Lead Full Stack .NET Developer

🏢 Summary: Long-term remote B2B contract for a technical leader responsible for guiding a development team in building and maintaining scalable applications within an agile environment. The role combines hands-on .NET development with strategic oversight, technical analysis, and quality management. Focus is on delivering robust, cloud-oriented solutions and improving application delivery speed. 🗂️ Requirements: Proficiency in .NET and C#, Experience in full-stack development, Experience with front-end technologies, Experience with document-based databases, Knowledge of event-based messaging frameworks, Experience with cloud services, Experience with containerization, Ability to lead development team, Experience in building scalable systems 📃 Skills: .NET, C#, Angular, MongoDB, Cloud, Docker, Messaging, SQL 🏢 Description: Work model: 100% remote Start date: 30.06.2026 Rate: 160-180 PLN/h netto + VAT Contract : B2B, long-term cooperation (12-month contract up front + extensions) Recruitment process : 2 stages, including a technical test estimated to take 2-4 hours. Summary: The role focuses on leading the development team to create new solutions and maintain systems within an agile environment, emphasizing the importance of robust applications and strategic direction. Main Responsibilities: Lead the development team in creating and maintaining applications. Adopt wider technology practices and address the speed of new application delivery. Engage in hands-on development while guiding the strategic direction of projects. Collaborate with teams to gather specifications and perform technical analysis. Navigate complex systems and ensure they are built to scale. Manage developer quality and capacity amidst organizational constraints. Key Requirements: Proficient in .NET and C#. Experience with full-stack development, including front-end technologies. Familiarity with document-based databases. Knowledge of event-based messaging frameworks. Experience with cloud services and containerization. Nice to Have: Prior experience in the banking or financial services sector. Familiarity with Angular or other modern front-end frameworks. Experience with MongoDB or similar environments. Other Details: Environment: .NET, C#, Angular, MongoDB, moving towards cloud solutions. Team Structure: Full Stack Developers working closely with Business Analysts.

🏢 Summary: 100% remote B2B opportunity to lead a development team in building and maintaining scalable applications within an agile environment. The role combines hands-on full-stack development with strategic technical leadership, focusing on robust system architecture and faster delivery of new solutions. Long-term cooperation with a two-stage recruitment process including a technical test. 🗂️ Requirements: Proficiency in .NET, Proficiency in C#, Experience in full-stack development, Experience with front-end technologies, Experience with document-based databases, Knowledge of event-based messaging frameworks, Experience with cloud services, Experience with containerization, Ability to lead development teams, Experience working in agile environment 📃 Skills: .NET, C#, Angular, MongoDB, Cloud, Docker, Microservices, REST, Git 🏢 Description: Work model: 100% remote Start date: Flexible Rate: up to 215 PLN/h netto + VAT Contract : B2B, long-term cooperation (12-month contract up front + extensions) Recruitment process : 2 stages, including a technical test estimated to take 2-4 hours. Summary: The role focuses on leading the development team to create new solutions and maintain systems within an agile environment, emphasizing the importance of robust applications and strategic direction. Main Responsibilities: Lead the development team in creating and maintaining applications. Adopt wider technology practices and address the speed of new application delivery. Engage in hands-on development while guiding the strategic direction of projects. Collaborate with teams to gather specifications and perform technical analysis. Navigate complex systems and ensure they are built to scale. Manage developer quality and capacity amidst organizational constraints. Key Requirements: Proficient in .NET and C#. Experience with full-stack development, including front-end technologies. Familiarity with document-based databases. Knowledge of event-based messaging frameworks. Experience with cloud services and containerization. Nice to Have: Prior experience in the banking or financial services sector. Familiarity with Angular or other modern front-end frameworks. Experience with MongoDB or similar environments. Other Details: Environment: .NET, C#, Angular, MongoDB, moving towards cloud solutions. Team Structure: Full Stack Developers working closely with Business Analysts.

