Senior Frontend Engineer – Product & Tech to Lendo

Ada Digital; Stockholms kommun; On-site; SEK 750,000 - 950,000; Full time

Job summary

Lendo in Stockholm is seeking a Senior Frontend Engineer to shape our web and mobile experiences with React and TypeScript. You will own parts of the customer-facing experience from idea to release, collaborating closely with Product and Design.

You will work in a Go-based backend environment, integrate via REST APIs, and contribute to frontend architecture and engineering best practices while mentoring teammates and driving improvements.

Qualifications

• Several years of professional experience building production-grade frontend applications.
• Strong hands-on experience with React and TypeScript.
• Experience building scalable frontend solutions and integrating them with backend services.
• Experience with modern development workflows and CI/CD.
• Experience with testing and quality-focused development.
• A good understanding of frontend architecture and technical best practices.
• A pragmatic approach to balancing technical quality, complexity, time and business value.
• Strong ownership and the ability to communicate risks, technical debt and challenges openly.

Responsibilities

• Build and evolve web and mobile experiences using modern frontend technologies.
• Take end-to-end ownership from idea and development to release and maintenance.
• Build scalable and reusable solutions using React and TypeScript.
• Contribute to frontend architecture, technical standards and engineering best practices.
• Work closely with Product and Design to balance user needs, technical quality and business value.
• Integrate frontend solutions with backend services through REST APIs and third-party integrations.
• Ensure quality through testing, code reviews, observability and continuous improvement.
• Contribute to technical discussions and architectural decisions within your team and across Lendo.
• Mentor colleagues and share knowledge across the engineering organization.
• Help identify technical debt and turn frontend improvements into clear priorities and business value.

Skills

React

TypeScript

Frontend architecture

CI/CD workflows

Testing

Ownership

Mentoring

Tools

GitHub Actions

Docker

Kubernetes

Playwright

Sentry

Git

Job description

Build the digital experiences that help people make smarter financial decisions.

Do you want to build products that have a real impact on people’s financial lives? As a Senior Frontend Engineer at Lendo, you’ll help shape our web and mobile experiences through hands‑on development, technical ownership and real influence. You’ll join a cross‑functional product team and own solutions from idea to development, release and continuous improvement. Beyond coding, you’ll contribute to technical decisions, product development and how we evolve as an engineering organization.

The Opportunity

• You get to build both web and mobile experiences in a modern fintech environment.
• You will work with a modern stack including React, TypeScript, GCP and Go.
• You get real ownership and a voice in shaping technical decisions, architecture and ways of working.
• Lendo is entering an exciting phase with new products and opportunities to shape the customer experience.
• You will join a collaborative Product & Tech organization where your ideas and technical expertise can make a real difference.

Your Challenge

As a Senior Frontend Engineer, you will take ownership of key parts of Lendo’s digital customer experience. You will work closely with Product, Design and other engineers to build intuitive, scalable solutions that simplify financial decisions.

You will

• Build and evolve web and mobile experiences using modern frontend technologies.
• Take end-to-end ownership from idea and development to release and maintenance.
• Build scalable and reusable solutions using React and TypeScript.
• Contribute to frontend architecture, technical standards and engineering best practices.
• Work closely with Product and Design to balance user needs, technical quality and business value.
• Integrate frontend solutions with backend services through REST APIs and third-party integrations.
• Ensure quality through testing, code reviews, observability and continuous improvement.
• Contribute to technical discussions and architectural decisions within your team and across Lendo.
• Mentor colleagues and share knowledge across the engineering organization.
• Help identify technical debt and turn frontend improvements into clear priorities and business value.

The Team and Workplace

Our frontend environment is centered around React and TypeScript, with a mixed TypeScript/JavaScript codebase. Our frontend services integrate with Go-based backend services through REST APIs in a cloud-native environment using Kubernetes on GCP.

For mobile development, we are looking for experience with iOS/Android app development, for example through React Native or native development.

We continuously evolve our architecture with a focus on performance, maintainability and developer experience, where your technical ideas can make a difference.

About You

We are looking for a senior frontend engineer who combines strong technical skills with a pragmatic mindset, curiosity and a genuine sense of ownership.

You have

• Several years of professional experience building and maintaining production‑grade frontend applications.
• Strong hands-on experience with React and TypeScript.
• Experience building scalable frontend solutions and integrating them with backend services.
• Experience with modern development workflows and CI/CD.
• Experience with testing and quality‑focused development.
• A good understanding of frontend architecture and technical best practices.
• A pragmatic approach to balancing technical quality, complexity, time and business value.
• Strong ownership and the ability to communicate risks, technical debt and challenges openly.
• The ability to contribute to technical direction and architectural discussions.
• An interest in sharing knowledge and mentoring other developers.

Experience with the following is a plus

• Mobile app development – iOS/Android, React Native or native development.
• Next.js
• Frontend performance optimization
• Design systems
• A/B testing
• Tools such as Sentry and Playwright
• GitHub Actions, Docker, Kubernetes, Git and Yarn

As a person, you are proactive, collaborative and comfortable taking initiative. You enjoy solving problems, exploring new ideas and driving improvements together with your team.