Senior Software Engineer (Scala & Python)

🏢 Summary: B2B contract for a Senior Software Engineer to design and build backend services and full-stack features for an AI platform, working primarily with TypeScript. The role focuses on developing REST/GraphQL APIs, optimizing PostgreSQL databases, and containerizing services with Docker in a remote-first environment within Poland. 🗂️ Requirements: Minimum 5 years of experience in JavaScript and TypeScript, Experience designing and building RESTful or GraphQL APIs, Hands-on experience with Next.js and/or NestJS, Experience with TypeScript ORM, preferably Drizzle, Strong PostgreSQL skills including schema design and query optimization, Experience with Docker for development and deployment, Ability to use AI tools in daily engineering work, Fluency in Polish, Advanced English level (B2/C1) 📃 Skills: JavaScript, TypeScript, REST, GraphQL, Next.js, NestJS, Drizzle, PostgreSQL, Docker, AI, ORM 🏢 Description: Contract: B2B Rate: 140 - 150 PLN/h net+VAT Location: Remote within Poland Start: ASAP Key Technologies: JavaScript, TypeScript Backend APIs: REST, GraphQL Frameworks: Next.js, NestJS ORM: Drizzle (or similar modern TypeScript ORM) Database: PostgreSQL Containerization: Docker AI tooling: AI-assisted development, agentic coding workflows Nice to have: Kubernetes, BullMQ, Puppeteer, web scraping, AI integrations: Model Context Protocol (MCP) and agent-to-system interfaces Project Overview We’re looking for a Senior Software Engineer who is comfortable working on both backend and full-stack tasks when needed. As an early member of the team, you will help design and build the systems behind our AI platform. You will work mainly in TypeScript, build APIs and services, and contribute to full-stack features in Next.js. Responsibilities: Design and build backend services and APIs (REST and/or GraphQL). Develop full-stack features in Next.js when needed. Design database schemas and optimize queries in PostgreSQL. Work with a TypeScript ORM, preferably Drizzle. Containerize services for development and deployment using Docker. Troubleshoot issues, improve performance, and maintain reliability. Review code, share best practices, and support team development. Write and maintain clear technical documentation Requirements: Min. 5 years of experience in JavaScript and TypeScript. Experience designing and building RESTful or GraphQL APIs. Hands-on experience with Next.js and/or NestJS . Experience with ORMs in TypeScript, ideally Drizzle. Strong PostgreSQL skills, including schema design and query optimization. Docker experience for local development and deployments. Interest in using AI tools in day-to-day engineering work and improving development workflows. Fluency in Polish and an advanced level of English (B2/C1) Nice to have: Kubernetes experience. BullMQ or similar background job and queue systems. Puppeteer or web scraping and browser automation. Knowledge of Model Context Protocol (MCP) or how AI agents integrate with systems. Why join us? Rite NRG is a vibrant outsourcing technology company driven by the Right People . We are dedicated to empowering businesses through innovative software solutions. We focus on building strong partnerships and providing top-notch software solutions that drive real business growth. Our business model revolves around collaboration and delivering impactful results for our clients. Join us, and be part of a team where great minds, Right Energy , and strong partnerships come together to shape the future of technology! Stable, long-term, full-time collaboration. Remote work within Poland and flexible working hours. High engineering culture with a focus on growth and learning. Multinational teams. Benefits: Private medical care, Multisport card, and workation (work for a week from Barcelona or elsewhere).

