Interim IT / Software Development Lead

🏢 Summary: Full Stack role in a global reporting project within banking, focused on building and migrating large-scale web applications to Google Cloud Platform. The position involves developing microservices-based systems handling high volumes of financial data, with a 50/50 split between backend (Java) and frontend (React). The role includes designing, implementing and deploying scalable reporting solutions in a DevOps environment. 🗂️ Requirements: Experience delivering large-scale web applications as Full Stack developer, Experience with microservices architecture and distributed systems, Strong knowledge of Java 17+, Experience with Spring and Spring Boot, Experience building RESTful APIs, Strong knowledge of ReactJS, Strong knowledge of JavaScript and TypeScript, Experience with Google Cloud Platform, Experience with PostgreSQL, BigQuery or AlloyDB, Experience with Git and GitHub, Understanding of CI/CD processes and Jenkins, Experience with end-to-end impact analysis and technical design documentation 📃 Skills: Java, Spring, SpringBoot, REST, ReactJS, JavaScript, TypeScript, PostgreSQL, BigQuery, AlloyDB, GCP, Git, GitHub, Jenkins, Microservices 🏢 Description: O projekcie Dołączysz do zespołu rozwijającego globalne aplikacje raportowe , wspierające podejmowanie decyzji biznesowych i transformacyjnych w bankowości. Projekt obejmuje zarówno migrację istniejących rozwiązań raportowych do chmury (GCP) , jak i budowę nowych aplikacji webowych od podstaw . Systemy działają w architekturze mikroserwisowej i obsługują duże wolumeny danych związanych z finansami, planowaniem zasobów, monitorowaniem projektów oraz stabilnością usług. Pracujemy w międzynarodowym, rozproszonym zespole , w duchu Agile i DevOps Stack technologiczny: Java 17+, Spring, Spring Boot, REST APIs, ReactJS, JavaScript, TypeScript, PostgreSQL, BigQuery, AlloyDB, Apache ECharts, Jenkins, Git/GitHub, Google Cloud Platform, mikroserwisy Full-stack – podział pracy: około 50% backend, 50% frontend (w praktyce może być więcej frontendu), rola daje realny wpływ na kierunek technologiczny zespołu i możliwość mentoringu młodszych członków zespołu. Lokalizacja: praca hybrydowa – minimum 2 razy w tygodniu z biura w Krakowie. Twoje zadania Projektowanie, rozwój, testowanie i wdrażanie aplikacji webowych w architekturze mikroserwisowej Migracja istniejących rozwiązań raportowych do chmury Tworzenie i rozwój nowych funkcjonalności aplikacji raportowych Analiza wpływu zmian end-to-end oraz przygotowywanie dokumentacji projektowej Wsparcie zespołu poprzez mentoring i dzielenie się wiedzą Współpraca w międzynarodowym, rozproszonym środowisku Utrzymanie standardów technologicznych i bezpieczeństwa informacji Wymagania Doświadczenie w dostarczaniu dużych aplikacji webowych w roli Full Stack – umiejętność pracy zarówno nad backendem, jak i frontendem w projektach o dużej skali i złożoności. Doświadczenie z architekturą mikroserwisową – projektowanie i rozwój systemów rozproszonych, w tym komunikacja między usługami i utrzymanie spójności danych Bardzo dobra znajomość Java (preferowane 17+) – tworzenie stabilnych i skalowalnych usług backendowych. Spring / Spring Boot oraz RESTful APIs – rozwój mikrousług i integracja komponentów systemu. Bardzo dobra znajomość ReactJS, JavaScript i TypeScript – budowa nowoczesnych, interaktywnych interfejsów użytkownika. Doświadczenie z Google Cloud Platform – wdrażanie aplikacji i zarządzanie środowiskiem chmurowym. Doświadczenie z relacyjnymi bazami danych i/lub hurtowniami danych (PostgreSQL, BigQuery, AlloyDB) – optymalizacja zapytań i przetwarzanie dużych wolumenów danych. Doświadczenie z Git i systemami SCM (GitHub) – wersjonowanie kodu, współpraca w zespole i utrzymanie spójności workflow. Doświadczenie w analizie wpływu zmian end-to-end oraz tworzeniu high-level i low-level designów – projektowanie zmian w sposób przemyślany i spójny. Zrozumienie procesów CI/CD (np. Jenkins) – wspieranie automatyzacji wdrożeń i utrzymania jakości kodu. Umiejętność dzielenia się wiedzą i mentoringu zespołu – współpraca z innymi członkami zespołu i rozwój ich kompetencji. Mile widziane Doświadczenie z wizualizacją danych (np. Apache ECharts) – tworzenie interaktywnych raportów i dashboardów wspierających podejmowanie decyzji biznesowych. Dlaczego warto Realny wpływ na decyzje biznesowe poprzez raportowanie i analizę danych Praca z dużą skalą danych i użytkowników w międzynarodowym środowisku Możliwość migracji systemów raportowych do chmury i modernizacji architektury Nowoczesny stack technologiczny i środowisko DevOps Możliwość mentoringu i rozwijania kompetencji w zespole Długofalowy projekt z możliwością rozwoju technicznego i biznesowego

