Java Developer (Freelance)

🏢 Summary: Mid-level Java Developer role focused on building and maintaining a SaaS platform for enterprise customers, working as an integrated member of the client’s engineering team. The position involves backend development, ERP integrations, data analysis, and supporting production issues during US working hours. This is a B2B contract with fixed afternoon/evening CET working hours. 🗂️ Requirements: 2–4 years backend development experience with Java, Strong knowledge of object-oriented programming, Experience with Spring Boot, Experience designing RESTful APIs, Experience with SQL and relational databases, Ability to work independently during off-standard hours, Professional proficiency in English 📃 Skills: Java, Spring, SpringBoot, REST, SQL, RDBMS, OOP, ERP, CI/CD, AWS, Docker 🏢 Description: We are looking for a Mid-level Java Developer to join our client’s engineering team and support the development of a SaaS platform used by enterprise customers. This role requires working in close collaboration with both Netguru and our client’s teams, acting as a fully integrated contributor within the client's software organization. This is a B2B contract position. Hourly rate: up to 30 EUR/h (net, invoiced). Working hours: 14:30 to 22:30 CET (±30 minutes). Responsibilities Perform development work as part of the client’s software engineering teams Support the client’s developers in daily tasks and project work Provide assistance to the client’s customers during US working hours Monitor and resolve critical issues that arise outside of standard European hours Participate in regular team meetings and virtual team events Integrate with the client’s wider developer community Contribute to the ongoing development of the client’s SaaS solution, including: Integrating with customer ERP systems to retrieve data Analyzing data and delivering insights back to customers Building and maintaining features within the SaaS application Requirements 2–4 years of experience in backend development with Java Solid understanding of object-oriented programming and Java fundamentals Experience with Spring Boot and RESTful API design Familiarity with SQL and working with relational databases Comfortable working independently during off-standard hours Ability to communicate clearly and collaborate in distributed, international teams Professional working proficiency in English (spoken and written) Nice to Have Experience with ERP system integration Exposure to SaaS product development Familiarity with CI/CD pipelines and containerized environments Knowledge of AWS or other cloud platforms Prior experience working in customer-facing support or issue resolution Benefits In return, we offer: 100% remote, flexible work; work with an experienced team of developers and continuous development of your hard and soft skills; dev-friendly processes such as Continuous Integration, Continuous Delivery, Code Review and bug bashes; long-term collaboration on challenging products (FinTech, B2B software, E-commerce and more). What will happen next? We would like to know you better, so we will invite you for a meeting with our recruiter. Next, you'll be asked to solve the task or invited to an interview and pair programming with one of our iOS Developers. Looking for a full-time job? Check out our and find out more about our open recruitment processes. If you need any disability-related adaptation at any step of the recruitment process – simply let the recruiter know! We'd be happy to help.

