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Lead Backend Engineer (Typescript)
Location: Berlin
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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 focussed 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 Berlin 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
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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 Berlin-based 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.
About the Team video
Gioia
Head of Operations Project Portfolio Management
My journey has evolved for sure and, actually, change can lead to infinite possibilities. Those core values that were there when I joined are still here today and I really find them extraordinary every day.
Vivek
Director of Engineering
We’re closely connected to the whole business. Every day, we’re making quick decisions to improve the customer experience. Because these live changes impact the whole business, we deeply respect individual opinion and what others think about the end customer experience.
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.
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.