CrawlJobs Logo

Senior Frontend Engineer - AI Products

Poland, Warsaw Employment contract, B2B · Job Posted May 29, 2026
Apply Position
Job Link Share

Job Responsibility

  • Designing, implementing, and maintaining workflow-related UI features in hx Renew, delivering user interfaces that are both performant and reliable
  • Translating designs into production-ready React components using shadcn and tailwindcss, ensuring alignment with hx's design system
  • Acting as the primary frontend voice within your product team, collaborating with product managers, backend engineers, and designers to define requirements and solutions
  • Extending and maintaining hx's shared component library, driving consistency and scalability across multiple product teams
  • Leading by example within the frontend community, supporting less-experienced engineers through mentoring, reviews, and shared learning
  • Improving reliability through rigorous testing (unit, component, integration) and strengthening CI/CD processes for frontend delivery

Requirements

  • Delivered large-scale React applications in production, demonstrating mastery of component design, state management, and frontend architecture
  • Built and maintained design systems or component libraries that enabled consistent and accessible UIs across multiple products or teams
  • Implemented complex frontend features involving API integrations and business logic that improved usability and performance for end users
  • Strengthened engineering practices by introducing or enhancing testing frameworks and CI/CD pipelines for frontend systems
  • Led or mentored peers within a frontend engineering community, raising quality through code reviews, documentation, or technical guidance
  • Worked effectively in cross-functional product teams, demonstrating ownership, adaptability, and a focus on delivering impact for users

What we offer

  • Share Options at a highly successful Series B company
  • 25 days of non-working + 14 Polish bank holidays
  • £5,000 budget for Learning & Development
  • Mental Health Support and Therapy via Spectrum Life
  • Optional for you: access to Healthcare package provided by Luxmed + Multisport (fully funded by yourself as B2B Contractor)
  • Top-spec laptop (MacOS or Windows)
  • Share Options at a highly successful Series B company
  • £5,000 budget for learning & development
  • 26 days of holiday + 14 Polish bank holidays
  • Company pension
  • 10 days company sick pay at 100% salary, thereafter in line with labour law
  • Mental health support and therapy via Spectrum Life
  • Monthly wellbeing allowance via Juno
  • Healthcare package provided by Luxmed
  • Multisport card at Classic level
  • Top-spec work equipment (MacOS / Windows + additional monitors, mechanical keyboards etc)
  • Top-spec equipment (laptop, screens, adjustable desks, etc.)
  • Regular remote and in-person hackathons, lunch and learns, socials, and game nights
  • Team breakfasts and lunches, snacks, drinks fridge, and a fun office at The Brain Embassy
  • Exceptional opportunities for personal development and growth as we build something remarkable together

Looking for more opportunities?

Search for other job offers that match your skills and interests.

Similar Jobs for

Senior Frontend Engineer - AI Products

8 matching positions

Senior AI Product Engineer, Fullstack

Senior AI Product Engineer, Fullstack role at Arize AI, the leading AI & Agent E...
Location
Location
United States
Salary
Salary:
125000.00 - 225000.00 USD / Year
arize.com Logo
Arize
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 5+ years of frontend experience working on external user-facing UI’s - preferably in React and Typescript
  • Previous experience debugging complex systems in a team environment
  • Enthusiasm and interest in the AI and LLM ecosystem, with a desire to learn and stay updated on emerging technologies
  • Previous work building and operating highly complex, high-volume SaaS platforms/systems
  • Strong sense of product ownership in order to push features over the line
  • Passion for creating beautiful UX design with the end user in mind
  • A good teammate, someone who sees supporting their team as a core part of the job
Job Responsibility
Job Responsibility
  • Write maintainable, scalable, and performant code across the stack primarily in Typescript and React with opportunities to work in Python and Go
  • Design and build APIs, and domain / object models specific to our customers’ Machine Learning and LLM workflows
  • Design and build out performant and reusable react components that will be used throughout the application
  • Research and implement cutting-edge visualization & dimensionality reduction algorithms in a distributed environment
  • Collaborate with our product, design, and directly with customer engineering teams to enhance and expand our product offerings
  • Contribute to the build our own in-house AI Agents
  • Participate in or lead architectural decisions for new and existing features in collaboration with product, design and our backend teams
  • Contribute to design & code reviews and technical documentation
What we offer
What we offer
  • competitive equity package
  • comprehensive benefits package, including medical, dental, vision
  • a 401(k) plan
  • unlimited paid time off
  • a generous parental leave plan
  • additional support for mental health and wellness
  • WFH monthly stipend to pay for co-working spaces
  • Fulltime
Read More
Arrow Right

