Jobs JavaScript / Front-End

Senior Frontend Engineer

About Us
Peratera is a UK-based fintech company, founded in 2022 and authorised by the FCA as an Electronic Money Institution.

We are building a modern, all-in-one payment platform that enables businesses to manage global payments and financial operations seamlessly.

Our solution allows companies to open multi-currency accounts, send and receive payments worldwide, and manage cross-border transactions from a single platform.

Our mission is to simplify global finance and remove friction from international business operations.

Your Mission 

As a Senior Frontend Engineer, you will be part of the team building and evolving the user-facing applications behind our financial platform.

This is a hands-on engineering role where you will develop new functionality, improve existing solutions, and contribute to frontend architecture and technical decisions. You will work closely with Backend Engineers and Product to deliver reliable and intuitive experiences for users managing financial operations.

Your Tech Environment

You will work across a modern frontend stack alongside existing platform components:

• Frontend: Angular, React, TypeScript, JavaScript, Tailwind CSS, HTML, CSS
• Existing Components: jQuery 3.7.0, Materialize, funnelEvents.js, bankElements.js
• Backend: PHP 8.3.26, CodeIgniter 3.1.8
• Data & Infrastructure: MySQL 8.0, Redis 7.4

What You’ll Do 

• Own frontend development from technical design through implementation, testing, and production delivery
• Build and evolve user-facing applications for payments, accounts, transactions, and other financial workflows
• Develop reusable UI components and features using Angular, React, TypeScript, and Tailwind CSS
• Translate product and business requirements into clear technical solutions and pragmatic frontend implementations
• Contribute to frontend architecture, technical decisions, and the evolution of shared frontend patterns and standards
• Integrate frontend applications with REST APIs and backend services, working closely with Backend Engineers on API contracts and end-to-end functionality
• Work with existing production codebases, improving legacy components while introducing modern frontend solutions where appropriate
• Identify and address frontend issues related to performance, reliability, security, and user experience
• Write well-tested code and participate in code reviews, debugging, technical discussions, and knowledge sharing
• Collaborate with Product, UX/UI, QA, and DevOps to deliver features from initial requirements through production

What We’re Looking For

• 5+ years of professional experience in frontend engineering
• Strong hands-on experience with modern Angular and React, including Angular 16+ and React 17+
• Proficiency in TypeScript and JavaScript, with a solid understanding of component-based frontend architecture
• Experience building complex interfaces and reusable UI components with Angular, React, and Tailwind CSS
• Practical experience with state management and reactive programming using NgRx, Redux, Zustand, RxJS, or similar technologies
• Experience integrating frontend applications with REST APIs, authentication, and authorization flows, including OAuth2, OIDC, and JWT
• Experience with unit and integration testing, debugging, performance optimisation, Git, CI/CD, and code review practices
• Ability to work confidently with existing production codebases, understand unfamiliar systems, and improve them without unnecessary rewrites
• Ability to take ownership of frontend solutions, make sound technical decisions, and work effectively with Backend Engineers, Product, QA, and UX/UI
• Strong attention to code quality, security, performance, and user experience

Nice to Have

• Background in fintech, banking, payments, or other regulated environments
• Hands-on work with back-office systems, admin portals, dashboards, or operational tools
• Understanding of frontend security principles, including XSS/CSRF prevention and secure handling of sensitive data
• Familiarity with PHP, CodeIgniter, micro-frontends, modular frontend architecture, or design systems
  
   

What You’ll Get

• Competitive, market-aligned compensation - discussed openly at first interview
• Direct impact on architecture and strategic platform decisions from day one
• A real fintech platform running at production scale - not a demo environment
• Exposure to modern cloud-native, AI-assisted, and Open Banking systems
• Fully remote setup with flexible hours and an international, highly skilled team

Sounds like a match? Send us your CV - we’re excited to get to know you.

We are expanding our team and looking for a Shopify Developer with a creative approach to conventional coding challenges. Are you someone who understands the intricacies of web development and has the skills to craft beautiful, efficient websites? If yes, we're looking for you!

Key Qualifications:
Understands Shopify's system and environment
Proficiency in core web technologies: JavaScript, HTML, and CSS.
Experience with TailwindCSS is desirable, but not a must.
Proficiency in React is beneficial, adding to your toolkit.
A problem-solver at heart, with an ability to understand logic and devise innovative solutions.
A track record of thinking outside the box and adding a unique twist to your work.

