Shopify Developer

🏢 Summary: Design and lead end-to-end technical architecture for Shopify (primarily Shopify Plus) stores, including headless and theme-based implementations. Develop complex integrations with enterprise systems and build custom Shopify applications using advanced platform capabilities. Act as a senior technical authority driving architecture, integrations, and development standards. 🗂️ Requirements: 5+ years in e-commerce solution architecture or senior technical role, Minimum 3 years of hands-on Shopify experience, Proven expertise with Shopify Plus and Shopify admin, Experience with headless Shopify architectures (Hydrogen/Oxygen), Experience developing custom Shopify apps, Hands-on use of Shopify Functions and Checkout UI extensions, Strong experience with Shopify REST and GraphQL APIs, Proficiency in HTML, CSS, JavaScript, TypeScript, React or Next.js, Expertise in MS Entity Framework, Experience integrating Shopify with ERP, OMS, or PIM systems 📃 Skills: Shopify, ShopifyPlus, Liquid, Hydrogen, Oxygen, ShopifyFunctions, CheckoutUI, REST, GraphQL, HTML5, CSS3, SCSS, JavaScript, TypeScript, React, Next.js, EntityFramework, ERP, OMS, PIM, WMS, CRM, CDP 🏢 Description: Shopify Architect About the Client Our client is an AI-native enterprise solutions company with purpose-built technology for public and private companies, governments, institutions, asset managers, and family offices. With headquarters in New York City and four global offices, they are supported by more than 300 engineers and delivery professionals across the globe. By centralizing and unifying data, automating workflows, and surfacing predictive insights, they enable organizations to scale operational excellence and generate alpha across complex enterprise environments. The Role Design and document the complete end-to-end technical architecture for new and existing Shopify (primarily Shopify Plus) stores, including storefront design (headless or theme-based), backend services, integration strategy, and security. Architect and develop complex system integrations between Shopify and mission-critical enterprise platforms such as ERP, OMS, PIM, WMS, CRM, and CDP, leveraging REST and GraphQL APIs. Expertly develop, customize, and maintain high-quality Shopify themes, working extensively with Liquid, HTML5, CSS3/SCSS, and JavaScript/TypeScript or other JS frameworks (React). Build and maintain custom Shopify applications (private or public) and implement advanced functionality using Shopify Functions and Checkout Extensibility to meet unique client requirements. Serve as the trusted technical advisor to client executives (CTO, CIO) and technical teams, providing expert guidance on Shopify. Partner with the Sales team to provide technical vetting, solution scoping, effort estimations, and compelling technical presentations to existing and prospective clients. Ensure adherence to development standards and practices. Requirements 5+ years of experience in e-commerce solution architecture, technical consulting, or an equivalent senior technical role with at least 3 years of Shopify experience. Proven expertise with the Shopify platform, especially Shopify Plus, its admin features, Liquid templating, and the app ecosystem. Proven expertise with headless Shopify architectures, including Hydrogen/Oxygen implementations. Experience developing custom Shopify apps, utilization of Shopify functions and Checkout UI extensions for advanced customizations. Strong hands-on experience with Shopify's APIs (REST and GraphQL) and a solid understanding of modern web technologies (HTML, CSS, JavaScript/TypeScript, React/Next.js). Expertise in the MS Entity Framework. Experience in architecting and implementing integrations with major enterprise back-office systems (ERP, OMS, PIM). Excellent communication skills. Ability for critical thinking & creativity. Having a systematic and logical approach to problem-solving and teamwork skills is crucial. Nice to Have Shopify Certification or other relevant e-commerce platform certifications. Prior experience in re-platforming from legacy systems. Familiarity with back-end languages (e.g., Node.js, Ruby). What We Offer Monthly compensation: 6,000 - 8,000 USD. Working model: Hybrid setup with 3 days from the office in the center of Warsaw, and 2 days remote. Contract type: Candidates can choose between a B2B contract or a Contract of Employment. We value creative problem solvers who learn fast, work well in an open and diverse environment, and enjoy pushing the bar for success ever higher. We do work hard, but we also choose to have fun while doing it.

