Senior Java Backend Engineer

🏢 Summary: Long-term Backend Java Engineer role focused on developing and integrating backend services for insurance applications supporting claims handling and valuation management. The position involves Java and PostgreSQL development, REST API integrations, application modernization, and secure coding practices in a highly integrated environment. Hybrid work in Warsaw with opportunities to work on modern technologies in an international team. 🗂️ Requirements: Commercial experience with Java 8 backend development, Experience with PostgreSQL, Experience integrating systems via REST APIs, Knowledge of Apigee, Understanding of OWASP Top 10, Knowledge of secure coding practices 📃 Skills: Java, PostgreSQL, REST, Apigee, OWASP, AWS, Docker, Kubernetes, OCR 🏢 Description: About Webellian Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the position We are looking for an experienced Backend (Java) Engineer to join a long-term project in the insurance domain. The project brings together three interconnected applications into a unified ecosystem supporting claims handling, valuation management, and comparison of repair estimates with counter-offers. The role focuses on backend development in a highly integrated environment, where multiple systems communicate through APIs. You will contribute to the development and maintenance of backend services while ensuring seamless integration between applications. Key responsibilities: Develop and maintain backend solutions using Java and PostgreSQL. Implement and maintain integrations between multiple systems using APIs. Collaborate with cross-functional teams to deliver reliable and scalable solutions. Support the modernization of existing applications, including Java version upgrades. Apply secure coding practices throughout the software development lifecycle. Required Experience & Skills Must have Commercial experience with Java 8 backend development (experience in upgrading Java versions is a plus). Experience working with PostgreSQL. Experience integrating systems via REST APIs in a complex, interconnected environment. Knowledge of Apigee. Understanding of application security principles, including OWASP Top 10 and secure coding best practices. Nice to have Experience upgrading applications to newer Java versions. Experience with AWS. Experience with Docker and Kubernetes. Experience with AI-based OCR and document processing. What we offer Contract under Polish law: B2B or Umowa o Pracę Benefits such as private medical care, group insurance, Multisport card There are English classes available Hybrid work (at least 1 day/week on-site) in Warsaw (Mokotów) Opportunity to work with excellent professionals High standards of work and focus on the quality of code New technologies in use Continuously learning and growth International team Pinball, PlayStation & much more (on-site) Join a growing team of dedicated professionals! We love to pass on the knowledge to grow excellence, speak our minds without playing politics, and just enjoy hanging around together. If you share our passions - we want to meet you! So go ahead and apply ➡️

🏢 Summary: Full Stack Engineer role focused on building scalable distributed applications using Java and modern frontend technologies in an agile environment. The position involves backend and frontend development, microservices, testing, and collaboration with cross-functional teams in a hybrid work model in Warsaw. 🗂️ Requirements: Proven experience as a Full Stack Engineer, Strong experience with Java, Strong experience with Spring, Strong experience with Kafka, Strong understanding of TypeScript, Strong understanding of Angular, Experience with databases, Experience with distributed systems, Solid understanding of microservice architecture, Experience writing unit tests, Experience writing integration tests, Ability to work in agile delivery environments, Strong communication skills 📃 Skills: Java, Spring, Kafka, TypeScript, Angular, SQL, Microservices, Docker, Kubernetes, OpenAPI, Swagger, Atlas, DevOps, AI, MachineLearning 🏢 Description: About Webellian Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the position We are seeking a motivated and experienced Full Stack Engineer with a strong background in Java and distributed systems to join our dynamic team. The ideal candidates will have extensive expertise in developing scalable and maintainable applications in agile-based delivery environments, with a proactive approach to problem-solving. Key responsibilities: Design, develop, and maintain applications in a complex and interconnected environment. Participate in code reviews and contribute to a culture of continuous improvement. Analyze existing business logic and data structures across several systems. Collaborate with cross-functional teams to refine, design, and develop new features. Troubleshoot and resolve complex technical issues. Required Experience & Skills Proven experience as a Full Stack Engineer Ability to learn quickly and adapt to new technologies and methodologies. Strong communication skills. Strong experience with backend technologies (Java, Spring, Kafka). Strong understanding of front-end technologies (TypeScript, Angular). Experience with databases and distributed systems. Solid understanding of microservice architecture. Strong testing background and experience writing unit- and integration tests. Preferred Qualifications Familiarity with containerization and orchestration tools (e.g., Docker, Kubernetes). DevOps experience. Knowledge of Atlas or similar database migration tools. Familiarity with OpenAPI/Swagger specifications and code generation. Knowledge of AI and machine learning concepts. What we offer Contract under Polish law: B2B or Umowa o Pracę Benefits such as private medical care, group insurance, Multisport card There are English classes available Hybrid work (at least 1 day/week on-site) in Warsaw (Mokotów) Opportunity to work with excellent professionals High standards of work and focus on the quality of code New technologies in use Continuously learning and growth International team Pinball, PlayStation & much more (on-site) Join a growing team of dedicated professionals! We love to pass on the knowledge to grow excellence, speak our minds without playing politics, and just enjoy hanging around together. If you share our passions - we want to meet you! So go ahead and apply ➡️