🏢 Summary: Mid-level Java Developer role on a B2B contract to support and enhance an enterprise SaaS platform, working closely with distributed engineering teams. The position involves backend development, ERP integrations, data processing, and production support during US hours. Fully remote with fixed afternoon/evening CET schedule. 🗂️ Requirements: 2–4 years backend development experience with Java, Strong knowledge of OOP and Java fundamentals, Experience with Spring Boot, Experience designing RESTful APIs, Experience with SQL and relational databases, Ability to work independently during off-standard hours, Professional proficiency in English 📃 Skills: Java, Spring, SpringBoot, REST, SQL, RDBMS, OOP, ERP, CI/CD, AWS, Docker, SaaS 🏢 Description: We are looking for a Mid-level Java Developer to join our client’s engineering team and support the development of a SaaS platform used by enterprise customers. This role requires working in close collaboration with both Netguru and our client’s teams, acting as a fully integrated contributor within the client's software organization. This is a B2B contract position. Hourly rate: up to 30 EUR/h (net, invoiced). Working hours: 14:30 to 22:30 CET (±30 minutes). Responsibilities Perform development work as part of the client’s software engineering teams Support the client’s developers in daily tasks and project work Provide assistance to the client’s customers during US working hours Monitor and resolve critical issues that arise outside of standard European hours Participate in regular team meetings and virtual team events Integrate with the client’s wider developer community Contribute to the ongoing development of the client’s SaaS solution, including: Integrating with customer ERP systems to retrieve data Analyzing data and delivering insights back to customers Building and maintaining features within the SaaS application Requirements 2–4 years of experience in backend development with Java Solid understanding of object-oriented programming and Java fundamentals Experience with Spring Boot and RESTful API design Familiarity with SQL and working with relational databases Comfortable working independently during off-standard hours Ability to communicate clearly and collaborate in distributed, international teams Professional working proficiency in English (spoken and written) Nice to Have Experience with ERP system integration Exposure to SaaS product development Familiarity with CI/CD pipelines and containerized environments Knowledge of AWS or other cloud platforms Prior experience working in customer-facing support or issue resolution Benefits In return, we offer: 100% remote, flexible work; work with an experienced team of developers and continuous development of your hard and soft skills; dev-friendly processes such as Continuous Integration, Continuous Delivery, Code Review and bug bashes; long-term collaboration on challenging products (FinTech, B2B software, E-commerce and more). What will happen next? We would like to know you better, so we will invite you for a meeting with our recruiter. Next, you'll be asked to solve the task or invited to an interview and pair programming with one of our iOS Developers. Looking for a full-time job? Check out our and find out more about our open recruitment processes. If you need any disability-related adaptation at any step of the recruitment process – simply let the recruiter know! We'd be happy to help.

🏢 Summary: Senior Backend Engineer role (B2B, remote within EU) focused on designing scalable backend systems, high-performance APIs, and ETL pipelines for large-scale data processing in distributed environments. The position involves optimizing system performance, database structures, and cloud-based architectures while ensuring security, reliability, and maintainability. The offer includes long-term collaboration on complex digital products with flexible remote work and paid vacation. 🗂️ Requirements: Strong commercial experience with JVM languages (Java, Scala, or Kotlin), Experience with relational databases (PostgreSQL, MySQL), Experience with NoSQL databases (MongoDB), Hands-on experience with large datasets processing, Knowledge of scalable API design and backend architecture, Experience designing distributed, high-performance systems, Experience building ETL pipelines, Experience with cloud platforms (AWS, GCP, or Azure), Knowledge of performance optimization and low-latency systems, Experience with database optimization (indexing, schema design, tuning), Senior-level experience with mentoring capabilities, English C1 level, Must be based in the European Union 📃 Skills: Java, Scala, Kotlin, JVM, PostgreSQL, MySQL, MongoDB, ETL, AWS, GCP, Azure, SQL, NoSQL, CI, CD 🏢 Description: Description Netguru is a trusted partner in digital commerce. The company helps leading brands modernize B2B solutions, marketplaces, and retail ecosystems. Since 2008, it has empowered businesses with cutting-edge technology, AI-powered personalization, and world-class engineering and design teams. A certified B Corporation®, Netguru is trusted by major brands including IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted. Position: Senior Backend Engineer Contract: B2B – Remote (EU Only) Rate: up to 30 EUR/hour + 20 paid vacation days Language: English C1 Responsibilities Design and build scalable backend systems for processing large volumes of data Develop and maintain robust, high-performance APIs for data integration and access Build, optimize, and maintain ETL pipelines for data ingestion and transformation Process and manage large datasets in distributed environments Optimize system performance, latency, and throughput across backend services Improve database performance through indexing, schema design, and query optimization Collaborate with product managers, designers, and engineering teams to deliver scalable solutions Work closely with stakeholders to define and implement data-driven functionalities Ensure high standards of security, reliability, scalability, and maintainability Mentor and support other engineers as part of a senior-level engineering role Stay up to date with modern backend technologies, architecture patterns, and engineering