🏢 Summary: B2B full-stack role for a Nordic SaaS project focused on designing and implementing scalable, cloud-based microservices and high-availability applications. The position emphasizes strong backend development in Java/Spring with modern frontend frameworks, test-driven practices, and cloud integrations. Work involves building robust, maintainable systems optimized for scalability and operational efficiency in a remote environment within Poland. 🗂️ Requirements: Minimum 5 years commercial experience as Full-Stack Developer, Strong experience with Java, Strong experience with Spring and Spring Boot, Experience with Angular or Vue.js, Experience in microservices architecture, Experience building REST APIs, Experience with relational databases and SQL, Knowledge of Linux and server operations, Experience with virtualization, Experience with automated testing frameworks, Understanding of cloud environments and serverless functions, Experience with autoscaling and high-availability systems 📃 Skills: Java, Spring, SpringBoot, Angular, Vue, JavaScript, TypeScript, REST, SQL, Microservices, Linux, Virtualization, Selenium, Wiremock, AWS, Lambda, CI/CD, Jenkins 🏢 Description: Contract: B2B Salary: 110–140 PLN/h net/B2B Location: Remote within Poland Start: ASAP Key Technologies Java (Spring, Spring Boot) JavaScript / TypeScript, Angular, Vue.js JSON/REST, Relational Databases (SQL) Microservices architecture, Autoscaling, High Availability Linux, Server Operations & Virtualization Automated Testing (Selenium, Wiremock) AWS Lambda or similar cloud functions Project Overview Join the team as a Full-Stack Developer supporting a Nordic SaaS customer. The project involves designing and implementing scalable, cloud-based microservices , delivering high-quality, adaptive software solutions. You will collaborate in cross-functional teams to improve architecture, develop automated and test-driven systems, and contribute to real-time, high-availability applications. The focus is on building robust backend services while integrating modern frontend frameworks, optimizing for scalability, maintainability, and operational efficiency . Responsibilities Design, develop, and maintain full-stack applications with emphasis on microservices architecture Apply test-driven development practices in an agile environment Collaborate in cross-functional teams to continuously improve systems and workflows Contribute to architecture decisions ensuring scalability, adaptability, and high availability Integrate cloud-based services (AWS Lambda or similar) Develop automated tests and CI/CD pipelines Leverage AI/automation tools where applicable to improve development efficiency Mentor junior developers and share knowledge of best practices Requirements Min. 4 years of commercial experience as a Full-Stack Developer (mid-to-senior level) Strong hands-on experience with Java, Spring / Spring Boot , and frontend frameworks Angular, Vue.js Experience in microservices, REST APIs, relational databases, SQL Solid knowledge of Linux, server operation, and virtualization Experience with automated testing frameworks like Selenium and Wiremock Understanding of cloud environments , serverless functions, and autoscaling Good communication skills in English (B2+/C1) Ability to work independently in an evolving product environment Nice to have Experience with Elixir, Scala, Python, or Asterisk Knowledge of WebRTC or SIP protocols Familiarity with CI/CD tools (Jenkins), project tools (Confluence, Jira) Exposure to AI-assisted development or custom AI integrations Experience with cloud-native architectures and large-scale SaaS systems Why join us? Rite NRG is a vibrant outsourcing technology company driven by the Right People . We are dedicated to empowering businesses through innovative software solutions. We focus on building strong partnerships and providing top-notch software solutions that drive real business growth. Our business model revolves around collaboration and delivering impactful results for our clients. Join us, and be part of a team where great minds, Right Energy , and strong partnerships come together to shape the future of technology! Stable, long-term, full-time collaboration. Remote work within Poland and flexible working hours. High engineering culture with a focus on growth and learning. Multinational teams. Benefits: Private medical care, Multisport card, and workation (work for a week from Barcelona or elsewhere).