🏢 Summary: Senior Frontend Developer role focused on building AI-enabled web and iOS applications using React and Swift technologies. The position involves leading frontend architecture, performance optimization, testing strategies, and CI/CD integration while collaborating with cross-functional teams. Hybrid work in Warsaw with opportunities to work on modern technologies in an international environment. 🗂️ Requirements: 6+ years of frontend development experience, Expert-level JavaScript, Expert-level TypeScript, Expert-level React, Experience with Redux Toolkit or Zustand, Strong native iOS development with Swift, Experience with SwiftUI, Experience integrating REST APIs, Knowledge of OAuth2 and JWT authentication, Strong CSS and responsive design skills, Experience with Vite or Webpack, Hands-on experience with Claude Code, Experience with frontend testing frameworks, Ability to define frontend architecture and technical standards, Experience with CI/CD pipelines, Strong communication and collaboration skills 📃 Skills: JavaScript, TypeScript, React, Redux, Zustand, Swift, SwiftUI, UIKit, REST, OAuth2, JWT, CSS, Tailwind, StyledComponents, Emotion, Vite, Webpack, Jest, Vitest, Playwright, Cypress, XCTest, Fastlane, Xcode, CI/CD, SSR, CSR, ISR, WCAG 🏢 Description: About Webellian Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the position As a Senior Frontend Developer within Advanced Analytics, you will lead the design and development of user-facing AI-enabled products across web and mobile platforms. You will own the frontend layer of production applications — building sophisticated React-based web interfaces and native iOS mobile experiences that bring AI capabilities directly to end users across the globe. Key responsibilities: Architect and build production-grade React web applications: component design, state management, routing, performance optimization, and accessibility (WCAG compliance). Develop native iOS applications using Swift and SwiftUI (or UIKit where required), delivering high-quality, App Store-ready mobile experiences. Define and enforce frontend architecture standards: folder structure, component libraries, design system integration, and code quality conventions across web and mobile. Integrate frontend applications with REST APIs and event-driven backends, handling authentication flows, error boundaries, loading states, and real-time data patterns. Implement robust frontend testing strategies: unit tests (Jest, Vitest), component tests (React Testing Library), end-to-end tests (Playwright or Cypress), and iOS XCTest suites. Lead frontend performance engineering: bundle optimization, lazy loading, rendering strategies (SSR, CSR, ISR), Core Web Vitals, and iOS app performance profiling. Own the mobile development lifecycle on iOS: from Xcode project configuration and provisioning profiles to TestFlight distribution and App Store submission. Collaborate with UX Designers to translate designs into pixel-perfect, responsive, and accessible interfaces on both web and iOS. Champion AI-augmented development workflows using Claude Code: apply it actively for prototyping, code review, refactoring, and documentation generation. Conduct thorough code reviews, contribute to architectural decision records (ADRs), and mentor junior and mid-level frontend engineers. Work with DevOps to integrate frontend build and deployment into CI/CD pipelines: web app deployments, iOS build automation (Fastlane), and release management. Required Experience & Skills 6+ years of professional frontend development experience, with a strong track record of shipping production applications at scale. Expert-level JavaScript and TypeScript: deep understanding of the language, async patterns, module systems, and type-safe application design. Expert-level React: hooks, context, state management (Redux Toolkit, Zustand, or equivalent), performance patterns, and large-scale component architecture. Strong native iOS development skills using Swift and SwiftUI; experience with UIKit is a plus. Solid experience with iOS-specific concerns: push notifications, background processing, Keychain, deep linking, and App Store review guidelines. Experience consuming and designing frontend integrations with REST APIs, including authentication (OAuth2, JWT), error handling, and data caching strategies. Strong CSS and layout skills: responsive design, CSS-in-JS (Styled Components, Emotion), or utility-first frameworks (Tailwind CSS). Experience with frontend build tooling: Vite, Webpack, or equivalent; understanding of bundling, tree-shaking, and deployment optimization. Hands-on proficiency with Claude Code: using it daily for development, debugging, refactoring, and documentation tasks. Proven ability to define architecture, set standards, and lead technical decisions in a senior individual contributor or tech lead capacity. Strong communication skills: able to collaborate effectively with designers, product managers, and backend engineers across global, distributed teams. What we offer Contract under Polish law: B2B or Umowa o Pracę Benefits such as private medical care, group insurance, Multisport card English classes available Hybrid work (at least 1 day/week on-site) in Warsaw (Mokotów) Opportunity to work with excellent professionals High standards of work and focus on the quality of code New technologies in use Continuously learning and growth International team Pinball, PlayStation & much more (on-site) Join a growing team of dedicated professionals! We love to pass on the knowledge to grow excellence, speak our minds without playing politics, and just enjoy hanging around together. If you share our passions - we want to meet you! So go ahead and apply ➡️

