Full Stack Engineer (Java, React) - 18-month project

🏢 Summary: Senior Fullstack Engineer role focused on building scalable cloud-native applications with a 50/50 split between React/TypeScript frontend development and Node.js microservices backend development. The position includes API and UI development, automated testing, production support, and technical mentoring in a product-driven team. It is a Poland-based hybrid/remote role requiring quarterly in-person collaboration in Poland. 🗂️ Requirements: Poland residency, MSc in Computer Science or similar, 7–10 years of JavaScript/TypeScript experience, React and modern SSR framework expertise, Node.js expertise, Strong automated testing skills, Fluent English 📃 Skills: JavaScript, TypeScript, React, Node.js, Vitest, Playwright, Storybook, AWS, Lambda, S3, CloudFront, IAM, Pulumi, Microservices, SSR, Remix, Next.js 🏢 Description: We’re seeking a Senior Fullstack Engineer with a passion for building scalable, cloud-native applications using modern JavaScript technologies. In this hands-on role, you’ll collaborate with the product development team to design and implement microservices and micro frontend architectures, ensuring high performance, usability, and maintainability. This role offers a 50/50 split between frontend and backend development and is suited to someone who thrives in a fast-paced, product-driven environment, takes ownership, and enjoys mentoring teammates. Experience with React, TypeScript, and Node.js is essential to creating impactful solutions. This Poland-based role offers remote flexibility, with in-person collaboration in Poland for at least one week each quarter. Applicants must be located in Poland; this is not a globally remote role. The contract form is Umowa o Pracę (brutto). Quick Facts • 50/50 frontend and backend development split • Remote flexibility within Poland, with quarterly in-person team meetings in Poland • Umowa o Pracę (brutto) contract What you will be responsible for • Collaborate in refinement sessions with product and tech teams to ensure feature clarity and feasibility. • Design, implement, and maintain scalable web APIs using Node.js and microservices architecture principles. • Develop responsive, high-quality user interfaces with React and TypeScript. • Work closely with Product Owners to clarify feature requirements and ensure business context is well understood. • Align feature architecture with Tech Leads to ensure consistency and scalability. • Ensure features meet the Definition of Done with robust unit, integration, and E2E test coverage. • Support incident response and production issue resolution. • Mentor teammates and contribute to knowledge sharing in technical best practices. Essential Qualifications • MSc in Computer Science or similar • 7–10 years of professional experience in JavaScript/TypeScript • Expertise in React with a modern SSR framework: React Router v7, Remix, or Next.js • Node.js backend expertise • Strong testing skills with Vitest, Playwright, and Storybook interaction/component-driven tests Bonus Skills • Familiarity with AWS, including Lambda, S3, CloudFront, IAM, and Pulumi/infrastructure as code • Agile and DDD experience in cross-functional teams Collaboration and Interpersonal Skills • Clear communication with technical and non-technical stakeholders • Ownership mindset and proactive problem-solving • Fluent English required; German, Polish, and Ukrainian are nice to have What you can expect • A dynamic, ambitious team where your voice is heard and contributions matter • Ownership over decisions in a trusted, cross-functional environment • Fair compensation, flexible working hours, and a hybrid work setup • Support for personal and professional growth and a healthy work-life balance Employer of Record Employment is offered through an Employer of Record to ensure legal compliance and a seamless experience for team members in Poland. ID Verification Candidates may be asked to verify their identity via PEScheck before speaking with recruiters to support a fair and secure hiring process.