🏢 Summary: Senior Frontend Engineer role for developing an AI-powered wealth management platform with greenfield frontend features, autonomous AI integrations, and complex state management. The position focuses on technical ownership, scalable frontend architecture, and delivery of high-quality Angular applications in a remote EU-based B2B engagement. 🗂️ Requirements: 5+ years of professional experience with Angular and TypeScript, Strong knowledge of modern Angular, Experience with standalone components, Experience with signals, Experience with change detection, Experience with NgRx and RxJS, Frontend architecture expertise, State management expertise, Experience with testing, tooling, and build pipelines, Hands-on experience with AI coding agents, Ability to guide and validate AI-generated code, Strong debugging and code review skills, Experience with API client code generation, Experience with strict linting and formatting, Experience with automated E2E testing, Understanding of clean code and frontend design patterns, Fluency in Polish, Advanced English level (B2/C1) 📃 Skills: Angular, TypeScript, NgRx, RxJS, AngularMaterial, AI, LLM, Claude, E2E, API, Linting, Formatting 🏢 Description: Contract: B2B Rate: 140 - 170 zł/h, depending on skills and experience Location: Remote within the EU Duration: 6 -12 months Start: ASAP Project Frontend development of an advanced, AI-powered wealth management platform, focused on building next-generation greenfield features and integrating autonomous AI agents. Key Technologies/Areas - Angular (Modern reactive features & Standalone architecture) - TypeScript (Strict mode ecosystem) - State Management (NgRx & RxJS) - Angular Material UI framework - Agentic AI and LLM integration (Streaming data, Dynamic UI generation) - Frontend Architecture & Code Quality Automation - Automated E2E Testing Frameworks - AI-assisted development tools (e.g., Claude Code) Project Overview We are looking for a Senior Frontend Engineer with a strong generalist mindset to take technical ownership of the client-facing layer of a sophisticated, AI-driven platform designed for private wealth trust managers. You will be expected to independently assess available options, ask the right questions and make sound, defensible architectural and technical decisions. The platform is being developed as a focused, single-portal application built around a rich workspace. The frontend includes complex, domain-heavy NgRx state management, custom visualisation and diagramming capabilities, as well as new agentic AI features such as streaming model responses, dynamically generated user interfaces and autonomous agent workflows. A significant part of the upcoming work is greenfield, giving you real influence over the frontend architecture and engineering standards. Responsibilities - End-to-end delivery of frontend features, collaborating closely with product and design teams to balance user experience with technical feasibility. - Architect and evolve a highly scalable, clean codebase designed for long-term maintainability without technical debt. - Write elegant, self-explanatory, and robust production code, prioritizing clean simplicity over over-engineering. - Set up, optimize, and maintain automated end-to-end (E2E) testing suites to guarantee platform stability. - Incorporate AI coding assistants (such as Claude Code) into your everyday engineering workflow, showing proficiency in guiding, auditing, and validating AI-generated output. - Actively participate in code reviews, technical grooming, and architectural alignment sessions while upholding uncompromisingly high engineering standards. - Optimize frontend performance, specifically focusing on the predictability and speed of AI-driven real-time interactions. Requirements - At least 5 years of professional software development experience with Angular and TypeScript - Strong knowledge of modern Angular, including standalone components, signals, change detection, NgRx and RxJS - Broad frontend expertise across UI development, architecture, state management, testing, tooling and build pipelines - Hands-on experience using AI coding agents, such as Claude Code, as part of your daily development workflow - Ability to effectively steer AI agents, provide clear context and constraints, and break complex tasks into actionable steps - Strong skills in reviewing, testing, debugging and verifying AI-generated code before using it in production - Ability to work with incomplete requirements, ask the right questions and make sound technical trade-offs - Strong understanding of clean code, frontend design patterns and long-term maintainability - Experience with API client code generation, strict linting and formatting, and automated E2E testing - Fluency in Polish and an advanced command of English (B2/C1), enabling smooth communication in an international setting Nice to have - Experience building complex data visualization tools, interactive dashboards, or custom charting solutions - Background in FinTech, wealth management, or domain-heavy SaaS platforms - Familiarity with event-driven frontend architectures or real-time data streaming Benefits - Stable, long-term, full-time collaboration - Remote work within the EU and flexible working hours - High engineering culture with a focus on growth and learning - Opportunity to work on a mature SaaS platform and production AI solutions - Multinational teams - Private medical care - Multisport card - Workation opportunities

