backend developer English-speaking jobs in Płock

Java Developer will analyze requirements, design technical solutions, and implement functionalities for CLC applications supporting wholesale client onboarding and review processes. The role requires proficiency in Java, Spring, and Git, familiarity with the technical stack (Kubernetes and Azure knowledge is a plus), and weekend release support.

Application Security Engineer will partner with product teams to identify, analyze, and mitigate security vulnerabilities throughout the software development lifecycle. Responsibilities include threat modeling, code reviews, vulnerability triage, and collaborating with development teams to enhance application security. Requires 2+ years of application security experience, knowledge of secure development processes, and deep understanding of web application security mechanisms and vulnerabilities.

Lead a team of engineers building internal tooling and features to enhance player engagement and retention. Responsibilities include team management, technical oversight, process execution, and strategy contribution.

Develop automated test scripts using Playwright and TypeScript for ecommerce solutions. Design and execute regression tests across multiple environments. Validate website user journeys and investigate/analyze failures. Report and track defects clearly and accurately. Collaborate in Agile teams and communicate with cross-functional teams.

Senior Software Systems Engineer will design, build, and own moderately complex services and components. Responsibilities include writing clean, testable code, ensuring quality through testing and CI/CD, and collaborating with teams to refine requirements and deliver iteratively.

Data Scientist (Senior) for fixed-term maternity cover (May 2026 - December 2027). Focus on delivering Data Science, AI, and automation solutions based on people data. Requires experience with Snowflake, SQL, Python, Tableau, and delivering Data Science solutions in a business analytics context.

Lead the SAP-FSCM Finance Platform product team, translating business requirements into solutions for credit, collections, and dispute management.

Experienced RTR Subject Matter Expert needed for a Global Finance Service Centre in Gdańsk. Responsibilities include processing journal entries, cost allocations, balance sheet reconciliations, and supporting access control. Requires 3+ years of RTR/financial accounting experience, strong accounting knowledge, and proficiency in MS Excel.

Category Manager responsible for footwear range selection, pricing, trading performance, and stock risk management. Develops and implements category strategies, analyzes results, and manages supplier relationships. Requires 3+ years of experience in buying or category management, preferably in footwear, with a proven track record.

Provides functional and technical support to users of a web-based platform, including troubleshooting and onboarding assistance. Coordinates client introductions to the platform, manages access administration, and acts as a liaison between business, operations, IT, and product stakeholders. Requires 3-4 years of experience in financial institutions, fluency in Spanish and English, and strong analytical and communication skills.

Capital.com seeks an AI Integration Specialist to drive AI adoption and automation across internal operations. This role involves identifying automation opportunities, leading AI initiatives, and contributing to AI governance. The ideal candidate has 3+ years of experience in cross-functional technology initiatives, a solid understanding of AI concepts and integration approaches, and strong analytical and communication skills.

Develop, debug, and optimize C/C++ code for embedded Linux and RTOS platforms. Implement APIs, kernel modules, and device drivers. Integrate open-source components and participate in Computer Vision feature integration.

Junior Investment Proposal Specialist will coordinate and produce RFPs, RFIs, and DDQs for clients, collaborating with subject matter experts to present investment capabilities. Requires investment knowledge, advanced Excel skills, and strong communication and project management abilities.

Develop and maintain backend systems, optimize database performance, and participate in the full software development lifecycle.

Senior SMM Manager to own and scale social media channels (Facebook, Instagram, TikTok, YouTube Shorts, X, Threads) for a fast-growing travel-tech startup. Focus on TikTok and Instagram content creation, using AI tools for ideation, scripting, and visual production. Track social media performance and build reporting dashboards. Must have proven experience growing social media accounts and strong video editing skills. Advanced English required.

Build, evolve, and stabilize web platforms using Node.js and JavaScript. Design and maintain backend and frontend architecture, ensuring performance, scalability, and reliability. Deliver new features end-to-end, optimize applications, and write unit, integration, and end-to-end tests.

Senior full-stack engineer to build and ship AI-first products. Expertise in TypeScript, React, Next.js, Node.js, and Postgres required. Strong UI/UX instincts and experience in high-autonomy environments essential.

Supports VAT reporting compliance for specific markets, preparing VAT returns and other indirect tax filings. Provides technical support on indirect tax matters and performs transactional reviews to ensure compliance. Collaborates with stakeholders on VAT-related inquiries and identifies opportunities to improve VAT processes.

Leads and develops a FP&A team, owns planning processes, and acts as a strategic business partner to senior leadership. Drives performance management, collaborates cross-functionally, and strengthens FP&A processes. Requires 7-10 years of finance experience with FP&A, 4+ years in people management, and fluency in English and Polish.

Cloud & AI Security Engineer will implement, operate, and maintain security controls for cloud platforms and AI workloads. Responsibilities include configuring cloud security tools, supporting secure cloud service design, and implementing security controls for AI/ML platforms. Requires a Bachelor's degree and 3+ years of experience in security engineering, cloud security, or related roles. Hands-on experience with at least one major cloud platform (AWS, Azure, or GCP) is required.