18 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.

Join to apply for the Salesforce DevOps (freelance) role at PwC Polska 3 days ago Be among the first ... 25 applicants Join to apply for the Salesforce DevOps (freelance) role at PwC Polska Get AI-powered advice ... We are looking for: Salesforce DevOps (freelance) Your future role: Operate, support and improve the

Join to apply for the Salesforce DevOps (freelance) role at PwC Polska 3 days ago Be among the first ... 25 applicants Join to apply for the Salesforce DevOps (freelance) role at PwC Polska Get AI-powered advice ... We are looking for: Salesforce DevOps (freelance) Your future role: Operate, support and improve the

Join to apply for the AI Engineer (freelance) role at PwC Polska We help our Clients define their transformation ... We are looking for: AI Engineer (freelance) We are developing an advanced tourism platform that utilizes

We are looking for: Project Manager (freelance) Your future role: Take full responsibility for project

Join to apply for the AI Engineer (freelance) role at PwC Polska We help our Clients define their transformation ... We are looking for: AI Engineer (freelance) We are developing an advanced tourism platform that utilizes

We are looking for: Project Manager (freelance) Your future role: Take full responsibility for project

Form of cooperation: freelance project-specific B2B contract with an estimated duration through the end

•Our flexible offering enables you to freelance part time or full time even alongside an end customer

In this freelance role, you will provide strategic scientific input across key clinical development activities

In this freelance role, you will provide strategic scientific input across key clinical development activities

Leadership & Collaboration Mentor and guide freelance designers, agencies, and internal contributors—raising

Freelance Software Developer (Java) - AI Trainer [REX] Senior Full-stack Software Engineer (React + .

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

Freelance Software Developer (Java) - AI Trainer [REX] Senior Full-stack Software Engineer (React + .