🏢 Summary: B2B Tech Lead role to design and deliver a scalable integration framework for AI-powered financial services products. The position focuses on building production-ready, event-driven integrations using Node.js and AWS within a regulated FinTech environment. You will lead architectural decisions and guide the team in implementing resilient, cloud-native microservices solutions. 🗂️ Requirements: 10+ years of experience in software development, Strong commercial experience with Node.js, Strong experience with AWS and cloud-native architecture, Excellent knowledge of event-driven architecture, Experience designing and building microservices systems, Experience building integrations with external APIs and third-party systems, Experience with high-volume data processing systems, Practical knowledge of API quotas, rate limits, retries, and resilience patterns, Experience operating production-grade systems, Technical leadership experience in integration or platform teams, Fluency in Polish, Advanced English proficiency 📃 Skills: Node.js, AWS, Microservices, Event-driven, APIs, Cloud, Integration, FinTech, AI, LLM 🏢 Description: Contract: B2B Rate: 150 - 180 PLN/h net + VAT Location: Remote within Poland Project: Building an integration framework for AI-powered products in the financial services sector Start: 15 June 2026 Key Technologies/Areas Backend: Node.js Cloud: AWS Architecture: Microservices, event-driven architecture, integration frameworks Data: High-volume data processing, external API integrations, rate limits, quotas Engineering: Technical leadership, architecture, stakeholder communication, scalable production systems Domain: FinTech, regulated financial services, compliance, AI-powered products Project Overview Join our team as an Tech Lead and support a FinTech company building AI-powered products for the financial services sector. The project focuses on developing an Integration Framework that enables new customers to easily connect with advanced AI systems used for adviser support, compliance monitoring, quality assurance, and customer interaction analysis. This is a hands-on technical leadership role focused on designing and delivering the integration framework, setting integration patterns, and guiding the engineering team on event-driven, scalable, and resilient architecture. You will lead the technical approach to building scalable, reliable, and production-ready integrations, with a strong focus on Node.js, AWS, microservices, and event-driven architecture. Responsibilities Lead the technical approach to building an integration framework for AI-powered financial services products. Design and develop scalable integration solutions using Node.js, AWS, microservices, and event-driven architecture. Provide technical leadership to the integration team and support engineers in making strong architectural and implementation decisions. Work closely with stakeholders to understand integration requirements and translate them into robust technical solutions. Build and maintain integrations with third-party providers, accounting for quotas, rate limits, API constraints, retries, failure handling, and data consistency. Support architectural discussions and contribute to technical decision-making around integration patterns and event-driven systems. Help ensure solutions are suitable for regulated financial services environments, with a focus on security, reliability, auditability, and compliance. Requirements Around 10+ years of experience as a software developer, including significant experience building and operating production systems. Strong commercial experience with Node.js. Strong experience with AWS and cloud-native system design. Excellent knowledge of event-driven architecture. Experience designing and building microservices-based systems. Proven experience in technical leadership, especially within integration-focused or platform-oriented teams. Strong experience building integrations with external systems, APIs, and third-party providers. Experience working with high-volume data processing systems. Practical knowledge of handling API quotas, rate limits, provider limitations, retries, failure scenarios, and resilience patterns. Strong communication skills, with the ability to work effectively with both technical and non-technical stakeholders. Ability to take ownership of architectural decisions and be accountable for the technical direction of the solution. Fluency in Polish and advanced English communication skills, with the ability to take a stand and be held accountable for technical decisions. Nice to have Experience in FinTech, financial services, or another regulated industry. Experience working on AI-powered or data-intensive products. Experience integrating or embedding AI capabilities into software products. Practical experience using AI / LLM coding tools across the software development lifecycle. Why join us? Rite NRG is a vibrant outsourcing technology company driven by the Right People. We are dedicated to empowering businesses through innovative software solutions. We focus on building strong partnerships and providing top-notch software solutions that drive real business growth. Our business model revolves around collaboration and delivering impactful results for our clients. Join us, and be part of a team where great minds, Right Energy, and strong partnerships come together to shape the future of technology! Stable, long-term, full-time collaboration. Remote work within Poland and flexible working hours. High engineering culture with a focus on growth and learning. Multinational teams. Benefits: Private medical care, Multisport card, and workation (work for a week from Barcelona or elsewhere).