🏢 Summary: Offer for a Full Stack Developer / Platform Engineer responsible for designing, developing, deploying, and maintaining modern applications and infrastructure environments. The role covers full application lifecycle management, including backend and frontend development, AI/ML solutions, containerization, Kubernetes administration, CI/CD, and production support. The position combines software engineering with infrastructure, networking, and monitoring responsibilities. 🗂️ Requirements: Very good knowledge of Python, JavaScript, TypeScript, Java, Experience with FastAPI and Flask, Experience with React.js and Node.js, Experience in AI, Machine Learning, Computer Vision, Experience with Docker and Docker Compose, Experience with Kubernetes administration, Experience with CI/CD and GitLab, Knowledge of PostgreSQL, Experience with Kafka, RabbitMQ or MQTT, Very good knowledge of Linux, Knowledge of networking concepts, Experience with MikroTik, Dell, Cisco, Knowledge of Zabbix, Ability to diagnose performance and environment issues, Knowledge of storage solutions QNAP, QSAN, Dell 📃 Skills: Python, JavaScript, TypeScript, Java, FastAPI, Flask, React, Node.js, Docker, Kubernetes, GitLab, CI/CD, PostgreSQL, Kafka, RabbitMQ, MQTT, Linux, Zabbix, AI, ML, LLM, ComputerVision, REST, DNS, MikroTik, Dell, Cisco, QNAP, QSAN 🏢 Description: Do naszego zespołu poszukujemy doświadczonej osoby na stanowisko: Full Stack Developer / Platform Engineer, która będzie odpowiedzialna za projektowanie, rozwój, wdrażanie oraz utrzymanie nowoczesnych systemów aplikacyjnych i środowisk infrastrukturalnych. Jest to rola dla osoby, która swobodnie porusza się zarówno w obszarze developmentu, jak infrastruktury. Szukamy kandydata, który potrafi samodzielnie budować aplikacje, rozwijać integracje, projektować architekturę usług, wdrażać je w środowiskach kontenerowych oraz utrzymywać pełny cykl życia aplikacji— od kodu, przez CI/CD, po monitoring, diagnostykę i utrzymanie produkcyjne. Python, FastAPI, Flask, React.js, Node.js, Docker, Kubernetes, GitLab CI/CD, PostgreSQL, Kafka / RabbitMQ /MQTT, Linux, AI / ML / CV, JAVA Development aplikacji i integracji: Projektowanie i rozwój aplikacji backendowych w Node.js / JAVA / Python (FastAPI, Flask) Rozwój aplikacji frontendowych z wykorzystaniem JavaScript / TypeScript oraz React.js. Projektowanie i rozwój REST API oraz integracji między systemami. Implementacja rozwiązań wykorzystujących AI / Machine Learning / LLM. Tworzenie i rozwój komponentów z obszaru Computer Vision, analizy obrazu oraz przetwarzania danych. Konteneryzacja i Kubernetes: Budowa, konteneryzacja i uruchamianie aplikacji z wykorzystaniem Docker oraz Docker Compose. Projektowanie, wdrażanie i administracja środowisk opartych o Kubernetes. Utrzymanie pełnego cyklu życia aplikacji uruchamianych w klastrach Kubernetes. Utrzymanie oraz diagnostyka podów, namespace’ów i workloadów. Analiza problemów wydajnościowych oraz błędów środowiskowych. Zapewnienie wysokiej dostępności i ciągłości działania usług. CI/CD, monitoring i utrzymanie: Projektowanie, rozwój i utrzymanie procesów CI/CD. Przygotowywanie oraz utrzymanie pipeline’ów wdrożeniowych w oparciu o GitLab / GitLab CI/CD. Automatyzacja buildów, testów, deploymentów i procesów utrzymaniowych. Monitoring środowisk developerskich, testowych i produkcyjnych. Wdrażanie i utrzymanie systemów monitoringu, logowania i alertingu (np. Zabbix). Administracja bazami danych PostgreSQL. Komunikacja, Linux i infrastruktura: Integracja komunikacji asynchronicznej (Kafka, RabbitMQ, MQTT). Administracja systemami Linux. Przygotowanie i utrzymanie środowisk serwerowych i kontenerowych. Diagnostyka sieci (DNS, routing, dostępność usług). Obsługa infrastruktury MikroTik, Dell, Cisco. Integracja i utrzymanie storage (QNAP, QSAN, Dell). Wymagania obowiązkowe: Bardzo dobra znajomość Python / JavaScript / TypeScript / JAVA. Doświadczenie z FastAPI i Flask. Doświadczenie w AI, Machine Learning i Computer Vision. Doświadczenie z React.js i Node.js. Bardzo dobra znajomość Linux. Doświadczenie z Docker, Docker Compose i Kubernetes. Doświadczenie w CI/CD i GitLab. Znajomość PostgreSQL. Doświadczenie z Kafka, RabbitMQ, MQTT. Znajomość zagadnień sieciowych. Doświadczenie z MikroTik, Dell, Cisco. Znajomość Zabbix. Umiejętność diagnozowania problemów. Znajomość storage (QNAP, QSAN, Dell). Mile widziane: Flutter, aplikacje mobilne, monitoring/observability, automatyzacja infrastruktury, mikroserwisy.