🏢 Summary: 100% remote B2B contract for a senior Full Stack Developer to deliver and maintain enterprise applications, focusing on urgent project phases through July 2026. The role requires independent ownership of a client’s finance module and rapid delivery of high-quality, scalable, and secure solutions. Work includes both front-end and back-end development in a microservices-based architecture. 🗂️ Requirements: 10+ years of commercial experience, Strong experience in Java development, Strong experience with Spring Boot, Experience with microservices architecture, Experience with React.js, Full-stack development experience, Experience with REST APIs, Knowledge of integration patterns, Experience with cloud-ready applications, Ability to independently handle finance module 📃 Skills: Java, SpringBoot, Microservices, React, REST, APIs, Cloud, Integration, Fullstack 🏢 Description: 100% remote B2B: 180-190 zł/h netto + VAT Contract till end of July 2026 (chance of extension) Experience Level: 10+ years of experience Must be able to work independently and deliver quickly Must be able to independently handle the clients finance module Core Responsibilities: Develop and maintain both front-end and back-end components of enterprise applications Work on urgent deliverables for Phase 1 and potentially Phase 2 Collaborate with internal teams Ensure high-quality, scalable, and secure solutions within tight timelines Technical Skills Required: Java Spring Boot (including microservices architecture) React.js (front-end development) Strong understanding of full stack development principles Experience with REST APIs , integration patterns , and cloud-ready applications Familiarity with CI/CD pipelines , containerisation (Docker/Kubernetes) is a plus Soft Skills: Ability to work independently with minimal supervision Strong problem-solving and troubleshooting skills Excellent communication and collaboration skills What we offer: 100% remote Multisport card Private heatlhcare Life insurance

🏢 Summary: Lead .NET Engineer role combining hands-on backend development with technical leadership, owning architecture, core platform services, APIs, and payment integrations in a distributed AWS environment. The position includes defining technical direction, mentoring engineers, driving CI/CD and operational excellence, and promoting AI-assisted development practices. After a short onboarding period in the US, the role is fully remote with long-term engagement in a strategic product initiative. 🗂️ Requirements: 6–10+ years of experience building and operating production software systems, Experience in Technical Lead or Lead Engineer role, Strong backend development experience with C# and .NET, Experience designing and operating distributed systems and microservices, Strong SQL and database design skills, Hands-on experience with AWS (SQS, DynamoDB, S3, ECS, Lambda), Experience owning and improving CI/CD pipelines, Experience in payments, financial services, or regulated environments, Working knowledge of React or Vue 📃 Skills: C#, .NET, AWS, ECS, Lambda, SQS, DynamoDB, S3, SQL, Microservices, REST, CI/CD, React, Vue, AI 🏢 Description: Lead .NET Engineer Remote 140–160 PLN/h B2B Full-time (FTE) *Project starts with a 2–3 week onboarding and training period in the US, followed by fully remote work. About the role We are looking for an experienced Lead .NET Engineer to take ownership of a squad responsible for core platform services, APIs, and payment integrations. In this role, you will combine hands-on software engineering with technical leadership. You will define technical direction, partner with Product on roadmap delivery, mentor engineers, and help drive the adoption of AI-assisted development practices across the software delivery lifecycle. Responsibilities Own squad-level architecture and technical decision-making. Lead the design, development, and operation of backend services and APIs. Ensure high standards of code quality, performance, security, and reliability. Drive incident management and operational excellence. Collaborate closely with Product Managers and stakeholders to deliver roadmap priorities. Mentor engineers through coaching, technical guidance, and regular feedback. Participate in hiring and team growth activities. Promote and implement AI-assisted development tools and best practices. Contribute to continuous improvement of engineering processes, CI/CD, and platform capabilities. Must-have requirements 6–10+ years of experience building and operating production software systems. Proven experience in a Technical Lead, Lead Engineer, or similar leadership role. Strong backend development experience with C#/.NET. Working knowledge of frontend technologies such as React or Vue. Experience designing and operating distributed systems and microservice architectures. Strong SQL and database design skills. Experience working within payments, financial services, or other regulated environments. Hands-on experience with AWS services, including: SQS DynamoDB S3 ECS Lambda Experience owning and improving CI/CD pipelines. Strong communication and stakeholder management skills. Nice to have Experience building large-scale payment platforms or fintech products. Previous people-management responsibilities. Experience with platform modernization and cloud transformation initiatives. Experience implementing AI-powered engineering tools and workflows. Tech Stack C# .NET AWS ECS Lambda SQS DynamoDB S3 SQL Microservices REST APIs CI/CD React / Vue AI-assisted Development What we offer Long-term engagement in a strategic product initiative. High-impact technical leadership role. Opportunity to shape engineering standards and architecture. Exposure to modern AI-assisted development practices. International environment and collaboration with US-based teams. Fully remote work after onboarding period in the US.

