Lead backend engineer (typescript) Work, Jobs (with Salaries)

Lead Backend Engineer (Typescript)
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Lead Backend Engineer (Typescript)

On AG -
London

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Job details

Qualifications

Node.js
Kubernetes
Test-driven development
Google Cloud Platform
AWS
Distributed systems
New Relic
REST
Mentoring
Ruby
APIs
IT
Kafka
GraphQL
Root cause analysis
TypeScript

Full job description

Location: London

Technology

In short

Our Direct to Consumer business is performing and growing strongly, which is why we - within the Customer Communication Platform team in Commercial Technology at On - are looking for a Lead/Senior Backend Engineer to scale On’s online business to the next level. Our newly created team is focused on providing a customer communication platform product. As an experienced engineer, you will be responsible to design, build, deploy, test and operate our digital services. You will be working in our office in London and collaborating closely with the cross-functional teams across locations.

Your Mission

You will shape and evolve the customer communication platform by providing APIs, real-time events and documentation to reduce the cognitive load and enable multiple stream-aligned teams to rapidly deliver premium, personalized experiences across all consumer touch points
You will lead the design and rollout of complex systems, guide architectural decisions across teams through RFCs, and ensure our platforms are built for long-term growth and operational excellence
You will act as an expert in the given technology area, leverage best in class engineering practices including continuous integration and deployment, code reviews, high test coverage and allowing for observability
You iteratively deliver high-value, high-quality solutions while balancing speed, scalability, and reliability
You collaborate effectively across diverse teams and stakeholders, driving alignment between product, design, and engineering
You will engage in the engineering community by sharing knowledge, mentoring your team mates, receiving / providing feedback or growing our team by supporting the hiring
You act as a mentor and technical reference for senior engineers, fostering a culture of learning and growth

Your story

You have 8+ years of backend experience designing, building, testing, releasing, maintaining, scaling, and evolving complex distributed systems with a strong problem-solving mindset striving for excellence and taking full accountability across teams
You are fluent in Ruby and Node.js (TypeScript and NestJS as a plus) ecosystems and experienced with API design (GraphQL/REST)
You bring strong experience with event-driven systems (Kafka, RabbitMQ or similar), distributed data architectures and delivering resilient, observable APIs (New Relic)
You have mastered automated testing, TDD, and performance debugging tools, you are hands-on with operating the infrastructure on AWS or GCP and container orchestration (Kubernetes)
You have led architectural initiatives, guided system design through RFCs, and influenced engineering strategy beyond your immediate team
You lead and coach teams through incident response, root cause analysis, and long-term reliability improvements
You communicate with clarity and empathy, guiding stakeholders through complex trade-offs and aligning multiple teams around shared goals
You mentor engineers and influence organizational culture, creating an environment of feedback, growth, shared accountability, and technical excellence
You think product-first — connecting technical decisions to customer and business outcomes, applying holistic thinking and delivering for impact using experimentation

Attributes of a successful candidate:

Action-Oriented: Anticipates opportunities that advance organizational goals and mobilizes others to act with urgency and clarity
Organization-focussed: Builds trusted relationships across teams, creating alignment and shared purpose
Alignment-driving: Connects technical decisions to organizational strategy and ensures consistent execution across domains
Leads through Ambiguity: Provides clarity and confidence across teams in uncertain or high-pressure situations
Develops Others and Self: Models continuous learning while fostering growth across the organization through mentoring, coaching, and structured feedback

About the Team

As you might expect from a running brand, the wider E-Commerce team at On is a fast-paced place to be. You will work in the diverse Customer platform team as part of Commercial Technology. You will collaborate with roles including Software Engineers, QA Engineers, Product Managers, Data Analytics, Marketing and others of stream-aligned or platform teams that are located in Berlin, Zurich and London.

London

Home to nearly 3000 parks, a population speaking more than 300 languages, and a vibrant art and music scene, London is one of the world’s most loved cities for good reason.

12 Fleur De Lis Street,
E1 6DB
United Kingdom

Location

What we offer

On is a place that is centered around growth and progress. We offer an environment designed to give people the tools to develop holistically – to stay active, to learn, explore and innovate. Our distinctive approach combines a supportive, team-oriented atmosphere, with access to personal self-care for both physical and mental well-being, so each person is led by purpose.

On is an Equal Opportunity Employer. We are committed to creating a work environment that is fair and inclusive, where all decisions related to recruitment, advancement, and retention are free of discrimination.

Build the better you

What to expect

We want to set everyone up for success, so here’s the lowdown on how we hire. Our process is a two-way street – bringing you into our culture, while helping us learn how you think.

Our full process can last about eight weeks from application to offer, because we care about getting it right. These steps explain how we usually do things.

Before you get started, feel free to consider if you want to work with us. Strange question? Well, we give people a lot of space to navigate their day-to-day and that style isn't for everyone. We want you to be passionate about what you do and be sure this is the right fit. Because when skills and passion combine – it creates that 'Wow' moment.

Step One

It starts with you...

You'll start by submitting your application to a specific role. We try to keep this step as simple as possible. We do get a lot of applications, but we review them all. If you're a good fit to the role, a recruiter will follow up with you directly. If you didn't receive a reply, or were unsuccessful this time around, we encourage you to look for other possible matches at On.

Step Two

Interview with a recruiter

What ignites your spirit? This is where we’ll start getting to know all about you and what makes you tick – and it’s your first chance to get a feel for our culture. Chatting with a member of our talent team, you’ll learn more about On and how we work. We’ll learn about what motivates you and what you could bring to the team.

Step Three

Interview with a hiring manager

Ready to dig into the details? This second interview will be held with your future manager and will focus on the specifics of the job. Together you’ll delve into your unique skills and experiences and how they could be relevant at On. It's also a time to assess how you might feel working side-by-side. Bring any questions you have about the job, the team or anything else you might like to know – this is an open forum.

Step Four

The Case Study

What's your style? This task will help us understand how you think, face a challenge and give insight into your novel ideas. Designed to give everyone their best shot, your case study is based on something you might typically experience on the job. This is your chance to show us what you’ve got. So express yourself. Be you.

Step Five

The Experience Day

Your first taste of the Oniverse. This is a time to meet some of the people you'll be working closest with. In person or virtually, you'll get a feel for the day-to-day at On and the people who make it happen. You'll chat with a few potential teammates - the conversations will be as equally driven by the role and your experience as by our values. We believe how you do things is just as important as what you do.

Step Six

The Result

Are we a good fit? We’ll get together internally to share our feedback and decide if we’re a match. We know that job searching is a big time investment, so it’s not a decision we take lightly. It’s also time for you to reflect on the experience – are we the right place for you? No matter the outcome, we’ll give you meaningful feedback.

Apply Now

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Technology

In short

Your Mission

Your story

About the Team

London

What we offer

What to expect

Step One

It starts with you...

Step Two

Interview with a recruiter

Step Three

Interview with a hiring manager

Step Four

The Case Study

Step Five

The Experience Day

Step Six

The Result