20 English-speaking jobs in Częstochowa

Senior Backend Engineer to architect a massive-scale simulation platform. Own the compute layer bridging on-prem HPC clusters with AWS infrastructure. Requires depth in Java, C++, or Python, plus experience with AWS, Kubernetes, and Terraform.

Senior Software Engineer to design and implement real-time fraud decisioning services and APIs in Kotlin or Python. Build platform tooling to scale fraud protection across new international markets. Requires 5+ years building backend systems at scale using Python or Kotlin.

Senior Data Engineer to design and scale cloud data platforms using Azure, Databricks, and Spark. Responsibilities include building production-grade pipelines, driving data architecture, and optimizing workflows. Requires 4+ years of experience and strong Python/SQL skills.

Senior Software Engineer to build and implement real-time fraud decisioning services and APIs in Python or Kotlin. This role extends the Fraud Decisioning System to new international markets. Requires 5+ years building backend systems at scale.

Senior Data Engineer to contribute to a banking platform for a Japanese financial group. Responsibilities include designing ETL pipelines, building integrations (APIs, SQL, S3, SFTP), and ensuring data accuracy. Requires 5+ years ETL experience and Python skills.

Security Specialist - Penetration Tester role involves identifying and investigating security vulnerabilities. Responsibilities include contributing to testing methods, creating reports, and mentoring. Requires 3+ years in web/infrastructure penetration testing.

Senior Data Scientist role focusing on LLM Clinical NLP. Build and improve LLM/transformer pipelines to extract structured data from clinical notes. Requires hands-on NLP with BERT/RoBERTa and generative LLMs.

Appian Developer to build and maintain applications using the Appian low-code platform. Responsibilities include designing SAIL interfaces, workflows, and integrating with external systems via REST/SOAP APIs. Requires experience with Appian objects, SQL, and deployment.

Senior Data Engineer to design and scale cloud data platforms using Azure, Databricks, and Spark. Responsibilities include building production-grade pipelines, driving data architecture, and implementing DataOps practices. Requires 4+ years of Data Engineering experience.

Operate and support network security infrastructure in a data center environment. Handle incidents, changes, and service requests while providing 24/7 support. Requires 8+ years in network/security engineering with experience in Juniper, Fortinet, and F5.

DevOps Cloud Infrastructure Engineer needed for B2B contract to connect Flix's cloud platform with a new train fleet. Responsibilities include building secure, reliable cloud infrastructure using Terraform/Terragrunt on AWS or other major platforms.

Experienced Workday ERP Consultant needed for freelance engagement. Design, build, and maintain HR solutions using Workday and other HR systems. Support technical and functional implementation, optimizing processes. Requires 3+ years in Workday implementation/consulting.

Experienced Workday Integration Engineer needed for B2B contract. Design, build, and maintain AWS integrations between Workday HRIS and internal/external systems using Python, Terraform, and AWS services.

Lead a large Technical Accounting team, focusing on performance, collaboration, and stakeholder partnership. Responsibilities include supervising operations, managing projects, coaching, and driving continuous improvement. Requires experience leading complex teams.

Senior Software Engineer Fraud to design and implement real-time fraud decisioning services in Python or Kotlin. This role extends the Fraud Decisioning System to new markets and integrates risk vendors. Requires 5+ years building backend systems at scale.

Senior Fullstack Mobile Engineer KMP role building digital financial products. Develop shared logic via KMP, design backend services with Java/Spring Boot, and enhance customer-facing mobile features. Requires strong Kotlin/KMP and mobile architecture skills.

Senior Software Engineer to build and implement real-time fraud decisioning services and APIs in Python or Kotlin. This role extends the Fraud Decisioning System to new international markets.

Experienced DevOps Engineer needed for project-based collaboration. Responsibilities include designing, automating, and maintaining AWS and Kubernetes cloud infrastructure, supporting IaC with Terraform, and improving CI/CD processes.

Senior Data Engineer needed to build big data products using Azure Databricks for global clients. Responsibilities include designing scalable data solutions, managing the data lifecycle, and developing data pipelines. Requires 4+ years in Azure and 6+ years in large-scale data management.

Lead Staff Software Engineer for EU cards, responsible for backend architecture across transaction and ledger systems. Requires 8+ years of experience with Python, Kotlin, AWS, and scaling backend systems.