🏢 Summary: Senior Full Stack Developer role focused on modernizing a large-scale corporate banking platform through legacy transformation into a modern API-driven and microservices-based architecture. The position involves backend development with Java and Spring, frontend work with Angular, enterprise integrations, and collaboration within an international Agile team. The offer includes a long-term high-impact project with complex engineering challenges and modern architecture practices. 🗂️ Requirements: Professional experience with Java, Commercial experience with Angular, Experience with Spring Framework, Experience with Spring Boot, Experience with Hibernate, Experience designing REST APIs, Knowledge of Microservices Architecture, Good SQL knowledge, Experience with Jasmine, Familiarity with Git, English communication skills, Experience working in Agile environments 📃 Skills: Java, Angular, Spring, SpringBoot, Hibernate, REST, Microservices, SQL, Jasmine, Git, JUnit, Cucumber, WebFlux, Reactor, DDD 🏢 Description: Join a long-term digital transformation project! We are looking for an experienced Senior Full Stack Developer to join an international team working on the modernization of a large-scale corporate banking platform. This is an excellent opportunity to contribute to the transformation of a legacy system into a modern, API-driven architecture while collaborating with highly skilled professionals in an Agile environment. Location Hybrid model (3 days per week in the office) Office locations: Warsaw (preferred) Gdańsk Gdynia Your responsibilities Design, develop, and maintain REST APIs using Java and Spring Build and enhance backend services based on microservices and monolithic architecture Participate in a large-scale legacy modernization initiative Develop integrations between multiple enterprise systems Contribute to frontend development using Angular Write and maintain unit tests (JUnit & Jasmine) Support BDD testing using Cucumber Perform code reviews and ensure high code quality Work with SQL databases, including query optimization and schema design Collaborate closely with developers, architects, business stakeholders, and QA teams Participate in Agile ceremonies (SAFe framework) Prepare technical documentation for APIs and solutions Required skills Strong commercial experience with Java Experience with Angular Hands-on knowledge of Spring Framework / Spring Boot / Hibernate Experience designing and developing REST APIs Solid understanding of Microservices Architecture Good knowledge of SQL Experience with Jasmine Familiarity with Git Nice to have Experience with Reactive Programming (WebFlux, Project Reactor) Knowledge of Domain-Driven Design (DDD) Experience with Hexagonal (Ports & Adapters) Architecture Experience with Cucumber / BDD Knowledge of SOLID principles and design patterns What you'll work on Modernizing a mission-critical enterprise platform Building modern APIs for corporate banking services Refactoring business logic from a monolithic application into microservices Working in an international team using English as the primary communication language Delivering solutions within a SAFe Agile environment What we offer Long-term project with high business impact Opportunity to work on large-scale system modernization rather than pure maintenance Challenging technical environment focused on modern architecture and best engineering practices International, collaborative team Professional growth through complex engineering challenges Requirements Professional experience developing enterprise applications with Java Experience working with Angular in commercial projects Strong communication skills in English Ability to work effectively in an Agile environment

🏢 Summary: Senior Full Stack Developer role focused on building scalable, secure cloud-native applications across the full stack. The position involves backend and frontend development, as well as deploying and managing solutions on Microsoft Azure using containerization technologies. Hybrid work model with 3 days per week on-site in Wroclaw. 🗂️ Requirements: Expert-level experience in at least 3 of: Java, Python, Hands-on experience with Azure, Hands-on experience with Kubernetes, Hands-on experience with TypeScript, Hands-on experience with React, Hands-on experience with Rust or Node.js, Extensive experience with Microsoft Azure cloud platform, Strong proficiency in multiple programming languages and frameworks, Experience working in agile development environments 📃 Skills: Java, Python, Rust, Node.js, React, TypeScript, Azure, Kubernetes, Cloud, DevOps 🏢 Description: We are seeking a versatile and experienced Senior Full Stack Developer to join our dynamic team working on cutting-edge cloud-native applications. This role involves developing scalable, secure, and high-performance solutions using modern technologies across the full technology stack. You will work on innovative projects that leverage cloud platforms and containerization technologies to deliver exceptional user experiences Our client is a leading technology company focused on building next-generation digital solutions. They are committed to innovation and excellence in delivering cloud-based applications that serve millions of users worldwide. This role offers a hybrid model with 3 days per week working from the client's office in Wroclaw, Poland Ready to launch your career in cloud engineering? Apply now and join our global team. Responsibilities Design and develop robust backend services using Java, Python, Rust or Node.js Build responsive and intuitive front-end interfaces with React and TypeScript Architect and deploy cloud-native applications on the Microsoft Azure platform Manage infrastructure as code using Terraform and modern DevOps practices Orchestrate and maintain containerized applications with Kubernetes Collaborate with cross-functional teams to deliver comprehensive end-to-end solutions Requirements Expert-level experience in at least 3 of the following technologies: Java and/or Python Hands-on experience with: Azure, Kubernetes, TypeScript, React, Rust, Node.js Strong proficiency in multiple programming languages and frameworks Extensive experience with cloud platforms, particularly Microsoft Azure Proven ability to work effectively in fast-paced agile development environments Strong problem-solving skills and attention to detail Excellent communication and collaboration abilities Nice to have Experience with infrastructure as code tools like Terraform Knowledge of DevOps practices and CI/CD pipelines Understanding of microservices architecture patterns Experience with containerization and orchestration technologies Familiarity with modern software development methodologies and best practices Previous experience working in cross-functional international teams We offer/Benefits We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Long-term opportunity for a Full-Stack Java Developer to modernize a business-critical Collateral & Margining platform within a global investment banking environment. The role focuses on building and maintaining Java-based microservices while contributing to a transformation from monolithic systems to a cloud-native architecture. You will work across the full SDLC using modern Agile, DevOps, and automated testing practices. 