🏢 Summary: Senior Software Engineer role focused on designing, developing, and integrating advanced Shopify (primarily Shopify Plus) solutions within enterprise environments. The position involves building custom applications, headless architectures, and complex integrations with core business systems. Hybrid full-time role in Warsaw with B2B or CoE contract options. 🗂️ Requirements: 5+ years of experience in e-commerce architecture or technical consulting, Minimum 3 years of hands-on experience with Shopify ecosystem, Strong experience with Shopify Plus, including admin and app ecosystem, Experience building custom Shopify applications, Experience with Shopify Functions and Checkout UI extensions, Experience with headless Shopify architectures, Hands-on experience with Microsoft Entity Framework, Experience working with Shopify REST and GraphQL APIs, Strong knowledge of HTML, CSS, JavaScript, TypeScript, Experience integrating Shopify with ERP, OMS, PIM or similar enterprise systems 📃 Skills: Shopify, ShopifyPlus, Liquid, Hydrogen, Oxygen, EntityFramework, REST, GraphQL, HTML, CSS, JavaScript, TypeScript, SCSS, ShopifyFunctions, CheckoutUI, Node.js, Ruby 🏢 Description: 💰 Salary: 21,500-28,700 PLN/Month 💻 Warsaw, Poland (Hybrid - 3 days in office, 2 days remote) 🕦 Full-time ☑️ B2B or CoE We’re looking for a Senior Software Engineer to join a fast-growing international tech company focused on building modern, data-driven platforms that power digital transformation in the financial and enterprise sectors. Requirements: 5+ years of experience in e-commerce architecture, technical consulting, or a comparable senior level role, with a minimum of 3 years focused on the Shopify ecosystem. Strong hands-on experience with the Shopify platform, particularly Shopify Plus, including admin capabilities, Liquid templating, and the broader app ecosystem. Proven experience building custom Shopify applications, including advanced customizations using Shopify Functions and Checkout UI extensions. Solid understanding of headless Shopify architectures, with experience in Hydrogen and Oxygen implementations. Hands-on experience working with Microsoft Entity Framework. experience working with Shopify APIs, including REST and GraphQL, along with strong knowledge of modern web technologies such as HTML, CSS, JavaScript and TypeScript. Demonstrated ability to design and deliver integrations with enterprise systems such as ERP, OMS, and PIM. Nice to have: Previous experience leading or contributing to re platforming projects from legacy systems. Familiarity with backend technologies such as Node.js and Ruby. Shopify certifications or other relevant e-commerce platform certifications. Key Responsibilities: Design and document end to end technical architectures for both new and existing Shopify (primarily Shopify Plus) stores, covering storefront implementation (headless or theme based), backend services, integration strategy, and security. Develop, customize, and maintain high quality Shopify themes using HTML5, Liquid, CSS3/SCSS, along with JavaScript and TypeScript. Implement and design complex integrations between Shopify and core enterprise platforms such as CRM, CDP, WMS, PIM, OMS, and ERP, utilizing GraphQL and REST APIs. Develop and manage custom Shopify applications, delivering advanced capabilities through Shopify Functions and Checkout Extensibility to support specific client requirements. Collaborate closely with the Sales team to support technical evaluations, define solution scope, estimate effort, and deliver clear, compelling technical presentations to clients. Provide technical guidance to stakeholders and engineering teams, advising on Shopify solutions, architecture decisions, and industry best practices.

🏢 Summary: Offer for an experienced React FrontEnd Developer to design and build responsive, high-performance user interfaces in a hybrid model in Warsaw. The role focuses on developing modern web applications using React and related technologies, with strong emphasis on testing, accessibility, and performance optimization. The position involves close collaboration with cross-functional teams to deliver robust, user-centric digital products. 🗂️ Requirements: 6+ years of experience in JavaScript development, 6+ years of experience in TypeScript development, Commercial experience with React.js, Experience with Redux, Hands-on experience with HTML5, Hands-on experience with CSS3, Ability to write cross-browser compatible code, Understanding of object-oriented programming concepts and design patterns, Knowledge of functional programming paradigms, Understanding of asynchronous programming, Experience with TDD, Experience with continuous integration, Knowledge of Git and branch management, Experience with front-end debugging tools, Experience working in Agile methodology 📃 Skills: JavaScript, TypeScript, React, Redux, Next.js, HTML5, CSS3, Git, TDD, CI, OOP, FP 🏢 Description: React FrontEnd Developer IT · Warsaw (City Center) · Hybrid About the Client Our Client is a fast-growing, international technology company that provides innovative digital solutions for the global market. They are currently expanding and developing their R&D center in Warsaw. They are a leader in AI-powered enterprise operations, delivering digital solutions and consulting services that drive value and transform businesses. They specialize in using advanced technology to streamline operations, improve efficiency, and unlock new revenue opportunities, particularly within the private capital markets. With over a decade of experience supporting high-growth companies, they bring deep domain expertise and a proven ability to turn technology into a strategic advantage. Role Overview We are seeking a skilled React FrontEnd Developer to design and develop responsive user interfaces. In this role, you will collaborate with cross-functional teams to deliver robust, user-centric solutions while driving best practices in testing, accessibility, and performance optimization. Key Responsibilities UI Development: Designing and developing responsive user interfaces using React Testing & Integration: Implementing and maintaining TDD in applications and continuous integration. Driving best practices in testing, accessibility, and