Senior Software Engineer, Product Engineering

Everlaw is looking for a Senior Software Engineer with experience building and s...
Location
Location
United States , Oakland
Salary
Salary:
164000.00 - 239000.00 USD / Year
everlaw.com Logo
Everlaw
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • BS or MS in Computer Science, or equivalent coursework
  • Experience and proficiency in coding in a language such as C, C++, C#, Java, Python, Javascript, Go or Rust
  • Good knowledge of algorithms and fundamental computer science concepts, relational databases, API design, and building user interfaces
  • At least 5 years of experience building distributed systems in the cloud with service based architecture, using frontend frameworks to create rich, deep, web applications, and experience with the best practices to test, maintain, and launch cloud based software
  • At least 1 year of experience leading or coordinating multi-developer efforts, including planning and technical breakdown
Job Responsibility
Job Responsibility
  • Build customer-facing features that represent the core of our product, including document and image/multi-modal processing, collaborative review tools, organization, translation tools, search, review, and more
  • Use AI technologies to find the evidence rapidly such as document classification, predictive coding, transfer learning and LLMs
  • Collaborate with one or more of the Product, Design, Engineering Operations, Security Engineering, and DevOps teams to build out and implement new features that are used in our production environments
  • Help with scaling our system to larger datasets with hundreds of millions of documents
  • Provide Technical Mentorship to other engineers by both sharing your technical knowledge and becoming an expert in an area of our code base
  • Be a Code Reviewer by reviewing code developed by others using your knowledge of programming languages, design patterns, and best practices
  • Fix defects in our product by triaging product or system issues and writing code to debug, track and resolve these issues
  • Provide on-call support for the product by answering questions from customers, triaging defects and exceptions, and carrying the pager
  • Contribute to documentation for internal engineering consumption or for external the Everlaw platform
  • Do technical interviews to help us recruit engineers and grow the team
What we offer
What we offer
  • Equity program
  • 401(k) retirement plan with company matching
  • Health, dental, and vision
  • Flexible Spending Accounts for health and dependent care expenses
  • Paid parental leave and approximately 10 days (80 hours) per year of sick leave
  • Seventeen paid vacation days plus 11 federal holidays
  • Membership to Modern Health to help employees prioritize mental health and wellness
  • Annual allocation for Learning & Development opportunities and applicable professional membership dues
  • Company-sponsored life and disability insurance
  • Work in Downtown Oakland, just steps from the BART line and dozens of restaurants
  • Fulltime
Read More
Arrow Right

Senior AI Product Engineer

As a one person team to start, you are both a product lead and the technical SME...
Location
Location
Australia , Melbourne
Salary
Salary:
Not provided
frankieone.com Logo
FrankieOne
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Recent experience in building AI applications with end to end ownership
  • 10 plus years experience in engineering teams in an Agile environment using JS based frameworks like React
  • 5 plus years developing & supporting Full Stack TS-based SaaS applications production in AWS/Cloud ecosystem
  • Experience in HTML5, ES6, CSS3/Sass, javascript, typescript, React, React Native for Web (optional), npm and other front-end technologies to deliver enterprise grade frontend applications
  • Experience in depth of back-end oriented technologies such as nodejs, typescript for managing BFF
  • Knowledge and experience in tracking technological developments especially AI with vendor offerings and ability to quickly evaluate their value proposition e.g AWS Bedrock
  • Experience in architecting & building enterprise grade AI applications with Data and AI governance, AI gateways, context management (RAG), inference/prompt management, tools/functions (MCP, A2A), memory & fine-tuning
  • Experience in capturing business requirements from stakeholders to documenting, architect and building AI applications for both internal and external users
  • Experience in designing web applications based on AWS well architectured principles, 12 factor web application principles, cloud based software architecture patterns (pub-sub, saga, circuit breaker etc)
  • Experience in designing reactjs based frontend and backend in nodejs or golang
Job Responsibility
Job Responsibility
  • Inspire others
  • Design with quality
  • Collaborate
  • Be proactive
  • Be an advocate for FrankieOne, for our product, and our values
Read More
Arrow Right

