Fullstack Software Engineer (React & Next.js / .NET)

🏢 Summary: Oferta dla Full Stack Software Engineera obejmuje rozwój i utrzymanie skalowalnej platformy e-commerce B2B opartej na mikroserwisach. Rola łączy tworzenie responsywnych interfejsów oraz wysokowydajnych usług backendowych, z naciskiem na niezawodność, obserwowalność i efektywność kosztową chmury. 🗂️ Requirements: Minimum 5 lat doświadczenia jako Full Stack Software Engineer lub Software Engineer, Komercyjne doświadczenie z Java 11+ i Spring Boot oraz/lub TypeScript i React, Znajomość REST API i integracji frontend–backend, Doświadczenie z PostgreSQL, Znajomość GitLab, Jira, SonarQube, Kubernetes, Grafana, CI/CD i mikroserwisów, Doświadczenie w testach automatycznych: unit, integration, end-to-end, Doświadczenie z komunikacją asynchroniczną i systemami rozproszonymi, Znajomość architektury oprogramowania i wzorców projektowych, Angielski na poziomie minimum B2 📃 Skills: Java, Spring, TypeScript, React, REST, PostgreSQL, GitLab, Jira, SonarQube, Kubernetes, Grafana, CI/CD, Mikroserwisy, AWS, Azure, GCP, Kafka, Elasticsearch, Solr 🏢 Description: Dołącz do zespołu rozwijającego jedną z największych platform e-commerce B2B w Europie, obsługującą miliony produktów i klientów biznesowych w ponad 20 krajach. Jako Full Stack Software Engineer będziesz projektować, rozwijać i utrzymywać nowoczesne rozwiązania backendowe i frontendowe wspierające kluczowe procesy sprzedażowe. Wspólnie będziemy tworzyć skalowalną platformę opartą o mikroserwisy i nowoczesne technologie, stanowiącą fundament międzynarodowego rozwoju firmy. Stanowisko Fullstack Software Engineer Zakres obowiązków Projektowanie, rozwój i utrzymanie rozwiązań Full Stack obejmujących zarówno backend, jak i frontend. Tworzenie nowoczesnych, responsywnych i intuicyjnych interfejsów użytkownika. Rozwój oraz utrzymanie wysokowydajnych usług backendowych wspierających kluczowe procesy biznesowe. Zapewnianie wysokiej wydajności, skalowalności i dostępności systemów. Monitorowanie aplikacji i usług, wdrażanie mechanizmów alertowania oraz proaktywne rozwiązywanie problemów. Projektowanie skalowalnej architektury opartej na mikroserwisach oraz dbanie o bezpieczeństwo, niezawodność i jakość dostarczanych rozwiązań. Współpraca w interdyscyplinarnych, autonomicznych zespołach produktowych. Odpowiedzialność za rozwój rozwiązań w całym ich cyklu życia. Optymalizacja infrastruktury i wykorzystania zasobów chmurowych przy zachowaniu efektywności kosztowej. Wymagania Minimum 5 lat doświadczenia zawodowego na stanowisku Full Stack Software Engineer lub Software Engineer. Bardzo dobra znajomość Java 11+ i Spring Boot oraz/lub TypeScript i React poparta doświadczeniem komercyjnym. Dobra znajomość REST API oraz integracji frontend-backend. Doświadczenie w pracy z bazami danych, w szczególności PostgreSQL. Znajomość nowoczesnych narzędzi i praktyk wytwarzania oprogramowania, takich jak GitLab, Jira, SonarQube, Kubernetes, Grafana, CI/CD oraz architektura mikroserwisowa. Doświadczenie w tworzeniu testów automatycznych (unit, integration, end-to-end). Doświadczenie w pracy z komunikacją asynchroniczną oraz systemami rozproszonymi. Znajomość zagadnień związanych z architekturą oprogramowania i wzorcami projektowymi. Umiejętność prowadzenia merytorycznych dyskusji technicznych i efektywnej współpracy zespołowej. Znajomość języka angielskiego na poziomie minimum B2. Mile widziane Doświadczenie w pracy z platformami event streamingowymi (np. Kafka). Znajomość technologii wyszukiwania, takich jak Elasticsearch lub Solr. Doświadczenie w pracy z platformami chmurowymi (AWS, Azure lub GCP). Co oferujemy Pracę hybrydową w biurze (biuro w Warszawie przy stacji metra Młociny). Zatrudnienie w oparciu o umowę o pracę. Możliwość rozwoju zawodowego w strukturach wewnętrznych. Możliwość skorzystania z benefitów pozapłacowych na preferencyjnych warunkach. Zniżkę pracowniczą na części samochodowe grupy Inter Cars. Szkolenia wewnętrzne i zewnętrzne rozwijające kompetencje miękkie i techniczne. Dofinansowane do zajęć z języka angielskiego.