🏢 Summary: Senior Full Stack Software Engineer role focused on building and scaling a production-ready AI product, covering feature development, infrastructure, and client integrations. The position involves hands-on work with Python, DevOps/MLOps, and GenAI solutions, ensuring system reliability and production readiness. This is a remote contract role with expected extensions. 🗂️ Requirements: Strong Python development experience, DevOps expertise with CI/CD pipelines, MLOps experience with automated deployment and monitoring, Experience building agentic AI products, Experience with API integrations, Hands-on experience with GenAI/LLM, Ability to harden systems for production, Experience fine-tuning AI models, Experience with prompt engineering 📃 Skills: Python, CI/CD, DevOps, MLOps, GenAI, LLM, APIs, Automation, Deployment, Monitoring, Fine-tuning, Prompt-engineering 🏢 Description: Location : Remote with occasional visits to Łódź Employment type : 2 months initial contract - to be extended, B2B/Umowa Zlecenie Salary: up to 160zł/hour (B2B) Senior Software Engineer – AI Product (Full Stack) We’re looking for a Senior Software Engineer to help build and scale a production-ready AI product. This is a hands-on, full-stack role covering feature development, infrastructure, and client integration. What you’ll do Design, build, and deploy new features in Python Own DevOps/MLOps: CI/CD pipelines, automated model deployment, monitoring Integrate AI solutions into client-facing products Improve system reliability, performance, and production readiness Enhance AI models through fine-tuning and prompt engineering Contribute to short-term R&D initiatives and product innovation Build and evolve internal systems for model evaluation and performance tracking Must-have Strong Python development experience DevOps & MLOps expertise (CI/CD, automation, deployment) Experience building agentic AI products and API integrations Hands-on GenAI/LLM experience (classic ML not required) Proven ability to harden systems for production Nice to have Experience building model evaluation/monitoring systems Fine-tuning, prompt engineering, and performance optimization Details Contract extensions expected If you enjoy building real-world AI products end-to-end—from models to production—we’d love to hear from you.

🏢 Summary: Senior Software Engineer role focused on building and scaling backend services and AI-powered features using Scala and Python. The project involves integrating AI models and external AI services via APIs in a remote B2B engagement based in Poland. The contract is for 6 months with the possibility of extension. 🗂️ Requirements: Strong commercial experience with Scala, Strong proficiency in Python, Senior-level software engineering knowledge, Experience with testing, Experience with version control, Experience with CI/CD, Knowledge of Agile methodologies 📃 Skills: Python, Scala, LLMs, ElasticSearch, PHP, AWS, Azure, GCP, CI/CD, APIs, Agile 🏢 Description: Senior Software Engineer SKILLS: Python | Scala | AI models integration Project duration: 6 months with the possibility of extension B2B CONTRACT LOCATION: POLAND (REMOTE) Key Duties and Requirements: A Roadmap to Your Professional Success 🚀 Scope of responsibilities: Develop and maintain robust backend services using Scala and Python Design, implement, and scale AI-powered features across the platform Integrate internal and external AI services via APIs (including LLMs and similar AI platforms) Contribute to the continuous improvement of backend architecture and AI capabilities Here is a set of skills we require: Must-have: Strong commercial experience with Scala in production environments Strong proficiency in Python Senior-level understanding of software engineering best practices, including testing, version control, CI/CD, and Agile methodologies Nice-to-have: Hands-on experience working with Large Language Models (LLMs) Experience with AI-based transcription solutions or similar AI models Knowledge of ElasticSearch Experience integrating AI services through APIs Experience with PHP development Familiarity with public cloud AI services such as AWS , Azure , or GCP