Senior Frontend Engineer

As a frontend engineer at Inflection, you will craft intuitive, responsive, and ...
Location
Location
United States , Palo Alto
Salary
Salary:
175000.00 - 350000.00 USD / Year
inflection.ai Logo
Inflection AI
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Have 4+ years of experience building and maintaining production-grade web applications
  • Are fluent with React, Next.js, TypeScript, and frontend performance debugging tools (e.g., Lighthouse, Chrome DevTools, Web Vitals)
  • Have shipped interactive UIs from scratch—ideally handling real-time updates, accessibility, and responsive design
  • Understand trade-offs between UX richness, responsiveness, performance, and maintainability
  • Have designed systems balancing experimentation and rapid iteration with long-term scalability
  • Are energized by working in a fast-moving, cross-functional environment with deep technical challenges
  • Have a bachelor’s degree or equivalent in a related field to the offered position requirements
Job Responsibility
Job Responsibility
  • Architect and develop performant, maintainable frontend systems using Next.js, TypeScript, and React
  • Collaborate with researchers to surface advanced model behaviors—including tool use, RAG, and personalization—through intuitive UX paradigms
  • Develop and maintain internal UI components and design systems used across multiple product surfaces
  • Integrate real-time data and analytics pipelines to visualize assistant behavior, model performance, and user feedback
  • Build developer infrastructure to support fast iteration cycles: hot reloading, component testing, E2E automation, and visual diffing
  • Partner across the stack with backend and platform teams to ship end-to-end features with minimal latency and maximum reliability
  • Contribute to a culture of high code quality, continuous improvement, and shared ownership
What we offer
What we offer
  • Diverse medical, dental and vision options
  • 401k matching program
  • Unlimited paid time off
  • Parental leave and flexibility for all parents and caregivers
  • Support of country-specific visa needs for international employees living in the Bay Area
  • Competitive stock options
Read More
Arrow Right

Senior Frontend Engineer

This summer, Inworld launched a new platform for consumer AI applications, and w...
Location
Location
Canada , Vancouver
Salary
Salary:
150000.00 - 200000.00 CAD / Year
inworld.ai Logo
Inworld AI
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Excellent programming skills and experience in JavaScript and TypeScript
  • Experience developing full-featured React apps, using popular libraries such as React Router and React Query
  • Experience with popular frontend tools and libraries (MUI, Emotion, PostCSS, React Testing Library, Playwright, etc.)
  • Excellent verbal and written communication skills, can collaborate and coordinate with other roles and engineer with ease, trusted and well-regarded teammate
  • Candidates must be based in the Vancouver, BC area or willing to relocate
Job Responsibility
Job Responsibility
  • Establishing prioritized feature scope: Collaborate with the PMs, engineers and leads to determine the biggest product needs to focus on now
  • Collaborating, executing, delivering, feedback: This is the core of the building loop. We aim to optimize for both speed and quality
  • Reflecting and driving improvements: Advocate for and realize foundational improvements, even while staying busy with feature work
What we offer
What we offer
  • equity and benefits
  • Fulltime
Read More
Arrow Right

Senior Frontend Engineer

This summer, Inworld launched a new platform for consumer AI applications, and w...
Location
Location
United States , Mountain View
Salary
Salary:
200000.00 - 250000.00 USD / Year
inworld.ai Logo
Inworld AI
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Excellent programming skills and experience in JavaScript and TypeScript
  • Experience developing full-featured React apps, using popular libraries such as React Router and React Query
  • Experience with popular frontend tools and libraries (MUI, Emotion, PostCSS, React Testing Library, Playwright, etc)
  • Excellent verbal and written communication skills, can collaborate and coordinate with other roles and engineer with ease, trusted and well-regarded teammate
Job Responsibility
Job Responsibility
  • Establishing prioritized feature scope: Collaborate with the PMs, engineers and leads to determine the biggest product needs to focus on now
  • Collaborating, executing, delivering, feedback
  • Reflecting and driving improvements: Advocate for and realize foundational improvements, even while staying busy with feature work
What we offer
What we offer
  • equity and benefits
  • Fulltime
Read More
Arrow Right