🏢 Summary: Oferta dla doświadczonego Full Stack Software Engineera, który będzie rozwijać skalowalną platformę e-commerce B2B w architekturze mikroserwisowej. Rola obejmuje tworzenie backendu i frontendu, niezawodność oraz monitoring usług, automatyzację testów i optymalizację infrastruktury chmurowej. 🗂️ Requirements: Minimum 5 lat doświadczenia jako Full Stack Software Engineer lub Software Engineer, Komercyjne doświadczenie z Java 11+ i Spring Boot oraz/lub TypeScript i React, Znajomość REST API i integracji frontend-backend, Doświadczenie z bazami danych, w szczególności PostgreSQL, Znajomość GitLab, Jira, SonarQube, Kubernetes, Grafana, CI/CD i architektury mikroserwisowej, Doświadczenie w testach automatycznych: unit, integration, end-to-end, Doświadczenie z komunikacją asynchroniczną i systemami rozproszonymi, Znajomość architektury oprogramowania i wzorców projektowych, Umiejętność prowadzenia dyskusji technicznych i współpracy zespołowej, Język angielski na poziomie minimum B2 📃 Skills: Java, SpringBoot, TypeScript, React, REST, PostgreSQL, GitLab, Jira, SonarQube, Kubernetes, Grafana, CI/CD, Microservices, Unit, Integration, End-toend, Kafka, Elasticsearch, Solr, AWS, Azure, GCP 🏢 Description: Dołącz do zespołu rozwijającego jedną z największych platform e-commerce B2B w Europie, obsługującą miliony produktów i klientów biznesowych w ponad 20 krajach. Jako Full Stack Software Engineer będziesz projektować, rozwijać i utrzymywać nowoczesne rozwiązania backendowe i frontendowe wspierające kluczowe procesy sprzedażowe. Wspólnie będziemy tworzyć skalowalną platformę opartą o mikroserwisy i nowoczesne technologie, stanowiącą fundament międzynarodowego rozwoju firmy. Stanowisko Fullstack Software Engineer Zakres obowiązków Projektowanie, rozwój i utrzymanie rozwiązań Full Stack obejmujących zarówno backend, jak i frontend. Tworzenie nowoczesnych, responsywnych i intuicyjnych interfejsów użytkownika. Rozwój oraz utrzymanie wysokowydajnych usług backendowych wspierających kluczowe procesy biznesowe. Zapewnianie wysokiej wydajności, skalowalności i dostępności systemów. Monitorowanie aplikacji i usług, wdrażanie mechanizmów alertowania oraz proaktywne rozwiązywanie problemów. Projektowanie skalowalnej architektury opartej na mikroserwisach oraz dbanie o bezpieczeństwo, niezawodność i jakość dostarczanych rozwiązań. Współpraca w interdyscyplinarnych, autonomicznych zespołach produktowych. Odpowiedzialność za rozwój rozwiązań w całym ich cyklu życia. Optymalizacja infrastruktury i wykorzystania zasobów chmurowych przy zachowaniu efektywności kosztowej. Wymagania Minimum 5 lat doświadczenia zawodowego na stanowisku Full Stack Software Engineer lub Software Engineer. Bardzo dobra znajomość Java 11+ i Spring Boot oraz/lub TypeScript i React poparta doświadczeniem komercyjnym. Dobra znajomość REST API oraz integracji frontend-backend. Doświadczenie w pracy z bazami danych, w szczególności PostgreSQL. Znajomość nowoczesnych narzędzi i praktyk wytwarzania oprogramowania, takich jak GitLab, Jira, SonarQube, Kubernetes, Grafana, CI/CD oraz architektura mikroserwisowa. Doświadczenie w tworzeniu testów automatycznych (unit, integration, end-to-end). Doświadczenie w pracy z komunikacją asynchroniczną oraz systemami rozproszonymi. Znajomość zagadnień związanych z architekturą oprogramowania i wzorcami projektowymi. Umiejętność prowadzenia merytorycznych dyskusji technicznych i efektywnej współpracy zespołowej. Znajomość języka angielskiego na poziomie minimum B2. Mile widziane Doświadczenie w pracy z platformami event streamingowymi (np. Kafka). Znajomość technologii wyszukiwania, takich jak Elasticsearch lub Solr. Doświadczenie w pracy z platformami chmurowymi (AWS, Azure lub GCP). Co oferujemy Pracę hybrydową w biurze (biuro w Warszawie przy stacji metra Młociny). Zatrudnienie w oparciu o umowę o pracę. Możliwość rozwoju zawodowego w strukturach wewnętrznych. Możliwość skorzystania z benefitów pozapłacowych na preferencyjnych warunkach. Zniżkę pracowniczą na części samochodowe grupy Inter Cars. Szkolenia wewnętrzne i zewnętrzne rozwijające kompetencje miękkie i techniczne. Dofinansowane do zajęć z języka angielskiego.