performance optimization. Collaboration: Collaborating with a cross-functional team of project managers, project analysts, and sales staff to deliver high-quality, interactive products on time. Collaborating cross-functionally with design, backend, QA, and product teams to deliver robust and user-centric solutions. Requirements & Qualifications Experience & Education: 6+ years of experience in JavaScript and TypeScript development. A Bachelor's degree in Computer Science or equivalent is preferred. Core Tech Stack: Must know a modern front-end JS framework, such as React.js + Redux; Next.js is a bonus. Hands-on experience with HTML5, CSS3. Proficiency in writing cross-browser compatible code. Programming Paradigms: Should understand OO concepts and design patterns, and their application to JavaScript development. Knows functional programming paradigms. Understands asynchronous programming paradigms and best practices. Tools & Debugging: Git and branch management knowledge. Experience debugging front-end problems and a knowledge of front-end debugging tools. Familiarity with custom package creation and integration. Soft Skills & Methodology: Experience with Agile methodologies and development practices. Good communication skills and good organization skills. Ability to work under pressure and deliver against tight deadlines. What Is Offered Compensation: Monthly compensation up to $4,800 USD . Contract Type: B2B contract via Optiveum. Work Model: Hybrid (3 days working from the office located in the center of Warsaw, 2 days working from home). Stability: Long-term cooperation with a stable, international organization.

🏢 Summary: The role involves end-to-end development of custom Shopify themes and frontend solutions, delivering medium to high complexity features in eCommerce projects. The position requires strong expertise in Shopify best practices and modern frontend technologies, with ownership of the release process and technical quality. 🗂️ Requirements: 3–5 years of experience in eCommerce environments, Strong knowledge of Liquid, JavaScript, React, Tailwind CSS, GraphQL, REST, Git, Hands-on experience with Shopify (themes, APIs, apps, functions, extensions), Solid understanding of frontend and component-based architectures, Understanding of microservices architecture, Familiarity with SDLC and Agile methodologies, Experience with Jira, Confluence or similar tools, Understanding of user behavior and marketing principles in eCommerce 📃 Skills: Liquid, JavaScript, React, Tailwind, GraphQL, REST, Git, Shopify, APIs, Microservices, Agile, Jira, Confluence, eCommerce 🏢 Description: 🌍 Hello World! We are The Codest -  International Tech Software Company with tech hubs in Poland delivering global IT solutions and projects. Our core values lie in “Customers and People First” approach that prioritises the needs of our customers and a collaborative environment for our employees, enabling us to deliver exceptional products and services. Our expertise centers on web development, cloud engineering, DevOps and quality. After many years of developing our own product - Yieldbird, which was honored as a laureate of the prestigious Top25 Deloitte awards, we arrived at our mission: to help tech companies build impactful product and scale their IT teams through boosting IT delivery performance. Through our extensive experience with product development challenges, we have become experts in building digital products and scaling IT teams. But our journey does not end here - we want to continue our growth. If you’re goal-driven and looking for new opportunities, join our team! What awaits you is an enriching and collaborative environment that fosters your growth at every step. 💡 Project Description: As a Shopify Developer you will be responsible for delivering end-to-end technical execution of custom Shopify themes and frontend solutions. The ideal candidate brings several years of experience leading Shopify development projects, has a strong grasp of platform best practices, and is comfortable working with modern technologies. 📈 Your Responsibilities : Develop high-quality frontend solutions using Liquid, JavaScript, React, Tailwind, and GraphQL Bring strong experience with the Shopify platform and its best practices Work effectively both independently and within a team to maintain high standards Communicate clearly with clients, developers, and project stakeholders Pay close attention to detail, including edge cases and acceptance criteria Make informed decisions balancing code quality, timelines, and delivery Support and coordinate the release process to ensure smooth deployments Own and deliver medium to high complexity frontend features end-to-end 🔑 Key Requirements: Strong knowledge of Liquid, JavaScript, React, Tailwind CSS, GraphQL, REST, and Git Hands-on experience with Shopify development (themes, APIs, apps, functions, extensions) 3–5 years of experience in eCommerce environments Solid understanding of frontend, component-based architectures and microservices Familiarity with software development lifecycle and Agile methodologies Experience using Jira, Confluence, or similar ticketing tools Strong problem-solving skills and attention to detail Good understanding of user behavior and marketing principles in eCommerce ➕Nice to have: Ability to work independently and take ownership of tasks Confidence in making decisions with minimal supervision Experience handling complex, non-standard Shopify projects 📜Our Promise (what you can expect from us): 19-22k PLN on B2B 100% remote work 300 PLN to use on our benefits platform, Worksmile - gift cards, medical services, sports, etc. Our B2B contract contains provisions that allow you to obtain IP BOX support Integration events, education opportunities and much more… A unique opportunity to take your career to the next level - we’re looking for people who want to create an impact. You have ideas, we want to hear them! 📌Recruitment process: 30 minute screening call online with our recruiter 30 minute screen call with the team lead A technical task Offer Questions, insights? Feel free to reach out to our recruiting team: ewa.szczodrak@thecodest.co In the meantime, feel free to visit our website where you can find key facts about us.