🏢 Summary: Senior Frontend Developer role focused on leading the architecture and development of AI-enabled web and iOS applications, owning the full frontend layer from design to production. The position involves building scalable React applications and native iOS apps, integrating with backend services, and driving performance, testing, and CI/CD standards. The role combines hands-on development with architectural leadership and mentoring responsibilities. 🗂️ Requirements: 6+ years of professional frontend development experience, Expert-level JavaScript and TypeScript, Expert-level React including hooks and state management, Strong native iOS development experience with Swift and SwiftUI, Experience integrating frontend applications with REST APIs, Knowledge of OAuth2 and JWT authentication mechanisms, Experience with frontend testing frameworks, Experience with frontend build tools, Ability to define frontend architecture and technical standards, Experience working with CI/CD pipelines 📃 Skills: JavaScript, TypeScript, React, Redux, Zustand, Swift, SwiftUI, UIKit, REST, OAuth2, JWT, CSS, Tailwind, StyledComponents, Emotion, Vite, Webpack, Jest, Vitest, Playwright, Cypress, XCTest, Fastlane, Xcode, Claude, CI/CD 🏢 Description: About Webellian Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the position As a Senior Frontend Developer within Advanced Analytics, you will lead the design and development of user-facing AI-enabled products across web and mobile platforms. You will own the frontend layer of production applications — building sophisticated React-based web interfaces and native iOS mobile experiences that bring AI capabilities directly to end users across the globe. Key responsibilities: Architect and build production-grade React web applications: component design, state management, routing, performance optimization, and accessibility (WCAG compliance). Develop native iOS applications using Swift and SwiftUI (or UIKit where required), delivering high-quality, App Store-ready mobile experiences. Define and enforce frontend architecture standards: folder structure, component libraries, design system integration, and code quality conventions across web and mobile. Integrate frontend applications with REST APIs and event-driven backends, handling authentication flows, error boundaries, loading states, and real-time data patterns. Implement robust frontend testing strategies: unit tests (Jest, Vitest), component tests (React Testing Library), end-to-end tests (Playwright or Cypress), and iOS XCTest suites. Lead frontend performance engineering: bundle optimization, lazy loading, rendering strategies (SSR, CSR, ISR), Core Web Vitals, and iOS app performance profiling. Own the mobile development lifecycle on iOS: from Xcode project configuration and provisioning profiles to TestFlight distribution and App Store submission. Collaborate with UX Designers to translate designs into pixel-perfect, responsive, and accessible interfaces on both web and iOS. Champion AI-augmented development workflows using Claude Code: apply it actively for prototyping, code review, refactoring, and documentation generation. Conduct thorough code reviews, contribute to architectural decision records (ADRs), and mentor junior and mid-level frontend engineers. Work with DevOps to integrate frontend build and deployment into CI/CD pipelines: web app deployments, iOS build automation (Fastlane), and release management. Required Experience & Skills 6+ years of professional frontend development experience, with a strong track record of shipping production applications at scale. Expert-level JavaScript and TypeScript: deep understanding of the language, async patterns, module systems, and type-safe application design. Expert-level React: hooks, context, state management (Redux Toolkit, Zustand, or equivalent), performance patterns, and large-scale component architecture. Strong native iOS development skills using Swift and SwiftUI; experience with UIKit is a plus. Solid experience with iOS-specific concerns: push notifications, background processing, Keychain, deep linking, and App Store review guidelines. Experience consuming and designing frontend integrations with REST APIs, including authentication (OAuth2, JWT), error handling, and data caching strategies. Strong CSS and layout skills: responsive design, CSS-in-JS (Styled Components, Emotion), or utility-first frameworks (Tailwind CSS). Experience with frontend build tooling: Vite, Webpack, or equivalent; understanding of bundling, tree-shaking, and deployment optimization. Hands-on proficiency with Claude Code: using it daily for development, debugging, refactoring, and documentation tasks. Proven ability to define architecture, set standards, and lead technical decisions in a senior individual contributor or tech lead capacity. Strong communication skills: able to collaborate effectively with designers, product managers, and backend engineers across global, distributed teams. What we offer Contract under Polish law: B2B or Umowa o Pracę Benefits such as private medical care, group insurance, Multisport card English classes available Hybrid work (at least 1 day/week on-site) in Warsaw (Mokotów) Opportunity to work with excellent professionals High standards of work and focus on the quality of code New technologies in use Continuously learning and growth International team Pinball, PlayStation & much more (on-site) Join a growing team of dedicated professionals! We love to pass on the knowledge to grow excellence, speak our minds without playing politics, and just enjoy hanging around together. If you share our passions - we want to meet you! So go ahead and apply ➡️