What We Offer:
We value innovation and strive to merge cutting-edge technology with practical functionality. We're not just seeking an employee; we're looking for a team member who is ready to contribute their distinct viewpoint to our collective efforts.

If you have a zest for web development, stay abreast of technological advancements, and are eager to thrive in a workspace that promotes growth and creativity, we encourage you to apply.

Byteex

We are looking for a junior web developer to join our team full-time. You will help us build and improve websites for e-commerce brands. If you enjoy coding and want to grow your skills, this role is a good fit.
 

What you should know

JavaScript, HTML, and CSS.

Basic understanding of Shopify is a plus.

Good problem-solving skills and a desire to learn.
 

What we offer

A place to grow your skills.

Work on real projects with a supportive team.

A creative environment where your ideas matter.

If you want to start your career in web development and be part of a team that values growth and learning, we would love to hear from you.

About the role:

We are looking for an experienced D365 CRM Developer to join a development team working on a project to set up a manual quoting solution and the integration between Microsoft Dynamics 365 CRM and the quoting system.

You will work as part of a small team consisting of 1 Solution Architect and 1–2 Developers, contributing to the development, configuration, integration, and continuous improvement of the solution.

Key Responsibilities

• Develop and configure solutions within Microsoft Dynamics 365 CRM
• Support the implementation of a manual quoting process and related business workflows
• Develop and maintain integrations between D365 CRM and the external quoting system
• Customize D365 entities, forms, views, business processes, and workflows
• Develop custom functionality using JavaScript/TypeScript and Power Platform
• Implement and maintain API-based integrations
• Work with Power Automate to automate business processes and workflows
• Participate in technical discussions and collaborate closely with the Solution Architect
• Analyze business and technical requirements and translate them into scalable CRM solutions
• Troubleshoot issues, perform testing, and support production fixes
• Contribute to technical documentation and knowledge sharing

Required Skills & Experience

• 3+ years of experience with Microsoft Dynamics 365 CRM / CE development
• Strong experience with D365 CRM customization and configuration
• Good knowledge of Microsoft Power Platform, particularly:
• Power Apps
• Power Automate
• Strong JavaScript/TypeScript skills
• Experience developing CRM integrations and APIs
• Knowledge of Dataverse
• Experience with custom workflows, business rules, plugins, and/or custom CRM components
• Understanding of REST APIs and integration patterns
• Experience working with external systems and data synchronization
• Good understanding of CRM architecture and development best practices
• Ability to work independently while collaborating closely with a Solution Architect and other developers
• Good communication skills and ability to work in an international team

Nice to Have

• Experience with quoting, pricing, sales, or CPQ-related solutions
• Experience integrating D365 CRM with external quoting or ERP systems
• Knowledge of C# / .NET and Dynamics 365 plugins
• Experience with Azure services and Azure-based integrations
• Experience with Twilio, DocuSign, or other third-party integrations
• Previous experience in insurance, financial services, or other enterprise environments

We are building a revolutionary AI-based image and video processing platform and are looking for an Integrations Engineer to help expand our customer base through your technical expertise. We are open to candidates who can contribute significantly to developing our solutions and improving the customer experience.

​

Role Overview
​The responsibilities of a Solutions Engineer include sharing expertise on the product and its integration—specifically focusing on front-end understanding and a strong overall grasp of web technologies. You will use your analytical and interpersonal skills to guide our clients and maximize the value they gain from using our technology.
 

​The ideal candidate should have excellent communication and interpersonal skills, as well as the ability to meet KPIs and deadlines, demonstrating strong analytical abilities.

​Key Responsibilities

• Be the Product Expert: Act as the product expert and trusted advisor that clients can turn to for guidance on maximizing value from our technology.
• Expand Technical Expertise: Gain experience in front-end and back-end development, web optimization, performance best practices, AI/ML, cloud computing, media compression, and CDN.
• Support & Troubleshoot: Support customers’ technical queries, solve integration issues, and demonstrate the possibilities of the technology.
• Onboard Customers: Manage the technical onboarding of new customers and translate their desired outcomes into an implementation plan that will provide value.
• Define Requirements: Define new technical requirements for integration and prioritize project timelines.
• Cross-functional Collaboration: Ensure all customer requests and issues are handled promptly, working in collaboration with relevant teams including Customer Success, R&D, Sales, and Marketing.
• Quality Assurance: Utilize QA practices to ensure high-quality integrations

Requirements

• Language Proficiency: Strictly C1-C2 English level required.

  Candidates at an Upper-Intermediate (B1-B2) level will not be considered. Exceptional written and verbal presentation skills are a must.