🏢 Summary: The offer is for a senior Shopify Architect responsible for designing and implementing end-to-end technical architecture for Shopify Plus e-commerce solutions, including headless and composable approaches. The role involves building custom themes and apps, integrating external systems, and optimizing checkout and product flows. It combines architectural decision-making with hands-on development and system integrations. 🗂️ Requirements: 5+ years in e-commerce architecture or technical roles, 3+ years of experience with Shopify, Strong expertise in Shopify Plus and Liquid, Experience with headless Shopify (Hydrogen/Oxygen), Experience building custom Shopify apps, Experience with Shopify Functions and checkout extensions, Knowledge of Shopify APIs (REST, GraphQL), Proficiency in HTML, CSS, JavaScript/TypeScript, Experience with React or Next.js, Experience with ERP, OMS, or PIM integrations 📃 Skills: Shopify, ShopifyPlus, Liquid, Hydrogen, Oxygen, REST, GraphQL, HTML, CSS, JavaScript, TypeScript, React, Next.js, ERP, OMS, PIM, Webhooks 🏢 Description: Overview We are a company that focuses on AI-based solutions for business operations. We provide digital products and consulting services that help companies grow and improve. We use modern technology to make processes simpler, increase efficiency, and create new ways to earn money, especially in private capital markets. Our system includes three main parts: PaaS (Platform as a Service): our main platform that helps improve workflows, show useful data, and support growth across companies. SaaS (Software as a Service): a cloud platform that offers strong performance, smart tools, and scalable solutions. Solutions and Consulting: flexible tools and methods to help manage, grow, and improve company results. We have more than 10 years of experience working with fast-growing companies and private equity businesses. We know how to use technology to create real business value. Responsibilities and Duties Design and document full technical architecture for Shopify stores (mainly Shopify Plus), including frontend, backend, integrations, and security Use modern e-commerce approaches like headless and composable commerce Decide when to build, buy, or extend solutions in Shopify Develop and maintain custom Shopify themes using Liquid, HTML, CSS, and JavaScript/TypeScript (including React) Build or integrate custom Shopify apps and advanced features Work with Shopify Functions, webhooks, and checkout customization Improve checkout, cart, and product flows to increase sales and track data Manage integrations with systems like ERP, PIM, and payment providers Work closely with product managers, designers, and stakeholders Requirements At least 5 years of experience in e-commerce architecture or technical roles, including 3+ years with Shopify Strong knowledge of Shopify, especially Shopify Plus, Liquid, and the app ecosystem Experience with headless Shopify (Hydrogen/Oxygen) Experience building custom apps and using Shopify Functions and checkout extensions Good knowledge of Shopify APIs (REST, GraphQL) and web technologies (HTML, CSS, JavaScript/TypeScript, React/Next.js) Experience with integrations (ERP, OMS, PIM systems) Good communication skills Ability to think critically and creatively Strong problem-solving and teamwork skills Nice-to-haves Shopify certification or similar Experience moving from old systems to new platforms