🗂️ Requirements: Strong experience with Java 17/21, Hands-on experience with Spring Boot and microservices architecture, Solid knowledge of PostgreSQL, Experience with DevSecOps pipelines, Experience working in Agile and DevOps environments, Strong TDD practice using JUnit and integration testing, Experience with Cucumber for E2E testing, Experience delivering complex systems to production, Experience with REST APIs and messaging systems 📃 Skills: Java, Spring, SpringBoot, SpringCloud, Angular, TypeScript, PostgreSQL, Microservices, REST, MQ, Solace, Ansible, JUnit, Cucumber, DevSecOps, CICD, Redis, Hazelcast, Coherence, GCP, AWS, Hystrix, Eureka, Zuul, Sleuth, Feign, Ribbon, HTML5, GitHubCopilot 🏢 Description: Full‑Stack Java Developer – Global Investment Banking Platform (Kraków) B2B| Krakow | Hybrid: 6 days per month A global investment bank is expanding its engineering hub in Kraków and is looking for an experienced Senior and Mid Level Full‑Stack Java Developer’s to join a long‑term programme modernising a business‑critical Collateral & Margining platform used across global markets. This is a chance to join a mature engineering organisation driving a multi‑year transformation from monolithic systems to a modern, microservices‑based architecture. You’ll work on high‑impact technology used by thousands of institutional clients worldwide, while contributing to a brand‑new platform built with the latest open‑source tooling. About the Team & Platform The Collateral technology group delivers end‑to‑end solutions for a cross‑asset trading and risk environment. The team is currently: Supporting a large‑scale, business‑critical monolithic platform Building a new microservices‑based collateral platform using modern engineering practices Accelerating adoption of Agile, DevOps, AI‑assisted development, CI/CD, and cloud-native tooling Tech stack includes: Java 17/21, Spring Boot 3.5, Spring 6, Spring Cloud, Angular 17, TypeScript, REST APIs, Message Queues, Ansible, and modern open‑source infrastructure. Role Overview As a Senior Full‑Stack Java Developer, you will: Design, build, and maintain high‑quality Java microservices Contribute across the full SDLC, from design to production support Apply Agile and DevOps principles to improve delivery velocity Use TDD (JUnit), integration tests, regression tests, and Cucumber for E2E scenarios Collaborate closely with QA, product, and architecture teams Mentor junior engineers and support knowledge‑sharing across the team Support production systems: incident resolution, monitoring, and problem management Build automation and tooling to improve operational efficiency Essential Experience Strong experience with Java 17/21, Spring Boot, and microservices Solid knowledge of PostgreSQL and DevSecOps pipelines Experience working in Agile and/or DevOps environments Strong communication skills and ability to collaborate across global teams Proven experience delivering complex systems from concept to production Ability to translate functional requirements into scalable technical solutions Strong TDD discipline (JUnit, integration tests, Cucumber) Desirable Skills Experience with AI‑assisted development tools (e.g., GitHub Copilot) Spring Cloud components (Hystrix, Eureka, Zuul, Sleuth, Feign, Ribbon) Distributed caching/in‑memory data stores (Redis, Hazelcast, Coherence) REST APIs and messaging (MQ, Solace) Automated deployment tools (Ansible) TypeScript, Angular, HTML5 Cloud exposure (GCP/AWS) Why Join? Work on a mission‑critical global banking platform Contribute to a major multi‑year transformation Join a stable, established engineering organisation with modern practices Influence architecture, tooling, and engineering standards Long‑term project with strong investment and roadmap clarity

🏢 Summary: Senior Java Software Engineer role focused on building and modernizing cloud-native platforms that connect trading systems with operations and regulatory applications within a global investment banking environment. The position involves developing scalable data processing and streaming solutions as part of a multiyear cloud transformation initiative. You will work in agile teams to migrate legacy systems and implement robust CI/CD-driven delivery pipelines. 🗂️ Requirements: Bachelor's degree in Computer Science or relevant technical certification, Strong proficiency in Java and object-oriented design, Hands-on experience with Apache Spark, Proficiency in Python, Experience with CI/CD pipelines and DevOps tools, Practical knowledge of TDD, Experience with cloud platforms (Azure, AWS, or GCP), Understanding of software design principles and patterns, Experience with agile development methodologies 📃 Skills: Java, Python, Apache, Spark, Azure, AWS, GCP, CI/CD, Azure, DevOps, GitHub, GitLab, TDD, Cloud, Databricks, Kubernetes 🏢 Description: For our client, a leading global investment banking institution, we are looking for a Senior Java Software Engineer who will be instrumental in transforming critical financial operations infrastructure. You'll work within an agile team to develop and deliver the strategic backbone that connects trading systems with operations and regulatory platforms, forming a cornerstone of the organization's digital transformation initiative. Our client operates in the investment banking and financial services domain, specifically focusing on digital operations transformation within regulatory and data management systems. This project is part of a multiyear strategic roadmap to migrate and leverage cloud technology to outperform existing technology stacks. The initiative plays a crucial role in enabling the investment bank to meet regulatory obligations while creating value from extensive financial data assets. You'll be part of the Digital Operations technology stream, working in small, autonomous agile teams that are empowered to respond to client demands while continuously improving the delivery experience. The team operates globally with members across multiple continents, fostering an inclusive and diverse collaborative environment. This role offers a hybrid model, with 3 days per week working from the client's office in Krakow, Poland. Ready to launch your career in cloud engineering? Apply now and join our global team! Responsibilities Design and develop strategic platforms enabling trade executions to flow seamlessly from trading systems