• Working Hours: High flexibility and ability to operate within the US time zone.
   

​Technical Skills:

• 5+ years of experience as a Solutions Engineer, Front-End professional, or in QA within a global, fast-paced environment.
• Experience with Full-Stack technologies (e.g.,Node.js, React, Angular) or QA skills (e.g., automated testing, performance testing).
• ​Hands-on experience with web and cloud technologies.
• Experience with basic debugging/QA tools (e.g., Chrome Dev Tools).
• Problem Solving: Ability to effectively assess and quickly resolve technical issues while working with both technical and non-technical teams. High-level technical, project, and problem-solving skills.

• Mindset: Strong critical thinking and analytical skills with an entrepreneurial, proactive, and result-oriented mindset. Highly motivated, a fast learner, and open-minded.

   

Nice to Have​

• BS, BA, BEng degree or equivalent in Computer Science or a related field.
• ​Experience with Full-Stack technologies (e.g., Node.js, React, Angular) or automated/performance QA testing skills.
• ​Relevant certifications, courses, or experience in adjacent technologies.

We OFFER:

• ​A fast-paced, highly professional, international team environment with a flat structure and rapid decision-making.
• ​Competitive compensation packages commensurate with your background and product portfolio.
• ​Flexible, remote-first workflow optimized for seamless global alignment.
• Medical Insurance in Ukraine and a Multisport program in Poland.
• Offices in Ukraine (Kyiv, Kharkiv) and Poland (Wroclaw) or Remote.
• Paid vacation, sick leave, and official holidays.
• Legal & Accounting services.
• The company provides all necessary equipment.
• English classes and Education reimbursement.

Why this role exists:

The purpose of this role is to design and implement scalable software solutions, ensuring high-quality delivery within established timelines. The role focuses on solving complex technical challenges, improving engineering practices, and contributing to software reliability and performance. A Senior Developer mentors peers, shares technical expertise, and collaborates with cross-functional teams to deliver solutions that meet business requirements.

What you’ll drive:

Architecture and development

• Designing and implementing scalable and efficient software architectures.
• Writing, testing, and debugging complex code for new and existing software applications.
• Delivering code to production in a timely manner according to business expectations.

Leadership and collaboration

• Providing guidance and mentoring to junior engineers and team members.
• Conducting thorough code reviews to ensure code quality, security, and best practices.
• Managing software development projects, ensuring timely delivery and quality.
• Collaborating with cross-functional teams to design and align technical solutions that meet business objectives
• Communicating effectively with stakeholders on technical concepts.

Engineering processes and quality assurance

• Creating and maintaining comprehensive technical documentation for software development and system design.
• Creating and maintaining comprehensive technical documentation for software development and system design.
• Researching and implementing new technologies and methodologies to improve software performance and development processes.
• Identifying and resolving complex software issues and technical challenges.
• Developing and enforcing testing protocols to ensure software reliability and performance.
• Driving continuous improvement in software development practices and processes.

What makes you a GR8 fit:

Must-have

• Minimum of 5 years of experience in a similar senior engineering role;
• Deep knowledge of JavaScript, TypeScript, React, HTML, CSS, state management libraries, build tools, package managers, and web testing frameworks;
• Experience with microfrontend architectures and Module Federation patterns (Webpack Module Federation, dynamic remote loading, shared dependency management);
• Ability to analyze code, debug complex issues, optimize performance, and develop proofs of concept (PoCs);
• Understanding of web performance metrics and browser performance optimization, including Core Web Vitals (LCP, INP, CLS), FCP, TTFB, TBT, Speed Index, Time to Interactive (TTI), bundle size, and JavaScript parsing and execution performance;
• Understanding of browser internals, SPAs and static websites, client-server architecture, REST APIs, SSR, web security, and UI/UX patterns;
• Effective communication skills with both technical and non-technical audiences;
• Upper-Intermediate English level.

About Shop Innovator
We help premium, high-ticket Shopify brands scale by building high-converting sales machines. We are looking for a hands-on Shopify professional who can build polished storefronts, maintain client stores, and manage day-to-day website updates.

About the Role
This hybrid role combines Shopify front-end development, website maintenance, content management, and direct client support. You will convert Figma designs into code, optimize storefront performance, and serve as a reliable technical point of contact for our clients and internal team.