🏢 Summary: Full-time B2B role for a Shopify Developer working on advanced international eCommerce projects, delivering end-to-end frontend solutions based on Shopify and modern technologies. The position focuses on building and developing custom themes and functionalities in a component-based architecture. Fully remote work with responsibility for technical decisions and high-quality code delivery. 🗂️ Requirements: 3–5 years of experience in eCommerce projects with Shopify, Strong knowledge of Liquid, Strong knowledge of JavaScript, Strong knowledge of React, Strong knowledge of Tailwind CSS, Strong knowledge of GraphQL, Strong knowledge of REST, Experience in developing Shopify themes, APIs, applications and extensions, Understanding of component-based frontend architecture, Basic knowledge of microservices, Experience working in Agile methodologies, Experience with Jira or Confluence, English level B2 or higher 📃 Skills: Shopify, Liquid, JavaScript, React, Tailwind, GraphQL, REST, Git, Jira, Confluence, Agile, Microservices 🏢 Description: Be in IT to firma rekrutacyjna, wyspecjalizowana w poszukiwaniu Specjalistów z branży technologii informatycznych. Obecnie, dla naszego klienta, poszukujemy osoby na stanowisko: Shopify Developer Zakres obowiązków: Długofalowa współpraca z międzynarodowym klientem realizującym projekty eCommerce, w środowisku opartym o nowoczesne technologie frontendowe oraz platformę Shopify . Realizacja end-to-end rozwiązań frontendowych w oparciu o Shopify, w tym tworzenie i rozwój customowych motywów oraz funkcjonalności. Tworzenie wysokiej jakości kodu przy użyciu technologii takich jak Liquid, JavaScript, React, Tailwind oraz GraphQL. Praca zarówno indywidualna, jak i zespołowa, z zachowaniem wysokich standardów jakości oraz terminowości. Ścisła współpraca z interesariuszami projektu – klientami, zespołami developerskimi oraz product ownerami. Analiza wymagań oraz dbałość o szczegóły implementacyjne, w tym edge case’y oraz kryteria akceptacyjne. Podejmowanie decyzji technicznych z uwzględnieniem kompromisów między jakością kodu a terminami delivery. Wsparcie procesu wdrożeń oraz koordynacja release’ów w celu zapewnienia stabilnych deployów. Realizacja średnio- i wysokozaawansowanych funkcjonalności frontendowych w architekturze komponentowej. Oczekujemy: Minimum 3–5 lat doświadczenia w projektach eCommerce, w szczególności z wykorzystaniem platformy Shopify. Bardzo dobrej znajomości Liquid, JavaScript, React, Tailwind CSS, GraphQL, REST oraz Git. Praktycznego doświadczenia w tworzeniu i rozwijaniu rozwiązań Shopify (motywy, API, aplikacje, rozszerzenia). Zrozumienia architektury frontendowej (component-based) oraz podstaw mikroserwisów. Doświadczenia w pracy w metodykach Agile oraz znajomości narzędzi takich jak Jira, Confluence lub podobnych. Umiejętności analitycznego myślenia oraz rozwiązywania problemów. Dbałości o szczegóły oraz jakościowego podejścia do tworzonego kodu. Zrozumienia zachowań użytkowników oraz podstaw marketingu w eCommerce. Samodzielności w działaniu oraz umiejętności podejmowania decyzji technicznych. Znajomości języka angielskiego na poziomie min. B2. Oferujemy: Wynagrodzenie w przedziale 90–110 PLN/h netto + VAT w modelu B2B (full-time) Pracę w pełni zdalną. Udział w rozwoju nowoczesnych projektów eCommerce opartych o Shopify. Możliwość pracy przy złożonych i niestandardowych wdrożeniach. Sprawny proces rekrutacyjny: rozmowa z rekruterem (30 min), rozmowa z team leaderem (30 min), zadanie techniczne, oferta.