Senior Vue/Nuxt Frontend Engineer

Flanks is shaking up the wealth management industry by making it simpler and way...
Location
Location
Spain , Barcelona
Salary
Salary:
Not provided
vuejs.org Logo
Vue
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Expert-level frontend skills with Vue + Nuxt, including scalable component architecture, state management, routing, and performance tuning
  • Real-time UI experience using WebSockets/SSE or other event-driven streaming patterns
  • Strong experience building complex dashboards and data visualizations (D3.js, Cytoscape, Vue Flow, or similar)
  • Comfortable using Docker / Docker Compose for local multi-service development
  • Familiarity with backend concepts, API design, and event schemas
  • 7+ years in software engineering (senior-level)
  • Fluent in Spanish and English
Job Responsibility
Job Responsibility
  • Own the architecture of the AI/multi-agent frontend (Vue + Nuxt), from early design to production readiness
  • Maintain and evolve tooling, CI/CD, testing strategy, and internal component libraries relevant to the AI product area
  • Build event-driven UIs using WebSockets/SSE to show streaming agent responses, live logs, system state transitions, execution traces
  • Ensure all real-time views are smooth, performant, and reliable
  • Build rich, interactive components for conversation UIs, agent graphs/flows, timelines, status panels, and debugging views
  • Craft dense financial data dashboards that support auditing, validation, and decision-making
  • Work closely with backend, ML, and infra teams to define events, APIs, and schemas
  • Ensure the frontend reflects the underlying multi-agent system with accuracy and clarity
  • Partner with Product and Design to create UX patterns for AI interactions
  • Mentor engineers on frontend best practices, especially around real-time apps and visualization
What we offer
What we offer
  • A cool office between Sants Estació and Plaça Espanya with stunning views of Barcelona
  • Flexible working hours and hybrid work options
  • Paid day off on your birthday
  • Weekly fresh fruit, coffee, and tea on tap
  • Friday happy hours after our all-hands meetings
  • Team-building events to bond and have fun
  • Health insurance and flexible compensation with Alan
  • A digital canteen, thanks to Nora Real Food, subsidised at 50%
  • A yearly training budget to keep growing
  • Fulltime
Read More
Arrow Right

Senior Frontend Engineer (UI/UX)

Embark on a transformative journey as a Senior Frontend Engineer (UI/UX). At Bar...
Location
Location
United States , Whippany
Salary
Salary:
120000.00 - 175000.00 USD / Year
barclays.co.uk Logo
Barclays
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Designing, building, testing, and implementing responsive UIs using React, React Testing Library, React Query, TypeScript, JavaScript, Redux, Angular, HTML, CSS, Styled Components, and ES6
  • Using Figma or similar tools to inspect design specs, collaborate with designers, and ensure accurate UI implementation
  • Applying UI/UX principles to deliver smooth, intuitive user experiences with good attention to detail
  • Writing clean, efficient, maintainable code using object-oriented design principles
  • Working with build tools and CI/CD pipelines such as GitLab
  • Exposure to Java, databases, or AI-driven technologies
  • Experience with cloud platforms such as AWS or Azure
  • Understanding containerization technologies like Kubernetes and Docker
  • You may be assessed on the key critical skills relevant for success in this role, such as risk and controls, change and transformation, business acumen, strategic thinking, digital and technology, as well as job-specific technical skills.
Job Responsibility
Job Responsibility
  • Development and delivery of high-quality software solutions by using industry aligned programming languages, frameworks, and tools. Ensuring that code is scalable, maintainable, and optimized for performance
  • Cross-functional collaboration with product managers, designers, and other engineers to define software requirements, devise solution strategies, and ensure seamless integration and alignment with business objectives
  • Collaboration with peers, participate in code reviews, and promote a culture of code quality and knowledge sharing
  • Stay informed of industry technology trends and innovations and actively contribute to the organization’s technology communities to foster a culture of technical excellence and growth
  • Adherence to secure coding practices to mitigate vulnerabilities, protect sensitive data, and ensure secure software solutions
  • Implementation of effective unit testing practices to ensure proper code design, readability, and reliability
  • To advise and influence decision making, contribute to policy development and take responsibility for operational effectiveness. Collaborate closely with other functions/ business divisions
  • Lead a team performing complex tasks, using well developed professional knowledge and skills to deliver on work that impacts the whole business function. Set objectives and coach employees in pursuit of those objectives, appraisal of performance relative to objectives and determination of reward outcomes
  • If the position has leadership responsibilities, People Leaders are expected to demonstrate a clear set of leadership behaviours to create an environment for colleagues to thrive and deliver to a consistently excellent standard. The four LEAD behaviours are: L – Listen and be authentic, E – Energise and inspire, A – Align across the enterprise, D – Develop others
  • OR for an individual contributor, they will lead collaborative assignments and guide team members through structured assignments, identify the need for the inclusion of other areas of specialisation to complete assignments. They will identify new directions for assignments and/ or projects, identifying a combination of cross functional methodologies or practices to meet required outcomes
What we offer
What we offer
  • Competitive holiday allowance
  • Life assurance
  • Private medical care
  • Pension contribution
  • This position is eligible for an incentive award
  • Barclays employees are eligible for a suite of competitive and generous employee benefits, including medical, dental and vision coverage, 401(k), life insurance, and other paid leave for qualifying circumstances
  • Fulltime
Read More
Arrow Right