🏢 Summary: Senior Full-Stack Engineer role focused on building scalable ASP.NET/C# microservices and React/TypeScript interfaces, with a 60/40 frontend-to-backend split. The position offers technical ownership, mentoring opportunities, and a potential path to Tech Lead while working hybrid from Poland under an employment contract. 🗂️ Requirements: Poland residency, MSc in Computer Science or equivalent, 5+ years building secure REST APIs with ASP.NET, 5+ years developing frontend applications with React, Microservices architecture expertise, Cloud design-pattern knowledge, Technical ownership, Technical leadership, English B2 fluency 📃 Skills: ASP.NET, C#, React, TypeScript, REST, Microservices, Cloud, AWS, Agile, DDD 🏢 Description: We’re looking for a Senior Full-Stack Engineer who brings deep technical expertise and a collaborative mindset to our product development team. You will work with a modern microservices architecture, building scalable backend services using the ASP.NET Web API with C#, and intuitive frontend interfaces using mainly React and TypeScript. This is a hands-on engineering role with a 60/40 front-/backend focus, ideal for someone who likes to take ownership, thrives in a dynamic product team, and enjoys mentoring others. This role could easily become a Tech Lead role in a foreseeable future. If you're passionate about designing high-impact software in a cloud-native environment, we’d love to hear from you. This Poland-based role offers remote flexibility, but we value in-person collaboration. Our team meets in Poland for at least one week each quarter, so we request all applicants to be located in Poland. This is not a globally remote role. Poland residency is required. The contract form is Umowa o Pracę (only, no B2B). What you will be responsible for Collaborate proactively in refinement sessions with product and tech teams to ensure clarity and feasibility of features. Design, implement, and maintain scalable web APIs using ASP.NET and microservices architecture principles. Develop responsive user interfaces with React and TypeScript that enhance usability and performance. Work closely with Product Owners to clarify feature requirements and ensure business context is well-understood. Define, design and align feature architecture with the Head of Engineering to ensure consistency and scalability. Ensure features meet Definition of Done, with state-of-the-art unit, integration, and end-to-end test coverage. Support incident response and production issue resolution as per team standards. Actively contribute to team knowledge sharing and coach colleagues in technical best practices. What makes you a match Essential Qualifications: MSc+ in Computer Science or equivalent 5 years of proven experience in building secure REST APIs using ASP.NET , as well as developing solid front-end applications with React are non-negotiable must haves. Comprehensive knowledge of contemporary web application architectures, with a focus on microservices and cloud design patterns. Demonstrated ability of high technical Ownership and Tech Leadership are a requirement for this role. Bonus Skills: Hands-on experience with AWS infrastructure. Experience working in cross-functional product teams using Agile practices and following Domain-Driven Design (DDD). Collaboration and Interpersonal Skills: Clear and adaptive communication with both technical and non-technical stakeholders. Strong sense of ownership, accountability, and proactive problem-solving. Languages: English: B2 - (No certificate required, but Fluency) Polish and German: desired, not required What you can expect A dynamic, ambitious team where your voice is heard, and your contributions truly matter. You’ll have real ownership over your decisions in a trusted, cross-functional environment within a Swiss product company that puts people first. We offer fair compensation, flexible working hours, a hybrid work setup, and a culture that supports both personal and professional growth, fostering a healthy work-life balance. Employer of Record: For this role, we offer employment through our trusted Employer of Record provider Remote.com , ensuring full legal compliance and a seamless experience for our team members in Poland. ID Verification: To maintain a fair and secure hiring process, candidates may be asked to verify their identity their identity before speaking with our Recruiter. This step helps us prevent fraud and focus our resources on genuine applicants. About us Who we are esurance is a Swiss InsurTech offering a SaaS platform that connects SMEs, insurance providers, brokers, and business application providers. Founded in 2013, we're on a mission to make health insurance for small businesses truly hassle-free. What makes us unique You'll be part of a connected, forward-thinking team built on trust, openness, and mutual respect — working hybrid from Zürich or remotely across Europe. We invest in your growth through agile practices, real ownership, and a transparent Grading System that ensures fair pay and clear career paths. Our core values We are connected. We are ahead. We are clear. We are approachable. Do these resonate with you? → Come join us. Our Recruitment Process & Principles We keep our process transparent and respect your time: Application Review — You hear from us within 5 business days. Always. Recruiter Screen — A relaxed Get2Know call to explore mutual fit. Four Interviews — Two Role Knowledge interviews (peer + supervisor), one Culture Match, one Leadership conversation. Batched into two days wherever possible. Hiring Decision — Thoughtful, timely. You'll know within 1–2 weeks. Use of Artificial Intelligence (AI) We use AI to increase productivity and you're welcome to use it to polish your CV or Coverletter. Interviews and assessments should reflect your genuine self, though. Recruiting Agencies: We don't work with unsolicited agency submissions. Thanks for respecting this.