🏢 Summary: Shopify Engineer role focused on building and scaling a multi-brand ecommerce ecosystem on Shopify. The position involves developing custom themes and apps, integrating backend systems, and optimizing performance, accessibility, and user experience. You will contribute to a growing multi-store environment with scalable architecture and reliable integrations. 🗂️ Requirements: 3+ years experience in Shopify ecosystem, Strong knowledge of Liquid and Shopify theme development, Experience with JavaScript and TypeScript, Experience with Shopify APIs (REST or GraphQL), Experience building Shopify apps with Node.js, Understanding of ecommerce flows (catalog, cart, checkout, payments), Ability to work independently and own deliverables 📃 Skills: Shopify, Liquid, JavaScript, TypeScript, Node.js, GraphQL, REST, HTML, CSS, Git, Docker, OAuth, Hydrogen, Remix, Next.js, TailwindCSS, Python 🏢 Description: Client Our client is a global entertainment company. Project overview This project centers on building a flexible multi brand ecommerce environment using the Shopify platform. The team aims to provide fast and accessible storefronts, custom app functionality, and stable backend integrations with internal business systems. The environment is expanding, and your contribution will help shape its evolution. Position overview You will work as a Shopify Engineer focused on creating reliable and scalable ecommerce experiences across several brands. You will develop custom themes, build Shopify applications, and design integrations that support a multi store ecosystem. Your work will contribute directly to improving performance, usability, and operational workflows for the product team. Technology stack Liquid, JavaScript, TypeScript, Node.js, Shopify Admin API, Shopify Storefront API, GraphQL, Git, Docker, Optional Python Responsibilities Develop and customize Shopify themes using Liquid, HTML, CSS, and JavaScript Create reusable templates and components for multi brand setups Build and maintain private or public Shopify applications Integrate with Shopify Admin and Storefront APIs and work with webhooks Implement secure authorization flows using OAuth Build backend services with Node.js for app functionality and platform integrations Support data synchronization with ERP, PIM, or CRM systems Ensure strong performance, SEO readiness, accessibility, and smooth overall UX Troubleshoot platform issues and optimize storefront speed Collaborate with designers, product managers, and QA specialists throughout delivery Requirements Experience of three years or more working in the Shopify ecosystem Strong knowledge of Liquid and Shopify theme development Practical experience with JavaScript and TypeScript Experience with Shopify APIs using REST or GraphQL Background in building Shopify apps with Node.js Understanding of ecommerce flows such as catalog, cart, checkout, promotions, and payments Ability to work independently and take ownership of deliverables Nice to have Python experience useful for data integrations or ETL tasks Headless Shopify experience using Hydrogen, Remix, or Next.js Experience with multi store or multi language setups Familiarity with TailwindCSS or other UI frameworks Experience with Shopify Plus What We Offer: Vacation days : Up to 26 business days per year. 10 illness/special days off per year (fully paid, no medical papers needed) for all contract types Health and life insurance (Luxmed) MyBenefit platform with Multisport option Internal psychological support service English language classes from the first working day Access to external learning platforms : O’Reilly, LinkedIn Learning, Udemy, and a wide catalog of diverse internal training Flexible workplace : work from the office, from home, or choose a hybrid option Tech Skills Mentoring Program Opportunities to develop as a public speaker, mentor, or technical interviewer Fully paid idle (bench) when not involved in a project Certification reimbursement (AWS, GCP, Microsoft, etc.)

🏢 Summary: Role for a Shopify Engineer to build and scale a multi-brand ecommerce ecosystem on Shopify. The position focuses on developing custom themes and apps, integrating backend systems, and optimizing performance across multiple storefronts. You will deliver scalable, reliable solutions supporting complex ecommerce operations. 🗂️ Requirements: 3+ years experience in Shopify ecosystem, Strong knowledge of Liquid and Shopify theme development, Practical experience with JavaScript and TypeScript, Experience with Shopify APIs (REST or GraphQL), Experience building Shopify apps with Node.js, Understanding of ecommerce flows (catalog, cart, checkout, payments), Ability to work independently and own deliverables 📃 Skills: Shopify, Liquid, JavaScript, TypeScript, Node.js, GraphQL, REST, HTML, CSS, OAuth, Git, Docker, APIs, ERP, PIM, CRM 🏢 Description: Client Our client is a global entertainment company. Project overview This project centers on building a flexible multi brand ecommerce environment using the Shopify platform. The team aims to provide fast and accessible storefronts, custom app functionality, and stable backend integrations with internal business systems. The environment is expanding, and your contribution will help shape its evolution. Position overview You will work as a Shopify Engineer focused on creating reliable and scalable ecommerce experiences across several brands. You will develop custom themes, build Shopify applications, and design integrations that support a multi store ecosystem. Your work will contribute directly to improving performance, usability, and operational workflows for the product team. Technology stack Liquid, JavaScript, TypeScript, Node.js, Shopify Admin API, Shopify Storefront API, GraphQL, Git, Docker, Optional Python Responsibilities Develop and customize Shopify themes using Liquid, HTML, CSS, and JavaScript Create reusable templates and components for multi brand setups Build and maintain private or public Shopify applications Integrate with Shopify Admin and Storefront APIs and work with webhooks Implement secure authorization flows using OAuth Build backend services with Node.js for