best practices Requirements Strong commercial experience with JVM-based languages such as Java, Scala, or Kotlin Solid experience with relational databases, including PostgreSQL and MySQL Experience working with NoSQL databases, preferably MongoDB Hands-on experience processing and managing large datasets Strong knowledge of scalable API design and backend architecture principles Experience designing distributed and high-performance systems Practical experience building ETL pipelines using standard data processing tools Experience with cloud platforms such as AWS, GCP, or Azure Strong understanding of performance optimization and low-latency systems Experience with database optimization, including indexing, schema design, and performance tuning Strong problem-solving and communication skills Senior-level mindset with the ability to mentor and support engineering teams English at C1 level Must be based in the European Union Benefits In return, we offer: 100% remote, flexible work; work with an experienced team of developers and continuous development of your hard and soft skills; dev-friendly processes such as Continuous Integration, Continuous Delivery, Code Review and bug bashes; long-term collaboration on challenging products (FinTech, B2B software, E-commerce and more). What will happen next? We would like to know you better, so we will invite you for a meeting with our recruiter. Next, you'll be asked to solve the task or invited to an interview and pair programming with one of our iOS Developers. Looking for a full-time job? Check out our and find out more about our open recruitment processes. If you need any disability-related adaptation at any step of the recruitment process – simply let the recruiter know! We'd be happy to help.

🏢 Summary: Senior Backend Engineer (B2B, remote EU) role focused on designing and building scalable backend systems for processing large volumes of spare parts data. The position involves developing high-performance APIs, ETL pipelines, and distributed systems in cloud environments. The role also includes optimizing databases and system performance while ensuring security, scalability, and reliability. 🗂️ Requirements: Strong commercial experience with JVM languages (Java, Scala, or Kotlin), Experience with relational databases (PostgreSQL, MySQL), Experience with NoSQL databases (MongoDB), Experience processing and managing large datasets, Knowledge of scalable API design, Experience designing distributed systems, Experience building ETL pipelines, Experience with cloud platforms (AWS, GCP, or Azure), Knowledge of performance optimization and low-latency systems, Experience with database optimization (indexing, schema design, tuning), English C1 level, Based in the European Union 📃 Skills: Java, Scala, Kotlin, JVM, PostgreSQL, MySQL, MongoDB, SQL, NoSQL, ETL, AWS, GCP, Azure, APIs, DistributedSystems, Cloud, PerformanceOptimization, Indexing, SchemaDesign 🏢 Description: Description Netguru is a trusted partner in digital commerce. The company helps leading brands modernize B2B solutions, marketplaces, and retail ecosystems. Since 2008, it has empowered businesses with cutting-edge technology, AI-powered personalization, and world-class engineering and design teams. A certified B Corporation®, Netguru is trusted by major brands including IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted. Position: Senior Backend Engineer Contract: B2B – Remote (EU Only) Rate: up to 30 EUR/hour + 20 paid vacation days Language: English C1 Responsibilities Design and build scalable backend systems for processing large volumes of spare parts data Develop and maintain robust, high-performance APIs for data integration and access Build, optimize, and maintain ETL pipelines for data ingestion and transformation Process and manage large datasets in distributed environments Optimize system performance, latency, and throughput across backend services Improve database performance through indexing, schema design, and query optimization Collaborate with product managers, designers, and engineering teams to deliver scalable solutions Work closely with stakeholders to define and implement data-driven functionalities Ensure high standards of security, reliability, scalability, and maintainability Mentor and support other engineers as part of a senior-level engineering role Stay up to date with modern backend technologies, architecture patterns, and engineering best practices Requirements Tech stack & requirements Strong commercial experience with JVM-based languages such as Java, Scala, or Kotlin Solid experience with relational databases, including PostgreSQL and MySQL Experience working with NoSQL databases, preferably MongoDB Hands-on experience processing and managing large datasets Strong knowledge of scalable API design and backend architecture principles Experience designing distributed and high-performance systems Practical experience building ETL pipelines using standard data processing tools Experience with cloud platforms such as AWS, GCP, or Azure Strong understanding of performance optimization and low-latency systems Experience with database optimization, including indexing, schema design, and performance tuning Strong problem-solving and communication skills Senior-level mindset with the ability to mentor and support engineering teams English at C1 level Must be based in the European Union Benefits In return, we offer: 100% remote, flexible work; work with an experienced team of developers and continuous development of your hard and soft skills; dev-friendly processes such as Continuous Integration, Continuous Delivery, Code Review and bug bashes; long-term collaboration on challenging products (FinTech, B2B software, E-commerce and more). What will happen next? We would like to know you better, so we will invite you for a meeting with our recruiter. Next, you'll be asked to solve the task or invited to an interview and pair programming with one of our iOS Developers. Looking for a full-time job? Check out our and find out more about our open recruitment processes. If you need any disability-related adaptation at any step of the recruitment process – simply let the recruiter know! We'd be happy to help.