🏢 Summary: Fullstack Engineer role focused on building and scaling SaaS products, internal tools, AI-driven workflows, and third-party integrations. The position combines React/Next.js frontend work with Node.js/NestJS backend development, async processing, and production LLM automation. 🗂️ Requirements: 2.5+ years of professional full-stack experience, React.js, Next.js, Node.js, External API integrations, AI development tools, SQL, PostgreSQL, Async processing, Queues, Background jobs, Reliable-system design, English fluency, Polish fluency 📃 Skills: React.js, Next.js, Node.js, NestJS, OpenAI, Claude, Cursor, SQL, PostgreSQL, REST, WebSockets, LavinMQ, BullMQ, Kafka, GitLab, AWS, Fly.io, Golang, Elixir, Rust, BigQuery, ClickHouse, gRPC 🏢 Description: At Web Impact, we’re more than just an email marketing agency and digital solutions provider. We build cutting-edge, socially impactful products that redefine how businesses operate in the digital world. We’re looking for a Fullstack Engineer who enjoys building complex systems, integrating external services, and leveraging AI tools to speed up development and automate workflows. If you’re excited about combining modern frontend development with AI-driven workflows and automation tools like Claude Code, Cursor, and LLM frameworks , this one is for you. What You’ll Do Develop and contribute to end-to-end features across SaaS products and internal tools, collaborating with senior engineers on architecture and implementation decisions. Build modern, high-performance frontends using Next.js and React.js Develop scalable backend services using Node.js / NestJS Design and integrate APIs (REST, WebSockets, external services) Build and maintain automation workflows and background jobs Work with async systems, queues, and event-driven architectures Integrate third-party services with real-world constraints (rate limits, retries, auth flows) Use AI tools to improve development speed, testing, and automation Collaborate directly with product, data, and leadership teams Build MVPs, proof-of-concepts, and new product ideas from scratch Rapidly validate business ideas through experimentation and iteration Help evolve successful prototypes into production-ready systems AI & Automation This role includes working with modern AI tooling and automation systems, with a strong focus on speed, ownership, and execution : Using tools like Claude Code, Cursor, and OpenAI SDK in daily development Building AI-driven workflows and integrations quickly and iteratively Automating repetitive processes (data handling, content, integrations) Applying LLMs in production with a pragmatic, results-first approach Taking ownership of problems - from idea to production Shipping fast, testing in real conditions, and iterating based on outcomes Being accountable for delivery - not just writing code, but making things work end-to-end Prioritizing execution over perfection - speed is key What We’re Looking For 2,5+ years of professional full-stack experience Strong frontend skills in React.js / Next.js Backend experience with Node.js (NestJS preferred) Experience integrating external APIs (auth, pagination, retries, rate limits) Hands-on experience with modern AI tools (OpenAI, Claude, Cursor, etc.) Good SQL skills (PostgreSQL preferred) Experience working with async processing, queues, and background jobs Understanding of building reliable systems (error handling, retries, observability) Strong communication skills and ability to work cross-functionally Fluent in English and Polish Nice to Have Experience with Rust (async, Tokio, Axum) Experience with Elixir (Phoenix LiveView, GenServer) Understanding of distributed systems and architectures Experience with multi-region deployments and geo-distributed infrastructure Experience building systems with high parallelism (a large number of workers processing jobs concurrently) Familiarity with distributed databases and data consistency trade-offs Experience with multi-tenancy architectures (tenant