What You'll Do

• Shopify Development: Build responsive pages, sections, and OS 2.0 templates using Liquid, HTML5, CSS3, and JS. Convert Figma designs into pixel-perfect code using Git/GitHub workflows.
• Store Management & Maintenance: Maintain client stores, troubleshoot theme bugs, install/configure apps, manage content updates, and optimize page speed and Core Web Vitals.
• Client & Team Collaboration: Communicate directly with clients via email and calls (5–10 calls/month) to explain technical solutions, gather requirements, and manage task updates in ClickUp.

• CRO & Marketing Support: Build landing pages, add conversion elements (reviews, trust badges, FAQs), and configure third-party tools like Klaviyo, Judge.me, GA4, and Meta Pixel.

   

What We're Looking For

• At least three years of professional Shopify development or website-management experience.
• Strong knowledge of Shopify Liquid.
• Strong HTML5, CSS3, and JavaScript skills.
• Experience with Shopify Online Store 2.0.
• Experience creating reusable Shopify sections, blocks, and templates.
• Experience converting Figma designs into responsive Shopify pages.
• Experience with Git and GitHub.
• Experience installing and configuring Shopify apps.
• Experience managing products, collections, pages, blogs, navigation, and website content.
• Working knowledge of ecommerce SEO and on-page optimization.
• Strong understanding of responsive web development.
• Excellent attention to visual detail.
• Strong written communication skills.

• Ability to produce accurate, polished work with minimal supervision.

   

Who You Are

You’re someone who:

• Loves working with Shopify.
• Is reliable, responsive, and dependable.
• Works quickly without sacrificing accuracy.
• Notices UX, content, and visual issues before anyone else.
• Has a strong eye for design, spacing, consistency, and presentation.
• Thinks beyond writing code and considers the full customer experience.
• Understands that premium products require trust-building content and thoughtful presentation.
• Enjoys solving problems independently.
• Is highly organized and communicates clearly.
• Takes ownership of projects from assignment through testing and deployment.
• Tests everything before marking a task complete.
• Can comfortably manage multiple client projects and priorities.
• Collaborates well with designers, marketers, project managers, and clients.
• Is comfortable asking questions when requirements are unclear.
• Looks for ways to improve a page instead of simply completing the requested update.

Bonus Points

Experience with any of the following would be an asset: Shopify Markets, Shopify Flow, Shopify Functions, Checkout UI Extensions, Metafields and metaobjects, Klaviyo, Judge.me, Shopify Search & Discovery, GA4 and Google Tag Manager, Meta Pixel, Schema markup, Core Web Vitals optimization, Accessibility and WCAG standards, Conversion rate optimization, A/B testing platforms, Image and video editing tools, AI coding assistants such as Cursor, GitHub Copilot, or ChatGPT.

Schedule: Remote with required 3–4 hours of daily overlap with 10 AM – 5 PM EST.

Why Join Shop Innovator?

• Work with premium ecommerce brands rather than commodity products.
• Build websites that directly contribute to business growth.
• Be part of a small, experienced, and collaborative team.
• Work on a variety of interesting Shopify projects.
• Develop your knowledge of high-ticket ecommerce, UX, CRO, and customer buying psychology.
• Learn from experienced ecommerce strategists, designers, developers, and marketers.
• Enjoy flexible remote working hours.
• Grow with the agency as we expand.

Ready to build high-converting Shopify experiences with us? Click Apply Now to submit your application!

We are looking for a senior frontend engineer to build high-performance 3D scientific visualization directly in the browser.

You will work at the intersection of frontend engineering, GPU programming, and large-scale data visualization. The core challenge is making complex 3D and time-varying datasets interactive in the browser without requiring users to download or fully load them first.

What you will do

• Build browser-based 3D visualization using TypeScript and WebGPU.
• Render large meshes, point clouds, volumetric fields, and other scientific data.
• Integrate visualization with asynchronous and random-access data streaming.
• Design efficient GPU buffer management, caching, and incremental scene updates.
• Build React-based UI around the visualization experience.
• Profile and optimize CPU, GPU, memory, and network performance.

• Work closely with systems, backend, and GPU engineers on end-to-end data delivery.

   

What we are looking for

• Strong production experience with TypeScript / JavaScript.
• Practical experience with WebGPU, or deep WebGL experience with an interest in moving to WebGPU.
• Strong understanding of performance optimization in browser applications.
• Experience with React or another modern frontend framework.
• Good knowledge of vector math, coordinate systems, cameras, transforms, and spatial data structures.