🏢 Summary: Senior AI/Full Stack Engineer role focused on building AI-powered applications using LLMs, RAG systems, and modern full-stack technologies. The position involves developing and deploying intelligent systems, integrating AI with external services, and making architectural decisions in a collaborative environment. The offer includes work with cutting-edge AI tooling, local GPU infrastructure, and high ownership over technical decisions. 🗂️ Requirements: 5+ years of full-stack development experience, TypeScript, Node.js, Nest.js, React, Experience with LLM deployment and serving, Experience building RAG systems, Understanding of prompt engineering, Understanding of agent/tool-use patterns, Experience with relational databases, Redis, Docker, Basic CI/CD knowledge, Ability to evaluate model performance, English B2+, Strong problem-solving skills 📃 Skills: AI, ML, LLMs, RAG, TypeScript, Node.js, Nest.js, React, PostgreSQL, Redis, Docker, CI/CD, Embeddings, LangChain, AWS, LoRA, QLoRA, MLOps, GPU 🏢 Description: About Webellian Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the role We are seeking a Senior AI/Full Stack Engineer to join our team and drive the development of AI-powered solutions for our clients. You will work on projects that combine modern web development with applied AI - from building intelligent agents and search systems to deploying and optimizing language models on dedicated infrastructure. This role bridges two worlds: solid full-stack engineering and practical AI/ML implementation. You'll design, build, and ship products that leverage LLMs, RAG, and other AI techniques to solve real business problems. Your responsibilities Designing and developing full-stack applications with AI capabilities Deploying, configuring, and optimizing LLMs (both cloud APIs and self-hosted) Building and maintaining RAG pipelines, vector search, and knowledge retrieval systems Integrating AI systems with external services and APIs Evaluating and selecting appropriate models and tools for specific use cases Writing clean, maintainable code with tests and documentation Proposing technical improvements and architectural decisions Supporting and mentoring less experienced team members Must-have requirements AI/ML: Hands-on experience with LLM deployment and serving (cloud APIs and/or self-hosted solutions) Experience building RAG systems (embeddings, vector stores, retrieval strategies) Understanding of prompt engineering and agent/tool-use patterns Ability to evaluate model performance and make informed trade-off decisions Full Stack: 5+ years in full-stack development with TypeScript/Node.js, Nest.js Frontend experience with React Relational databases (PostgreSQL or similar), Redis Docker, basic CI/CD Soft skills: Self-driven, able to take ownership of projects end-to-end Strong problem-solving skills English B2+ (C1 preferred) Excellent communication - able to translate technical concepts for non-technical stakeholders Nice-to-have Experience with model fine-tuning (LoRA, QLoRA) MLOps practices (experiment tracking, model versioning) Familiarity with agent frameworks (LangChain, Vercel AI SDK, or similar) React Native and knowledge of mobile development Experience with GPU infrastructure and model optimization (quantization, inference tuning) AWS or other cloud provider (working knowledge) What we offer Projects at the intersection of AI and software engineering Opportunity to work with cutting-edge AI tooling and local GPU infrastructure Autonomy and ownership over technical decisions Hybrid work mode Small, collaborative team Challenging problems - no boring CRUD work

🏢 Summary: Senior AI/Full Stack Engineer role focused on building and delivering AI-powered web applications that integrate LLMs, RAG pipelines, and modern full-stack technologies. The position combines hands-on AI/ML implementation with TypeScript-based backend and React frontend development. You will design, deploy, and optimize intelligent systems running on cloud and self-hosted infrastructure. 🗂️ Requirements: 5+ years of full-stack development experience, Hands-on experience with LLM deployment and serving (cloud APIs or self-hosted), Experience building RAG systems including embeddings and vector stores, Understanding of prompt engineering and agent/tool-use patterns, Ability to evaluate model performance and make trade-off decisions, Strong experience with TypeScript and Node.js, Experience with Nest.js, Frontend development experience with React, Experience with relational databases such as PostgreSQL, Experience working with Redis, Experience using Docker, Basic knowledge of CI/CD pipelines 📃 Skills: TypeScript, Node.js, Nest.js, React, PostgreSQL, Redis, Docker, CI/CD, LLM, RAG, Embeddings, VectorDB, APIs 🏢 Description: About Webellian Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the role We are seeking a Senior AI/Full Stack Engineer to join our team and drive the development of AI-powered solutions for our clients. You will work on projects that combine modern web development with applied AI - from building intelligent agents and search systems to deploying and optimizing language models on dedicated infrastructure. This role bridges two worlds: solid full-stack engineering and practical AI/ML implementation. You'll design, build, and ship products that leverage LLMs, RAG, and other AI techniques to solve real business problems. Your responsibilities Designing and developing full-stack applications with AI capabilities Deploying, configuring, and optimizing LLMs (both cloud APIs and self-hosted) Building