🏢 Summary: Senior Backend Engineer role for a long-term freelance project in the laboratory and biotech domain, working as the sole backend developer to modernize and scale legacy systems. The position focuses on backend architecture, microservices development, and integration with LIMS systems in an on-premise Kubernetes environment. The role requires close technical collaboration with laboratory stakeholders and internal teams. 🗂️ Requirements: Senior-level experience with Java, Strong architectural and problem-solving skills, Experience with Spring and Spring Boot, Experience designing and maintaining REST APIs, Knowledge of SOAP services, Experience in microservices environments, Practical experience with Kubernetes, Experience integrating LIMS systems, Experience with refactoring and legacy code modernization, Ability to work independently as sole backend engineer, EU-based residency, English C1 level 📃 Skills: Java, Spring, SpringBoot, REST, SOAP, Microservices, Kubernetes, LIMS, Architecture, Refactoring, Integration 🏢 Description: Description Netguru is a trusted partner in digital commerce. The company helps leading brands modernize B2B solutions, marketplaces, and retail ecosystems. Since 2008, it has empowered businesses with cutting-edge technology, AI-powered personalization, and world-class engineering and design teams. A certified B Corporation®, Netguru is trusted by major brands including IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted. We are looking for a Senior Backend Engineer with strong architectural skills to join a long-term project for a European client in the laboratory and biotech domain. This is a single-developer project , where you will work closely with the client's internal teams and laboratory stakeholders to clarify requirements, define scope, and improve existing backend processes. Strong communication skills are essential, as you will regularly attend technical discussions with LIMS and laboratory teams. The role involves hands-on development, refactoring legacy code, and contributing to a scalable and well-structured backend architecture. You must be based in the EU due to client requirements. Position: Senior Backend Engineer (Java / Architecture) Contract: Freelance / B2B – Remote (EU Only) Rate: 36–50 EUR/hour Language: English C1 Responsibilities Work independently as the sole backend engineer on the project Refactor and modernize legacy backend systems Improve and extend existing microservices and backend integrations Maintain and develop REST and SOAP interfaces Communicate with laboratory teams and LIMS stakeholders to define requirements Ensure stable operation of backend services in an on-premise Kubernetes environment Collaborate with internal client teams to maintain architectural consistency Requirements Tech stack & requirements Senior-level experience with Java (Spring / Spring Boot) Strong architectural and problem-solving skills Experience designing and maintaining REST APIs Knowledge of SOAP services Background in microservices environments Practical experience with Kubernetes (on-premise setups preferred) Experience working with or integrating LIMS systems Solid understanding of refactoring and legacy code modernization Excellent communication skills for direct cooperation with laboratory stakeholders English at C1 level Must be based in the European Union Benefits In return, we offer: 100% remote, flexible work; work with an experienced team of developers and continuous development of your hard and soft skills; dev-friendly processes such as Continuous Integration, Continuous Delivery, Code Review and bug bashes; long-term collaboration on challenging products (FinTech, B2B software, E-commerce and more). What will happen next? We would like to know you better, so we will invite you for a meeting with our recruiter. Next, you'll be asked to solve the task or invited to an interview and pair programming with one of our iOS Developers. Looking for a full-time job? Check out our and find out more about our open recruitment processes. If you need any disability-related adaptation at any step of the recruitment process – simply let the recruiter know! We'd be happy to help.