to operations and regulatory applications Transform epics and features into robust, scalable functionality within cloud-native architectures Collaborate closely with agile pod members in sprint cycles to iteratively deliver on product requirements Work directly with product teams to understand and implement complex functional requirements Implement modern data streaming, real-time, and batch processing solutions Develop and maintain CI/CD pipelines using DevOps best practices Apply Test-Driven Development (TDD) methodologies to ensure code quality Contribute to cloud architecture design and implementation decisions Participate in code reviews and technical design discussions Support the migration of legacy systems to modern cloud-based solutions Requirements Bachelor's degree in Computer Science or relevant technical certification Strong proficiency in Java programming and object-oriented design principles Solid experience with Apache Spark for big data processing Proficiency in Python for data processing and automation tasks Significant experience with DevOps CI/CD pipelines and tools such as Azure DevOps, GitHub, or GitLab Strong background in Test-Driven Development (TDD) practices Proven experience with cloud architecture and deployment on Azure, AWS, or GCP platforms Deep understanding of software design principles and patterns Experience with agile development methodologies and sprint-based delivery Strong problem-solving and analytical skills Excellent communication and collaboration abilities Ability to work effectively in diverse, distributed teams Nice to have Experience with modern data streaming technologies and real-time processing frameworks Hands-on experience with Databricks for advanced analytics and machine learning Knowledge of Kubernetes for container orchestration and microservices deployment Understanding of financial services domain and regulatory requirements Experience with batch processing frameworks and data pipeline orchestration Familiarity with investment banking operations and trading systems Previous experience in digital transformation initiatives Knowledge of regulatory compliance frameworks in financial services We offer/Benefits We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Long-term remote B2B opportunity for a Full Stack Software Engineer working on European digital transformation projects focused on Digital Identity, Web3, Blockchain, EBSI, and Verifiable Credentials. The role involves end-to-end development of frontend, backend, API, and blockchain solutions in an international Agile environment. Candidates will contribute to secure, scalable public-sector systems using modern cloud, DevSecOps, and decentralized identity technologies. 🗂️ Requirements: Bachelor's or Engineering degree in Computer Science, Software Engineering, Electronics, Mathematics, or Physics, English level B2 or higher, 10+ years of Full Stack Software Development experience with JavaScript/TypeScript, 3+ years of hands-on experience with Web3 and Blockchain applications, 2+ years of experience with DID, Verifiable Credentials, and Digital Identity Wallets, 2+ years of experience designing and implementing Smart Contracts on EVM-compatible networks, 2+ years of experience designing, developing, and securing RESTful APIs and web services, 2+ years of experience with blockchain tokenisation solutions, 2+ years of experience in public sector or European institutional projects, 8+ years of experience in Agile/Scrum environments, EU citizenship, Ability to work remotely from within the EU, CV submitted in Europass format 📃 Skills: JavaScript, TypeScript, Node.js, NestJS, Bun, React, Next.js, ReactNative, HTML5, CSS3, Webpack, Vite, REST, OpenAPI, OAuth2, OpenID, JWT, mTLS, OWASP, PostgreSQL, MySQL, MongoDB, Flyway, Solidity, OpenZeppelin, Hardhat, Foundry, ethers.js, viem, ERC-20, ERC-721, ERC-1155, UUPS, Diamond, DID, EBSI, eIDAS, OpenID4VP, OpenID4VCI, SIOP, Docker, Kubernetes, GitLab, Jenkins, ArgoCD, SonarQube, AWS, Azure 🏢 Description: For our client, a European Union Organisation based in Belgium, we are looking for an experienced Full Stack Software Engineer to join a long-term international project. You will contribute to the development of innovative solutions in the areas of Digital Identity, Web3, Blockchain, EBSI (European Blockchain Services Infrastructure), and Verifiable Credentials. This is a unique opportunity to work on large-scale initiatives supporting the digital transformation of public services across Europe. Role Overview: As a Full Stack Software Engineer, you will be responsible for designing, developing, testing, and maintaining end-to-end software solutions, including frontend applications, backend services, APIs, and blockchain-based components. You will work across the entire software development lifecycle, from architecture and design through implementation, testing, deployment, and production support. Responsibilities: - Design, develop, test, and maintain full-stack software solutions - Build modern, responsive user interfaces using React and Next.js - Design and implement backend services and RESTful APIs - Develop and integrate Web3 and blockchain-based solutions - Design, implement, and maintain smart contracts on EVM-compatible networks - Build and integrate decentralized identity solutions, including DID and Verifiable Credentials - Integrate systems with European digital identity and trust-service infrastructures - Implement secure authentication, authorization, and cryptographic mechanisms - Develop automated unit, integration, end-to-end, performance, and security tests - Contribute to CI/CD pipelines, DevSecOps processes, and cloud-native environments - Translate business and technical requirements into scalable and maintainable software solutions - Produce and maintain technical documentation - Collaborate with architects, DevOps engineers, security experts, product owners, and other stakeholders - Ensure compliance with security best practices and software quality standards Requirements: Education: - University degree (minimum Bachelor's or Engineering degree) in Computer Science, Software Engineering, Electronics, Mathematics, or Physics Language: - English minimum B2 level (CEFR) - Excellent written and verbal communication skills - Ability to communicate effectively with technical and non-technical stakeholders in an international environment Professional Experience: - Minimum 10 years of experience in Full Stack Software Development using JavaScript/TypeScript - Minimum 3 years of hands-on experience with Web3 and Blockchain-based applications - Minimum 2 years of experience implementing Decentralized Identifiers (DID), Verifiable Credentials, and Digital Identity Wallets - Minimum 2 years of experience designing and implementing Smart Contracts on EVM-compatible blockchain networks - Minimum 2 years of experience designing, developing, and securing RESTful APIs and web services - Minimum 2 years of experience working with blockchain-based tokenisation solutions - Minimum 2 years of experience delivering projects within the public sector or European institutional environment - Minimum 8 years of experience working in Agile/Scrum environments on complex, multi-stakeholder projects Technical Skills: Backend: - JavaScript - TypeScript - Node.js - NestJS - Bun Frontend: - React - Next.js - React Native - HTML5 - CSS3 - Webpack - Vite APIs & Security: - REST APIs - OpenAPI - OAuth 2.0 - OpenID Connect - JWT - mTLS - OWASP Databases: - PostgreSQL - MySQL - MongoDB - Flyway Blockchain & Web3: - Solidity - OpenZeppelin - Hardhat - Foundry - ethers.js or viem - ERC-20 - ERC-721 - ERC-1155 - UUPS - Transparent Proxy - Diamond Pattern Digital Identity: - DID (Decentralized Identifiers) - Verifiable Credentials - EBSI - eIDAS 2.0 - OpenID4VP - OpenID4VCI - SIOP v2 - EUDI Wallet DevOps & Cloud: - Docker - Kubernetes - GitLab CI - Jenkins - ArgoCD - SonarQube - AWS or Azure Application Requirement: - Submitted CVs must be provided in Europass format - EU citizenship and work from within the EU required What We Offer: - Long-term B2B cooperation - Project duration of up to 48 months - Competitive rate of 450–500 EUR/MD - Primarily remote work from within the European Union - One or two physical meetings with the customer per 12-month period, maximum 2 days each, at contractor’s cost - Opportunity to work on cutting-edge Digital Identity, Blockchain, and Web3 initiatives - International and multicultural working environment - Collaboration with highly skilled professionals from across Europe

🏢 Summary: Senior Fullstack Developer (Java) role focused mainly on backend development for a logistics platform providing operational monitoring, schedule transparency, and analytical insights. The position involves designing, developing, and maintaining Java EE applications, including modernization and cloud migration initiatives. Work is primarily remote with occasional on-site visits. 🗂️ Requirements: Minimum 5 years of experience as Fullstack Developer, Strong proficiency in Java, Experience with JSF, JPA, EJB, CDI, JAXRS, Hands-on experience in JEE web application development, Basic knowledge of SQL, Basic knowledge of UNIX, Experience with Maven, Experience with Git, Ability to manage and maintain Payara Server, Experience with requirements analysis and UML modeling, Fluent English (written and spoken) 📃 Skills: Java, JEE, JSF, JPA, EJB, CDI, JAXRS, SQL, UNIX, Maven, Git, Payara, OpenAPI, DB2, Neptune, OpenSearch, PrimeFaces, GitLab, Jenkins, JFrog, AWS, UML 🏢 Description: About the Project For our Client - a global logistics company we are looking for a Senior Fullstack Developer (Java) who will be working with a platform that integrates several sources for giving transparent view for coastals schedule to internal operational stakeholders. Team also provides the tools for the operational monitoring, past performance analysis and recovery measures. Additional insights provided by the platform are based on statistical & analytical approaches (e.g. move prediction, avg. port time, etc.) The role is approx. 75% BE tasks and 25% FE tasks. Tech: Java EE, JDK 8, Payara Server 5, OpenAPI, IBM DB2, Neptune graph DB from AWS, OpenSearch, UI: JSF + Primefaces, GitLab, Jenkins, JFrog Work Mode: remote (with occasional trips to Gdańsk) Job Responsibilities Design and implement full-stack applications (front- and backend) using Java (JEE) Write, test, debug, and document code, solutions, and applications Collaborate with your team to handle the entire software development life cycle: from analysis and design to testing, deployment, maintenance, operations, and 3rd-level support Work closely with internal stakeholders and external partners to analyze existing applications, solutions, business processes, and requirements Modernize and expand current applications by migrating from on-premises infrastructure to a cutting-edge cloud platform Manage and maintain existing on-premises infrastructure, including Payara Application Servers and standalone Java applications Expectations Min. 5 years of experience as Fullstack Developer Strong proficiency in Java, with knowledge of JSF, JPA, EJB, CDI, and JAX-RS Hands-on experience in JEE full-stack web application development Basic knowledge of SQL, UNIX, Maven, and Git Familiarity with requirements gathering, documentation, and the use of software design/modeling tools (e.g., UML) Solid understanding of software development processes, with flexibility and strong customer orientation Excellent command of English , both written and spoken, combined with strong communication skills Nice to have: Experience with agile development methodologies (e.g., Scrum); Knowledge of AWS cloud services (OpenSearch, EC2, Neptune, ECS); Work experience or familiarity with the international logistics industry; DevOps experience We offer Ongoing support from a dedicated agent , taking care of your project continuity, client contact, necessary formalities, work comfort and development Consultant Development Program – advice on growth planning based on the latest trends and market needs in IT, including consultations with agents and growth mentors Access to 7N Learning & Development – a development and educational platform with webinars, a library of articles and industry reports, and regular invitations to one-time and recurring development events – technical, business, and lifestyle Spectacular integration events , both for you (e.g., annual Kick-Off trip , Christmas parties, or Summer Olympics sports events) and for your loved ones (e.g., family picnics, movie premieres) Professional development not only during the project – you can get involved in knowledge transfer to others within the 7N Services offering directed at 7N clients Relationships and access to the knowledge of the most experienced IT experts in the market – the average professional tenure of our consultants in Poland is over 10 years A complete benefits package , including funding for medical care, life insurance, sports cards for you and your loved ones, as well as discounts in stores in Poland and abroad About 7N Constantly searching for projects, difficult rate negotiations, lack of development support – sounds familiar? At 7N, you gain not only stability of contracts but also the personal involvement of a dedicated agent who ensures your professional comfort and continuous access to development initiatives. Our mission is to provide stable and rewarding collaborations that drive your success as an IT expert and the success of our clients. We build long-lasting relationships based on Scandinavian values and 30 years of experience creating IT solutions for over 200 organizations.