and maintaining RAG pipelines, vector search, and knowledge retrieval systems Integrating AI systems with external services and APIs Evaluating and selecting appropriate models and tools for specific use cases Writing clean, maintainable code with tests and documentation Proposing technical improvements and architectural decisions Supporting and mentoring less experienced team members Must-have requirements AI/ML: Hands-on experience with LLM deployment and serving (cloud APIs and/or self-hosted solutions) Experience building RAG systems (embeddings, vector stores, retrieval strategies) Understanding of prompt engineering and agent/tool-use patterns Ability to evaluate model performance and make informed trade-off decisions Full Stack: 5+ years in full-stack development with TypeScript/Node.js, Nest.js Frontend experience with React Relational databases (PostgreSQL or similar), Redis Docker, basic CI/CD Soft skills: Self-driven, able to take ownership of projects end-to-end Strong problem-solving skills English B2+ (C1 preferred) Excellent communication - able to translate technical concepts for non-technical stakeholders Nice-to-have Experience with model fine-tuning (LoRA, QLoRA) MLOps practices (experiment tracking, model versioning) Familiarity with agent frameworks (LangChain, Vercel AI SDK, or similar) Experience with GPU infrastructure and model optimization (quantization, inference tuning) AWS or other cloud provider (working knowledge) What we offer Projects at the intersection of AI and software engineering Opportunity to work with cutting-edge AI tooling and local GPU infrastructure Autonomy and ownership over technical decisions Hybrid work mode Small, collaborative team Challenging problems - no boring CRUD work

🏢 Summary: Frontend Vue.js Engineer role for a long-term insurance project focused on integrating multiple applications into a unified ecosystem for claims handling and valuation management. The position involves developing modern web applications, integrating frontend interfaces with REST APIs, and maintaining end-to-end testing in a highly connected environment. The offer includes hybrid work in Warsaw, flexible contract options, and access to modern technologies and international collaboration. 🗂️ Requirements: Commercial experience with JavaScript, Experience with Vue.js, Experience working with REST APIs, Experience creating and maintaining end-to-end tests with Cypress, Ability to work in a complex interconnected environment 📃 Skills: JavaScript, Vue.js, REST, Cypress, AWS, Docker, Kubernetes, OWASP, OCR 🏢 Description: About Webellian Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the position We are looking for a Frontend (Vue.js) Engineer to join a long-term project in the insurance domain. The project brings together three interconnected applications into a unified ecosystem supporting claims handling, valuation management, and comparison of repair estimates with counter-offers. The role focuses on developing and maintaining modern web applications in a highly integrated environment, where multiple systems communicate through APIs. You will work on creating intuitive user interfaces, ensuring seamless integration with backend services, and contributing to the quality and reliability of the application through automated testing. Key responsibilities: Develop and maintain frontend applications using JavaScript and Vue.js. Build user interfaces that integrate with backend services via REST APIs. Create and maintain end-to-end tests using Cypress. Collaborate with cross-functional teams to deliver high-quality solutions. Contribute to application quality by following development best practices and supporting continuous improvements. Required Experience & Skills Must have Commercial experience with JavaScript development. Experience with Vue.js. Experience working with REST APIs in a complex, interconnected environment. Experience creating and maintaining end-to-end tests using Cypress. Nice to have Experience with AWS. Experience with Docker and Kubernetes. Basic understanding of application security principles, including OWASP Top 10 and secure coding best practices. Experience with AI-based OCR and document processing. What we offer Contract under Polish law: B2B or Umowa o Pracę Benefits such as private medical care, group insurance, Multisport card There are English classes available Hybrid work (at least 1 day/week on-site) in Warsaw (Mokotów) Opportunity to work with excellent professionals High standards of work and focus on the quality of code New technologies in use Continuously learning and growth International team Pinball, PlayStation & much more (on-site) Join a growing team of dedicated professionals! We love to pass on the knowledge to grow excellence, speak our minds without playing politics, and just enjoy hanging around together. If you share our passions - we want to meet you! So go ahead and apply ➡️ Apply now

🏢 Summary: Full Stack Technical Lead role focused on leading an engineering team delivering cloud-native digital insurance products. The position combines hands-on backend and frontend development with ownership of application architecture, API design, and technical standards. You will drive technical direction, ensure delivery quality, and collaborate closely with product, platform engineering, and business stakeholders. 