Experimentation Engineer (Front‑End) Job at BEEFEATER (London)

Senior Full Stack Engineer, Data Platform - Experimentation

We are looking for an experienced Senior Full Stack Software Engineer to join ou...

Location

Germany , Berlin

Salary:

Not provided

Bolt

Expiration Date

Until further notice

Requirements

A full-stack engineer with 5+ years of tech experience, including 2+ years in frontend/full-stack roles
Strong Front-end skills: JavaScript/TypeScript, CSS, and HTML
Solid Back-end understanding: experience building APIs and using relational databases (SQL)
Excellent communication and above-average soft skills for collaborating with cross-functional teams and talking to users
A strong UX mindset to ensure simple, self-explanatory design and intuitive interfaces
Proactive problem-solving with a product mindset, focused on value and driving impact

Job Responsibility

Take full ownership of the UI/UX of the AB Platform, including redesign of the existing tools and adding AI capabilities
Contribute directly to improving key features, focusing on performance and user experience
Collaborate with the team to build and optimise the Experimentation Platform used by hundreds of internal users
Work closely with product teams and users to ensure the platform is intuitive and easy to use for non-technical users, including conducting user interviews
Help maintain and evolve high-traffic (200k RPS) back-end services

What we offer

Get a rewarding salary and stock option package that lets you focus on doing your best work

Senior Design Engineer, Design Systems

We’re looking for a Senior Design Engineer who thrives at the intersection of de...

Location

Canada , Kitchener

Salary:

Not provided

Dialpad

Expiration Date

Until further notice

Requirements

An online portfolio demonstrating design-focused technical expertise across multiple projects, showcasing thoughtful, high-quality work that drives innovation
8+ years of experience demonstrating exceptional design engineering fluency across modern product environments, including 3+ years of design system experience
Deep proficiency and design-focused passion in the front-end stack like Vue/React/Angular/etc, HTML, CSS, Design Tokens, and JavaScript/Typescript
Track record of designing, documenting, and evolving styles, Design Tokens, component libraries, and UI patterns that scale product development
Proven ability to design and build tooling, plugins, or internal utilities that streamline workflows between design and engineering teams
Experience building AI/ML-driven features, prototypes, experimental systems, or research tools, ideally leveraging frameworks like Model Context Protocol (MCP) or similar
Demonstrated skill in optimizing and refactoring existing UIs for performance, accessibility, and maintainability
Mastery of state management and component-based architecture
A systemic approach, thinking in patterns and frameworks
Strong understanding of foundational UX principles, design heuristics, information architecture, usability, accessibility and inclusive design practices

Job Responsibility

Oversee the front-end design strategy of our Design System – style, components, and patterns by bringing your experience as a subject matter expert in front-end design and engineering
Lead and heavily influence how Dialtone and the design system team mature to take on large, high-visibility initiatives, as well as how other designers and engineers contribute
Advance and scale a design-focused prototyping practice that explores feasibility, evaluates emerging AI capabilities, and AI design patterns
Rapidly build functional prototypes that inform product direction
Design and build tooling that supports product designers, researchers, and engineers—such as internal utilities, plugins, and scripts that accelerate iteration and experimentation
Prototype and validate new interaction models for AI-powered workflows, leveraging technologies like Model Context Protocol (MCP) and modern front-end frameworks, or even integrate LLM APIs and generative AI services into design tools
Ensure quality and performance in everything you build with rigor, optimizing for accessibility, maintainability, and performance as first-class concerns in the design process
Act as a guardian of consistency, championing reusable components, ensuring designers and developers adhere to a unified system, and evolving Dialtone, our design system
Navigate ambiguity with confidence, helping cross-functional teams clarify ideas and move toward impactful solutions quickly and iteratively
Invest in the growth of the Design organization by sharing best practices, mentoring peers in design-engineering methods, and building community around creative prototyping

What we offer

Dialpad offers competitive benefits and perks, alongside a robust training program that helps you reach your full potential
We have designed our offices to be inclusive, offering a vibrant environment to cultivate collaboration and connection
Our exceptional culture, recognized repeatedly as a certified Great Place to Work, ensures every employee feels valued and empowered to contribute to our collective success

Senior Design Technologist

At Capgemini Invent, we believe difference drives change. As inventive transform...