🏢 Summary: Offer for a Backend Kotlin Engineer to work full-time on a long-term remote project within CET hours, building backend solutions in event-driven architectures. The role involves developing and maintaining Kotlin-based services, collaborating with DevOps, and working in CI/CD-driven environments. The project duration is at least 6 months with potential for extended collaboration. 🗂️ Requirements: Good command of written and spoken English, Location within European Union, Commercial experience with Kotlin, Experience with Kubernetes, Experience with event-driven architectures, Experience with Kafka, Experience with CI/CD for backend and mobile applications, Experience in DevOps collaboration, Understanding of certification and compliance processes 📃 Skills: Kotlin, Kubernetes, Kafka, CI/CD, DevOps, English 🏢 Description: Description Netguru is a trusted partner in digital commerce. The company helps leading brands modernize B2B solutions, marketplaces, and retail ecosystems. Since 2008, it has empowered businesses with cutting-edge technology, AI-powered personalization, and world-class engineering and design teams. A certified B Corporation®, Netguru is trusted by major brands including IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted. How freelancing works at Netguru? As a , you can choose what works well for you. You decide when, where, and how you work on projects and tasks. We match you with work that fits your skills. Plus, you have access to various opportunities across different industries and companies. That means you will not only gain more experience, but also develop various skills. But there's more. Netguru freelancers can benefit from full-time collaboration and really be a part of the team. So, are you ready to make an impact? Join Netguru, and let's build beautiful software together. Currently we are looking for a Backend Kotlin Engineer Salary range (Regular): from 70 PLN/h Engagement: fulltime Working Hours: CET Start date: around mid July 2026 Project duration: minimum 6 months Requirements Good command of written and spoken English. Located in European Union Kotlin Kubernetes Event-driven systems (Kafka) CI/CD for mobile and backend applications DevOps collaboration Certification and compliance processes Benefits In return, we offer: 100% remote, flexible work. Work with an experienced team of developers and continuous development of your hard and soft skills. Dev-friendly processes such as Continuous Integration, Continuous Delivery, Code Review and bug bashes. Long-term collaboration on challenging products (FinTech, B2B software, E-commerce and more). Here's what you can expect from the recruitment process: First, you'll meet with one of our recruiters to get to know each other better. If everything goes well, you'll have the opportunity to meet with the client during online interviews. Don't hesitate and apply right away! At Netguru, we're committed to creating an inclusive environment for everyone. If you require any disability-related adaptations during the recruitment process, please let us know. We're here to help!