🏢 Summary: Senior Java Developer role focused on modernizing a legacy trading platform for a global financial institution by decomposing a monolithic system into scalable and observable distributed services. The position involves architectural decision-making, integration design, asynchronous communication, and ensuring reliability of critical trading processes. Hybrid work model in Kraków with long-term B2B cooperation. 🗂️ Requirements: Commercial experience with Java, Experience with Spring Framework, Experience with large legacy monolithic systems, Knowledge of distributed systems architecture, Experience with REST API integration, Experience with SOAP Web Services, Strong database experience, Experience with Oracle, Knowledge of service decomposition and domain-driven design, Experience with asynchronous communication systems, Knowledge of Kafka or messaging brokers, Knowledge of transaction handling and eventual consistency, Understanding of retry mechanisms and dead-letter queues, Knowledge of observability, monitoring, logging, and tracing, Understanding of scalability and idempotent processing, Ability to evaluate synchronous vs asynchronous communication trade-offs, Analytical and problem-solving skills, Ability to communicate architectural decisions, English level B2/C1, Availability ASAP or within one month notice period 📃 Skills: Java, Spring, REST, SOAP, Oracle, Kafka, Messaging, Microservices, DDD, SQL, Monitoring, Tracing, Logging, Observability 🏢 Description: Be in IT to firma rekrutacyjna, wyspecjalizowana w poszukiwaniu Specjalistów z branży technologii informatycznych. Obecnie, dla naszego klienta, poszukujemy osoby na stanowisko: Senior Java Developer. Zakres obowiązków: Długofalowa współpraca z międzynarodową, topową firmą consultingową, świadcząca usługi IT dla dużych i średnich firm z różnorodnych sektorów jak automotive, healthcare, finanse, bankowość czy produkcja. Ten konkretny projekt realizowany będzie dla międzynarodowej instytucji finansowej. Dla naszego klienta poszukujemy doświadczonego Senior Java Developera, który wesprze modernizację kluczowej platformy tradingowej wykorzystywanej głównie do obsługi transakcji typu swaps oraz FRA. Obecny system to rozbudowana, legacy monolityczna aplikacja odpowiadająca za pełny proces obsługi transakcji — od rejestracji trade’ów, przez walidację, akceptacje, afirmację, obsługę zdarzeń w cyklu życia transakcji, wycenę, terminację, zapadalność, aż po settlement. Celem roli jest wsparcie podziału istniejącej platformy monolitycznej na dobrze zaprojektowane, skalowalne, obserwowalne i odporne usługi, przy jednoczesnym zapewnieniu ciągłości działania krytycznych procesów tradingowych. To rola seniorska, łącząca praktyczne doświadczenie inżynierskie z dojrzałym podejściem architektonicznym. Szukamy osoby, która potrafi pracować z dużymi systemami legacy, rozumie złożoność środowiska finansowego i potrafi podejmować świadome decyzje dotyczące architektury systemów rozproszonych. Analiza istniejącej monolitycznej platformy tradingowej oraz zaproponowanie pragmatycznej strategii jej dekompozycji. Identyfikacja logicznych granic usług na podstawie zdolności biznesowych oraz domenowych obszarów systemu. Wsparcie przejścia z silnie powiązanego monolitu do architektury usługowej lub mikroserwisowej. Projektowanie docelowego podziału systemu na serwisy odpowiedzialne za konkretne obszary biznesowe, definiowanie granic usług dla takich procesów jak: trade capture, walidacja transakcji, akceptacje i approval flow, trade affirmation, zarządzanie cyklem życia transakcji, valuation, termination, maturity processing, settlement, reporting, widoczność stanu systemu. Projektowanie wzorców komunikacji pomiędzy usługami oraz systemami zewnętrznymi, dobór odpowiednich mechanizmów integracji, takich jak REST API, SOAP, messaging, kolejki, Kafka lub inne brokery komunikatów. Ocena trade-offów pomiędzy komunikacją synchroniczną a asynchroniczną. Definiowanie zasad własności danych w architekturze usługowej, określanie, które serwisy powinny posiadać własne bazy danych oraz które dane powinny być traktowane jako własność konkretnej domeny. Projektowanie strategii synchronizacji danych pomiędzy usługami. Proponowanie podejść do eventual consistency, replikacji danych oraz ograniczania zależności od centralnej bazy typu „golden source”. Projektowanie mechanizmów obsługi błędów w systemach rozproszonych. Definiowanie strategii retry, dead-letter queues, failure recovery oraz obsługi częściowych awarii, projektowanie rozwiązań odpornych na duplikaty komunikatów, problemy współbieżności oraz niespójności danych. Wspieranie skalowania horyzontalnego oraz projektowanie procesów idempotentnych. Definiowanie podejścia do observability, monitoringu, logowania, tracingu, correlation IDs oraz dashboardów operacyjnych. Zapewnienie audytowalności procesów oraz widoczności aktualnego stanu systemu. Współpraca z analitykami biznesowymi, developerami, architektami, zespołami QA oraz production support. Udział w podejmowaniu decyzji architektonicznych i komunikowanie ich zarówno zespołom technicznym, jak i interesariuszom biznesowym. Wsparcie zapewnienia, że nowa architektura spełnia wymagania dotyczące wydajności, niezawodności, stabilności operacyjnej oraz zgodności regulacyjnej. Oczekujemy: Bardzo dobre doświadczenie komercyjne w pracy z Java oraz Spring Framework . Doświadczenie w pracy z dużymi, złożonymi systemami legacy, najlepiej aplikacjami monolitycznymi. Dobre zrozumienie architektury systemów rozproszonych. Praktyczne doświadczenie w projektowaniu i integracji systemów z użyciem REST API . Doświadczenie