Nice to have

• Experience with Three.js, Babylon.js, vtk.js, React Three Fiber, or custom rendering engines.
• WGSL, GLSL, CUDA, Vulkan, DirectX, or Metal experience.
• Scientific visualization experience with ParaView, VTK, VisIt, or similar tools.
• Volume rendering, isosurfaces, unstructured meshes, point clouds, particles, or large geometry.
• LOD systems, spatial partitioning, octrees, BVHs, or GPU-driven rendering.
• Background in CAD, simulation, geospatial, medical imaging, games, or visualization software.

We are looking for a JavaScript / SCADA Engineer with strong experience in web-based industrial applications, SCADA/HMI systems, and engineering automation.

You will work at the intersection of modern web development and industrial automation, building responsive HMI/SCADA interfaces, reusable frontend components, dashboards, alarms, diagnostics, and engineering automation workflows.

This role is ideal for someone who understands both software engineering and industrial control environments.

What You’ll Do

• Develop and maintain web-based SCADA / HMI applications
• Build dashboards, visualization screens, alarm interfaces, and diagnostic tools
• Design reusable frontend components and scalable application architecture
• Integrate SCADA systems with PLC environments and industrial data sources
• Work with OPC UA and other industrial communication protocols
• Build integrations using REST APIs, JSON, and structured data models
• Automate engineering workflows, including PLC and engineering data import and processing
• Reduce manual engineering effort through tooling and automation
• Contribute to automated testing, CI/CD, and deployment pipelines
• Collaborate with automation engineers, software developers, and technical stakeholders

Must-Have Requirements

• Strong commercial experience with JavaScript
• Strong knowledge of TypeScript, HTML5, CSS, Node.js
• Experience with Git, REST APIs, JSON, and data modeling
• Experience designing frontend architecture and reusable components
• Experience with automated testing and CI/CD pipelines
• Strong knowledge of SCADA / HMI applications
• Experience working with PLC environments
• Hands-on experience with OPC UA and industrial communication protocols
• Experience with at least one SCADA platform:
  • Ignition
  • atvise
  • WinCC
  • zenon
  • FactoryTalk
  • AVEVA / Wonderware
  • Siemens Industrial Software
• Experience developing web-based HMI/SCADA dashboards and visualization interfaces
• Experience with engineering automation and processing PLC / engineering data

Nice to Have

• MQTT
• Java
• Python
• SQL
• Docker
• Linux
• Siemens TIA Portal
• PLC engineering fundamentals
• Experience with warehouse automation systems and processes

What We’re Looking For

• Strong problem-solving and debugging skills
• Ability to work independently
• Practical engineering mindset
• Strong attention to reliability and maintainability
• Comfortable collaborating across software and industrial automation teams

If you have strong JavaScript skills combined with hands-on SCADA and industrial automation experience, we’d love to hear from you.

3DFrames is a product company developing 3D solutions for B2B clients. Our projects include interactive visualizations, 3D configurators, STEM animations, and high-performance web applications.

We are looking for a Junior Three.js Developer to join our team and work on interactive 3D solutions for the web.

Format: Remote, full-time
Location: Ukraine / Europe
Company: 3DFrames
Company type: Product
Salary: up to $700 gross
English: sufficient for working with technical documentation

Core Requirements & Tech Stack

• Three.js, React, Redux, Redux-Saga, TypeScript
• 1+ years of relevant experience with Three.js, WebGL, or 3D graphics
• Basic understanding of 3D mathematics: vectors, matrices, and transformations
• Experience working with 3D models in GLTF / GLB / FBX / OBJ formats
• Understanding of Git and basic knowledge of GitHub / GitLab
• English sufficient for working with technical documentation

Responsibilities

• Develop 3D scenes, animations, and interactive elements using Three.js / WebGL
• Integrate 3D models into web projects, including preparation, optimization, and import of GLTF / FBX assets
• Work with textures, lighting, materials, and cameras
• Optimize 3D scenes for fast and efficient rendering in the browser
• Collaborate with developers, designers, 3D artists, and QA engineers
• Learn and apply new technologies and approaches in web-based 3D graphics

Will Be a Plus
 

• Tailwind CSS
• REST API
• Graph API
• Knowledge of 3D scene optimization
• Understanding of interactive 3D interfaces and UX in 3D

Team

You’ll be joining a team of 4 Developers, 1 Project Manager, and 2 QA Engineers.

What We Offer

• Full-time remote cooperation
• Cooperation via FOP
• Accounting support if needed
• 15 paid vacation days
• 5 paid sick days
• Paid public holidays
• Opportunity to grow within an experienced development team
• Hands-on experience with commercial web-based 3D products

Interview Process
 

HR Interview → Test Task → Technical Interview → Final Interview

Ready to join us? Apply now — your ideas and approach might be exactly the spark we’re looking for.