🏢 Summary: Long-term remote Frontend Developer contract focused on building and maintaining customer-facing web applications using ReactJS and TypeScript. The role involves collaboration with cross-functional teams in Agile environments and contributing to scalable B2B and e-commerce products. 🗂️ Requirements: English B2+, 3+ years commercial experience, TypeScript, ReactJS, Customer-facing web applications, Monitoring tools, Observability tools, Software testing, Clean architecture, Code quality standards, Agile, Cross-functional collaboration, Problem-solving 📃 Skills: TypeScript, ReactJS, JavaScript, HTML, CSS, Agile, CI, CD, Testing, Monitoring, Observability 🏢 Description: Description Netguru is a trusted partner in digital commerce. The company helps leading brands modernize B2B solutions, marketplaces, and retail ecosystems. Since 2008, it has empowered businesses with cutting-edge technology, AI-powered personalization, and world-class engineering and design teams. A certified B Corporation®, Netguru is trusted by major brands including IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted. How freelancing works at Netguru? As a , you can choose what works well for you. You decide when, where, and how you work on projects and tasks. We match you with work that fits your skills. Plus, you have access to various opportunities across different industries and companies. That means you will not only gain more experience, but also develop various skills. But there's more. Netguru freelancers can benefit from full-time collaboration and really be a part of the team. So, are you ready to make an impact? Join Netguru, and let's build beautiful software together. Currently we are looking for a Frontend Developer. Salary range: 30 EUR/h Engagement: fulltime Working Hours: CET Location: European Union Start date: July 2026 Project duration: long term - at least a year Requirements Good command of written and spoken English (B2+). 3+ years of proven commercial experience Proven experience with modern frontend technologies, particularly TypeScript and ReactJS. Hands-on experience developing and maintaining customer-facing web applications. Familiarity with monitoring and observability tools used in production environments and distributed systems. Strong understanding of software testing practices, clean architecture principles, and code quality standards. Experience working within Agile development frameworks and contributing to cross-functional product teams. Demonstrated ability to collaborate effectively with backend engineers, Product Managers, and UX/UI designers. Strong problem-solving skills and a commitment to delivering high-quality, scalable solutions. Nice to have Experience with B2B SaaS products Startup / scaleup engineering environments Experience building scalable customer-facing applications Remote / international cross-functional collaboration Strong product collaboration (Design + PM + Backend) Benefits In return, we offer: 100% remote, flexible work. Work with an experienced team of developers and continuous development of your hard and soft skills. Dev-friendly processes such as Continuous Integration, Continuous Delivery, Code Review and bug bashes. Long-term collaboration on challenging products (FinTech, B2B software, E-commerce and more). Here's what you can expect from the recruitment process: First, you'll meet with one of our recruiters to get to know each other better. If everything goes well, you'll have the opportunity to meet with the client during online interviews. Don't hesitate and apply right away! At Netguru, we're committed to creating an inclusive environment for everyone. If you require any disability-related adaptations during the recruitment process, please let us know. We're here to help!

🏢 Summary: Remote Fullstack Java Developer role for a mission-critical trading platform, focused on building new features and enhancing existing distributed systems. The position involves full lifecycle development, performance optimization, and post-production support in collaboration with a US-based team. 🗂️ Requirements: Bachelor’s or Master’s degree in Computer Science or related field, 5–10 years of experience as Fullstack Developer, Strong knowledge of Java programming, Strong knowledge of algorithms and data structures, Experience with concurrency and multithreading, Experience with distributed systems, Experience with SQL and relational databases, Experience with NoSQL databases, Experience with high-speed messaging systems, Experience with UNIX or Linux systems 📃 Skills: Java, Nodejs, Angular, SpringBoot, JavaScript, HTML, CSS, JSON, Kafka, Tibco, Tervela, Redis, Cassandra, Oracle, SQL, PLSQL, Tomcat, WebLogic, WebSphere, Unix, Linux, NoSQL, Concurrency, Multithreading, Algorithms, DataStructures 🏢 Description: We are looking for a Fullstack Java Developer to join remotely one of the project for our American client from trading sector. We offer: Salary range: 45-55 USD/h on B2B +VAT without paid vacations depending on the experience, and technical testing 100% Remote job Working hours: Starting from 12:00 or ideally from 2 PM CET to have the overlap with the US team in the Eastern Time zone (especially during the onboarding process) Description of the Position: Perform software development and programming to create new features and enhance functionality on a mission critical platform. Adapt and extend existing re-usable components and libraries. Develop high quality software while meeting deadlines. Assist with rollout and post production support. Present ideas for system improvements. Design or upgrade existing software to ensure product performance and quality expectations are met. Job Responsibilities: ·       Creating new features and enhancing functionality on a mission critical platform ·       Adapts and extend existing re-usable components and libraries. ·       Develops high quality software while meeting deadlines ·       Presents ideas for system improvements ·       Design or upgrade an existing software to ensure product performance and quality