Location

United States , San Francisco

Salary:

100000.00 - 150000.00 USD / Year

frog

Expiration Date

Until further notice

Requirements

Professional experience designing and developing user interfaces, UX concepts, web sites and applications on a variety of platforms, frameworks, and methodologies
Ability to collaborate with a multi-disciplinary team of designers and strategists
A background in data management and manipulation to support data specific needs and concepts
Ability to communicate with clients directly and complete program and workstream tasks autonomously in some cases
Exceptional written and verbal communications skills along with experience in preparing and delivering documentation, proposals, presentations, and structured working sessions to all levels in a client organization
Bachelor’s Degree in the sciences, engineering, or creative discipline or equivalent experience
Proficiency in: Modern web front-end application development
Working within Cloud platforms (e.g., AWS, GCP, Azure, etc.)
Source control (e.g., GitHub, GitLab) and toolchain integrations
Third-party API integrations

Job Responsibility

Design Technologists at frog blend futurist vision and practical thinking, serving as hands-on organizers of technical insights, experiments, proofs, and models
Bridge the gap between creative design services, technology strategy, and software engineering
Drive technology platform research, experimentation, concept exploration, prototyping, and ideation within the creative process of designing user experiences
Leverage and manage data to support technical needs ranging from AI applications to impact assessments
Gather, ingest, and utilize data from diverse modalities to advance project goals
Identify and analyze current and emerging UX technology patterns and trends
Conduct in-depth investigations and experiments with new platforms and frameworks
Spot new opportunities for business value and UX innovation through technology enablers
Work closely with the creative team to translate design assets into user experience simulations, interactive prototypes, technical proofs-of-concept, and UI/presentation layers
Embrace a maker and tinkerer mindset—technically adept, passionate about design, and eager to tackle challenges hands-on

What we offer

Flexible work
Healthcare including dental, vision, mental health, and well-being programs
Financial well-being programs such as 401(k) and Employee Share Ownership Plan
Paid time off and paid holidays
Paid parental leave
Family building benefits like adoption assistance, surrogacy, and cryopreservation
Social well-being benefits like subsidized back-up child/elder care and tutoring
Mentoring, coaching and learning programs
Employee Resource Groups
Disaster Relief

Fulltime

Design Engineer, Design Systems

We’re looking for a Design Engineer who thrives at the intersection of design, f...

Location

United Kingdom , London

Salary:

Not provided

Dialpad

Expiration Date

Until further notice

Requirements

An online portfolio demonstrating design-focused technical expertise across multiple projects
3-5 years of experience demonstrating exceptional design engineering fluency across modern product environments, including 1-2+ years contributing to design systems
Proficiency and design-focused passion in the front-end stack like Vue/React/Angular/etc, HTML, CSS, Design Tokens, and JavaScript/Typescript
Track record of designing, documenting, and evolving styles, Design Tokens, component libraries, UI patterns that scale product development
Interest or experience in the design and build of tooling, plugins, or internal utilities that streamline workflows between design and engineering teams
Experience building AI/ML-driven features, prototypes, experimental systems, or research tools, ideally leveraging frameworks like Model Context Protocol (MCP) or similar
Demonstrated skill in optimizing and refactoring existing UIs for performance, accessibility, and maintainability
Proficiency in state management and component-based architecture
A systemic approach, thinking in patterns and frameworks
Strong understanding of foundational UX principles, design heuristics, information architecture, usability, accessibility, and inclusive design practices

Job Responsibility

Play a key role in the front-end design strategy of our Design System – style, components, and patterns
Advocate for Design, being the bridge between design and engineering
Assist the design system team in maturing to take on large, high-visibility initiatives
Contribute and execute upon a growing design-focused prototyping practice that explores feasibility, evaluates emerging AI capabilities, and AI design patterns
Rapidly build functional prototypes that inform product direction
Design and build tooling that supports product designers, researchers, and engineers—such as internal utilities, plugins, and scripts that accelerate iteration and experimentation
Prototype and validate new interaction models for AI-powered workflows, experience integrating AI into prototypes, and experimenting with AI-driven UI patterns
Ensure quality and performance in everything you build with rigor, optimizing for accessibility, maintainability, and performance as first-class concerns in the design process
Act as a guardian of consistency, championing reusable components, ensuring designers and developers adhere to a unified system, and evolving Dialtone, our design system
Navigate defined problems with autonomy, helping cross-functional teams clarify ideas and move toward impactful solutions quickly and iteratively

What we offer

Competitive benefits and perks
Robust training program that helps you reach your full potential
Offices designed to be inclusive, offering a vibrant environment to cultivate collaboration and connection
Exceptional culture, recognized repeatedly as a certified Great Place to Work

Principal Software Engineer - Front End Architect

The Fabric Platform Shell team is dedicated to creating the best SaaS data devel...