About the Role
Client is developing a SaaS platform for the inspection and analysis of engineering structures based on large-scale 3D data.
We are looking for a Senior 3D Web Engineer to strengthen our team and take ownership of advanced 3D visualization challenges, including the integration of next-generation rendering technologies such as WebGPU.
You will work on a production system built on LuciadRIA, handling complex datasets with high demands on performance, scalability, and precision.

Your Responsibilities

• Develop and optimize web-based 3D visualization features within our platform
• Work with and extend our LuciadRIA-based 3D engine
• Design and implement high-performance rendering pipelines using WebGPU
• Handle large-scale datasets (e.g. photogrammetry, point clouds, meshes)
• Improve rendering performance, memory usage, and responsiveness
• Collaborate with frontend and backend developers (Angular, Node.js, TypeScript)
• Contribute to architectural decisions and guide less experienced developers

Tech Stack

• 3D Engine: LuciadRIA
• Frontend: TypeScript, Angular
• Backend: Node.js
• Infrastructure: GitLab, PostgreSQL, S3-compatible storage

Required Skills

• Strong JavaScript skills
• Solid understanding of 3D fundamentals
• Experience with at least one 3D framework (LuciadRIA preferred)
• Strong experience in web-based 3D visualization using WebGPU
• Proven experience with real-time 3D rendering in the browser
• Experience optimizing performance in large or complex 3D scenes

Preferred Skills

• Backend experience (Node.js) and data integration
• Experience with geospatial 3D systems or large coordinate spaces
• Experience with photogrammetry, point clouds, or mesh processing pipelines
• Experience with Gaussian Splatting or similar rendering techniques

Software Engineer (SCADA Frontend / Engineering Automation) 
 

ZentixSoft is looking for a Software Engineer! 🚀
 
Your CV should specify SCADA and HMI experience/
 

Format: Full-Time Outstaffing, long-term remote project. 
 

💡 Why ZentixSoft? 
💸 Salary Review: A structured system of compensation reviews aligned with your engineering growth. 
⚖️ Work-Life Balance: Sustainable workflows with no senseless overtime, helping you keep your resource fully charged. 
🦾 Trust and Transparency: Zero micromanagement and no invasive time-trackers—we fully trust your professional autonomy. 
🎁 Gifts & Culture: Corporate gifts for holidays, birthdays, and a true team atmosphere where your voice always matters.
 

🧩 Responsibilities:

• SCADA & HMI Development: Build reusable web-based frontend components, visualization screens, alarm/diagnostic views, and responsive user interfaces for industrial automation and warehouse systems.
• Engineering Automation: Develop scripts, import tools, and frameworks to process PLC/engineering data and support zero-engineering workflows.
• Architecture & Frameworks: Develop reusable SCADA libraries, navigate navigation/user interaction concepts, and standardize visualization components.
• Data Integration: Implement data models, import/transform engineering data, and build integration pipelines using Node.js, JSON, and REST APIs.
   

🎓 Requirements:

• Software Development: Strong commercial experience with JavaScript, TypeScript, HTML5, CSS, Node.js, Git, REST APIs, and JSON.
• SCADA / HMI Experience: Hands-on commercial expertise developing SCADA and/or HMI applications. (Note: Pure web frontend experience without industrial automation background is not sufficient).
• Industrial Protocols: Practical knowledge or strong understanding of PLC environments, OPC UA, and industrial communication protocols.
• SCADA Platforms: Commercial experience with at least one platform: Ignition, atvise, WinCC, zenon, FactoryTalk, AVEVA, Wonderware, or Siemens Industrial Software.
• Frontend Architecture: Solid background in building pipelines, UI architecture, automated testing, and CI/CD processes.
   

➕ Nice to Have:

• Experience with MQTT, Siemens TIA Portal, Java, Python, SQL, Docker, or Linux.
• Exposure to Warehouse Automation systems and processes.
   

📍 Project Details:

⏳ Duration: Long-term (Full-time).

📍 Location: Fully Remote 

We are extending our Integrity teams and seeking for several Senior Frontend Engineers with strong expertise in modern frontend technologies such as web components, React, and microfrontends. This role is ideal for engineers passionate about designing and delivering intuitive, high-performing, and reliable user interfaces that support our award-winning educational platform.

As a core contributor to our product development team, you will play a critical role in shaping the user experience of both existing and new applications. You will collaborate closely with backend engineers, designers, and product managers to create scalable and engaging solutions that meet the needs of educators and students worldwide.