isolation, scaling strategies) Experience working with high-throughput event pipelines Our Tech Stack Frontend: Next.js, React.js Backend: Node.js, NestJS, Golang, Elixir, Rust Data: PostgreSQL, BigQuery, ClickHouse Infra: AWS, Fly.io , Google Cloud, DigitalOcean Queues & Workers: LavinMQ, BullMQ, Kafka CI/CD: GitLab CI AI/ML & Automation: Proprietary GenAI models, OpenAI, Claude, internal tooling Integrations: REST, gRPC, WebSockets, external APIs with rate limits Why Join Us? Work on high-scale SaaS systems processing hundreds of millions of events daily , with real-time pipelines and data-heavy workloads. Ownership from day one - influence architecture, technology choices, and product direction. Collaborate with world-class engineers, AI specialists, and PMs. Innovation-first culture - explore cutting-edge frameworks and architectures. Fast execution, minimal bureaucracy, no unnecessary meetings Opportunity to work with modern AI tooling in production Competitive senior-level compensation and career growth. Social impact - contribute to automation products that empower businesses and communities. Our Streamlined Hiring Process Initial call Technical deep dive with our team Decision

🏢 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: 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: Fullstack Engineer role building and evolving a subscription-platform product, with broad ownership across backend, frontend, infrastructure, performance, and customer-driven improvements. The offer provides full remote work, competitive pay with ESOP, and the opportunity to shape product and technical decisions in a lean team. 🗂️ Requirements: 5+ years of software engineering experience, Proficiency with AI-assisted development tools, Command-line / terminal fluency, Knowledge of modern web technologies and standards, Experience with the core stack or equivalent technologies, Ability to learn new tools and frameworks quickly, Cross-functional technical collaboration, Fluent Polish, Fluent English at C1 level 📃 Skills: TypeScript, Fastify, PostgreSQL, BullMQ, Redis, JSON, TypeBox, OpenAPI, Vue, Storybook, Kubernetes, Helmfile, GitHub, Segment, Prometheus, Sentry, Slack, Linear, Notion 🏢 Description: About us At Juo, we're building software for businesses that want to build (or upgrade) and run their subscription offering. Business model-wise, Juo is a B2B SaaS company. Our initial and current focus has been on direct-to-consumer ecommerce businesses selling physical products, but our goal is to make Juo components applicable in any industry where a subscription model can be applied for selling things. Juo operates at the intersection of a few areas, like ecommerce and payments, and especially the new platform, with a strong focus on developer experience. The team is lean and consists only of very experienced people. We had built other successful businesses together. We’d built unsuccessful some too and learned a ton from that. We're backed by fantastic investors (MOC, Peak, Kogito, SMOK) and advisors, including domain experts from companies such as PayU, Piwik PRO, and Your KAYA. We've raised our seed round in November. In other words, we have all the resources needed to be able to focus on building the product, shipping fast, and delivering value to the clients. The role: Fullstack engineer Why this role We're looking for an ambitious and mature individual who will help us build Juo — by being a co-creator, not only an executor. We don't put ourselves into any box or "stack". Instead, each of us participates in the product development as broadly as possible, using the stack that works best for the given objective. This role will: Play a major part in the development of the product (not only by delivering its new features) Have a lot of freedom and ownership in day-to-day tasks Help you broaden your current superpowers with new exciting ones Be part of an exciting growth phase in Juo’s journey About the candidates This role is perfect for an individual who wants to have a real impact on a product they're working on. We're looking for an