Senior Frontend Engineer – Product & Tech to Lendo
TNG Group AB · Stockholm · Tills vidare · Deadline 2026-11-20
TNG Group is recruiting a **Senior Frontend Engineer** for Lendo’s Product & Tech organization. Working within a cross-functional product team alongside product managers and designers, the engineer holds **end-to-end technical ownership** of digital customer experiences across web and mobile platforms. Key duties include building reusable and scalable applications using React and TypeScript, integrating frontend services with Go-based backends via REST APIs, contributing to frontend architecture, and maintaining engineering standards through code reviews, testing, and continuous deployment within a cloud-native Google Cloud Platform and Kubernetes environment. The position also involves addressing technical debt and mentoring colleagues. Applicants must have several years of professional experience developing production-grade frontend applications, demonstrated hands-on expertise with **React and TypeScript**, and experience integrating frontend solutions with backend services. Familiarity with modern CI/CD workflows, automated testing, and frontend architectural best practices is required. Beneficial experience includes mobile application development with iOS, Android, or React Native, as well as familiarity with Next.js, design systems, performance optimization, A/B testing, Playwright, Sentry, Docker, and GitHub Actions.
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.
Let´s Connect!
We have chosen to work with Ada Digital in this hiring process. Their recruitment process focuses on transparency, inclusion and a fast moving candidate experience. And now we want to know more about you – on your own terms! To apply, please fill out the short form, briefly motivate why you are interested in the position, and attach your CV or LinkedIn-profile. No additional documentation is needed. You can then, in real-time, follow your application online as our recruiters are working with it. We work with a continues selection process which means we might hire a candidate before the final apply date, so apply already today! Interested and want to know more? Please contact our recruiter today. We are looking forward to connecting soon!