Responsibilities: 

• Component Development:
  • Design, develop, and maintain highly efficient, reusable, and scalable web components using Stencil.js, TypeScript, and React.
  • Build modular and reusable UI components to ensure consistency and maintainability across projects.
• Architecture & Best Practices:
  • Establish and enforce best practices for component design, including accessibility (WCAG compliance), performance optimization, and responsive design.
  • Collaborate with the team to define the architecture of the design system or reusable component library.
• Integration & Collaboration:
  • Ensure seamless integration of web components into various applications, particularly within React projects.
  • Work closely with backend engineers to design APIs that enable efficient data flow and interaction with frontend components.
• Code Quality & Standards:
  • Write clean, maintainable, and well-documented code, adhering to modern standards and practices.
  • Perform regular code reviews and ensure adherence to best practices and coding standards.
• Testing & Debugging:
  • Create robust unit and integration tests for web components.
  • Debug and resolve performance bottlenecks and other frontend issues.
• Collaboration & Mentorship:
  • Work closely with designers and product managers to understand requirements and provide technical insights during the planning phase.
  • Mentor junior frontend engineers, sharing knowledge on web components, Stencil.js, TypeScript, and React.
• Performance Optimization:
  • Continuously improve the performance of web components, ensuring compatibility with various browsers and platforms.
  • Optimize assets and rendering pipelines for faster load times and better user experience.
• Documentation & Support:
  • Create comprehensive documentation for the developed reusable components, including usage guidelines and examples.
  • Provide technical support to teams integrating the components into their projects.
• Continuous Learning:
  • Stay up-to-date with emerging frontend technologies, particularly in web components and frameworks like Stencil.js and React.
  • Proactively suggest improvements to existing tooling, frameworks, or processes to enhance team efficiency and product quality.
• Cross-functional Collaboration:
  • Collaborate with DevOps to streamline CI/CD processes for frontend builds and deployments.
  • Ensure smooth handoff of frontend deliverables to QA and collaborate on addressing issues during testing.

Senior Frontend Engineer — React / TypeScript
⠀
ABOUT RANKTRACKER
⠀
Ranktracker is a SaaS platform for SEO professionals, agencies and businesses.
⠀
Our tools cover rank tracking, keyword research, competitor analysis, backlinks, website auditing, SERP analysis and AI search visibility.
⠀
We are based in Poland and work remotely.
⠀
THE ROLE
⠀
You will be the only frontend developer working on the Ranktracker application.
⠀
You will work closely with our senior backend developer and take ownership of the frontend.
⠀
We do not usually provide detailed Figma designs or pixel-perfect mockups. Most work comes from GitHub tickets containing requirements, screenshots, examples and acceptance criteria.
⠀
You need to be able to take a ticket, understand the problem, make sensible UI/UX decisions and deliver the finished feature independently.
⠀
CLAUDE CODE
⠀
We use Claude Code as part of our development workflow and expect you to use it effectively.
⠀
However, we are not looking for a vibe coder.
⠀
You must be a strong developer who actually knows how to code and understands the codebase, architecture and code you are writing.
⠀
Claude Code should make you faster. It should not replace your technical knowledge.
⠀
You should be able to review generated code, spot bad implementations, debug problems yourself, refactor properly and make sensible architectural decisions.
⠀
If you cannot explain how your code works, it should not be shipped.
⠀
WHAT YOU WILL WORK ON
⠀
• Build new Ranktracker tools and features
• Improve existing parts of the application
• Build dashboards, tables, charts and filters
• Work with large amounts of SEO data
• Integrate GraphQL and REST APIs
• Build responsive and reusable components
• Improve UI/UX
• Fix bugs and performance issues
• Test your own work before release
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FRONTEND STACK
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• React 19
• TypeScript
• Vite
• GraphQL + Apollo Client
• REST APIs
• Zustand
• Mantine UI v8
• React Router
• Nivo
• MapLibre GL
• i18next
• WebSockets / Rails ActionCable
• Playwright
• ESLint + Prettier
• Docker
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We use Mantine UI, but we do not rely heavily on presets. We often build our own components so we have full control over the markup, behaviour and styling.
⠀
BACKEND STACK
⠀
• Ruby on Rails API
• PostgreSQL
• Redis
• Sidekiq
• RSpec
⠀
You do not need to be a backend developer, but you should be comfortable working with APIs and working closely with the backend developer.
⠀
REQUIRED SKILLS
⠀
• 5+ years of frontend development experience
• Strong React and TypeScript experience
• Strong HTML and CSS
• GraphQL and REST API experience
• Good understanding of frontend architecture
• Experience with state management
• Experience building SaaS or data-heavy applications
• Strong debugging and problem-solving skills
• Good UI/UX judgement
• Ability to work independently
• Ability to work from GitHub tickets without detailed designs
• Good Git/GitHub workflow
• Comfortable using Claude Code properly
• Strong attention to detail
⠀
GOOD TO HAVE
⠀
• Mantine
• Apollo Client
• Zustand
• Playwright
• Nivo or other charting libraries
• MapLibre or mapping experience
• WebSockets
• i18next
• Docker
• Experience as the main frontend developer on a SaaS product
⠀
WHAT WE ARE LOOKING FOR
⠀
We want someone who can take ownership of the frontend and genuinely knows what they are doing.
⠀
You should be proactive, able to make sensible decisions and comfortable working without constant supervision.
⠀
If something does not make sense, raise it.
⠀
If the UX can be improved, suggest it.
⠀
If Claude Code produces something poor, fix it rather than accepting it.
⠀
If a feature is not properly tested, it is not finished.