obsessive builder and a curious problem-solver, who knows how to ask the right questions and where to find answers for them. We work with many technologies that work for us best, so you should be open to getting to know new ones if such a need arises. The team's structure is flat, and thus we always seek people who think long-term and are looking for a longer commitment. We want to work only with those who are not driven by opportunism. We take both product development and relationship building equally seriously. Business-wise, we have passed the most difficult stage for any startup — finding the so-called product-market fit, which means we can focus on building and perfecting the product without financial concerns about the purpose of these actions. We are confident in ourselves, in what we do, and in the value we create for ourselves, our clients, and end users. Responsibilities: Building a new major iteration of the product with high extensibility and great developer experience in mind Developing new features and iteratively improving existing ones Finding, investigating, and fixing bugs and performance issues Supporting customers when the above occurs (customer-driven development) Discussing ideas, solutions and technologies with the team Proactively coming up with ideas for development and product improvements Requirements and qualifications: 5+ years of software engineering experience , ideally in a product-focused environment. Strong proficiency with AI-assisted development tools Solid command line / terminal fluency Broad understanding of modern web technologies , standards, and their nuances. Hands-on experience with our core tech stack (listed below) or equivalent technologies. Comfort operating in a fast-paced, lean startup environment. Growth mindset with a proven ability to pick up new tools and frameworks quickly. Strong cross-functional collaboration skills , comfortable discussing technical topics with product, support, and growth teams. Fluent Polish (written and spoken). Fluent English (C1 level), particularly for reading, writing technical documentation, and clear communication. Tech Backend: Modular Fastify server in TypeScript State persitance in Managed Postgresql database Critical and periodic tasks processed in dedicated BullMQ workers with Redis storage Strong I/O validation with JSON schemas generated with TypeBox with automatic OpenAPI schema generation Frontend: Multiple Vue front-ends in TypeScript Context/Provider pattern for state propagation Shared UI components with Storybook integration Automatically generated SDKs shared between front-ends Infrastructure and tools: Managed Kubernetes provisioned with Helmfile Full CI/CD on GitHub actions Data streamed through Segment Observability via Prometheus and Sentry Communication over Slack, Linear and Notion What we offer Building an extraordinary team is a fantastic challenge. We require a lot, but we give back to our teammates as much since they're not company assets, they're founders. What you'll get: Being a part of the team you can trust and rely on Taking an active part in building a revolutionary product loved by its users Competitive salary + Employee Stock Ownership Plan (ESOP) Full time Full remote Team retreats Macbook Pro and all the necessary tools (Slack, GitHub, Linear, Sentry) 1-on-1 access to the founders, investors, and advisors How to apply If this feels like the right fit, email us at jobs@juo.com with your resume, a few words about yourself, and why you want to join us. That's the best way to apply 🙂 You can use the button at the bottom of the page, but if you want to increase your chances, email is the way to go. We don't like long drawn-out processes — so usually the whole thing takes around 2 weeks from start to finish. And we answer every application. If your first email clicks, the next step will be a 15–30 min call with one of us (most of the time one of the founders) and we'll take it from there. Also, share this page if you know someone who might be interested. Either way, we're excited to hear from you! Thank you for your time.