🏢 Summary: B2B contract for an experienced .NET Developer to enhance a core backend platform in the roadside assistance and insurance domain, focusing on improving a data-driven parts-picking algorithm. The role involves building and optimizing backend services, integrating multiple data sources, and designing scalable REST APIs in Azure. It is a problem-solving oriented project requiring strong ownership and backend architecture skills. 🗂️ Requirements: Minimum 5+ years commercial experience as Backend/.NET Developer, Strong experience with C# and modern .NET, Hands-on experience with Azure services, Strong experience with SQL and relational databases, Experience building and maintaining REST APIs, Ability to design scalable and maintainable backend architectures, Experience integrating multiple data sources (APIs, databases, external systems), Fluent Polish and advanced English (B2/C1) 📃 Skills: C#, .NET, Azure, SQL, REST, API, Snowflake, Microsoft, Dynamics 🏢 Description: Contract : B2B Salary : 110 - 130 PLN/h net/B2B Location : Remote within Poland Start : ASAP (first week of April at the latest) Key Technologies C# / .NET Azure SQL REST API Nice to have: Snowflake, Microsoft Dynamics Project Overview Join the team as a .NET Developer and work on a core platform for a leading UK provider of roadside assistance and insurance. The SMR domain (Service, Maintenance & Replace) supports mechanics and service operations by ensuring the right parts are selected for jobs booked - quickly and accurately. Your main focus will be to enhance the parts-picking algorithm to improve prediction quality and operational efficiency. This is a true problem-solving project: you’ll work with multiple disjointed datasets, identify patterns and gaps, and design backend solutions that can be reused across other areas of the business. Responsibilities Design, develop, and maintain backend services using C#/.NET Build and evolve data-driven logic to improve parts prediction and selection accuracy Integrate and unify data from multiple sources (API/DB/external systems) Write efficient, maintainable SQL and support data-quality initiatives Develop and maintain REST APIs used by other services and operational tools Contribute to architecture decisions with a focus on reusability, scalability, and maintainability Participate in code reviews, technical workshops, and sprint ceremonies Improve engineering practices (testing strategy, CI/CD, observability, performance) Requirements Min. 5+ years of commercial experience as a Backend / .NET Developer Strong command of C# and modern .NET (building production-grade services) Hands-on experience with Azure (e.g., Repos, Pipelines, Key Vault, App Insights or equivalent) Strong experience with SQL and relational databases (query optimization, data modeling) Solid understanding of backend best practices (Clean Code, SOLID, design patterns, API design) Proven ability to work with ambiguous problem spaces - creative, puzzle-solving mindset Comfortably designing solutions that are not fully specified and require independent ownership Fluent in Polish and advanced English (B2/C1) Nice to have : Experience with Snowflake and/or Microsoft Dynamics integrations Experience in data-heavy domains, prediction/selection logic, or operational tooling Strong observability mindset (logs, metrics, traces) Why join us? Rite NRG is a vibrant outsourcing technology company driven by the Right People , dedicated to empowering businesses through innovative software solutions. We focus on building strong partnerships and providing top-notch software solutions that drive real business growth. Our business model revolves around collaboration and delivering impactful results for our clients. Join us, and be part of a team where great minds, Right Energy , and strong partnerships come together to shape the future of technology! Stable, long-term, full-time collaboration Remote work within Poland and flexible working hours High engineering culture with a focus on growth and learning Multinational teams Benefits: Private medical care, Multisport card, and workation (work for a week from Barcelona or elsewhere)

🏢 Summary: B2B contract for a Java Developer to build and maintain secure, scalable backend services and workflow-driven processes for a leading bank. The role focuses on Java/Spring development, BPM engine implementation (Flowable or similar), REST integrations, and event-driven microservices in a banking environment. You will work on enterprise-grade systems supporting core banking products and internal operations. 🗂️ Requirements: 4+ years of commercial experience in Java backend development, Commercial experience with Flowable or other BPM engine (Camunda, Activiti, jBPM) in production, Experience with Spring (Boot, MVC, Data) and Hibernate, Strong knowledge of REST APIs and microservices architecture, Strong knowledge of SQL and relational databases (MS SQL or Oracle), Experience with message brokers or streaming platforms (Kafka or similar), Experience with Maven and Git, Fluency in Polish, Advanced English (B2/C1) 📃 Skills: Java, Spring, SpringBoot, SpringMVC, SpringData, SpringSecurity, Hibernate, Flowable, Camunda, Activiti, jBPM, BPMN, DMN, REST, Microservices, SQL, MSSQL, Oracle, Kafka, PubSub, Maven, Git, JUnit, Mockito 🏢 Description: Contract: B2B Rate: Mid: 110–130 PLN/h net + VAT, Senior: 120–140 PLN/h net + VAT Location: Remote within Poland Project: Development and maintenance of backend services and workflow-driven processes for a leading bank Project Overview Join our team as a Java Developer and work on a project