Senior Fullstack Engineer

🏢 Summary: Remote Full Stack .NET Developer role focused on building, maintaining, and supporting enterprise-grade insurance applications across front-end, back-end, database, and mobile layers. The position includes production support and an every-other-week on-call rotation until 22:00 CEST. 🗂️ Requirements: Bachelor’s degree in Computer Science, Information Technology, or related field, 3+ years of professional .NET (C#) development experience, 3+ years of front-end development experience, JavaScript, HTML5, CSS3, and React or Angular proficiency, SQL and database development experience, Mobile application development, maintenance, and support experience, Availability for every-other-week on-call rotation until 22:00 CEST, English communication skills 📃 Skills: .NET, C#, JavaScript, HTML5, CSS3, React, Angular, SQL, Mobile 🏢 Description: About ClearLync ClearLync provides consulting services and software solutions to insurance companies throughout the United States while also developing innovative proprietary applications. We are seeking an ambitious and talented Full Stack .NET Developer with strong front and back-end expertise to join our growing team. This role is ideal for a developer who enjoys working across the full technology stack, designing, developing, and supporting enterprise-grade applications. The successful candidate will contribute to both customer-facing solutions and internally developed software products. On-Call Support Requirement: This position includes participation in an on-call rotation every other week until 22:00 CEST to support production environments. During assigned on-call periods, candidates must be available to respond to management communications and assist with resolving critical production issues when necessary. Qualifications Bachelor's degree in Computer Science, Information Technology, or a related field. 3+ years of professional experience developing applications using .NET (C#). 3+ years of front-end development experience with strong knowledge of: JavaScript HTML5 CSS3 React and/or Angular Strong SQL and database development experience. Experience developing, maintaining, and supporting mobile applications. Strong analytical and problem-solving skills. Demonstrated ownership, accountability, and commitment to delivering high-quality solutions. Excellent verbal and written English communication skills. Key Responsibilities Design, develop, test, and deploy new applications and features. Maintain, enhance, and support existing applications and services. Collaborate with cross-functional teams to gather requirements and deliver business solutions. Participate in application architecture, technical design, and code reviews. Troubleshoot and resolve application issues across front-end, back-end, and database layers. Support production environments and participate in the on-call rotation. Contribute to continuous improvement initiatives, including performance optimization and process enhancements. What Makes You a Great Fit You are dependable, self-motivated, and capable of working independently in a remote environment. You enjoy learning new technologies and expanding your technical expertise. You have a strong understanding of database design, architecture, and best practices. You communicate effectively with both technical and non-technical stakeholders. You demonstrate a commitment to continuous professional growth and development. You take pride in delivering reliable, high-quality software and supporting the applications you build. What We Offer Fully remote work environment. Competitive compensation based on experience and qualifications. B2B contract opportunities. Semi-flexible working hours. Collaborative, team-oriented culture with a flat organizational structure. Opportunities to work on innovative products and enterprise-scale insurance technology solutions. Exposure to a variety of technologies, projects, and industry-leading clients. Join ClearLync and help build innovative software solutions that power the future of the insurance industry.

🏢 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: Middle/Senior Full Stack Developer role focused on customer-growth features for a large-scale international platform, including onboarding, subscriptions, pricing, trials, and payments. The position emphasizes Node.js back-end development, React front-end work, cloud scalability, and cross-functional product delivery. 🗂️ Requirements: 4+ years of commercial software development experience, Strong Node.js and TypeScript back-end experience, Good React and TypeScript front-end skills, Product-oriented development experience, Cloud infrastructure and DevOps knowledge, AWS experience: EC2, ECS, RDS, S3, MySQL and Redis experience, CI/CD and infrastructure automation familiarity, Scalable system design and engineering best-practice knowledge, Upper-Intermediate English or higher 📃 Skills: Node.js, TypeScript, React, AWS, EC2, ECS, RDS, S3, MySQL, Redis, CI/CD, DevOps 🏢 Description: Join a product-focused engineering team working on customer growth initiatives that directly influence business scalability and user experience. You will contribute to the evolution of onboarding, subscription plans, pricing strategies, and payment experiences for a large-scale international platform. We are looking for a Middle/Senior Full Stack Developer with strong Back-end expertise in Node.js and solid Front-end skills in React. You will collaborate closely with Product Managers, Designers, QA Engineers, and other developers in a highly collaborative environment focused on innovation and continuous improvement. We at Sigma Software value engineering excellence, ownership, and knowledge sharing. This is an opportunity to work with modern cloud technologies, influence product decisions, and contribute to impactful solutions used by customers worldwide. Customer Our Customer is a product-focused international company developing a large-scale digital platform with a strong emphasis on customer growth and user experience optimization. The organization continuously improves pricing models, onboarding journeys, payment flows, and trial experiences to increase customer engagement and business scalability. The engineering culture promotes innovation, ownership, and close collaboration across product, design, and engineering teams. Project The project focuses on building and improving customer-facing product experiences related to onboarding, subscription management, pricing strategy, trial conversion, and payment flows. The team works in a modern cloud-based environment with high engineering standards and a strong product mindset. You will participate in feature delivery, scalability improvements, architecture discussions, and engineering initiatives aimed at increasing development efficiency and enhancing customer experience. Requirements 4+ years of commercial software development experience Strong Back-end development experience with Node.js and TypeScript Good Front-end development skills with React and TypeScript Experience working in product-oriented environments Knowledge of cloud infrastructure and DevOps practices Experience with AWS services such as EC2, ECS, RDS, and S3 Experience with relational databases and caching solutions including MySQL and Redis Familiarity with CI/CD tools and infrastructure automation practices Understanding of software engineering best practices and scalable system design Strong communication and collaboration skills Upper-Intermediate or higher English level Will be a plus Experience with Terraform, Ansible, SonarQube, GitLab CI/CD, and ELK stack Experience working with subscription-based or SaaS products Knowledge of experimentation platforms, pricing systems, or payment integrations Experience contributing to product growth initiatives and customer journey optimization Personal Profile Proactive and collaborative team player Product-minded engineer with strong ownership mentality Passionate about learning and continuous improvement Comfortable working in cross-functional international teams Open to innovation and process improvements Responsibilities Design, develop, and maintain scalable Full Stack solutions using Node.js, TypeScript, and React Collaborate closely with Product Managers, Designers, QA Engineers, and developers to deliver high-quality product features Contribute to onboarding, payment, trial, and pricing experience improvements Participate in technical discussions, architectural decisions, and solution design activities Improve system reliability, scalability, and performance within a cloud-based infrastructure Write clean, maintainable, and well-tested code following engineering best practices Participate in code reviews and knowledge-sharing initiatives Contribute to CI/CD improvements and engineering process optimization Support cross-team initiatives focused on developer experience and operational efficiency