Senior Fullstack Engineer / Tooling Architect

🏢 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: 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 our 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 , making it ideal for someone who thrives in a fast-paced, product-driven environment , takes ownership, and enjoys mentoring teammates. If you’re experienced in and excited about leveraging React, TypeScript, and Node.js to create impactful solutions, 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 (brutto). 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 test coverage (unit, integration, E2E). Support incident response and production issue resolution. Mentor teammates and contribute to knowledge sharing in technical best practices. What makes you a match > Essential Qualifications (Must-Have's): MSc Computer Science or similar 7 - 10 years of professional experience in JavaScript/TypeScript Expertise in React + a modern SSR framework (React Router v7 / Remix / Next.js) (frontend) and Node.js (backend) Strong testing skills ( Vitest, Playwright, and Storybook interaction tests/component-driven ). > Bonus Skills: Familiarity with AWS (Lambda, S3, CloudFront, IAM, Pulumi / infrastructure-as-code). Agile/DDD experience in cross-functional teams. > Collaboration and Interpersonal Skills Clear communication with technical/non-technical stakeholders. Ownership mindset with proactive problem-solving. Languages: Fluent English (required); German, Polish, Ukrainian (all nice-to-have). 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 ( 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 might be asked to verify their identity via PEScheck before speaking with our recruiters. This step helps us prevent fraud and focus our resources on genuine applicants. 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. Interview Round — 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: Senior Full Stack Engineer role focused on leading the delivery of scalable, business-critical web applications. The position combines React/Remix front-end development with Python REST APIs, Azure cloud deployment, automated testing, and DevSecOps practices while providing technical leadership in an Agile team. 🗂️ Requirements: Senior full-stack engineering experience, TypeScript, React, Python, RESTful API development, MongoDB, SQL databases, Microsoft Azure, Azure Kubernetes Service, Clean, testable code, Test-driven development, Vitest, Pytest, DevSecOps practices, GitHub workflows, GitHub Actions CI/CD, Kubernetes, ArgoCD, Problem-solving, Technical communication, Bachelor’s degree or equivalent professional experience 📃 Skills: TypeScript, React, Remix, Python, MongoDB, SQL, Azure, AKS, Vitest, Pytest, GitHub, GitHubActions, Kubernetes, ArgoCD, DevSecOps, TDD, GitOps, ES6 🏢 Description: We are seeking an experienced Senior Full Stack Engineer to join a high-performing engineering team responsible for building and enhancing innovative web-based platforms. This role offers the opportunity to work on complex, business-critical applications while driving technical excellence, engineering best practices, and scalable software solutions. As a Senior Engineer, you will take ownership of advanced development initiatives, contribute to architectural decisions, and help shape the future direction of modern web applications. You will work across both front-end and back-end technologies , combining expertise in React-based user interfaces and Python API development to deliver secure, scalable, and maintainable solutions. The ideal candidate will have strong full-stack engineering experience, a passion for clean code and automation, and the ability to solve complex technical challenges within a collaborative, agile environment. Key Responsibilities Lead the design, development, and delivery of complex software engineering initiatives from concept through to production. Architect and build scalable Python RESTful APIs and modern React/Remix-based web applications using service-oriented architecture principles. Develop reusable components, integrations, and technical solutions that improve application scalability and maintainability. Investigate, troubleshoot, and resolve complex technical issues, providing effective solutions and long-term improvements. Establish and promote engineering best practices across development, testing, security, and deployment processes. Champion a DevOps-first mindset , supporting automation, continuous delivery, and operational excellence. Define and address non-functional requirements including performance, accessibility, reliability, and security. Collaborate closely with Product Owners, architects, engineers, and business stakeholders to translate requirements into innovative technical solutions. Provide technical guidance and mentorship to other engineers, encouraging knowledge sharing and continuous improvement. Contribute to Agile delivery practices, supporting effective planning, estimation, and iterative development. Essential Skills & Experience Proven experience as a Senior Full Stack Engineer or similar technical leadership role, delivering complex software solutions. Strong proficiency in TypeScript , including modern ES6+ features and best practices. Extensive experience building dynamic, responsive front-end applications using React , with experience in Remix or similar frameworks preferred. Strong backend development experience using Python , including the design and implementation of RESTful APIs. Solid understanding of database technologies, including MongoDB and relational SQL databases. Hands-on experience with Microsoft Azure , particularly Azure Kubernetes Service (AKS) and cloud-native application deployment. Strong commitment to writing clean, maintainable, and highly testable code. Experience with Test Driven Development (TDD) and automated testing frameworks, including: Unit testing with Vitest and Pytest Functional testing exposure with Playwright is desirable. Strong understanding of modern DevSecOps practices , including: GitHub version control workflows CI/CD automation using GitHub Actions Containerised application deployment using Kubernetes GitOps practices with ArgoCD Excellent problem-solving skills with strong attention to technical detail and quality. Strong communication skills with the ability to collaborate effectively with both technical and non-technical stakeholders. Bachelor’s degree in Computer Science, Engineering, or a related discipline, or equivalent professional experience. Desirable Skills Azure Developer certification, particularly AZ-204 . Experience working with Databricks or modern data platforms. Experience working in Scrum-based Agile environments . Previous experience working with large-scale enterprise applications and distributed systems.