app functionality and platform integrations Support data synchronization with ERP, PIM, or CRM systems Ensure strong performance, SEO readiness, accessibility, and smooth overall UX Troubleshoot platform issues and optimize storefront speed Collaborate with designers, product managers, and QA specialists throughout delivery Requirements Experience of three years or more working in the Shopify ecosystem Strong knowledge of Liquid and Shopify theme development Practical experience with JavaScript and TypeScript Experience with Shopify APIs using REST or GraphQL Background in building Shopify apps with Node.js Understanding of ecommerce flows such as catalog, cart, checkout, promotions, and payments Ability to work independently and take ownership of deliverables Nice to have Python experience useful for data integrations or ETL tasks Headless Shopify experience using Hydrogen, Remix, or Next.js Experience with multi store or multi language setups Familiarity with TailwindCSS or other UI frameworks Experience with Shopify Plus

🏢 Summary: Full Stack Senior Java Developer role focused on designing and delivering scalable web applications using Java and React.js in an Agile environment. The position involves building high-performance front-end components, developing RESTful microservices, and managing cloud-based deployments with modern DevOps practices. This is a hybrid role with long-term cooperation on high-impact, international projects. 🗂️ Requirements: Bachelor’s or Master’s degree in Computer Science, Engineering or related field, 5+ years of experience as Full Stack Developer with Java and React.js, Commercial experience with Agile methodologies, Strong experience in RESTful API and microservices development, Hands-on experience with SQL and NoSQL databases, Experience with CI/CD pipelines and containerization tools, Knowledge of authentication and authorization mechanisms 📃 Skills: Java, Spring, SpringBoot, Hibernate, JPA, React, Redux, TypeScript, JavaScript, HTML5, CSS3, MaterialUI, Bootstrap, Tailwind, REST, Microservices, OAuth2, JWT, PostgreSQL, MySQL, MongoDB, Redis, Jenkins, GitHubActions, GitLab, AWS, Azure, GCP, Docker, Kubernetes 🏢 Description: Senior Java Developer IT · Warsaw (City Center) · Hybrid About the Client Our Client is a fast-growing, international technology company that provides innovative digital solutions for the global market. They are currently expanding and developing their R&D center in Warsaw. They focus on building high-quality, scalable products using modern tech stacks and agile methodologies. With a strong emphasis on engineering excellence, they offer a collaborative environment where experts can thrive and influence the technical direction of the products. Please note: Optiveum is a recruitment agency conducting this search on behalf of our Client. Role Overview We are seeking a highly skilled Full Stack Developer with expertise in Java and React.js to join our dynamic team. The ideal candidate should have over 5 years of experience in designing, developing, and deploying scalable web applications. This role requires strong front-end and back-end development expertise, working in an Agile environment to deliver high-quality software solutions. Key Responsibilities Front-End Development: Design and develop interactive, responsive, and high-performance UI components using React.js, Redux, and modern JavaScript (ES6+). Ensure cross-browser compatibility and a seamless user experience, while optimizing front-end performance and implementing best practices in UI/UX design. Back-End Development: Develop and maintain RESTful APIs and microservices using Java (Spring Boot, Hibernate, JPA). Implement robust authentication, authorization, and data management solutions, working with relational and NoSQL databases such as PostgreSQL, MySQL, and MongoDB. System Integration & Deployment: Integrate third-party services, APIs, and cloud-based solutions. Manage deployments using CI/CD pipelines and containerization tools like Docker & Kubernetes. Code Quality & Testing: Write clean, maintainable, and efficient code following best practices. Implement unit and integration tests for both front-end and back-end components. Collaboration & Agile Development: Work closely with UI/UX designers, product managers, and DevOps engineers. Participate in Agile/Scrum ceremonies and contribute to continuous process improvements. Requirements & Qualifications Experience & Education: Bachelor's or Master's degree in Computer Science, Engineering, or a related field. 5+ years of professional experience as a Full Stack Developer with Java & React.js, alongside experience working with Agile development methodologies. Front-End Stack: Proficiency in React.js, Redux, TypeScript, HTML5, CSS3, and modern JavaScript (ES6+). Strong understanding of state management libraries and component-based architecture. Experience with UI frameworks like Material-UI, Bootstrap, or Tailwind CSS. Back-End Stack: Expertise in Java, Spring Boot, Hibernate, JPA, and RESTful API development. Experience with microservices architecture and API Gateway implementations. Knowledge of authentication mechanisms like OAuth2, JWT, and session-based authentication. Database & DevOps: Experience with SQL databases (PostgreSQL, MySQL) and NoSQL databases (MongoDB, Redis). Hands-on experience with CI/CD tools (Jenkins, GitHub Actions, GitLab CI/CD). Familiarity with cloud platforms (AWS, Azure, GCP) and containerization using Docker, Kubernetes. Soft Skills: Strong problem-solving and analytical skills. Excellent communication and teamwork abilities. Ability to manage multiple priorities in a fast-paced environment. Passion for learning new technologies and improving existing processes. What Is Offered Compensation: Monthly compensation up to $6,200 (depending on experience and interview results). Contract Type: B2B contract via Optiveum. Work Model: Hybrid (3 days working from the office located in the center of Warsaw, 2 days working from home). Stability: Long-term cooperation with a stable, international organization. Growth: Opportunity to work with the latest technologies and high-impact projects.