🏢 Summary: Full Stack Engineer role focused on building an AI-native assistant that delivers reliable, persistent, goal-oriented workflows. The position covers frontend, backend and AI integrations, including agent planning, tool use, LLM reliability and real-time interactions in a remote-first global team. 🗂️ Requirements: Professional full-stack engineering experience across frontend and backend systems, System design, distributed applications and API architecture knowledge, Experience with LLMs, RAG systems or AI-powered applications, Ability to own features from concept through production deployment, Pragmatic decision-making in ambiguous, fast-moving environments, Cross-functional collaboration with engineering, Machine Learning and product teams 📃 Skills: Next.js, Python, Node.js, PyTorch, OpenAI, Anthropic, LLMs, RAG, SQL, NoSQL, Kubernetes, Docker, APIs 🏢 Description: About the product Our client is developing an AI-native assistant designed to support everyday communication, organization, errands and complex workflows with minimal user input. The product must reliably manage long-running processes, retain context, interact with external tools and complete real-world tasks despite the non-deterministic nature of modern AI models. The company’s objective is to make everyday activities significantly faster and easier for users. About the role We are looking for a Full Stack Engineer specializing in AI systems to build the product layer that transforms advanced AI capabilities into useful, production-grade workflows. You will help design how AI agents plan and operate, interact with external tools, manage failures, recover from errors and deliver consistent value to users. This is an end-to-end engineering role covering frontend development, backend systems and AI integrations. What you will do Build end-to-end product functionality across frontend, backend and AI integrations. Design agent workflows covering planning, tool use, multi-step execution, failure handling and recovery. Integrate LLMs, memory systems and external tools into applications that operate reliably under real-world conditions. Design real-time AI interactions involving streaming, partial results and strict latency requirements. Improve system reliability, observability and fallback mechanisms. Collaborate closely with Machine Learning, backend and product teams to deliver functionality from concept to production. Continuously improve the product based on real-world usage, evaluation results and observed failure modes. What we are looking for Strong professional experience in full stack engineering across frontend and backend systems. Solid understanding of system design, distributed applications and API architecture. Experience working with LLMs, RAG systems or other AI-powered applications. Ability to operate effectively in ambiguous situations and make pragmatic engineering decisions. Strong ownership and the ability to take functionality from an initial idea through implementation and production deployment. Confidence working in a fast-moving environment with evolving product requirements. Ability to collaborate effectively across engineering, Machine Learning and product teams. What success looks like AI-native product features progress beyond basic chat interfaces into persistent, goal-oriented workflows. Agent workflows reliably complete multi-step tasks across external tools and multiple user sessions. AI interactions remain responsive and achieve low latency without compromising output quality. Production systems include robust fallback and recovery mechanisms for LLM and external-tool failures. The reliability and completion rate of AI workflows improve through continuous evaluation, monitoring and iteration. Reusable patterns and abstractions support scalable integration of LLMs, memory and external tools. The resulting product experience feels proactive, consistent and dependable to users. Technology stack Next.js Python Node.js PyTorch OpenAI, Anthropic and open-source LLMs SQL and NoSQL databases Kubernetes Docker Compensation and employment The position is offered under an employment contract. The company does not publish a fixed external salary range. Compensation is assessed individually based on: professional experience and technical capability, scope of responsibility, location and relevant market benchmarks, expected impact on the product and organization. Candidates may share their expected compensation at the beginning of the recruitment process. The compensation package consists of a base salary and equity, with flexibility for exceptional candidates. A company laptop will be provided where required for the role. Remote work and global collaboration The company operates as a remote-first, globally distributed organization. There is no fixed company-wide working schedule and no requirement to follow one specific time zone. Team members are expected to maintain sufficient working-hours overlap with their immediate colleagues to collaborate effectively. The successful candidate will work from Poland and collaborate with frontend, backend, Machine Learning and product specialists located across different regions. Poland-based employees join existing global teams rather than a separate local team. The exact reporting line and hiring manager will be confirmed during the recruitment process. How the team works The company believes that outstanding products are built by small, highly capable and hands-on teams. Decisions are made collaboratively, while individuals are expected to take ownership, bring structure to ambiguous problems and execute independently. The team moves quickly while balancing production quality, experimentation and continuous learning from real user behavior. There is no fixed hiring quota for this position. The company is focused on identifying engineers who meet its technical and ownership standards rather than filling a predetermined number of seats. Recruitment process The standard recruitment process consists of up to four stages: Technical assessment, where relevant to the candidate’s background. HR interview. One or more technical interviews. Founder or leadership interview. Particularly strong candidates may be fast-tracked directly to the technical interview stage based on their experience and previous work. Applications are evaluated by members of the technical team. Interviews may be conducted virtually and, where relevant, onsite. The exact format and interviewers may vary. The company aims to make decisions efficiently and provide candidates with a prompt outcome.