🗂️ Requirements: 7+ years professional software engineering experience, Minimum 2 years in a technical leadership role, Strong backend development experience in Java and Spring Boot or equivalent, Frontend development experience in React or equivalent, Experience designing microservices architectures and REST APIs at production scale, Understanding of distributed system patterns, Experience designing services for Kubernetes environments, Familiarity with CI/CD and GitOps deployment models, Experience leading Agile sprint delivery and technical scoping, Experience in regulated industries such as insurance, finance, or healthcare 📃 Skills: Java, Spring, SpringBoot, React, Microservices, REST, Kubernetes, CI/CD, GitOps, Kafka, Azure, API, Docker 🏢 Description: About Webellian Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the position As a Full Stack Technical Lead you will lead an engineering team building digital insurance products and services. You are the technical authority for your team: you own the application architecture, set the engineering standards, and are responsible for the quality of everything the team ships. You will work within a cloud-native engineering environment where CI/CD pipelines, containerisation standards, and deployment tooling are provided centrally. Your role is to lead the application layer (service design, API architecture, and team delivery), not to own infrastructure. You are the primary technical interface between your product team and the central platform engineering function, and between engineering and the wider product and business stakeholders. This is a hands-on technical leadership role. You will be expected to remain close to the code while carrying the responsibility for the team's technical direction and delivery quality. Key responsibilities: Architecture and Technical Direction Own the application architecture for your product: service decomposition, API design, data models, event schemas, and integration patterns with core insurance systems. Make architectural decisions that are durable, well-reasoned, and clearly communicated to the team and stakeholders. Identify and manage technical debt: prioritise pragmatically, document trade-offs, and schedule remediation in delivery planning. Define technical standards for the team (coding conventions, testing practices, API versioning, observability instrumentation) and hold the team to them. Work within the deployment and containerisation standards provided by the central engineering platform; raise and influence changes to those standards through the appropriate channels. Delivery Leadership Translate business and product requirements into technical designs; lead estimation and scope definition. Identify and communicate technical risk early; propose mitigations and make trade-offs transparent to the Product Owner. Collaborate with the Product Owner on sprint planning to ensure technical work is appropriately sized, dependency-mapped, and sequenced. Represent engineering in architecture reviews, sprint reviews, and stakeholder discussions. Interface with the central platform engineering team on technical questions, onboarding requirements, and issue escalations. Team and Code Quality Own the code review process: set the bar, lead by example, and ensure reviews are substantive and timely. Mentor mid-level and senior engineers: support their technical growth through pairing, design discussion, and structured feedback. Build a team culture of ownership, quality, and continuous improvement; facilitate retrospective follow-through on engineering practices. Onboard new engineers to the codebase, standards, and ways of working. Collaboration Collaborate with frontend Tech Leads and other domain teams on cross-cutting API contracts and shared integration points. Work with the Product Owner on roadmap planning: provide clear technical input on feasibility, effort, and sequencing. Communicate clearly across technical and non-technical stakeholders; translate engineering complexity into business-relevant language. Required Experience & Skills 7+ years of professional software engineering experience, with at least 2 years in a technical leadership role (Tech Lead, Principal Engineer, or equivalent). Deep backend development experience: Java (Spring Boot) or equivalent, able to review, design and contribute to production code. Frontend experience: React or equivalent, able to review and contribute to production code. Capable of participating meaningfully in cross-functional technical discussions spanning frontend, BFF, and backend layers. Microservices architecture: service boundary design, API design and versioning, distributed system patterns (eventual consistency, idempotency, retry strategies). REST API design at production scale: resource modelling, contract versioning, backward compatibility, error handling conventions. Kubernetes-aware service design: designing services to run well in Kubernetes (readiness/liveness probes, graceful shutdown, resource requests, horizontal scaling). You do not need to operate the cluster. CI/CD and GitOps familiarity: understanding of pipeline-based and pull-based deployment models; able to work within and influence deployment standards. Agile delivery leadership: experience leading a team through sprint delivery, dependency management, and technical scoping in a product-led environment. Regulated industry experience: insurance, finance, or healthcare. Understands the implications of audit logging, data residency, access control, and compliance requirements on engineering decisions. Strong communicator: able to lead technical discussions, document architectural decisions clearly, and represent engineering credibly to non-technical audiences. Ways of Working Leads by example: stays close to the code and models the quality and rigour expected from the team. Collaborative and direct: shares context freely, gives clear feedback, and creates an environment where engineers can raise concerns and propose improvements. Pragmatic: balances technical correctness with delivery reality; makes trade-offs explicitly rather than silently. Comfortable with ambiguity: can scope and lead work in areas where requirements are still forming, and knows how to structure discovery to reduce uncertainty. Proactive learner: keeps up with