Senior Tech Lead - UK (German-speaking)

HORIZONTAL DIGITAL UK LIMITED; Greater London; Remote; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Flexibility + remote working

22 days holiday

2 floating holiday days

2 volunteering days

Defined contribution pension scheme

Job summary

Horizontal Digital UK Limited is seeking a German-speaking Senior Tech Lead with deep expertise in Sitecore and AI-enabled delivery to architect and lead enterprise-scale digital experience platforms. You will mentor engineers, bridge client requirements and solution design, and ensure scalable, high-performance outcomes.

In this role you will collaborate with cross-functional teams and stakeholders to deliver robust Sitecore solutions, while driving innovation and best practices in AI-assisted

Qualifications

• Extensive Sitecore development and delivery experience.
• Strong background in AI-enabled delivery and modern development practices.
• Proven leadership of cross-functional engineering teams.

Responsibilities

• Lead end-to-end Sitecore-based architectures and delivery.
• Define standards, patterns and oversee third-party integrations.
• Mentor engineers and drive delivery quality and documentation.
• Collaborate with UX, data and QA to align technical decisions with business goals.

Skills

Sitecore

C#.NET

JavaScript/TypeScript

React/Next.js

REST/GraphQL APIs

CI/CD

Agile/Scrum

AI integration

Tools

Azure DevOps

GitHub Actions

Job description

Senior Technical Lead – UK

At Horizontal Digital, we hold ourselves to one key belief:You’reonly as good as your worst customer experience. This mantra is what drives our digital consultancy to think beyond the easy answers and instead create websites, apps,portalsand other experiences that solve customer needs for Fortune 500companiesin intuitive and empathetic ways. And we make this lofty standard a reality by fusing strategy, data,designand technology together to arrive at solutions that set the bar higher for everyone.

We use these values to fuel superior results:

Lockarms

We forge relationships that make our impact 1,000x stronger. This means working across departments and engaging both our clients and our communities to deliver the greatestgood.

Showhustle

We’re not ones to sit on our hands and wait. Instead, weanticipateopportunities, collectively roll up oursleevesand find ways to execute the exceptional.

Embrace change

Fromnew technologiesto workplace philosophies, we welcome the unexpected and constantlyanticipatewhat’snext.

Elevate empathy

We listen before wetake action. This means understanding a variety of perspectives and holding ourselves to a higher standard of accountability.

Never settle

We motivate each other to push past the easy answers and collectively arrive at bigger, more inspiring ideas.

But enough about us.Let’stalk about you.

We are looking for an experienced German speaking Senior Tech Lead with deepexpertisein Sitecore and a forward-thinking approach to AI-enabled delivery. In this role, you willarchitectand lead thetechnical delivery of enterprise-scale digital experience platforms,embedAI tooling across thedevelopmentlifecycle, and mentor a team of engineers to do their best work. You will serve asthe bridge between client requirements, solution design, and hands-on engineering — ensuringwedeliver outcomes that are scalable, performant, and commercially sound.

Whatyou’lldo:

Technical Leadership & Architecture

• Lead end-to-end technical architecture and delivery of Sitecore-based digital experienceplatforms (XM Cloud,SitecoreAI, XP, XM)
• Define and own technical standards, code quality practices, and architectural patternsacross project teams
• Conduct solution design workshops and translate business requirements into scalable,maintainable technical blueprints
• Oversee integrations with third-party platforms including CRMs, CDPs, DAMs, searchengines, and marketing automation tools
• Perform and guide technical code reviews, ensuring adherence to best practices andSitecore conventions
• Provide high-level and detailed technical solution estimates.
• Review and consult with HZTL stakeholders on SOWs.
• Review Briefs and add questions, technicalrequirements .
• Refine technical requirements.
• Responsible for delivery of all technical documentation that isrequiredduring discovery.

Project Delivery & Estimation

• Contribute to pre-sales and estimation activities, providing technicallyaccurateandcommercially grounded effort estimates
• Identifyand flag technical risks early — including gaps in client-provided inputs thatmayimpactdelivery timelines
• Partner with Project Managers and Solution Architects to ensure estimatesremainalignedthrough proposal, SOW, and discovery phases
• Drive re-estimation processes when scope or assumptions materially change, with clearstakeholder communication

Team & Stakeholder Management

• Lead, mentor, and grow a team of Sitecore developers, fostering a culture of technicalexcellence and continuous learning
• Collaborate with cross-functional teams — UX, strategy, data, and QA — to ensure
• Technicaldecisions support broader project goals
• Act as the primary technical point of contact for clients, presenting solutions clearly andbuilding trust throughexpertise
• Facilitate knowledge transfer and ensure delivery decisions are well-documented andaccessible to the wider team
• Road-mapand Project Planning
• Accountable for technical solution planning:
• Lead and define technology approach andtool-set
• Facilitate environment setup and configuration efforts in coordination with otherdisciplines
• Brain stormingand presentation of ideas andpossible solutions- Innovations
• Sitecore AI roadmap
• Facilitate communication with Delivery Lead and Program Manager
• Responsible for delivery of all technical documentation that isrequiredduring planning
• Identifyingrisks and/or important milestones
• Involvementwith Delivery Lead, DevDirectorand Client Partner on Strategic Account &Delivery Direction

Who you areand what you bring:

Sitecore Expertise

• 10+ years of hands-on Sitecore development experience across Sitecore AI, XM Cloud,XP, and/or XM
• 3-5 years of experience leading design and implementation of digital technologysolutions using Agile/Scrum methodologies.
• Strongproficiencyin Sitecore development patterns: JSS, headless/SXA,serialization(Unicorn / SCS), and multisite configurations
• Experience with Sitecore CDP, Personalize, Search, Content Hub, Send, or other Sitecorecomposable DXP products
• Solid understanding of Sitecore licensing, deployment architecture, and cloud hosting(Azure / AWS)
• Familiarity withVercel, Netlify, Next.js, and React in the context of Sitecore headlessdelivery

AI & Modern Development

• Demonstrated experience integrating AI coding assistants (GitHub Copilot, Cursor, orsimilar) into a professional development workflow
• Understanding of LLM capabilities and limitations as applied to code generation,documentation, and test coverage
• Ability to designstructured,AI-readable inputs (design tokens, content schemas,componentspecs) that enable automation
• Experience with prompt engineering or building lightweight AI agents or automationpipelines is a strong plus

Core Technical Skills

• .NET / C# — solid backend development fundamentals
• JavaScript / TypeScript, React or Next.js for headless front-end delivery
• RESTful andGraphQLAPI design and integration
• CI/CD pipeline setup and management (Azure DevOps, GitHub Actions)
• Performanceoptimisation, accessibility standards (WCAG 2.1), and SEO best practices
• Agile / Scrum delivery experience in cross-functional teams

Add-ons

• You are Sitecore MVP and active participation in Sitecore community
• You enjoy being in front of the client andhaveprofessional services experience
• You are skilled at refining and implementing Sitecore solutions
• Experience contributing to or reviewing AI-influenced project estimates and deliverymodels

Our UK Benefits include:

• 22 days holiday
• 2 floating holiday days
• 2 volunteering days
• Defined contribution pension scheme
• Flexibility + remote working

Application Tips

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Ifyou'reunsure how to make your CV ATS-friendly, this guide provides helpful practical tips: https://www.myperfectresume.com/career-center/resumes/how-to/ats-friendly

The above description is not designed to cover orcontain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities, and activities may change at any time with or without notice.