🏢 Summary: Full-Stack Developer role focused on building and scaling Shopify-based e-commerce solutions for global brands in a fully remote environment. The position requires senior-level Shopify expertise, strong full-stack JavaScript experience, API integrations, and business-oriented problem solving. The offer includes B2B salary, health benefits, and work on complex international e-commerce projects. 🗂️ Requirements: Senior experience with Shopify ecosystem, Experience with Liquid and Shopify APIs, Experience with custom Shopify app development, Experience with Shopify B2B and Shopify Markets, Experience with e-commerce integrations, Commercial full-stack development experience, Strong JavaScript ecosystem knowledge, Knowledge of semantic HTML and modern CSS, Experience with REST and GraphQL APIs, Ability to use AI coding tools effectively, English level B2+, Fluent Polish, Ability to diagnose technical problems independently 📃 Skills: JavaScript, TypeScript, Node.js, PHP, React, Remix, Next.js, Liquid, GraphQL, REST, Webhooks, Postman, Docker, GitHub, CI/CD, Git, Jira, ClickUp, Hydrogen, Shopify, Klaviyo, ReCharge, Yotpo, Gorgias 🏢 Description: mohi.to is a 60-person team of specialists in e-commerce, digital product design & development. On a daily basis, we help e-commerce brands, scale-ups and software houses create new digital products as well as develop existing one. In our internal satisfaction surveys, the developers appreciated a great team, from which you can learn, growth driving challenges and interesting projects for global brands, informal workplace, work comfort, professional and personal development. Our clients (Answear.com, Durex, Scholl, Mowi, Eurocash, L’Occitane, Eveline Cosmetics, Nokia – to name a few) value us for partner relations, knowledge, quality and efficient communication. We are currently looking for a Full-Stack Developer with a strong background in e-commerce and Shopify to join our team at wecanfly | Shopify Premier Partner agency WHAT WE OFFER Salary: 14,000 – 18,000 PLN net + VAT on a B2B contract 100% remote work, with optional offices in Wrocław and Rzeszów Life insurance and health care Referral bonus for recommending developers to our team Exciting and challenging projects for global brands Easy Recruitment Process - typically takes 2-3 days: Interview with CTO + code review or test assignment Interview with one of the co-founders JOB REQUIREMENTS Senior Shopify Expertise Deep experience with the Shopify ecosystem, including Liquid, Storefront & Admin APIs, complex theme architecture, and custom app development. Proven track record in configuring Shopify B2B solutions and managing multi-market setups via Shopify Markets. Strong familiarity with popular e-commerce tools, ecosystem integrations (e.g., Klaviyo, ReCharge, Yotpo, Gorgias), and connecting Shopify with external PIM/ERP systems. Strong Full-Stack background Solid commercial experience building applications across the stack, heavily focused on the JavaScript ecosystem. While moving fluently between modern frameworks, you maintain a strong appreciation for core web fundamentals, including clean, semantic HTML and modern CSS. Business-oriented mindset Deep understanding of e-commerce processes, customer journeys, and business goals. Ability to align technical decisions with key metrics (e.g., conversion rates, performance, user retention) and translate business needs into effective solutions that drive sales AI proficiency Strong, practical skillset in using AI coding assistants and AI tools to accelerate problem-solving, code refactoring, and architectural planning API Development & Integration Experience working with APIs, including fluency in REST & GraphQL development and integration Communication Excellent verbal and written communication skills in English (B2+). Fluency in Polish is required. Problem solving High independence in diagnosing technical problems and proposing scalable architectural solutions. TECHNOLOGY STACK Languages & Frameworks: JavaScript / TypeScript, Node.js or PHP, React, Remix, Next.js Shopify Ecosystem: Liquid, Shopify Admin & Storefront API, custom embedded apps, Shopify Functions, Shopify Extensions, Shopify Markets, Shopify B2B, Shopify Flow, Hydrogen API & Integrations: GraphQL, REST API, Webhooks, Postman Infrastructure & DevOps: Docker, GitHub Actions, CI/CD Tools & Architecture: Git, Jira/ClickUp, Headless Commerce Architecture