Java Site Reliability Engineer (SRE) - Warsaw hybrid

🏢 Summary: Hybrid Product Reliability Engineering System Analyst role supporting highly available Value Added Services applications. The position focuses on availability, latency, performance, monitoring, incident analysis, change management, and long-term reliability improvements. 🗂️ Requirements: Bachelor’s degree in Computer Science or related engineering field, 2+ years of professional experience, 2+ years of Production Support experience, Experience working in a distributed team environment, Analytical problem-solving ability for complex production issues, Strong written and verbal communication skills 📃 Skills: Kubernetes, Docker, Hadoop, Kafka, Linux, UNIX, SQL, NoSQL, Java, J2EE, JVM, ServiceNow, Hazelcast 🏢 Description: Work mode: hybrid 3 days from office per week in Warsaw About the Role: This is a professional-level, high-impact position within the Product Reliability Engineering (PRE) team. As a PRE System Analyst, you will be the backbone of our critical, highly available applications powering Value Added Services . You won’t just “keep the lights on”—you will drive availability, reduce latency, optimize performance, and ensure operational efficiency. You will be hands-on in change management, proactive monitoring, incident detection, root cause analysis, and implementing permanent, game-changing solutions. What You’ll Do: Collaborate across Systems, Database, Engineering, Product Development, Clients, Risk, and other Technology teams . Participate in capacity planning and design reviews to identify and close gaps in supportability and system resiliency. Go beyond routine support: bring your creative curiosity and technical experience every day to build custom dashboards, intelligent alerts, audits, and innovative solutions that prevent issues before they happen. Basic Qualifications: Bachelor’s Degree in Computer Science or related engineering field. 2+ years of work experience, including 2+ years in Production Support within a distributed team environment. Preferred Qualifications (What will make you stand out): Containers: Kubernetes, Docker Data Streaming: Hadoop, Kafka OS Expertise: Linux, UNIX Databases: Relational & NoSQL (ability to write complex queries) Languages: Java, J2EE, scripting technologies JVM Internals: Ability to analyze thread dumps, heap dumps, garbage collection ITSM Tools: ServiceNow (incident, change, problem management, triaging, escalation) Specialized: Hazelcast, payment & transaction domain experience (a strong plus) We’re Looking For Someone Who Is: A strong executor with sharp analytical abilities to solve complex production problems. Dynamic, hard-working, and ambitious —a self-starter who thrives in a fast-paced environment. An excellent communicator (both oral and written) who can bridge technical and business needs.

🏢 Summary: Hybrid Senior Performance Test Engineer role focused on building automated performance testing frameworks and strategies for scalable, resilient digital products. The position uses JavaScript and k6 to test APIs, web applications, and distributed systems, embed testing in CI/CD, and drive performance improvements across engineering teams. 🗂️ Requirements: JavaScript (ES6+) proficiency, Automated test framework development experience, k6 performance testing experience, Load, stress, scalability testing and performance tuning knowledge, REST API and GraphQL API testing experience, CI/CD test integration experience, Git collaborative workflow experience, Docker and Kubernetes experience, Experience with AWS, Azure, or GCP, Observability and monitoring tool experience 📃 Skills: JavaScript, k6, REST, GraphQL, GitHubActions, GitLabCI, AzureDevOps, Jenkins, Git, Docker, Kubernetes, AWS, Azure, GCP, Grafana, Prometheus, ApplicationInsights 🏢 Description: Location: Warsaw, Poland (Hybrid – 2–3 days per week from office) About the Role We are looking for a Senior Performance Test Engineer to join our engineering team and help us build highly scalable, reliable, and resilient digital solutions. In this role, you will design and implement advanced performance testing strategies, develop automation frameworks, and work closely with engineering teams to identify bottlenecks and improve system performance. You will play a key role in embedding performance engineering practices into the software development lifecycle, enabling teams to deliver high-quality products that perform reliably at scale. This is an excellent opportunity for an experienced engineer who enjoys solving complex technical challenges, working with modern cloud technologies, and influencing engineering practices across distributed teams. Key Responsibilities Design, develop, and maintain performance testing frameworks and automation solutions using JavaScript (ES6+) . Create and execute performance, load, stress, and scalability testing strategies for modern applications. Develop and maintain performance test scenarios using k6 . Test and analyze the performance of: REST APIs GraphQL APIs Web applications and distributed systems Identify performance bottlenecks and provide actionable recommendations for optimization. Collaborate with developers, architects, DevOps, and product teams to improve system scalability and reliability. Integrate performance testing into CI/CD pipelines and engineering workflows. Support performance monitoring and analysis using observability platforms. Contribute to performance engineering standards, best practices, and continuous improvement initiatives. Work effectively with global, distributed engineering teams and communicate technical findings to both technical and non-technical stakeholders. Required Skills & Experience Strong proficiency in JavaScript (ES6+) . Proven experience building automated test frameworks and reusable testing solutions. Hands-on experience with k6 performance testing . Strong understanding of performance engineering methodologies, including: Load testing Stress testing Scalability testing Performance analysis and tuning Experience testing modern web applications and APIs, including: REST APIs GraphQL APIs Experience integrating automated tests into CI/CD pipelines , using tools such as: GitHub Actions GitLab CI Azure DevOps Jenkins Strong experience with Git and collaborative software development workflows. Solid understanding of software engineering principles and modern development practices. Excellent analytical and problem-solving skills. Cloud & Infrastructure Experience Experience working with modern cloud and infrastructure technologies: Docker and containerized environments. Kubernetes and cloud-native architectures. At least one major cloud platform: AWS Microsoft Azure Google Cloud Platform (GCP) Experience with observability and monitoring tools, such as: Grafana Prometheus Application Insights Similar monitoring and analytics platforms Soft Skills & Mindset Strong communication and stakeholder management skills. Ability to influence technical decisions and drive improvements without direct authority. Passion for quality engineering, automation, and developer enablement. Continuous learning mindset and curiosity about emerging technologies. Ability to collaborate effectively across international and distributed teams. Comfortable working independently while contributing to a highly collaborative engineering culture.