Location

Canada , Vancouver

Salary:

142400.00 - 257500.00 CAD / Year

Microsoft Corporation

Expiration Date

Until further notice

Requirements

Bachelor's Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience
Experience creating or extending architectural design for complex front end systems
Ability to meet Microsoft, customer and/or government security screening requirements are required for this role. These requirements include, but are not limited to the following specialized security screenings: Microsoft Cloud Background Check: This position will be required to pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter
3+ years demonstrated expertise in developing complex web application and front-end architectures on technology including JavaScript, TypeScript, HTML, CSS, and at least one popular web frontend framework such as React, Vue, or Angular
Bachelor's Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Master's Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python + OR equivalent experience
A passion for delivering modern, high-performance user experiences in browser environments
Experience in building great developer and user experiences for modern analytics systems
A deep curiosity and willingness to question the status quo
High enthusiasm, integrity, ingenuity, results-orientation, and self-motivation in a fast-paced environment
A love for tackling the next problem, the next experiment, and the next partnership

Job Responsibility

Architecting and designing highly scalable experiences for the Fabric Platform in browser environments
Working with engineering managers and developers on full stack and backend development to deliver comprehensive experiences based on the architecture
Collaborating closely with UX & UI designers, product managers, program managers, and other engineers throughout the product feature development lifecycle
Demonstrating technical leadership by identifying gaps and writing high-quality code
Embody our culture and values
Coding: Review and write code to meet team standards, ensure adequate test coverage, and maintain code quality. Use automated tools, debug proactively, and lead by example in producing secure, maintainable, and performant code. Apply and promote coding patterns and best practices across the team
Design: Create and drive effective test strategies, ensure security testing, and improve the test suite. Build testable code, identify dependencies, collaborate across teams, and own architectural decisions to meet performance, security, and compliance requirements
Engineering Excellence: Apply secure design principles, scale products to customer requirements, automate production and deployment, and ensure compliance with regulations. Stay current with technology trends, advocate best practices, and support development tools
Implement: Drive project planning and estimation, ensure security and compliance in plans, automate deployments, and use experimentation to measure impact. Monitor dependencies and enact rollback plans when needed
Reliability and Supportability: Integrate logging and telemetry for monitoring, act as a designated responsible individual (DRI), resolve incidents, maintain live site operations, and improve troubleshooting guides and support documentation

Fulltime

New

Senior Product Analyst - Courier App Experience

Are you a strategic thinker with a passion for optimizing the 'last mile' of log...

Location

Salary:

Not provided

Just Eat Takeaway.com

Expiration Date

Until further notice

Requirements

Strong experience in Product Analytics, with a heavy focus on mobile app environments (logistics or gig-economy experience is a massive plus)
Expertise in Snowplow, Google Analytics, or similar event-level tracking tools
Advanced SQL skills and data visualization mastery in Tableau
Experience with Airflow for orchestration and GitHub for collaborative development
Proficiency in Python or R for statistical analysis and causal inference
Modern AI Skills: Familiarity with or curiosity about Agentic workflows and leveraging AI to scale analytical impact
Experimentation Rigor: Proven track record in running experiments A/B testing and other methodologies including network effect interference and how to mitigate it through advanced testing designs
Regulatory Knowledge: A strong grasp of GDPR principles and how they apply to user tracking and data retention

Job Responsibility

Measurement Architecture: Design and implement comprehensive measurement plans for our front-end courier experience using tools like Snowplow or Google Analytics 4
Tracking Implementation: Partner with engineers to define event schemas and ensure front-end tracking is robust, scalable, and accurately reflects the courier's real-world journey
Holistic Deep Dives: Go beyond the front-end. You will perform deep-dive analyses by merging app-tracking data with backend operational data sources (e.g., dispatch logs, routing efficiency, payment systems) to identify friction points
Analytics Engineering & Orchestration: Leverage Airflow to orchestrate data pipelines and maintain version-controlled workflows via GitHub, ensuring data reliability and reproducible research
Experimentation Leadership: Own the end-to-end experimentation such as A/B testing, etc., You'll design experiments, calculate sample sizes, and perform causal inference to determine what truly moves the needle
Agentic Workflow Automation: Explore and implement Agentic AI workflows to automate routine analysis, anomaly detection, or courier feedback categorization, keeping the team focused on high-impact strategy
Visual Storytelling: Build and maintain sophisticated, executive-level dashboards in Tableau that track the health of the courier experience and logistics performance
Champion the Courier Voice: Act as the analytical advocate for our couriers. You will use data to highlight pain points in their daily workflow, ensuring the 'Courier Voice' is a primary driver of the product roadmap
Data Governance & Privacy: Ensure all tracking and data collection methods are strictly compliant with GDPR and local privacy regulations

What we offer

Our teams forge connections internally and work with some of the best-known brands on the planet, giving us truly international impact in a dynamic environment
Fun, fast-paced and supportive, the JET culture is about movement, growth and about celebrating every aspect of our JETers
Inclusion, Diversity & Belonging - committed to creating an inclusive culture, encouraging diversity of people and thinking, in which all employees feel they truly belong and can bring their most colourful selves to work every day

Fulltime

Senior Full Stack Engineer

Our team is looking for a Senior Full Stack Engineer to lead key initiatives tha...