🏢 Summary: Full Stack Development Lead role focused on delivering end-to-end solutions using React and C# .NET Core in a cloud-driven, microservices-based environment. The position combines hands-on development with architectural input and technical leadership in a fully remote B2B setup. The role involves close collaboration with cross-functional teams and contribution to modern DevOps and data workflows. 🗂️ Requirements: Proven full-stack experience with React, TypeScript, C# .NET Core, Strong knowledge of microservices architecture, Understanding of distributed systems, Experience with CI/CD pipelines, Experience with cloud platforms (Azure preferred), Experience with containers, Familiarity with DevOps practices, Ability to design APIs and event-driven components 📃 Skills: React, TypeScript, C#, .NET, Microservices, CI/CD, Azure, Docker, DevOps, PySpark, PowerBI, APIs 🏢 Description: Start Date: ASAP / Within 1 Month / Flexible Work Model: 100% remote Contract Type: B2B (160-180 PLN/h + VAT) We are looking for an experienced Full Stack Development Lead who will take ownership of end‑to‑end solutions across React and C# .NET Core while contributing to technical direction and supporting a collaborative engineering culture. This role is ideal for a strong Senior Full Stack Developer who is ready to expand into leadership responsibilities, work closely with cross‑functional teams, and influence architectural decisions in a modern, cloud‑driven environment. Expectations Proven experience in full‑stack development using React, TypeScript, and C# .NET Core. Good understanding of microservices , distributed systems, and CI/CD pipelines. Exposure to cloud platforms (Azure preferred), containers, and modern DevOps practices. Experience with data workflows (pyspark) or BI solutions (Power BI) is a strong advantage. Ability to collaborate with technical and business stakeholders and take initiative in solution design. Responsibilities Contribute to the design and delivery of full‑stack applications using React and C# .NET Core. Support architectural discussions around microservices, APIs, and event‑driven components. Collaborate with data engineers on pyspark workflows and Power BI reporting enhancements. Promote engineering best practices, code quality, and maintainable development patterns. Mentor team members and support planning, collaboration, and continuous improvement efforts. What We Offer Medicover healthcare package Multisport card Access to an e-learning platform Group life insurance

🏢 Summary: B2B contract role for an experienced Angular Tech Lead / Senior Developer to combine hands-on development with technical leadership in an international Agile environment. The position focuses on delivering high-quality, secure, and performant Angular applications while ensuring architectural consistency and reliable delivery. Available fully remote or hybrid (Wrocław) with competitive hourly rate. 🗂️ Requirements: Senior-level experience with Angular, Experience as Tech Lead or Senior Developer with leadership responsibilities, Strong knowledge of clean code principles, Strong understanding of software architecture, Knowledge of design patterns, Experience working in Agile/Scrum, Ability to conduct code reviews and ensure code quality 📃 Skills: Angular, .NET, Agile, Scrum, Architecture, DesignPatterns, CleanCode 🏢 Description: Start: ASAP / within 30 days / 1 month Rate: 150–170 PLN/hour + VAT Contract: B2B (via Experis) Location: 100% Remote or Hybrid (Wrocław) Role Summary We are looking for an experienced Angular Tech Lead / Senior Developer to combine hands‑on development with technical leadership . The role focuses on ensuring code quality, architectural consistency, and reliable delivery in an international Agile environment. Key Responsibilities Develop applications using Angular and review pull requests Ensure code quality, performance, and security Provide technical leadership, mentoring, and task coordination Support planning, estimation, and Agile ceremonies Collaborate closely with QA, UX, and other teams Requirements Senior‑level experience with Angular Experience as a Tech Lead or Senior Developer with leadership responsibilities Strong knowledge of clean code, architecture, and design patterns Experience working in Agile/Scrum .NET full‑stack experience is a strong advantage Benefits Private medical care (Medicover) Multisport card Access to an e‑learning platform Group life insurance

