backend developer English-speaking jobs in Zielona Góra

Cost Engineer will define project scope, develop cost estimating relationships, and collect/monitor data. Requires a Bachelor's Degree in Engineering, 5+ years of experience in cost engineering, and proficiency in MS Excel and CATIA.

Develop Java backend applications using Spring Boot 3 and design/maintain RDBMS systems. Build and maintain front-end applications using React 18+ and TypeScript. Contribute to cloud-native application development in Azure, preferably with Terraform.

Senior Business Analyst to lead end-to-end Business Analysis, testing, and program delivery for Worldlink products. Manages program execution following the SDLC process. Communicates project progress to Senior Management. Requires proven project management experience in the financial sector and experience in Payments, ISO standards, and JIRA is desirable.

Senior AI Engineer will design, build, and deliver production-grade AI components for LLM gateways, agentic workflows, and RAG pipelines. Responsibilities include implementing LLM-based workflows, refining agentic solutions, and writing clean, well-tested Python code. The role requires strong experience with LLM applications, RAG pipelines, embeddings, and retrieval systems, as well as proficiency in Python, distributed systems, and containerized deployment.

UX Designer will define project assumptions, analyze requirements, and create mockups and prototypes for mobile and web apps. Must have proficiency in UX design tools (Figma, FigJam, Miro) and graphic design software (Adobe Photoshop). Experience executing commercial projects independently and strong communication skills are required.

Private Doctor providing clinical continuity, acute care, and chronic condition management to a UHNW Principal on a private yacht in the Mediterranean. Requires Western medical degree, 5+ years post-specialization, and experience in private medicine.

Software Developer to design, develop, and implement .NET solutions and PowerShell scripts for automation. Responsibilities include monitoring systems, resolving issues, applying patches, and providing support. Requires 6+ years IT experience, 4+ years in .NET maintenance, and proficiency in Visual Studio, IIS, Azure DevOps, PowerShell, and MS SQL Server. Must have a Bachelor's degree in Computer Science or related field and English proficiency (C1 level).

Senior Network & Security Engineer will design, implement, and troubleshoot WAN networks. Experience with SD-WAN, Cisco DNA-Center, and cloud networking is required. Must have strong knowledge of routing protocols, security protocols, and network management protocols.

QA Engineer will design and execute test cases, identify defects, and contribute to automated test suites using Selenium or similar frameworks. Collaborate with engineering, product delivery, and business analysis teams to ensure high-quality software delivery.

Provides technical services on Merchant Automation systems, including troubleshooting, installation, maintenance, and repair. Requires a strong technical foundation in Marine Automation and control systems.

QA Engineer will test a web application based on user stories, perform exploratory testing, and automate test cases. Responsibilities include finding and reporting bugs, translating user stories into test cases, and working with development teams. Experience with SQL databases, testing methodologies, and bug identification is required.

Software Development Engineers build cloud-native services and automation for Ring's firmware CI/CD platform. They design infrastructure-as-code, develop tooling, and collaborate with firmware development teams.

The Markets Lead will drive commercial planning for Central and Eastern European markets through data-driven forecasting and cross-functional collaboration. This role connects demand planning, market needs, and marketing investments, ensuring marketing spend aligns with overall market strategy.

As an HR Business Partner, you will support business transformation and growth by aligning HR initiatives with business objectives. You will partner with leaders and teams across multiple offices, driving cultural shifts and organizational design changes. Responsibilities include managing employee engagement, performance reviews, compensation reviews, talent development, and change management initiatives.

Senior Lead Generation Manager to build outbound engine for a specialized executive search firm focused on Web3, blockchain, crypto, and private capital. Define ideal client profiles, research market activity, and build structured prospect lists and outreach sequences. Design and refine a scalable outbound approach, establish systems for sustainable lead generation, and craft personalized outreach campaigns. Track hiring trends, identify companies raising funding, and continuously test and refine outreach strategies. Proven track record generating qualified leads within recruitment, executive search, or headhunting required. Strong senior-level experience with LinkedIn prospecting and outreach, engaging C-level and executive stakeholders, and understanding of recruitment firm sales processes. Ability to design strategy and build systems, not just execute outreach. Strong written English communication skills and independent, structured, and proactive working style.

The Chief Financial Officer will build and maintain financial dashboards, tenant CRMs, and consolidated financial reports. Responsibilities include managing cash flow, performing audits, overseeing subsidiary companies, and coordinating with international CPAs.

Drive BI development and serve as a trusted contact for financial stakeholders. Build and enhance BI solutions using SAP BW/4HANA, SAP Datasphere, and SAP Analytics Cloud. Support BI migration projects and rollouts within the financial domain.

Operates the "CISO Release Management" service, ensuring best practices for smooth transitions into production. Identifies, collects, and bundles CISO change items, verifying compatibility and assessing impact. Builds and maintains release plans, performs quality assessments, and monitors risks associated with non-compliance to the SDLC. Provides support when SDLC IT controls fail and reinforces the usage of good release practices. Drives initiatives to address identified gaps within the domain, ensuring alignment with organizational standards.

AI Engineer / Machine Learning Engineer needed to design, deploy, and maintain AI models in production. Responsibilities include building scalable ML pipelines, automating model deployment, and ensuring reliability of AI systems. Requires Python, MLOps tools, Docker, CI/CD, and experience deploying models to production.

Senior .Net Developer will design and implement distributed systems and microservice-based architectures. Responsibilities include developing containerized services, designing gRPC-based communication, and building event-driven architectures. Requires a Master's or Bachelor's degree in a technical field and at least 6 years of experience as a software developer.