Location

United States , Boston, MA

Salary:

148000.00 - 222000.00 USD / Year

myGwork - LGBTQ+ Business Community

Expiration Date

Until further notice

Requirements

A proven track record of building high-quality products and systems, with pride in writing clean, high-quality code
7+ years of experience in a software engineering role
Strong experience developing end-to-end software solutions or extensive experience with both front-end and back-end technologies
Experience leading projects and being accountable for their outcomes
Experience mentoring team members or driving initiatives that help the team learn new skills
Experience conducting code reviews and running a robust testing cycle
Experience working in agile, fast-paced environments
You’ve already experimented with AI in work or personal projects, and you’re excited to dive in and learn fast. You’re hungry to responsibly explore new AI tools and workflows, finding ways to make your work smarter and more efficient
Transform workflows by putting AI at the center, building smarter systems and ways of working from the ground up

Job Responsibility

Lead key initiatives that will enhance our product offerings and support our company’s growth
Play a crucial part in shaping outcomes by developing innovative end-to-end solutions using both front-end and back-end technologies
Optimize existing products and create new solutions that redefine what’s possible for our customers
Tackle complex challenges, develop multiple solutions, and evaluate business and technical trade-offs to determine the best path forward
Act as a leader and mentor, and drive key technology decisions
Be responsible for deploying well-designed, thoroughly tested solutions that ensure reliability and performance
Deliver exceptional work that sets the standard for velocity and results company-wide, while helping shape Klaviyo’s future through experimentation, creativity, and executional excellence

What we offer

Annual cash bonus plan
Variable compensation (OTE) for sales and customer success roles
Equity
Sign-on payments
A comprehensive range of health, welfare, and wellbeing benefits

Director, Product Experience Design - Mastercard Developers

You will lead the Product Experience Design function for Mastercard Developers –...

Location

United States of America , O Fallon

Salary:

156000.00 - 265000.00 USD / Year

Mastercard

Expiration Date

Until further notice

Requirements

Experience in digital product design, designing technical platforms (API portals, cloud tools, developer consoles, SDK experiences) for developer consumption
Proven experience leading and mentoring a team of Product Experience Design Managers and Senior Designers, driving strategic outcomes, fostering collaboration, and building design capabilities through continuous up skilling
Experience building and scaling design systems with front end engineering
Data driven with an ability to transform research, analytics, and experimentation into design decisions
Ability to use product analytics for funnel analysis and insight synthesis
Depth in interaction design, information architecture, visual hierarchy, content clarity
Understanding of API lifecycle (authentication, versioning, rate limits, keys, webhooks, etc)
Functional knowledge of front end technologies (HTML, CSS, basic JavaScript) for engineering collaboration
Clear written communication for strategy documents, design briefs, executive updates

Job Responsibility

Define a north star experience for the developer platform journey: discover, evaluate, integrate, onboard, optimize
Prepare the platform for agent mediated usage
Own and evolve the design system (tokens, accessibility standards, interaction patterns) with Engineering
Use qualitative insight and product analytics (conversion, drop off, success rates) to guide prioritization
Coach and grow a design team
Partner with Product Management to align roadmaps to outcome metrics
Embed accessibility and inclusive design (Web Content Accessibility Guidelines (WCAG) alignment) into tools, patterns, and reviews
Drive consistency across marketing surfaces, documentation, console user interface, and post integration touch points

What we offer

insurance (including medical, prescription drug, dental, vision, disability, life insurance)
flexible spending account and health savings account
paid leaves (including 16 weeks of new parent leave and up to 20 days of bereavement leave)
80 hours of Paid Sick and Safe Time, 25 days of vacation time and 5 personal days, pro-rated based on date of hire
10 annual paid U.S. observed holidays
401k with a best-in-class company match
deferred compensation for eligible roles
fitness reimbursement or on-site fitness facilities
eligibility for tuition reimbursement

Fulltime

Experimentation Engineer (Front‑End)

BEEFEATER

Location:
United Kingdom , London

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:
May 03, 2026

Expiration:
May 08, 2026

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