🏢 Summary: 12-month B2B contract for an experienced .NET Developer to design, develop, and enhance business-critical IT systems, combining software development with system and data analysis. The role involves building web applications, working with data warehouse processes, and translating business requirements into technical solutions in cooperation with stakeholders. Remote work with occasional visits to Łódź office. 🗂️ Requirements: Minimum 3 years of programming experience in IT projects, .NET and C# proficiency, Experience with SQL and SQL Server Integration Services, Experience with HTML and MVC.NET, Knowledge of JavaScript, jQuery, jQuery UI, HTML5, CSS3, Experience in web application development, Knowledge of Visual Studio Ultimate 2013, Understanding of unit testing and test automation, Knowledge of design patterns and object-oriented programming, Experience in designing and developing information systems for large-scale or financial institutions, Experience in business and system requirements analysis, English sufficient for technical documentation, Ability to work with Large Language Models 📃 Skills: .NET, C#, SQL, SSIS, HTML, MVC, JavaScript, jQuery, jQueryUI, HTML5, CSS3, VisualStudio, OOP, TestAutomation, LLMs 🏢 Description: PROJECT DETAILS: Contract B2B , 12 months + extensions Rate: up to 125 PLN/h nett + VAT Working model : remote with occasional visits to Łódź’s office (2 times per month) We are looking for an experienced .NET Developer to join a project focused on developing, implementing, and improving business-critical IT systems. This role combines hands-on software development with business and system analysis, data-related activities, documentation, testing, and cooperation with internal stakeholders and external vendors. The project involves IT systems that are partly based on Oracle technologies and data warehouse processes. The person in this role will work closely with business users to gather, analyse, and refine requirements, translate business concepts into clear system specifications, and support the delivery of high-quality technical solutions. RESPONSIBILITIES : Leading design and implementation activities within IT systems based on Oracle-related technologies. Developing and maintaining web applications using .NET, C#, SQL, HTML, JavaScript, jQuery, and related technologies. Cooperating with business users to gather, analyse, and clarify requirements for data and system solutions. Translating general business concepts into detailed functional and technical requirements. Participating in internal software testing and supporting test automation activities. Creating and updating technical and functional system documentation. Supporting the design of new solutions and contributing to future system development directions. Implementing improvements related to data quality across systems and applications, and exporting data to a data warehouse. Reviewing and providing feedback on technical specifications, project documentation, technical documentation, and administrative documentation prepared by external teams. Working with business stakeholders, internal clients, and external vendors. REQUIREMENTS : Minimum 3 years of programming experience in IT projects. Very good knowledge of .NET and C#. Experience with SQL, SQL Server Integration Services, HTML, and MVC.NET. Knowledge of JavaScript, jQuery, jQuery UI, HTML5, and CSS3. Experience in developing web applications. Knowledge of Visual Studio Ultimate 2013. Understanding of unit testing and test automation processes. Good knowledge of design patterns and object-oriented programming principles. Experience in designing and developing information systems for financial institutions or organisations with a similar scale, complexity, and IT quality requirements. Knowledge of business and system requirements analysis. Strong analytical thinking and the ability to formulate clear and precise conclusions. Ability to cooperate with business clients, internal stakeholders, and external suppliers. High level of independence, good work organisation, goal orientation, and consistency in task delivery. Strong communication skills, curiosity, and negotiation abilities. English is sufficient for working with technical documentation and professional literature. Ability to work with Large Language Models. Nice to Have Basic knowledge of UX design. Knowledge of Agile and XP methodologies. Knowledge of PL/SQL and Oracle databases. Practical experience with CASE tools, such as Sparx Systems Enterprise Architect. Knowledge of UML. Experience working in a matrix organisation. Knowledge of ITIL.