🏢 Summary: Long-term, fully remote Senior Fullstack Engineer role building a cloud-native IoT platform for building automation and energy management. The work spans React.js applications, JVM microservices, REST APIs, cloud architecture, automated quality practices, and AI-assisted development. 🗂️ Requirements: 5+ years of commercial full-stack experience, Strong product mindset and ownership of delivered features, Java or Kotlin expertise, Spring Boot and JVM ecosystem knowledge, Microservices architecture and REST API design experience, React.js and modern JavaScript/TypeScript experience, Cloud-native architecture knowledge, Docker containerization experience, Practical Kubernetes knowledge, Daily use of AI-assisted development tools with critical code review skills, Fluent English at C1 level 📃 Skills: Java, Kotlin, Spring, React, JavaScript, TypeScript, Docker, Kubernetes, Copilot, ChatGPT 🏢 Description: About the Project We are seeking an experienced Senior Fullstack Engineer on behalf of our client—a European leader in building automation, energy management, and BMS/EMS/IoT solutions. The project focuses on building and evolving a modern, scalable, next-generation cloud-native platform (Cloud-native / IoT), bringing together a high-performance microservices backend and modern user-facing applications. Work Mode: 100% Remote Start Date: ASAP Duration: long-term Job responsibilities: Building and scaling complete solutions from React.js frontends to robust JVM-based microservices on the backend. Participating in technical discussions, designing REST APIs, and contributing to overall platform modernisations and cloud architecture. Collaborating directly with Product Owners to understand business goals, challenge assumptions constructively, and suggest improvements. Writing clean code, implementing automated testing, conducting code reviews, and maintaining comprehensive technical documentation. Regularly leveraging AI tools (e.g., GitHub Copilot) in daily workflows to boost development speed, generate documentation, and improve productivity. Expectations: 5+ years of commercial Full-stack experience with a strong Product Mindset and proven ownership of delivered features. Strong knowledge of Java and/or Kotlin (JVM ecosystem, Spring Boot), microservices architecture, and REST API design. Hands-on experience with React.js and the modern JavaScript/TypeScript ecosystem. Solid understanding of Cloud-native architectures, containerization (Docker), and practical knowledge of Kubernetes (K8s). Daily active use of AI-assisted tools (Copilot, ChatGPT, etc.) paired with critical code review skills. Fluent English (C1 level) for seamless collaboration in an international environment. (Nice to Have): Experience with SaaS platforms or event-driven architecture, prior domain exposure to IoT, BMS, HVAC, SCADA, or industrial automation, and working knowledge of German. We offer Ongoing support from a dedicated agent , taking care of your project continuity, client contact, necessary formalities, work comfort and development Consultant Development Program – advice on growth planning based on the latest trends and market needs in IT, including consultations with agents and growth mentors Access to 7N Learning & Development – a development and educational platform with webinars, a library of articles and industry reports, and regular invitations to one-time and recurring development events – technical, business, and lifestyle Spectacular integration events , both for you (e.g., annual Kick-Off trip , Christmas parties, or Summer Olympics sports events) and for your loved ones (e.g., family picnics, movie premieres) Professional development not only during the project – you can get involved in knowledge transfer to others within the 7N Services offering directed at 7N clients Relationships and access to the knowledge of the most experienced IT experts in the market – the average professional tenure of our consultants in Poland is over 10 years A complete benefits package , including funding for medical care, life insurance, sports cards for you and your loved ones, as well as discounts in stores in Poland and abroad About 7N Constantly searching for projects, difficult rate negotiations, lack of development support – sounds familiar? At 7N, you gain not only stability of contracts but also the personal involvement of a dedicated agent who ensures your professional comfort and continuous access to development initiatives. Our mission is to provide stable and rewarding collaborations that drive your success as an IT expert and the success of our clients. We build long-lasting relationships based on Scandinavian values and 30 years of experience creating IT solutions for over 200 organizations.

🏢 Summary: Full-Stack Software Engineer role building a high-scale e-commerce PPC platform with React microfrontends and Kotlin/Spring Boot services. The work spans real-time analytics dashboards, ML-driven recommendations, and event-driven campaign-data processing, with strong automated testing and DevOps practices. 🗂️ Requirements: Proven React expertise, TypeScript proficiency, CSS and HTML proficiency, State-management experience, Modern testing-framework experience, Hands-on Kotlin and Spring Boot experience, REST API and microservices experience, Commercial MongoDB and SQL experience, Cloud-environment experience, Familiarity with agentic coding assistants, English proficiency at B2 or higher 📃 Skills: React, TypeScript, CSS, HTML, Jest, Vitest, Playwright, Kotlin, SpringBoot, REST, MongoDB, SQL, GCP, GitHubCopilot, OpenCode 🏢 Description: We're looking for Full-Stack Software Engineer (React & Kotlin). Join a high-scale, PPC advertising platform in the e-commerce sector, built entirely on microservices handling thousands of requests per second. You will work on ML-driven recommendation engines, high-volume event data pipelines, and real-time merchant analytics dashboards. Our expectations Frontend Focus: Strong, proven expertise in React, TypeScript, CSS/HTML , state management, and modern testing frameworks (Jest / Vitest / Playwright). Backend Proficiency: Solid hands-on experience in Kotlin with Spring Boot, REST APIs, and microservices architecture. Commercial experience working with MongoDB, SQL databases, and cloud environments (GCP preferred). Familiarity with agentic coding tools and assistants (e.g., GitHub Copilot, OpenCode). Proactive, relational, highly engaged, open-minded, and strong communication skills. Fluent in English (B2+). Welcome Skills Experience with Microfrontends, Server-Side Rendering (SSR), and Accessibility standards (a11y / WCAG). Exposure to Scala, Big Data engines (Apache Spark), or search technologies (ElasticSearch). Prior background in AdTech, PPC advertising, or large-scale e-commerce systems. Key tasks Design, build, and maintain scalable React-based microfrontends for analytics dashboards and merchant tools with a focus on Accessibility (a11y) and Server-Side Rendering (SSR). Build high-performance backend microservices in Kotlin and Spring Boot to power real-time dashboards, benchmarks, and recommendation engines. Partner closely with Data Science teams to serve personalized recommendations and automated campaign insights. Participate in developing a distributed, event-driven cloud architecture for processing campaign data in real time. Maintain high engineering standards through automated testing (unit, integration, E2E via Jest/Vitest/Playwright), code reviews, CI/CD, and DevOps practices.

