freelance English-speaking jobs in Kalisz

Senior Software Engineer designs and develops distributed back-end applications in Google Cloud. Responsibilities include architecture, integration, testing, and operations of Python-based product audience management.

Senior Backend Engineer will design and implement scalable solutions for the Models platform, improving reliability and performance. Responsibilities include addressing technical debt, collaborating with cross-functional teams, and leading technical initiatives in Python.

Network Engineer needed for a strategic project migrating and modernizing a global F5 load balancer estate. Responsibilities include designing infrastructure migrations, building automation solutions, and collaborating with engineers and developers. Requires strong Python and API development skills, experience with Terraform, Ansible, Bash, and Jenkins, and familiarity with F5 load balancers and virtualization platforms. Fluent English required.

Senior Software Business Analyst to translate business requirements into technical specifications for a SaaS platform focused on AI-driven process mining and analytics.

Execute aligned omnichannel marketing strategy, adapting global campaigns to local needs. Plan, track, and report on marketing activities, translating business targets into communication measures. Manage marketing budget and collaborate on new campaign concepts and loyalty program execution.

Planner 5D seeks an experienced Android Engineer to develop next-generation mobile experiences. Responsibilities include building custom views and APIs, optimizing performance, and experimenting with new features. Requires 7+ years of Android development experience, proficiency in Kotlin and Java, and understanding of Android frameworks, libraries, and best practices.

Software Architect to design, develop, and maintain large enterprise applications, focusing on security, scalability, and industry best practices. Collaborate with cross-functional teams in an Agile environment to deliver high-quality solutions.

Senior Security and Network Specialist will maintain, secure, and improve internal firewall infrastructure (Fortinet FortiGate) and enterprise network (HPE/Aruba switching). Requires 5+ years of hands-on experience in firewall administration (preferably Fortinet FortiGate) and strong practical knowledge in network infrastructure management, especially with HPE and Aruba switches/Wifi.

This 16-month Software Engineer Traineeship combines training, mentorship, and real-world projects. The program includes an 18-week bootcamp focused on Java development and a year of on-the-job training.

Senior Performance Engineer needed for a financial project focused on Java/WebLogic applications. Responsibilities include performance testing, optimization, and monitoring. Requires experience with JMeter, AppDynamics, and WebLogic application optimization.

Implement and customize Salesforce solutions for insurers and banks. Configure, integrate, and customize Salesforce software to meet client needs. Create, design, and implement state-of-the-art solutions. Work directly with clients as an active member of an agile project team.

Senior Python Developer needed for a growing technology department. Must have experience with Python 2.x or 3.x, a Python web framework (Django, Flask, or FastAPI), Git, and strong English communication skills. Experience with additional frameworks, front-end technologies, and multi-process architecture is a plus.

Senior Python Developer will implement and maintain fintech projects, programming business logic, APIs, and data models. Responsibilities include conducting code reviews, participating in feature design, and working on operations and deployments.

Senior Project Manager / Release Train Engineer orchestrates software development projects within a SAFe/Agile environment. Responsible for end-to-end delivery, including planning, execution, risk management, and stakeholder communication. Leads multiple Agile teams, ensuring alignment with business objectives and value realization. Facilitates SAFe ceremonies and promotes continuous improvement. Requires 7+ years of software development project management experience, Agile expertise, and strong technical understanding.

Leads the execution of RTR processes, ensuring compliance and accuracy. Manages balance sheet reconciliations, reviews financial results, and supports global consolidation and reporting. Drives continuous improvement and develops team members. Requires 5+ years of accounting experience, fluency in English, and proficiency in Microsoft Office Suite.

Product Owner with Project Management skills needed to support strategic fixed-price projects. You will guide projects within defined scope, budget, and timeline, working closely with clients from the DACH region, Poland, and the United States. Responsibilities include conducting business needs analysis, facilitating client workshops (primarily in German), and managing the full Software Development Life Cycle.

Senior Node.js Developer will join a fintech company's product team (CFT, CV3, or CDP) and work on projects including post-trade execution systems, position reporting, and shared elements for interconnected projects. Must have at least 5 years of commercial experience with Vue.js and good understanding of JavaScript.

Senior Engineering Manager will define and execute the team's technical strategy, overseeing end-to-end engineering projects and building a high-performing team. Requires 7+ years of software development experience, including 3+ years leading engineering teams, and a proven track record of leading data-intensive SaaS product development.

Senior IT Recruiter needed for end-to-end recruitment of engineering and R&D talent. Requires 5+ years of IT recruitment experience, sourcing expertise, and proficiency in ATS (Zoho Recruit preferred). Fluency in Polish and English is essential.

Lead Backend Developer (Go/Kotlin) will design and develop scalable microservices, take ownership of infrastructure provisioning using Terraform, and migrate data from a legacy PHP monolith to Cloud SQL/Spanner.