seeking a Senior Frontend Engineer (React + TypeScript) to own frontend architecture, performance, and accessibility for a high-value web product. You will collaborate with design, product, and backend engineers, delivering across testing, accessibility, and performance improvements in rapid delivery cycles.

You will work with a partner company and contribute to decision-making about maintainability and production behavior, while shipping hands-on frontend work.

Qualifications

• Proven production experience with React and TypeScript.
• Strong knowledge of HTML and CSS.
• Experience with complex state, APIs and asynchronous user flows.
• Accessibility and frontend performance expertise.
• Confidence with automated testing and modern build tooling.
• Ability to collaborate closely with designers and product managers.

Responsibilities

• Develop responsive product experiences in React and TypeScript.
• Create scalable component and state management patterns.
• Improve Core Web Vitals, runtime performance and bundle health.
• Build accessible interactions with keyboard and assistive tech.
• Define frontend testing across unit, integration and end-to-end layers.
• Use analytics and user feedback to improve real workflows.

Skills

React

TypeScript

Browser fundamentals

HTML & CSS

State management

Accessibility

Frontend performance

Automated testing

Build tooling

Collaboration with designers/product

Tools

Next.js

Job description

One of Nordic Investin’s partner companies is looking for a Senior Frontend Engineer React and TypeScript, with Nordic Investin leading the recruitment process. You care about the milliseconds, edge cases and interaction details that separate a functional interface from a product people trust.

The partner is evolving a complex web product used for frequent, high value decisions. You will take ownership of frontend architecture, performance and accessibility while working closely with design, product and backend engineers.

The environment will suit someone who enjoys building systems, testing assumptions in code and taking responsibility for production behaviour. Technical choices are expected to be explained in terms of maintainability, reliability and the people who use the product.

How you will work

You will work in short delivery cycles with direct access to product, domain and operational colleagues. The partner expects engineers to review designs, test assumptions early and follow important changes into production. Decisions should be recorded clearly enough that another engineer can understand the tradeoff months later.

As a senior colleague, you will own substantial outcomes and help others make stronger decisions. You are expected to recognise risk early, communicate it without drama and move work forward with practical alternatives. The role still includes hands on delivery; seniority here means broader judgement, not distance from the work.

What you will do

• Develop responsive product experiences in React and TypeScript.

• Create scalable component and state management patterns.

• Improve Core Web Vitals, runtime performance and bundle health.

• Build accessible interactions that work with keyboard and assistive technology.

• Define frontend testing across unit, integration and end to end layers.

• Use analytics and user feedback to improve real workflows.

What you will bring

• Strong production experience with React and TypeScript.

• Excellent knowledge of browser behaviour, HTML and CSS.

• Experience with complex state, APIs and asynchronous user flows.

• Practical accessibility and frontend performance expertise.

• Confidence with automated testing and modern build tooling.

• Ability to collaborate closely with designers and product managers.

Experience that would add value

• Design systems used by several teams.

• Next.js or another server rendered React framework.

• Data visualisation or workflow heavy products.

A background that can succeed here

You may come from SaaS, ecommerce, media, health technology or an internal product with demanding users. A polished portfolio is welcome, but we are equally interested in the technical reasoning behind your work and the compromises you made.

What makes the opportunity interesting

This role gives you influence over both the visible experience and the engineering system behind it. The partner values frontend work as product engineering, with room to improve architecture rather than only implement screens.

The exact partner, employment model, compensation, start date and working arrangement will be explained openly during the process. Nordic Investin will make sure you understand the context, expectations and decision path before you are asked to commit significant time.

The recruitment conversation

During the process, Nordic Investin will focus on concrete decisions you have made: the context you received, the alternatives you considered, the result you observed and what you would change today. You do not need every optional technology if your core experience transfers and you can explain how you would close the gap.