🏢 Summary: Backend Engineer role focused on building AI-centric digital products for employees and HR stakeholders. The position involves Java/Spring Boot microservices development, API and cloud integration, production observability, and maintaining secure, reliable solutions in a hybrid Kraków or Wrocław work model. 🗂️ Requirements: Strong Java and Spring Boot experience, Spring Batch and Spring Cloud experience, Microservices development experience, REST API and GraphQL schema design proficiency, NoSQL data modelling experience, Data streaming experience, OAuth 2.0 and Microsoft Entra ID knowledge, Azure Cloud Services familiarity, English communication skills, Agile collaboration experience, Commitment to quality, maintainability and documentation 📃 Skills: Java, SpringBoot, SpringBatch, SpringCloud, Microservices, REST, GraphQL, NoSQL, CosmosDB, Kafka, OAuth2, EntraID, Azure, AppServices, AzureMonitor, APIManagement, Observability, Testing 🏢 Description: Role summary We are looking for a Backend Engineer to design, develop, and continuously improve intelligent digital products and services that support employees and HR stakeholders, with AI at the core. 📍 Work mode: Hybrid (2–3 days/week) — Kraków or Wrocław office Primary skills Java, Spring Boot, microservices, REST APIs Key responsibilities: Design, develop, and continuously improve intelligent digital products and services that support employees and HR stakeholders, with AI at the core. Apply modern engineering practices, from analyzing user needs and developing new features to automated testing, deployment, and observability. Ensure quality, security, reliability, and compliance by applying digital principles and implementing functional and non-functional requirements. Build observability into solutions, monitor production health, help resolve incidents, and remediate root causes of risks and issues. Advocate for user and stakeholder needs, ensuring AI solutions are explainable, ethical, and human-centric. Share knowledge openly, contribute to hiring and onboarding, and help shape a collaborative, forward-thinking engineering culture. Required skills and experience: Strong experience in Java and Spring Boot, including Spring Batch and Spring Cloud, and building microservices. Proficiency in REST API and GraphQL schema design. Experience with NoSQL data modelling, such as Azure Cosmos DB ; data streaming, such as Confluent Kafka; and authentication/authorization protocols, including OAuth 2.0 and Microsoft Entra ID. Familiarity with Azure Cloud Services , including App Services, Azure Monitor, and API Management. Collaborative communication skills: able to express ideas clearly in English and adapt technical content for diverse audiences while working closely with product managers, designers, and engineers in agile settings. Strong commitment to quality, maintainability, documentation, and continuous learning. AI-related skills, such as Spring AI or LangChain, are a strong plus. Benefits ✅ Stable long-term cooperation with opportunity for extension Opportunity to work with modern technologies in an international environment Professional growth and continuous development opportunities Participation in challenging and impactful projects 📩 If you’re interested and meet the qualifications, please send your CV at alina.pchelnikova@dcvtechnologies.co.uk

🏢 Summary: Join a QA Backend Engineer role focused on ensuring the quality, stability, and reliability of complex distributed applications. You will test end-to-end backend processes, microservice integrations, and messaging flows while collaborating with development teams throughout the SDLC. The offer includes a hybrid work model, B2B cooperation, and benefits such as private healthcare, life insurance, Multisport, and e-learning access. 🗂️ Requirements: 5+ years of software testing experience, Backend testing experience, Microservices testing experience, Integration, system, usability, E2E and UAT testing, Test planning, analysis, execution and evaluation, Test design techniques, Asynchronous and event-driven systems, AWS SNS/SQS integration testing, SDLC knowledge, Defect management tools, Test management tools, API testing tools, SQL databases, Log analysis, request tracing and data-flow validation, Agile experience, Analytical and problem-solving skills, Communication and cross-team collaboration skills 📃 Skills: Testing, Microservices, AWS, SNS, SQS, SDLC, Jira, YouTrack, TestRail, Xray, Postman, Swagger, SQL, Agile, API, E2E, UAT 🏢 Description: Location : Hybrid work model (Warsaw, Mokotów). Onsite presence required on Thursdays and during PI Planning sessions Availability: ASAP / within 1 month Contract Type: B2B via Experis About the Role We are looking for a QA Backend Engineer to join a dynamic product development environment. In this role, you will be responsible for ensuring the quality, stability, and reliability of complex applications and integrations. You will work closely with multiple development