z SOAP Web Services oraz integracjami systemowymi. Silne doświadczenie bazodanowe, preferencyjnie z Oracle . Znajomość podejść takich jak service decomposition, bounded contexts, domain-driven design lub podobnych metod modelowania architektury. Doświadczenie w projektowaniu systemów wykorzystujących komunikację asynchroniczną. Praktyczna znajomość kolejek, Kafki lub innych brokerów komunikatów. Znajomość zagadnień takich jak transaction handling, eventual consistency, retry mechanisms, dead-letter queues oraz failure recovery. Zrozumienie koncepcji observability, w tym logowania, monitoringu, tracingu, correlation IDs oraz dashboardów operacyjnych. Znajomość wzorców skalowalności, w tym idempotentnego przetwarzania oraz zapobiegania duplikacji komunikatów. Umiejętność oceny kompromisów pomiędzy komunikacją synchroniczną REST a komunikacją asynchroniczną opartą o messaging. Bardzo dobre umiejętności analityczne i problem-solvingowe. Umiejętność jasnego komunikowania decyzji architektonicznych do odbiorców technicznych i nietechnicznych. Gotowość do pracy w środowisku o wysokiej krytyczności biznesowej i operacyjnej. Znajomość języka angielskiego na poziomie B2 lub C1 - umożliwiająca swobodną komunikację w międzynarodowym środowisku. Dostępność ASAP lub maksymalnie miesięczny okres wypowiedzenia, ze skutkiem na koniec miesiąca. Oferujemy: Długofalowa współpraca z wynagrodzeniem w przedziale 140-160 PLN netto/godz. + VAT. Wsparcie przy zakładaniu i prowadzeniu działalności gospodarczej, dla osób bez takiego doświadczenia. Sprawny proces rekrutacyjny - 1. Background check (wypełnienie formalnych dokumentów), 2. Rozmowa techniczna z Managerem, około godziny, zdalnie. Współpraca hybrydowa w Krakowie, 8 dni w miesiącu w biurze (w dowolnej konfiguracji, np. pod rząd lub rozłożone w miesiącu). Benefity - prywatna opieka medyczna, karta Multisport. Nowoczesny sprzęt zapewniany przez firmę, wraz z softem i konfiguracją.

🏢 Summary: B2B contract role for a Senior Full-Stack Engineer to build and own features end-to-end, from Java/Spring backend services and data models to React-based frontend interfaces. The position involves contributing to shared UI components and backend architecture, performing cross-stack code reviews, and working in a cloud-native environment. 🗂️ Requirements: Strong backend experience with Java 21, Proficiency in Spring and Spring Boot, Experience with Hibernate, Solid frontend experience with JavaScript and TypeScript, Strong knowledge of React and Redux Toolkit, Good understanding of relational databases, especially MariaDB, User-level or higher Linux skills, Confident use of Git workflows, Ability to write well-tested, maintainable code, Advanced technical English, Experience with Kubernetes and cloud-native platforms, Ability to effectively use AI coding assistants and LLM tools 📃 Skills: Java, Spring, SpringBoot, Hibernate, JavaScript, TypeScript, React, Redux, MariaDB, SQL, Linux, Git, Kubernetes, AI, LLM 🏢 Description: Join our client's team as a Senior Full-Stack Engineer! RESPONSIBILITIES Own features end-to-end — from API and data model on the backend to the UI on the frontend Build and maintain backend services in Java, and rich interfaces in React Contribute to our shared UI component library and backend architecture alike Take part in code reviews across the stack — backend, frontend, and the glue in between REQUIREMENTS Strong backend skills in Java 21 with Spring / Spring Boot and Hibernate Solid frontend experience with JavaScript, TypeScript, React, and Redux Toolkit Good grasp of relational databases, especially MariaDB Linux skills at user level or above, plus confident Git workflows You write well-tested, maintainable code on both sides of the stack Advanced technical English for design, review, and documentation\ Proven experience with cloud-native platforms such as Kubernetes Comfortable using AI tools (coding assistants, LLMs) as part of your daily workflow — and the judgment to know when to trust them and when to think for yourself NICE TO HAVE Experience building software for telecommunication systems Knowledge of protocols like IPv4/6, DNS, BGP, DHCP, SR, and ZTP Data visualization libraries — Cytoscape.js, react-chartjs-2, MapLibre, or similar Storybook, mono-repo tooling (Lerna), or Webpack experience Automation tools such as Ansible or Terraform Understanding of Linux and Kubernetes networking (routing, iptables, CNI) WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract and rate: 160-180 PLN/hour Hybrid work from Kraków (1 times a week in the office) The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client Events and integration meetings, as well as participation in various initiatives, e.g., sports Access to the benefits offering (medical care, Multisport card) WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE? Application: Apply and submit your CV. After the application review, the recruiter will contact selected candidates by phone. Screening: Have a conversation with a speedapp recruiter about your experience. Next steps: The speedapp recruiter will explain the recruitment process for the specific position. The speedapp recruiter will stay in touch with you throughout the entire process. ABOUT SPEEDAPP At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them. 👉 10 years of experience 👉 +100 clients worldwide +300 hires per year 💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch. DO YOU HAVE ANY QUESTIONS? Contact the recruiter responsible for this process directly. Karolina Kizowska Senior IT Delivery Consultant karolina.kizowska@speedapp.pl +48 608 487 448