🏢 Summary: Senior .NET Developer role focused on designing, extending, and modernising critical banking and securities systems in a fully remote B2B model. The position involves full-stack development, system integration, and cloud scaling within distributed, business-critical environments. The role requires close collaboration with business stakeholders and ownership of end-to-end application delivery. 🗂️ Requirements: 5+ years experience as .NET / C# Developer, Experience in banking or investment banking sector, Full-stack development experience, Knowledge of SOLID design principles, Experience with document-based databases, Experience with event-driven messaging frameworks, Experience with unit and integration testing, End-to-end application development experience, Ability to work during UK business hours, Based in Poland 📃 Skills: .NET, C#, MongoDB, SOLID, Messaging, UnitTesting, IntegrationTesting, Docker, Kubernetes, Cloud 🏢 Description: Work model: 100% remote (candidates must be based in Poland) Contract type: B2B Industry: Banking / Investment Banking We are looking for an experienced Senior .NET Developer to join a distributed engineering team working on critical banking systems. The role focuses on extending and modernising applications used across securities and banking operations, with a strong emphasis on system design, scalability, and cloud transformation. You will work end-to-end on business-critical systems, closely collaborating with Business Analysts, without a separate QA team. A solid background in banking or financial services is essential. Main Responsibilities: Design, develop, and extend .NET-based systems supporting multiple banking entities Contribute to the integration of securities and core banking platforms Support and enhance a portfolio of ~17 applications across product control and risk management Work with an in-house development framework in a full-stack capacity Participate in scaling applications for cloud-based, containerized environments Collaborate closely with business stakeholders to deliver robust solutions Ensure high code quality through unit and integration testing Key Requirements: 5+ years of professional experience as a .NET / C# Developer Hands-on experience in the banking or investment banking sector (mandatory) Full-stack development experience (backend-focused, frontend included) Strong understanding and practical application of SOLID design principles Experience with document-based databases (e.g. MongoDB) Experience with event-driven / event-based messaging frameworks Solid knowledge of unit and integration testing Experience working end-to-end on applications (development, testing, support) Ability to work independently in a fast-paced, regulated environment Availability during UK business hours Nice to Have: Experience with cloud platforms and application migration to cloud Experience with container technologies (e.g. Docker, Kubernetes) Exposure to systems such as Murex or large in-house banking platforms Background in securities, risk, or product control systems Other Details: This role is 100% remote with candidates required to be located in Poland. The contract is on a B2B basis within the banking and investment banking industry.