🏢 Summary: Full-time, fixed-term B2B contract for a Mid Fullstack Engineer to build and maintain a complex project and resource management web platform. The role covers scalable TypeScript development across React/Next.js frontend and Node.js/Express/PostgreSQL backend, including business workflows, permissions, dashboards, and data aggregation. Offers 100% remote work, flexible hours, and 85–120 PLN/h net + VAT. 🗂️ Requirements: 3+ years of commercial Fullstack Engineer experience, Commercial TypeScript experience across frontend and backend, React experience, Node.js and Express backend experience, PostgreSQL and relational database design experience, Modern web application experience with complex business logic, REST APIs, application architecture, and state management knowledge, Use of AI-powered coding assistants in daily workflow, Independent and cross-functional teamwork, Problem-solving and code-quality focus, Polish C1, English B2 📃 Skills: TypeScript, React, Next.js, Node.js, Express, PostgreSQL, REST, GitHub, Copilot, Cursor, ChatGPT, Claude 🏢 Description: The role We're looking for a Mid Fullstack Engineer with commercial experience building modern web applications using TypeScript and React . You'll join a product team developing a complex web platform that supports project and resource management, capacity planning, reporting, and collaboration across multiple user roles. The platform includes sophisticated business processes, role-based permissions, interconnected modules, and dashboards powered by aggregated data. You'll contribute to both frontend and backend development, building scalable features while collaborating closely with product managers, designers, and other engineers. This is a full-time (1 FTE), fixed-term contract from August/September 2026 until January/February 2026, dedicated to this product development project. What you'll do Develop and maintain full-stack features using TypeScript across both frontend and backend. Build user interfaces with React/Next.js and implement backend services using Node.js, Express, and PostgreSQL. Design and implement business logic related to project planning, resource management, capacity planning, and workflow automation. Develop and evolve data models, authorization mechanisms, and data aggregation logic. Build rich operational interfaces, including dashboards, tables, forms, filters, and user workflows tailored to different user roles. Collaborate with project managers, designers, and engineers to translate business requirements into scalable, high-quality solutions. Write clean, maintainable, and well-tested code while participating in code reviews. Contribute to architectural discussions and continuously improve the quality, performance, and maintainability of the platform. What we're looking for 3+ years of commercial experience as a Fullstack Engineer. Strong commercial experience with TypeScript across both frontend and backend development. Hands-on experience with React (Next.js is a plus). Commercial experience building backend applications with Node.js and Express. Experience working with PostgreSQL and relational database design. Comfortable using AI-powered coding assistants (e.g. GitHub Copilot, Cursor, ChatGPT, Claude) as part of the daily development workflow. Experience building and maintaining modern web applications with complex business logic. Good understanding of REST APIs, application architecture, and state management. Ability to work independently while collaborating effectively within a cross-functional team. Strong problem-solving skills and attention to code quality. Comfortable working in a bilingual environment (Polish C1, English B2). Nice to have Experience with Python and FastAPI. Experience designing permission models or role-based access control. Familiarity with automated testing and CI/CD pipelines. Experience working on SaaS or B2B products. What we offer 85-120 PLN/h netto + VAT, B2B 100% remote setup and flexible hours Interesting, meaningful projects – we only take on the ones we truly believe in :-)