expectations are met · Assists with rollout and post production support Required Qualifications: ·       Master’s or Bachelor's degree in Computer Science or related discipline ·       5-10 years of working experience as a full-stack developer, distributed systems experience is a plus ·       Excellent written and verbal communication skills ·       Strong ability to interpret business requirements ·       Must be a creative problem solver ·       Must demonstrate strong knowledge of algorithms, data structures, concurrency, and java programming Additional Preferred Experience: ·       Java, Nodejs, Angular, Spring Boot, JavaScript, HTML, CSS, JSON ·       Multi-threaded programming ·       Experience with algorithms, data structures, and concurrency ·       Kafka, Tibco Rendezvous, Tervela, or similar high-speed messaging system ·       Experience with distributed database systems like Redis, Cassandra or any other NoSQL database ·       Oracle PL/SQL programming, Proficiency in SQL ·       Tomcat, WebLogic, or WebSphere ·  UNIX / Linux operating systems ·  Experience with financial transaction systems ·  Basic knowledge of the fixed income and financial markets is a plus. ·  Excellent written and verbal communication skills ·  Strong ability to interpret business requirements ·  Must be a creative problem solver and should have good analytical thinking. This role isn't for you, but you have a friend who would be a good fit? Refer them and earn up to 5,000 PLN. Referral Program: Talent from your network

🏢 Summary: Backend Java Engineer role focused on developing and modernizing a high-load B2B gaming back-office platform processing millions of real-time transactions daily. The position involves building new features, improving scalability and reliability, and evolving a monolithic system toward distributed services. You will contribute to architectural design, performance optimization, and production issue resolution. 🗂️ Requirements: 5+ years of Java development experience, Strong knowledge of backend architecture, Experience with distributed systems, Experience with relational databases and SQL, Experience with message-driven systems, Experience refactoring production systems, Strong debugging and problem-solving skills, Intermediate English or higher 📃 Skills: Java, Spring, MSSQL, SQL, Kafka, Redis, Microservices 🏢 Description: Role Overview: We are looking for an experienced Java Engineer to join the client's backend team, which is working on the back-office platform of a high-load B2B gaming system. Their platform processes millions of transactions daily and supports real-time operations for multiple partners. As the system continues to grow, the engineering team is expanding to improve scalability, performance, and reliability, while gradually evolving parts of the platform from a monolithic architecture toward distributed services. You will work on both new functionality and architectural improvements, helping modernise critical parts of the platform. Technology Stack: Java 8 / Java 17, Spring Framework, MSSQL 2019, Kafka, Redis, distributed services with parts of the system still evolving from a monolithic architecture. Key Responsibilities: Develop new backend functionality for the platform; Improve system performance, scalability, and reliability; Participate in refactoring and modernisation of legacy components; Contribute to architectural discussions and technical design; Investigate and resolve production issues; Assess technical feasibility and complexity of business requirements; Collaborate closely with backend engineers, technical leads, and product teams Required Skills & Experience: 5+ years of Java development experience; Strong understanding of backend architecture and distributed systems; Experience working with relational databases and SQL; Familiarity with message-driven systems (Kafka or similar); Experience in improving or refactoring existing production systems; Strong problem-solving and debugging skills; Comfortable working in collaborative environments with code reviews and shared ownership of the codebase; English level: Intermediate or higher. The company guarantees you the following benefits: Global Collaboration: Join an international team where everyone treats each other with respect and moves towards the same goal; Autonomy and Responsibility: Enjoy the freedom and responsibility to make decisions without the need for constant supervision; Competitive Compensation: Receive competitive salaries reflective of your expertise and knowledge as our partner seeks top performers; Remote Work Opportunities: Embrace the flexibility of fully remote work, with the option to visit company offices that align with your current location; Flexible Work Schedule: Focus on performance, not hours, with a flexible work schedule that promotes a results-oriented approach; Unlimited Paid Time Off: Prioritise work-life balance with unlimited paid vacation and sick leave days to prevent burnout; Career Development: Access continuous learning and career development opportunities to enhance your professional growth; Corporate Culture: Experience a vibrant corporate atmosphere with exciting parties and team-building events throughout the year; Referral Bonuses: Refer talented friends and receive a bonus after they successfully complete their probation period; Medical Insurance Support: Choose the right private medical insurance and receive compensation (full or partial) based on the cost; Flexible Benefits: Customise your compensation by selecting activities or expenses you'd like the company to cover, such as a gym subscription, language courses, Netflix subscription, spa days, and more; Education Foundation: Participate in a biannual raffle for a chance to learn something new unrelated to your job as part of your commitment to ongoing education. Interview process: HR Interview with the Recruiter; Technical interview with the team; A 2-hour Final interview with the team. If you find this opportunity right for you, don't hesitate to apply or get in touch with us if you have any questions!

