New offer - be the first one to apply!
June 24, 2026
Senior Java Developer
Senior • Hybrid
160 - 180 PLN/hr
Krakow, Poland
Join our client's team as a Senior Java Developer!
Responsibilities
- Participation in full development cycle: from requirements and specification up to architecture, development and system tests
- Implementation of new functionalities
- Maintenance of existing code
Requirements
- Very good knowledge of Java 21
- Experience with Hibernate and Spring, Spring Boot frameworks
- Understanding relational databases, especially MariaDB
- Linux skills on user level or higher
- Knowledge and ability to work with version control system Git
- Advanced technical English skills
- Experience with cloud-based architectures and platforms such as Kubernetes
- Comfortable using AI tools (coding assistants, LLMs) as part of your daily workflow
Nice to Have
- Experience with making software for telecommunication systems
- Familiarity with concepts of SDN, Segment Routing, and OpenFlow
- Operational experience with enterprise-class routers and switches
- Knowledge of protocols such as IPv4/6, DNS, BGP, DHCP, SR and ZTP
- Knowledge of automation tools such as Ansible and Terraform
- Understanding of Linux and K8s networking (e.g. 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 or Warsaw (1 time a week in the office)
- Support of a dedicated mentor with a focus on direct communication
- Events and integration meetings, as well as participation in various initiatives, e.g., sports
- Access to benefits (medical care, Multisport card)
Recruitment Process
- Application and CV submission with initial phone contact after review
- Screening conversation about your experience
- Explanation of the recruitment process and ongoing contact throughout the process
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Available at Mid and Senior levels with increasing scope of ownership and strategic impact. 🗂️ Requirements: Minimum 4 years of IT project management experience (Mid) or 6+ years (Senior), Proven delivery of IT projects on time, within budget and scope, Experience in multi-team Agile environments, Practical experience with Scrum and/or Kanban, Experience coordinating cross-functional technical teams, Experience owning and managing project budgets, Experience in cost planning, tracking, forecasting and reporting, Experience managing vendors and contractual deliverables, Demonstrated risk identification and mitigation, Experience with unit and integration testing processes, Advanced Jira proficiency, Strong Confluence experience, Experience with delivery metrics (velocity, lead time, cycle time, throughput), English proficiency minimum B2 📃 Skills: Jira, Confluence, Agile, Scrum, Kanban, AI, Testing, Metrics, PMP, PRINCE2, SAFe, Forecasting, Budgeting, Reporting 🏢 Description: Join the client's team in the telco industry.. RESPONSIBILITIES Lead IT projects from initiation through delivery and closure. Coordinate delivery across Product Owners, Engineering Leads, Architects, QA Engineers, and business stakeholders. Plan and maintain project roadmaps aligned with business strategy. Support backlog prioritization and refinement in collaboration with Product Owners. Proactively identify, assess, mitigate, and escalate project risks. Own project budgets, including planning, tracking, forecasting, and financial reporting. Manage vendor costs, deliverables, and contractual commitments. Provide executive-level status reporting and decision support. Facilitate communication and expectation management across technical and business stakeholders. Leverage AI tools to improve project documentation, reporting, communication, and risk analysis. Maintain structured project documentation and knowledge management in Jira and Confluence. REQUIREMENTS Minimum 4 years of experience managing IT projects (Mid level) or 6+ years managing complex IT projects (Senior level). Proven track record of delivering projects on time, within budget, and within agreed scope. Experience working in multi-team Agile environments. Practical experience with Scrum and/or Kanban methodologies. Experience coordinating delivery across multiple teams. Experience owning project budgets. Experience planning, tracking, forecasting, and reporting project costs. Ability to present financial status clearly to senior stakeholders. Experience managing vendor costs and contract deliverables. emonstrated experience in proactive risk identification and mitigation. Ability to build and execute risk mitigation plans. Experience presenting risks in concise, action-oriented formats. Track record of preventing delivery issues through early intervention. Experience with unit and integration testing and a quality-focused mindset. Experience communicating with both technical and non-technical audiences. Ability to facilitate decision-making and manage stakeholder expectations. Experience reporting to senior leadership. Advanced Jira proficiency. Strong Confluence experience. Experience with delivery metrics such as velocity, lead time, cycle time, and throughput. English language proficiency at B2 level minimum (C1 preferred). Senior-level candidates should additionally demonstrate: Ownership of large-scale or multi-team delivery initiatives. Full ownership of project budgets and forecasting processes. Direct communication with senior management and directors. Driving delivery improvements and process optimization. Practical implementation of AI-enabled project management practices. NICE TO HAVE Telecommunications industry experience. Technical background that supports effective collaboration with engineering teams. PMP, PMI-ACP, PRINCE2, or similar project management certifications. SAFe framework awareness. Experience supporting digital transformation initiatives. Practical experience using AI-assisted project management tools. WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract. Hybrid work from Warsaw (1-2 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, life insurance, 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. Aleksandra Mazur Junior IT Delivery Consultant aleksandra.mazur@speedapp.pl +48 728 360 029