🏢 Summary: Senior Full-Stack Developer role supporting a financial-services modernization project that migrates legacy regulatory-reporting applications to Azure. The position focuses on .NET 9 backend services, React microfrontends, Azure infrastructure, CI/CD, security, and production support in a hybrid Krakow-based model. 🗂️ Requirements: 5+ years of full-stack C#/.NET and ASP.NET Core experience, EF Core and MSSQL/Azure SQL expertise, Hands-on Azure services experience, Terraform Infrastructure as Code experience, Azure DevOps YAML pipelines and release management experience, REST API security with OAuth/JWT and Azure AD integration, Automated testing experience, Application Insights and OpenTelemetry knowledge, Strong Git and peer code review practices, English proficiency at B2+ level, Existing legal right to work in the European Union 📃 Skills: C#, .NET, ASP.NET, EF, MSSQL, AzureSQL, Terraform, AzureDevOps, OAuth, JWT, AzureAD, xUnit, Jest, Vitest, Playwright, ApplicationInsights, OpenTelemetry, Git, React, TypeScript, Docker, Kubernetes, Bicep, ARM, ServiceBus, EventHubs, Databricks, Spark, PowerBI 🏢 Description: Unleash innovation at the forefront of cloud-native application development—transform legacy systems into scalable, modern solutions! Krakow-based opportunity with hybrid work model. As a Senior Full-Stack Developer , you will be working for our client, an esteemed financial services organization, on the Hilda 2.0 modernization project. You will play a critical role in migrating legacy applications to a cutting-edge Azure architecture, supporting internal regulatory reporting in Israel. This role offers a unique chance to lead complex technical transformations, driving innovation and efficiency in a highly regulated environment. Your main responsibilities: Design and develop backend services and REST APIs in .NET 9 using Clean Architecture principles. Build and maintain React + TypeScript microfrontends integrated via module federation. Evolve MSSQL / Azure SQL schemas, optimize queries, and implement stored procedures. Author Infrastructure as Code in Terraform to provision Azure resources across environments. Develop, optimize, and support CI/CD pipelines within Azure DevOps, including automation and deployments. Integrate Azure AD (Entra ID) authentication, apply security best practices, and manage secrets via Key Vault. Instrument services for observability, including Application Insights and structured logging. Troubleshoot production issues, implement fixes, and support continuous deployment cycles. Collaborate in Agile teams to plan, review, and refine work processes. You're ideal for this role if you have: 5+ years of experience in full-stack development with C# / .NET (.NET 6+/9) and ASP.NET Core. Strong hands-on expertise with EF Core and MSSQL / Azure SQL (query tuning, stored procedures). Practical experience with Azure services such as App Service, Azure SQL, Storage, Key Vault, and Functions. In-depth knowledge of Infrastructure as Code using Terraform (modules, multi-environment). Proven experience with Azure DevOps pipelines (YAML, release management). Skilled in building and securing REST APIs with OAuth / JWT authentication, including Azure AD integration. Experience in automated testing frameworks (xUnit, Jest/Vitest, Playwright). Good understanding of observability tools like Application Insights and OpenTelemetry. Strong Git practices and peer code review discipline. Excellent command of English for technical communication (B2+). It is a strong plus if you have: (optional) Production experience with React and TypeScript. Familiarity with Data & Reporting stacks: Azure Data Factory, Databricks/Spark, Power BI. Experience with microfrontends and module federation techniques. Knowledge of Docker and Kubernetes (AKS). Bicep or ARM templates alongside Terraform. Event-driven architectures (Service Bus, Event Hubs). Experience modernizing legacy UI and services (ASP.NET MVC/Razor, WPF, WinForms). Azure certifications (AZ-204, AZ-400, AZ-104) or HashiCorp Terraform Associate. Language Required for the role: Communicative English (fluent command required). Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.