🏢 Summary: Full-time remote Frontend Developer role focused on building and optimizing modern web applications using ClojureScript in a 6-month project. The position involves functional programming, advanced state management, and integration with external libraries in a collaborative, CI/CD-driven environment. The role requires strong frontend engineering skills and performance-oriented development. 🗂️ Requirements: Native Polish or Polish at least B2+, English at least B2, Experience with ClojureScript, Knowledge of functional programming principles, Experience with re-frame and Reagent, Experience with EDN and Transit formats, Experience with clojure.spec for data validation, Experience with JavaScript interop and NPM integration, Experience with shadow-cljs or Leiningen, Experience with REPL-driven development, Experience with React rendering performance optimization, Experience with automated testing using cljs.test 📃 Skills: ClojureScript, re-frame, Reagent, EDN, Transit, clojure.spec, JavaScript, NPM, shadow-cljs, Leiningen, REPL, React, cljs.test, CI, CD 🏢 Description: Description Netguru is a trusted partner in digital commerce. The company helps leading brands modernize B2B solutions, marketplaces, and retail ecosystems. Since 2008, it has empowered businesses with cutting-edge technology, AI-powered personalization, and world-class engineering and design teams. A certified B Corporation®, Netguru is trusted by major brands including IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted. How freelancing works at Netguru? As a , you can choose what works well for you. You decide when, where, and how you work on projects and tasks. We match you with work that fits your skills. Plus, you have access to various opportunities across different industries and companies. That means you will not only gain more experience, but also develop various skills. But there's more. Netguru freelancers can benefit from full-time collaboration and really be a part of the team. So, are you ready to make an impact? Join Netguru, and let's build beautiful software together. Currently we are looking for a Frontend Developer. Salary range: up to 35€/h Engagement: fulltime Working Hours: 9-17CET Start date: 12.06.2026 Project duration: 6 months Requirements Are native Polish-speaker or have a good command of written and spoken Polish (at least B2+). Have a good command of written and spoken English (at least B2). Core: ClojureScript and functional programming principles (immutability, pure functions). State Management: Proficient in re-frame (Events, Subscriptions, Co-effects) and Reagent. Data & API: Expertise in EDN and Transit formats; data validation using clojure.spec. Interop: Hands-on experience with JS Interop and seamless integration of external NPM libraries. Tooling: Skilled in shadow-cljs (or Leiningen) and REPL-driven development. Engineering: React rendering performance optimization and automated testing with cljs.test. Benefits In return, we offer: 100% remote, flexible work. Work with an experienced team of developers and continuous development of your hard and soft skills. Dev-friendly processes such as Continuous Integration, Continuous Delivery, Code Review and bug bashes. Long-term collaboration on challenging products (FinTech, B2B software, E-commerce and more). Here's what you can expect from the recruitment process: First, you'll meet with one of our recruiters to get to know each other better. If everything goes well, you'll have the opportunity to meet with the client during online interviews. Don't hesitate and apply right away! At Netguru, we're committed to creating an inclusive environment for everyone. If you require any disability-related adaptations during the recruitment process, please let us know. We're here to help!