7 freelance English-speaking jobs in Łódź Voivodeship

We are looking for a Senior Backend Developer to join our Optimization Team at Programmers Force. In this role, you will focus on optimizing backend systems for performance, scalability, and efficiency while working on large-scale, high-traffic workloads. Your responsibilities will include refactoring backend code, improving database queries and indexing, troubleshooting bottlenecks, and collaborating with cross-functional teams to scale backend architecture. You will ensure systems remain secure, reliable, and efficient while mentoring junior team members and enhancing test coverage. The ideal candidate has 4+ years of backend development experience with strong expertise in PHP (Laravel), Node.js, Python, MongoDB, and relational databases (MySQL, PostgreSQL). You should also be proficient in API development (REST/GraphQL), performance optimization, Docker, Git, and CI/CD practices. Experience with Redis, RabbitMQ, AWS/Azure, and backend security best practices will be considered a plus.

We are hiring a Senior Frontend Developer to join our Feature & Product Enhancements Team at Programmers Force. In this role, you will be responsible for building and optimizing modern web applications, ensuring seamless performance, responsiveness, and scalability across devices. You will work closely with product, backend, and design teams to deliver user-centric, high-quality web interfaces while contributing to new feature development, UI/UX enhancements, and frontend performance optimization.

We are hiring a Senior Backend Developer to join our New Initiatives Team at Programmers Force. In this role, you will be responsible for building MVPs, prototypes, and innovative product features from scratch, while designing scalable backend systems and collaborating with cross-functional teams in a fast-paced environment. The ideal candidate is experienced in backend development, API design, and rapid experimentation, with a strong ability to deliver secure, maintainable, and scalable solutions.

We are looking for a Senior SQA Engineer to join Programmers Force and take ownership of both manual and automated testing across our platforms. In this role, you will design, implement, and optimize test strategies to ensure speed, accuracy, and reliability while collaborating closely with development teams in a fast-paced, client-driven environment. The ideal candidate is experienced in automation frameworks, API testing, CI/CD integration, and manual testing, with a strong focus on quality and continuous improvement.

KOL / SME for Internal Medicine Medical Consultant - Freelance KOL / SME for Neurology (Pain Specialist ... Fluid Dynamics Associate Engineer R&D Electrical Transient Simulation Engineer Medical Consultant - Freelance

Overview Job Description Responsibilities Site Leadership: Take full ownership of the site, acting as the lead manager responsible for day-to-day operations. Programme Management: Ensure the project runs to schedule, coordinating trades and subcontractors to meet key milestones.

Expat Opportunity - Based in Copenhagen Project Engineer Construction - Relocation to the Netherlands Freelance