for one of the leading banks. You will develop and maintain backend services, integrations, and business processes orchestrated in Flowable , supporting key banking products and internal operations. The project focuses on building secure, reliable, and scalable solutions used daily by thousands of customers and bank employees. You’ll collaborate closely with product and technical stakeholders, contribute to architecture discussions, and help continuously improve engineering standards and delivery practices. Key Technologies Backend: Java (Core Java), Spring (Spring Boot, Spring MVC, Spring Data, Spring Security), Hibernate Workflow: Flowable or Camunda/Activiti/jBPM (BPMN/DMN, process automation, integrations) APIs: REST API design & integration Databases: MS SQL, Oracle Messaging: Kafka / Pub/Sub (or similar) Tools: Maven, Git, JUnit, Mockito Responsibilities Design, develop, and maintain backend services in Java using Spring and Hibernate. Build and maintain workflow-driven solutions using Flowable (BPMN/DMN), including process modeling and implementation. Implement and integrate RESTful APIs with internal and external banking systems. Work in a microservices environment and support event-driven integrations (Kafka / Pub/Sub). Work with relational databases (MS SQL / Oracle): schema design, efficient queries, performance tuning. Write clean, testable, and well-documented code; create unit/integration tests (JUnit, Mockito). Troubleshoot production issues, debug incidents, and contribute to performance optimization. Collaborate with developers, QA, architects, analysts, and business stakeholders to refine requirements and propose technical solutions. Requirements 4+ years of commercial experience in Java development (enterprise/backend systems). Mandatory: Proven commercial experience with Flowable or another BPM/workflow engine (e.g., Camunda, Activiti, jBPM) used in production environments. Experience with Spring (Boot, MVC, Data; Security is a plus) and Hibernate. Solid understanding of REST APIs and microservices architecture. Strong knowledge of SQL and relational databases (MS SQL Server or Oracle). Hands-on experience with message queues/streaming platforms (Kafka, Pub/Sub, or similar). Practical experience with Maven and Git in daily development work. Fluency in Polish and an advanced level of English (B2/C1). Nice to have Banking/financial sector experience Familiarity with OAuth2 / OpenID Connect, security standards, and auditing Observability tools (logs/metrics/tracing), performance profiling Why join us? Rite NRG is a vibrant outsourcing technology company driven by the Right People . We are dedicated to empowering businesses through innovative software solutions. We focus on building strong partnerships and providing top-notch software solutions that drive real business growth. Our business model revolves around collaboration and delivering impactful results for our clients. Join us, and be part of a team where great minds, Right Energy , and strong partnerships come together to shape the future of technology! Stable, long-term, full-time collaboration. Remote work within Poland and flexible working hours. High engineering culture with a focus on growth and learning. Multinational teams. Benefits: Private medical care, Multisport card, and workation (work for a week from Barcelona or elsewhere).

🏢 Summary: Senior Backend Engineer role for a 3-month modernization project focused on upgrading Java and Scala backend services, migrating authentication systems to OAuth, and building large-scale Spark data pipelines. The position requires hybrid work in Warsaw or Kraków, with a fully covered onboarding period in Sweden. 🗂️ Requirements: 5+ years commercial backend experience, Strong production experience with Java, Strong production experience with Scala, Experience with Play Framework or Akka/Pekko, Hands-on experience with Spark, Experience with OAuth authentication, Professional English proficiency, Availability for 2-week onboarding in Sweden, Hybrid availability in Warsaw or Kraków office 3 days/week 📃 Skills: Java, Scala, Play, Akka, Pekko, Spark, OAuth, React, TypeScript, CI/CD, Gradle 🏢 Description: co.brick talents — powered by AI, powered by people. Senior Backend Engineer (Scala / Java) – 3-Month Project Salary: Up to 175 PLN/h net + VAT (B2B Contract) Location: Hybrid – Warsaw or Kraków ( strictly 3 days/week from the office – non-negotiable) Onboarding: 2 weeks on-site in Malmö, Sweden (fully covered) Project Duration: 3 months Start Date: ASAP/Beginning of August at the ABSOLUTE LATEST About the Client & Project On behalf of our client, an innovative company from the technology sector, we are looking for a Strong Senior Backend Developer to join a short-term, high-impact project. The main goal is to modernize and optimize core backend services, streamline data pipelines, and enhance system