teams, validating end-to-end business processes and backend flows across distributed systems and microservice-based architectures. Responsibilities Plan and execute integration, system, and usability testing activities Participate in End-to-End (E2E) and User Acceptance Testing (UAT) Validate complex backend processes across multiple microservices and integrations Analyze test results and identify potential risks affecting product quality and stability Work closely with developers to understand critical business and technical flows Analyze logs, trace requests, and validate data flow across services Support defect management and resolution activities Build strong cooperation with multiple development teams Collaborate with cross-functional and cross-team stakeholders to continuously improve product quality Contribute to testing strategy, planning, execution, and evaluation throughout the software development lifecycle Requirements At least 5 years of experience as a Software Tester Experience in planning, analyzing, executing, and evaluating tests Strong knowledge of common test design techniques Strong analytical and problem-solving skills Strong backend-focused testing experience Experience testing microservice-based architectures across multiple services Understanding of asynchronous and event-driven systems Experience with AWS SNS/SQS integrations and messaging flows Understanding of mobile and web-based applications Good understanding of the Software Development Lifecycle (SDLC) Experience with defect management tools such as Jira or YouTrack Experience with test management tools such as TestRail or Xray Experience using API testing tools such as Postman and Swagger Experience working with SQL databases Ability to analyze logs, trace requests, and validate data flows Experience working in Agile environments Strong communication and collaboration skills Ability to work effectively with multiple development teams Highly motivated team player with a proactive attitude Nice to Have Experience with test automation for mobile and web applications Knowledge of REST API standards, HTTP protocols, and API contract validation Experience within card payments or card management domains ISTQB Foundation Level and/or ISTQB Advanced Test Analyst certification Offer : Multisport card Private healthcare (Medicover) Access to an e learning platform Group life insurance

🏢 Summary: Hybrid Backend Developer role focused on building, testing, and maintaining reliable digital banking services in an agile team. The offer combines Java microservices development with ownership of test automation and backend quality, plus occasional business analysis support. Work is hybrid in Warsaw, with a long-term B2B engagement and a rate of up to 160 PLN net plus VAT per hour. 🗂️ Requirements: Java 21+, REST API and microservices development, Spring Boot 3.4 and Spring WebFlux, Hibernate, Git, Maven and Jenkins, Oracle DB, DB2 and SQL, SOLID principles, Test automation, Performance, unit, integration and API testing, Cucumber and WireMock, AI tools 📃 Skills: Java, REST, Microservices, SpringBoot, WebFlux, Hibernate, Git, Maven, Jenkins, Oracle, DB2, SQL, JUnit5, Cucumber, WireMock, AI 🏢 Description: General info: Model of work: hybrid (3 days work from office Warsaw) Type of contract: B2B, long-term cooperations Rate: up to 160 PLN nett + vat/ hour Introduction & Summary Looking for an experienced Backend Developer with a strong focus on testing and a willingness to engage in a blended capability role. This position offers the opportunity to work within an agile team while driving the quality and reliability of digital banking solutions. Main Responsibilities Design, develop, test, and maintain backend services that power our digital banking platforms. Drive backend testing activities within a dedicated agile team, ensuring high-quality, reliable, and scalable solutions. Collaborate closely with business stakeholders to understand requirements and contribute to solution design. Support analysis activities when needed, helping to translate business needs into technical solutions. Leverage AI-powered tools as part of daily development, testing, and delivery practices. Contribute to the full product lifecycle, from technical design and implementation to continuous improvement and operational support. Work collaboratively within a cross-functional agile team to deliver customer-focused digital banking services. Key Requirements Proficient in Java 21+, Rest API, and microservices. Experience with Spring Boot 3.4, Spring WebFlux, Hibernate, Git, Maven, Jenkins, Oracle DB/DB2/SQL, and Junit5. Knowledge of SOLID principles. Proficient in test automation, performance, unit, integration, and API testing. Familiarity with tools like Cucumber and WireMock. Experience in using AI tools. Nice to Have Frontend experience with JavaScript, TypeScript, Angular 2+, and Angular.JS. Familiarity with Playwright and qTest. ISTQB Foundation certification. Experience with Gherkin.