🏢 Summary: Full Stack Engineer role focused on building an AI-native assistant that delivers reliable, persistent, goal-oriented workflows. The position covers frontend, backend and AI integrations, including agent planning, external-tool use, LLM reliability and real-time interactions in a remote-first global team. 🗂️ Requirements: Professional full-stack engineering experience, Frontend and backend systems experience, System design expertise, Distributed applications knowledge, API architecture knowledge, LLM, RAG or AI-powered application experience, Production deployment ownership, Cross-functional collaboration with Engineering, Machine Learning and Product teams 📃 Skills: Next.js, Python, Node.js, PyTorch, OpenAI, Anthropic, LLMs, RAG, SQL, NoSQL, Kubernetes, Docker, APIs 🏢 Description: About the product Our client is developing an AI-native assistant designed to support everyday communication, organization, errands and complex workflows with minimal user input. The product must reliably manage long-running processes, retain context, interact with external tools and complete real-world tasks despite the non-deterministic nature of modern AI models. The company’s objective is to make everyday activities significantly faster and easier for users. About the role We are looking for a Full Stack Engineer specializing in AI systems to build the product layer that transforms advanced AI capabilities into useful, production-grade workflows. You will help design how AI agents plan and operate, interact with external tools, manage failures, recover from errors and deliver consistent value to users. This is an end-to-end engineering role covering frontend development, backend systems and AI integrations. What you will do Build end-to-end product functionality across frontend, backend and AI integrations. Design agent workflows covering planning, tool use, multi-step execution, failure handling and recovery. Integrate LLMs, memory systems and external tools into applications that operate reliably under real-world conditions. Design real-time AI interactions involving streaming, partial results and strict latency requirements. Improve system reliability, observability and fallback mechanisms. Collaborate closely with Machine Learning, backend and product teams to deliver functionality from concept to production. Continuously improve the product based on real-world usage, evaluation results and observed failure modes. What we are looking for Strong professional experience in full stack engineering across frontend and backend systems. Solid understanding of system design, distributed applications and API architecture. Experience working with LLMs, RAG systems or other AI-powered applications. Ability to operate effectively in ambiguous situations and make pragmatic engineering decisions. Strong ownership and the ability to take functionality from an initial idea through implementation and production deployment. Confidence working in a fast-moving environment with evolving product requirements. Ability to collaborate effectively across engineering, Machine Learning and product teams. What success looks like AI-native product features progress beyond basic chat interfaces into persistent, goal-oriented workflows. Agent workflows reliably complete multi-step tasks across external tools and multiple user sessions. AI interactions remain responsive and achieve low latency without compromising output quality. Production systems include robust fallback and recovery mechanisms for LLM and external-tool failures. The reliability and completion rate of AI workflows improve through continuous evaluation, monitoring and iteration. Reusable patterns and abstractions support scalable integration of LLMs, memory and external tools. The resulting product experience feels proactive, consistent and dependable to users. Technology stack Next.js Python Node.js PyTorch OpenAI, Anthropic and open-source LLMs SQL and NoSQL databases Kubernetes Docker Compensation and employment The position is offered under an employment contract. The company does not publish a fixed external salary range. Compensation is assessed individually based on: professional experience and technical capability, scope of responsibility, location and relevant market benchmarks, expected impact on the product and organization. Candidates may share their expected compensation at the beginning of the recruitment process. The compensation package consists of a base salary and equity, with flexibility for exceptional candidates. A company laptop will be provided where required for the role. Remote work and global collaboration The company operates as a remote-first, globally distributed organization. There is no fixed company-wide working schedule and no requirement to follow one specific time zone. Team members are expected to maintain sufficient working-hours overlap with their immediate colleagues to collaborate effectively. The successful candidate will work from Poland and collaborate with frontend, backend, Machine Learning and product specialists located across different regions. Poland-based employees join existing global teams rather than a separate local team. The exact reporting line and hiring manager will be confirmed during the recruitment process. How the team works The company believes that outstanding products are built by small, highly capable and hands-on teams. Decisions are made collaboratively, while individuals are expected to take ownership, bring structure to ambiguous problems and execute independently. The team moves quickly while balancing production quality, experimentation and continuous learning from real user behavior. There is no fixed hiring quota for this position. The company is focused on identifying engineers who meet its technical and ownership standards rather than filling a predetermined number of seats. Recruitment process The standard recruitment process consists of up to four stages: Technical assessment, where relevant to the candidate’s background. HR interview. One or more technical interviews. Founder or leadership interview. Particularly strong candidates may be fast-tracked directly to the technical interview stage based on their experience and previous work. Applications are evaluated by members of the technical team. Interviews may be conducted virtually and, where relevant, onsite. The exact format and interviewers may vary. The company aims to make decisions efficiently and provide candidates with a prompt outcome.