backend and cloud-native ecosystem developments; comfortable adopting AI-assisted developer tools (e.g. GitHub Copilot, Claude Code) to improve team productivity. Nice to Have Insurance or financial services domain knowledge: understanding of claims, policy, or payment workflows. Experience integrating AI or ML services into production business logic: consuming model outputs, handling confidence thresholds, building human-in-the-loop workflows. Event-driven architecture experience: Kafka or equivalent at production scale. Cloud certifications: AZ-204 (Azure Developer), AZ-305 (Azure Solutions Architect), or equivalent. Experience leading distributed or multi-vendor engineering teams. What we offer Contract under Polish law: B2B or Umowa o Pracę Benefits such as private medical care, group insurance, Multisport card Hybrid work (at least 1 day per 2 or 3 months on-site) in Warsaw (Mokotów) Opportunity to work with excellent professionals High standards of work and focus on the quality of code New technologies in use Continuously learning and growth International team Pinball, PlayStation & much more (on-site) Join a growing team of dedicated professionals! We love to pass on the knowledge to grow excellence, speak our minds without playing politics, and just enjoy hanging around together. If you share our passions - we want to meet you! So go ahead and apply ➡️

🏢 Summary: Site Reliability Engineer role focused on ensuring reliability, scalability, and operational excellence of a cloud-based analytics platform running AI services, Java APIs, and frontend applications. The position centers on Kubernetes infrastructure (AKS), Azure cloud services, Infrastructure as Code, observability, incident management, and automation. You will drive SLO/SLI practices, improve platform resilience, and eliminate operational toil through automation and CI/CD integration. 🗂️ Requirements: 5+ years experience in SRE, DevOps, or Platform Engineering, Strong Kubernetes cluster operations and troubleshooting experience, Hands-on experience with Terraform for Infrastructure as Code, Production experience with Azure services (AKS, ACR, Key Vault, Azure Monitor, Application Insights, VNet), Experience with Prometheus and Grafana for observability and alerting, Knowledge of SLO/SLI methodology and error budget management, Experience in incident management and on-call support, Scripting skills in Python or Bash, Experience with CI/CD and GitOps tools (GitHub Actions, ArgoCD) 📃 Skills: Kubernetes, AKS, Azure, Terraform, Prometheus, Grafana, Python, Bash, GitHub, ArgoCD, ACR, KeyVault, AzureMonitor, ApplicationInsights, VNet, Ingress, Docker, GitOps, CI/CD 🏢 Description: About Webellian Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the position As a Site Reliability Engineer within Advanced Analytics Team you will join the Infra team to own the reliability and operational health of the platform. You will define and maintain service level objectives, drive incident response at the infrastructure layer, and systematically eliminate operational toil through automation. You will work closely with Platform Engineers, Security Engineers, and the Run & Change team to ensure the platform meets its reliability commitments across production workloads spanning AI services, Java APIs, and frontend applications. Key responsibilities: Define, instrument, and maintain SLOs and SLIs for platform components; own error budget tracking and produce regular reliability reports for hub leadership. Serve on the on-call rotation as the infrastructure escalation tier; lead incident response for cluster-level, network-level, and storage failures; chair blameless post-incident reviews. Implement and operate Kubernetes infrastructure (AKS): cluster lifecycle management, networking, resource quotas, autoscaling configuration, and multi-tenancy patterns across spoke namespaces. Develop Infrastructure as Code (Terraform) to provision and manage Azure resources with consistency, auditability, and repeatable rollback capability. Build and maintain observability infrastructure: Prometheus, Grafana, Azure Monitor, and Application Insights; own alerting rules, dashboards, and distributed tracing coverage across platform components. Perform capacity planning and cost-aware resource management: right-size node pools, tune vertical and horizontal pod autoscalers, and identify resource waste across namespaces. Identify and eliminate toil: automate repetitive operational tasks through scripting and tooling; measure and track toil reduction over time. Maintain platform reliability procedures: rolling upgrades, backup and recovery testing, disaster recovery runbooks, and change freeze coordination. Contribute to CI/CD pipelines and GitOps tooling (GitHub Actions, ArgoCD) from a reliability and deployment safety perspective; work with the Platform Team on release gates and rollback mechanisms. Collaborate with the Run & Change team on incident SLA targets and operational procedures; work with Security Engineers on infrastructure hardening and vulnerability remediation. Required Experience & Skills 5+ years professional experience in site reliability engineering, DevOps, or platform engineering roles. Strong Kubernetes experience: cluster operations, networking (Ingress, network policies), storage, autoscaling, and hands-on troubleshooting across production environments. Solid Infrastructure as Code experience with Terraform; familiarity with Bicep or ARM templates is a plus. Production experience with Azure cloud services: AKS, ACR, Key Vault, Azure Monitor, Application Insights, Virtual Networks, and Private Endpoints. Strong observability experience: Prometheus, Grafana, centralized logging, alerting configuration, and distributed tracing instrumentation. Working knowledge of SLO/SLI methodology: error budget principles, reliability