🏢 Summary: Senior Frontend Engineer role building enterprise AI interfaces and production Next.js applications with complex state, real-time functionality, and scalable frontend architecture. The position is fully on-site in Warsaw city centre, five days per week, with responsibility for UI quality, performance, accessibility, and enterprise-grade features. 🗂️ Requirements: Work on-site in Warsaw city centre 5 days per week, 5+ years of frontend development experience, 3+ years of React and TypeScript experience, Production Next.js experience, App Router and Server Components expertise, SSR, SSG and CSR knowledge, Complex state-management experience, Real-time and multi-tenant application experience, AI or LLM interface experience, Frontend performance and Core Web Vitals expertise, Accessibility, localization and frontend security knowledge, Experience handling sensitive data, Experience using AI coding assistants 📃 Skills: React, TypeScript, Next.js, SSR, SSG, CSR, LLM, AI, CoreWebVitals, Accessibility, Localization, Security, Claude, Codex, Copilot 🏢 Description: Please note: This role requires working from our office in Warsaw city centre 5 days a week . This is a fully on-site position , and remote or hybrid work is not available . About us We believe that businesses are moving toward AI-powered work, and we are building a platform for this future. Many AI agents cannot handle complex business tasks. We created a platform that organizes company policies, workflows, and business knowledge into one AI data model. This helps AI agents make accurate decisions and deliver reliable results at scale. We already work with well-known enterprise customers such as Glovo, Nespresso, and HelloFresh. Our platform supports thousands of users and processes real production data. Customers trust us with important business knowledge because we provide a secure and reliable solution with SOC2, HIPAA-ready security practices, and strong integrations. Job description We are looking for a Senior Frontend Engineer who enjoys building high-quality user interfaces for enterprise AI products. In this role, you will design and build important frontend features, solve complex UI problems, and improve the user experience over time. You will take ownership of frontend architecture and help build production Next.js applications with complex state management, real-time AI features, and enterprise functionality. The position is based in Warsaw and requires working from the office. Responsibilities Design and build production Next.js applications that support complex state, high traffic, and real-time AI features. Create user interfaces for AI-powered tools, including streaming AI responses, semantic search, knowledge graphs, and AI agents. Build and improve our component library and design system to keep the user experience consistent, accessible, and reusable. Deliver enterprise features such as localization, accessibility, browser compatibility, and security. Monitor applications after release, improve performance, reduce bundle size, track Core Web Vitals, and help systems scale. Maintain high engineering standards through code reviews, testing, and mentoring other developers. Requirements More than 5 years of frontend development experience, including at least 3 years working with React and modern TypeScript. Strong experience building production applications with Next.js, including App Router, Server Components, and understanding SSR, SSG, and CSR. Experience managing complex application state, including real-time updates, optimistic UI, multi-tenant systems, and large amounts of data. Experience building AI or LLM-based interfaces such as chat applications, streaming responses, or semantic search. Strong knowledge of frontend performance and experience improving Core Web Vitals in large applications. Good understanding of accessibility, localization, security, and enterprise application standards. A security-focused approach and experience working with sensitive data. Strong product thinking and the ability to improve user experience without waiting for detailed designs. Experience using AI coding assistants as part of your daily development work. Good written and spoken communication skills and the ability to explain technical decisions clearly. Nice to have Experience with React Flow, Highcharts, or other data visualization libraries. Experience building vector search, RAG, generative AI, or semantic search interfaces. Basic knowledge of Node.js or Python to understand backend code and APIs. Experience contributing to design systems or open-source UI libraries. What we offer B2B contract and company stock options. MacBook Pro. Modern technology stack and the opportunity to contribute to open-source projects. An AI-focused development environment with tools such as Claude Code, OpenAI Codex, and GitHub Copilot. Our values Our leadership team has strong experience in AI, knowledge management, and enterprise SaaS. We have received more than $60 million in funding and have been recognized by Gartner as a Cool Vendor. Our work is guided by these values: Quality – We care about excellent work and high standards in everything we build. Momentum – We take initiative, share ideas, and keep moving forward. Accountability – We take responsibility for our work and give honest, respectful feedback. Hard work – We believe success comes from teamwork, dedication, and consistent effort. Learning agility – We stay curious, learn from mistakes, and continue improving. Adapt and thrive – We welcome change and see challenges as opportunities to grow. Win together – We work as one team, communicate openly, and support our shared goals.