Technical requirements:

• JavaScript (ES6+)
  • Event loop, scope, closures, async/await.
  • Spread/rest, destructuring.
  • Modular architecture.
  • Understanding of front-end performance optimization.
• React.js and its ecosystem
  • React (Hooks, Context API, React Router).
  • Redux Toolkit (thunks, RTK Query).
  • Working with forms (formik).
  • react-select, axios.
  • Architectural approaches: FSD, container/presenter, atomic design.
• TypeScript
  • Extensive experience in daily use (strict mode, generics, API typing, utility types).
  • Ability to build architecturally sound solutions.
• HTML5 / CSS3
  • Adaptive & responsive layout (mobile-first, desktop-first).
  • Flexbox і CSS Grid.
  • UI optimization for interfaces (admin panels, configurators).
• CSS preprocessors
  • SCSS module
• Tooling
  • Git (branches, code review, CI/CD integrations).
  • Vite — experience in configuration and optimization of builds.
  • NPM (working with monorepo and libraries).
• 3D and integration (advantage)
  • R3F (react-three-fiber), Three.js, PlayCanvas.
  • Threekit SDK, working with player APIs, writing service wrappers.
  • Optimizing the display of 3D models, integrating configurators.
• Testing (advantage)
  • Unit tests (Jest, React Testing Library).
  • E2E tests (Playwright / Cypress).
  • Understanding testing priorities: which scenarios are critical and which can be covered by smoke tests.

Good to have:

• Playcanvas (in particular, integrating models into scenes, managing objects and their parameters)
• Salesforce (understanding Salesforce integration)
• Shopify (experience creating or integrating custom React components into Shopify pages, working with plugins)
   

Additional knowledge that may be useful:

• Node.js - writing small services and API wrappers.
• Бандлери - Experience in setting up custom builds (Webpack, Rollup, Vite).
• Web 3D - understanding the principles of 3D in a browser (materials, lighting, optimization).
• Practice with 3D libraries - implementation of projects on React Three Fiber (R3F), Three.js, WebGL, (PlayCanvas, Threekit SDK would be a big plus).
• English language - level A2+ (basic communication, reading technical documentation).

Who suits us:

• Architectural thinking: able to balance between “doing it right” and “doing it on time.”
• Systematic communication: reports risks and progress in a timely manner.
• Responsibility: sees tasks through to completion, including integration into production.
• Knowledge sharing: documents complex decisions so that others can pick them up more quickly.

Domain:

• Web 3D configurators (furniture, interiors, household appliances) and their integration with e-commerce (Shopify, Salesforce).
• DAM system for managing 3D resources and working with them.
   

What you will be doing:

• Development and support of Web 3D configurators.
• Configuration of business logic for interaction with 3D objects (dynamic validation, attributes, rules).
• Development and updating of configurator interfaces (React, TypeScript).
• Integration of configurators into customer websites and e-commerce systems.
• Development of admin panels for managing 3D resources and users.
• Writing small services and wrappers for third-party APIs (Threekit, Shopify, Salesforce).

Working conditions at the company:

• We offer work on projects from scratch and support for existing projects;
• The opportunity to work on projects, offering your own technological solutions;
• Work with major international brands;
• A friendly and creative team;
• Professional growth;
• Full-time employment;
• Flexible work schedule;
• Paid sick leave and vacation.