🏢 Summary: Senior .NET Developer role focused on designing, extending, and modernizing critical banking systems within securities and core banking domains. The position involves full-stack development, system integration, and cloud scaling in a distributed team without a separate QA function. Work includes end-to-end ownership of business-critical applications in a regulated investment banking environment. 🗂️ Requirements: 5+ years experience with .NET and C#, Hands-on experience in banking or investment banking, Full-stack development experience, Strong knowledge of SOLID principles, Experience with document-based databases, Experience with event-driven messaging frameworks, Knowledge of unit and integration testing, End-to-end application development experience, Ability to work independently in regulated environments, Availability during UK business hours, Poland-based residency 📃 Skills: .NET, C#, MongoDB, SQL, REST, Microservices, Docker, Kubernetes, Azure, UnitTesting, IntegrationTesting, EventDriven, Git 🏢 Description: Work model: 100% remote (candidates must be based in Poland) Contract type: B2B Industry: Banking / Investment Banking We are looking for an experienced Senior .NET Developer to join a distributed engineering team working on critical banking systems. The role focuses on extending and modernising applications used across securities and banking operations, with a strong emphasis on system design, scalability, and cloud transformation. You will work end-to-end on business-critical systems, closely collaborating with Business Analysts, without a separate QA team. A solid background in banking or financial services is essential. Main Responsibilities: Design, develop, and extend .NET-based systems supporting multiple banking entities Contribute to the integration of securities and core banking platforms Support and enhance a portfolio of ~17 applications across product control and risk management Work with an in-house development framework in a full-stack capacity Participate in scaling applications for cloud-based, containerized environments Collaborate closely with business stakeholders to deliver robust solutions Ensure high code quality through unit and integration testing Key Requirements: 5+ years of professional experience as a .NET / C# Developer Hands-on experience in the banking or investment banking sector (mandatory) Full-stack development experience (backend-focused, frontend included) Strong understanding and practical application of SOLID design principles Experience with document-based databases (e.g. MongoDB) Experience with event-driven / event-based messaging frameworks Solid knowledge of unit and integration testing Experience working end-to-end on applications (development, testing, support) Ability to work independently in a fast-paced, regulated environment Availability during UK business hours Nice to Have: Experience with cloud platforms and application migration to cloud Experience with container technologies (e.g. Docker, Kubernetes) Exposure to systems such as Murex or large in-house banking platforms Background in securities, risk, or product control systems Other Details: This role is 100% remote with candidates required to be located in Poland. The contract is on a B2B basis within the banking and investment banking industry.

🏢 Summary: Frontend Developer role focused on building and maintaining front-end applications that consume REST APIs in a hybrid work model. The position involves coding in line with application requirements, debugging, and enhancing existing solutions while collaborating within a development team. The role requires strong technical expertise in Angular and related technologies, along with effective communication in an international environment. 🗂️ Requirements: Experience with Angular Framework, Strong knowledge of TypeScript, Strong knowledge of JavaScript, Ability to consume and render data via REST APIs, Expertise in Hadoop, Expertise in MapReduce, Ability to reuse existing code in new applications, Fluent English 📃 Skills: Angular, TypeScript, JavaScript, REST, Hadoop, MapReduce, APIs 🏢 Description: General info: Model of work: hybrid (2-3 times per week work from office in Łódź) Type of contract: B2B contract Rate: 80 - 100 PLN net + vat/h Overview We are seeking a skilled Frontend Developer to design, create, and maintain front-end applications that effectively consume REST APIs. The ideal candidate must demonstrate strong communication skills and the ability to explain complex technical topics to non-technical audiences. This role involves ensuring that application code meets all requirements, along with debugging and enhancing application procedures. Main Responsibilities: Designing, creating, and maintaining front-end applications to consume REST APIs. Writing code in accordance with application requirements. Collaborating as part of a software development team to meet standards. Explaining complex technical concepts in clear language. Debugging applications to ensure functionality. Making suggestions for application enhancements and infrastructure improvements. Contributing to a positive work environment through effective teamwork. Key Requirements: Excellent communication skills to build trust with team members and stakeholders. Experience with Angular Framework. Strong knowledge of TypeScript and JavaScript. Ability to consume and render data via APIs. Capability to reuse existing code in new applications. Expertise in Hadoop and MapReduce. Fluent English is a must (daily communication in international environment) Nice to Have: Experience in similar financial institutions or environments. Knowledge of additional programming languages or frameworks. Understanding of DevOps practices.