target setting, and capacity planning. Structured incident management experience: on-call ownership, blameless post-incident review, and runbook authorship. Scripting and automation proficiency in Python or bash for toil elimination and operational tooling. Strong CI/CD experience: GitHub Actions and ArgoCD or equivalent GitOps tooling. Ways of Working Comfortable in agile, iterative delivery environments with personal ownership and accountability for platform reliability. Clear communicator across global, cross-functional stakeholders; able to translate technical reliability metrics into business impact for non-technical audiences. Proactive learner with pragmatic adoption of AI-assisted developer tools (e.g., GitHub Copilot, Claude Code) to improve automation coverage and delivery velocity. Nice to Have Kubernetes certifications: CKA or CKAD. Experience supporting AI or ML infrastructure workloads: GPU scheduling, model serving platforms, or inference pipeline operations. Exposure to chaos engineering practices and fault injection testing. FinOps experience: reserved capacity planning, resource right-sizing programs, and cost attribution per team or workload. Service mesh experience (Istio, Linkerd) for traffic management and reliability patterns. Experience in regulated industries (insurance, finance, healthcare) where auditability, change traceability, and secure-by-default operations are standard practice. What we offer Contract under Polish law: B2B or Umowa o Pracę Benefits such as private medical care, group insurance, Multisport card English classes available Hybrid work (at least 1 day/week on-site) in Warsaw (Mokotów) Opportunity to work with excellent professionals High standards of work and focus on the quality of code New technologies in use Continuously learning and growth International team Pinball, PlayStation & much more (on-site) Join a growing team of dedicated professionals! We love to pass on the knowledge to grow excellence, speak our minds without playing politics, and just enjoy hanging around together. If you share our passions - we want to meet you! So go ahead and apply ➡️

🏢 Summary: Mid Java Developer role focused on developing and maintaining a server-side rendered Java application for the insurance industry, primarily backend-oriented. The position involves building new features, maintaining existing components, deploying WAR packages, and integrating with multiple enterprise systems. Work is done in an international Agile team with strong emphasis on code quality and backend architecture. 🗂️ Requirements: Minimum 3 years of experience in Java development, Experience with JDBC and plain SQL, Experience with Oracle databases, Experience with Maven, Experience with Apache Tomcat and WAR deployments, Experience with JAXB and XStream, Familiarity with enterprise application stacks, Experience with Agile/Scrum, Fluency in English 📃 Skills: Java, JDBC, SQL, Oracle, JAXB, XStream, Maven, Tomcat, WAR, Servlets, JSP, JSTL, jQuery, CSS, Kernel, PriceEngine, CalculationEngine 🏢 Description: About the Webellian Webellian is a well-established Digital transformation and IT consulting company committed to creating a positive impact for our clients. We are driven by shared values, strong principles, and a passion for innovative and disruptive technologies. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy. About the position We are looking for a Mid Java Developer with at least 3 years of experience to join an international team working for one of our customers - a leader in the insurance industry. As a Mid Java Developer, you will work on the development and maintenance of a server-side rendered (SSR) Java application, which constitutes the core of the system (approximately 80–90% backend/server-side logic). The frontend layer represents around 10–20% of the application and is implemented mainly to complement UI limitations of the Java server-side technology stack. You will contribute to an internal business application integrated with multiple enterprise systems and tailored to complex insurance processes. You will collaborate with teammates located in Poland and across Europe, working closely with product owners and application users. Key responsibilities Development of new application features Maintenance and enhancement of existing system components Application testing and debugging Application deployment and packaging (WAR-based deployments) Writing clean, maintainable backend code Preparing technical documentation Proposing technical improvements and optimizations Competencies Java JDBC / plain SQL (mainly Oracle database) JAXB, XStream Maven Apache Tomcat (WAR packaging & deployment) Internal engines: Kernel, PriceEngine, CalculationEngine Nice to have Servlets & JSP, JSTL jQuery, CSS T-Konfigurator (TKUI) Experience working with SSR applications Other requirements Familiarity with databases Familiarity with common enterprise application stacks Great attention to detail Experience with Agile/Scrum methodologies is a must Fluency in English is a must Excellent verbal communication skills are a must Independence and drive to grow and learn What we offer Contract under Polish law: B2B or Umowa o Pracę Benefits such as private medical care, group insurance, Multisport card English classes available Hybrid work (at least 3 days/week on-site) in Warsaw (Mokotów) Opportunity to work with excellent professionals High standards of work and focus on the quality of code New technologies in use Continuously learning and growth International team Pinball, PlayStation & much more (on-site) Join a growing team of dedicated professionals! We love to pass on the knowledge to grow excellence, speak our minds without playing politics, and just enjoy hanging around together. If you share our passions - we want to meet you! So go ahead and apply ➡️