Technology
speedapp
Senior .Net Developer
Senior
Hybrid
Warsaw, Poland
🏢 Summary: The role involves designing and building high-scale infrastructure and platform solutions in .NET 8 for a global travel-tech product used by millions of users. The position focuses on developing a new architecture for internet-scale systems with an emphasis on innovation and continuous improvement. It includes end-to-end solution design and deployment in large-scale production environments. 🗂️ Requirements: 5+ years of experience with .NET Core and C#, Strong foundation in computer science, Strong knowledge of object-oriented design, Knowledge of design patterns, Knowledge of algorithms and data structures, Experience designing end-to-end solutions for internet-scale systems, Experience with large-scale production environments, Good understanding of SQL Server, Good understanding of Redis, Fluent English (written and verbal) 📃 Skills: .NET, C#, SQL, SQLServer, Redis, Kubernetes, Docker, Elasticsearch, CI/CD, NoSQL 🏢 Description: Join the client's team in the travel-tech industry.. RESPONSIBILITIES In this role, the infrastructure and platform used daily by millions of travelers worldwide will be designed and built. The focus is on full transparency, continuous improvement, innovation, and maximizing the use of technology. The team will be responsible for designing and developing a new architecture in .NET 8 to support high-scale products. REQUIREMENTS A solid foundation in computer science and strong competencies in object-orienteddesign, design patterns, algorithms, and data structures, with solid developmentexperience in .NET Core / C# - At least 5+ years experience. Thrive in a fast-paced environment, able to adapt and learn new technologies quickly. Hands-on experience designing, developing, and deploying end-to-end solutions for internet-scale problems. Good understanding of SQL Server and Redis. Experience with large-scale production environments. Excellent communication skills, initiative, and teamwork. High level of communication skills (written and verbal) in English NICE TO HAVE Experience in travel tech. Working with CI/CD is an advantage. Experience with containers and Kubernetes. Experience with NoSQL databases (like Elasticsearch) WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract. Hybrid work from Warsaw (2 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, life insurance, 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. Aleksandra Mazur Senior IT Research Consultant aleksandra.mazur@speedapp.pl +48 728 360 029
Technology
speedapp
Senior .Net Developer
Senior
Hybrid
Warsaw, Poland
🏢 Summary: B2B role to design and build high-scale infrastructure and platform solutions in .NET 8 for a global travel-tech product used by millions of users. The position focuses on developing a new architecture and delivering end-to-end solutions for internet-scale systems in a fast-paced environment. 🗂️ Requirements: 5+ years of commercial experience with .NET Core and C#, Strong foundation in computer science, Proficiency in object-oriented design, Knowledge of design patterns, Knowledge of algorithms and data structures, Experience designing end-to-end internet-scale solutions, Experience with large-scale production environments, Good understanding of SQL Server, Good understanding of Redis, Fluent English (written and verbal) 📃 Skills: .NET, C#, SQL, SQLServer, Redis, OOP, DesignPatterns, Algorithms, DataStructures 🏢 Description: Join the client's team in the travel-tech industry. RESPONSIBILITIES In this role, the infrastructure and platform used daily by millions of travelers worldwide will be designed and built. The focus is on full transparency, continuous improvement, innovation, and maximizing the use of technology. The team will be responsible for designing and developing a new architecture in .NET 8 to support high-scale products. REQUIREMENTS A solid foundation in computer science and strong competencies in object-orienteddesign, design patterns, algorithms, and data structures, with solid developmentexperience in .NET Core / C# - At least 5+ years experience. Thrive in a fast-paced environment, able to adapt and learn new technologies quickly. Hands-on experience designing, developing, and deploying end-to-end solutions for internet-scale problems. Good understanding of SQL Server and Redis. Experience with large-scale production environments. Excellent communication skills, initiative, and teamwork. High level of communication skills (written and verbal) in English NICE TO HAVE Experience in travel tech. Working with CI/CD is an advantage. Experience with containers and Kubernetes. Experience with NoSQL databases (like Elasticsearch) WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract. Hybrid work from Warsaw (2 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, life insurance, 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. Aleksandra Mazur Senior IT Research Consultant aleksandra.mazur@speedapp.pl +48 728 360 029