security. This is a highly autonomous role requiring a seasoned engineer who can jump straight into a complex ecosystem, utilize automation tools for framework upgrades, and handle heavy data migration tasks. Key Responsibilities Modernize and refactor backend services by upgrading legacy Java and Scala-based frameworks. Leverage automation and modern tooling to expedite code transformations, dependency resolution, and compatibility fixes. Migrate legacy authentication mechanisms across various services to secure, OAuth-based solutions. Consolidate multiple data stores into unified, versioned tables by designing and executing heavy Spark/Java batch pipelines. Requirements Minimum of 5 years of commercial backend experience (7+ years is highly preferred). Deep production experience with Java and Scala . Strong familiarity with Play Framework OR Akka (experience with Akka/Pekko is highly acceptable if you are ready to work with Play environments). Hands-on experience with Spark for complex, heavy data pipeline processing. Solid understanding and practical experience with OAuth authentication patterns. Excellent communication skills with Full Professional English (the project language is 100% English). Full availability for a 2-week onboarding trip to Sweden at the very start of the contract. Nice to Have Basic understanding or exposure to frontend technologies (React / TypeScript). DevOps mindset: familiarity with CI/CD pipelines, Gradle, and scripting. What We Offer A transparent, quick 2-stage recruitment process. An attractive hourly rate with seamless B2B invoicing. An opportunity to work on a high-exposure architectural modernization project for an international client.

🏢 Summary: Senior Backend Engineer role for a 3-month modernization project focused on upgrading Java and Scala backend services, migrating authentication systems to OAuth, and building heavy Spark-based data pipelines. The position requires hybrid work in Warsaw or Kraków with an initial onboarding in Sweden. 🗂️ Requirements: 5+ years commercial backend experience, Production experience with Java, Production experience with Scala, Experience with Play Framework or Akka/Pekko, Hands-on Spark experience, Experience with OAuth authentication, Professional English proficiency, Availability for 2-week onboarding in Sweden, Hybrid availability 3 days/week in Warsaw or Kraków office 📃 Skills: Java, Scala, Play, Akka, Pekko, Spark, OAuth, React, TypeScript, CI/CD, Gradle 🏢 Description: co.brick talents — powered by AI, powered by people. Senior Backend Engineer (Scala / Java) – 3-Month Project Salary: Up to 175 PLN/h net + VAT (B2B Contract) Location: Hybrid – Warsaw or Kraków ( strictly 3 days/week from the office – non-negotiable) Onboarding: 2 weeks on-site in Malmö, Sweden (fully covered) Project Duration: 3 months Start Date: ASAP/Beginning of August at the ABSOLUTE LATEST About the Client & Project On behalf of our client, an innovative company from the technology sector, we are looking for a Strong Senior Backend Developer to join a short-term, high-impact project. The main goal is to modernize and optimize core backend services, streamline data pipelines, and enhance system security. This is a highly autonomous role requiring a seasoned engineer who can jump straight into a complex ecosystem, utilize automation tools for framework upgrades, and handle heavy data migration tasks. Key Responsibilities Modernize and refactor backend services by upgrading legacy Java and Scala-based frameworks. Leverage automation and modern tooling to expedite code transformations, dependency resolution, and compatibility fixes. Migrate legacy authentication mechanisms across various services to secure, OAuth-based solutions. Consolidate multiple data stores into unified, versioned tables by designing and executing heavy Spark/Java batch pipelines. Requirements Minimum of 5 years of commercial backend experience (7+ years is highly preferred). Deep production experience with Java and Scala . Strong familiarity with Play Framework OR Akka (experience with Akka/Pekko is highly acceptable if you are ready to work with Play environments). Hands-on experience with Spark for complex, heavy data pipeline processing. Solid understanding and practical experience with OAuth authentication patterns. Excellent communication skills with Full Professional English (the project language is 100% English). Full availability for a 2-week onboarding trip to Sweden at the very start of the contract. Nice to Have Basic understanding or exposure to frontend technologies (React / TypeScript). DevOps mindset: familiarity with CI/CD pipelines, Gradle, and scripting. What We Offer A transparent, quick 2-stage recruitment process. An attractive hourly rate with seamless B2B invoicing. An opportunity to work on a high-exposure architectural modernization project for an international client.