Senior Backend Developer

Sorry, this job was removed at 07:30 p.m. (CST) on Monday, Jun 23, 2025
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Warsaw, Warszawa, Mazowieckie
In-Office
Business Intelligence • Consulting
The Role
K2 Integrity seeks a highly motivated Backend Developer to join our Financial Crimes Risk Management practice. This is a contract role. You will play a pivotal role in combatting financial crime by leveraging advanced server coding techniques. Your expertise in Python and PySpark will be instrumental in developing innovative solutions to detect and prevent illicit activities across various financial crime typologies. This is an opportunity to utilize your analytical acumen and passion for development to safeguard the integrity of the financial system. 
Responsibilities:
  • Develop and maintain robust and efficient server-side code for our platforms.
  • Design, implement, and manage database systems to ensure optimal performance and data integrity.
  • Build and maintain APIs to support front-end functionality and third-party integrations.
  • Optimize applications for maximum speed and scalability, ensuring high performance under increased loads.
  • Implement security and data protection solutions to safeguard sensitive information.
  • Identify, diagnose, and resolve technical issues in a timely and effective manner.
  • Ensure high standards of code quality, organization, and documentation.
  • Collaborate with cross-functional teams to translate requirements into technical solutions.
  • Optimize applications for maximum speed and scalability.
  • Implement security and data protection measures.
  • Ensure the technical feasibility of UI/UX designs.
  • Stay updated with industry trends and incorporate best practices into our systems.

Qualifications:
  • Bachelor’s or Master’s degree in computer science, engineering, or related field.
  • 8+ years of experience in backend development in a fast-paced environment.
  • Multiple years of team management experience.
  • Demonstrated programming skills with SAS, Spark, Python, PySpark, R, Node.js or equivalent languages.
  • Demonstrated experience working with Anti-Financial Crime and Compliance technologies. For example: Transaction Monitoring Systems, KYC/CDD, Sanctions and Wire screening Applications, Network Analysis, Entity Resolution & Identification and Segmentation utilities or Case Management solutions.
  • Strong working knowledge and familiarity with Palantir Foundry applications, products, and solutions.
  • Experience with database technologies and web service technologies.
  • Experience with API design, development and data consumption.
  • Knowledge of cloud services (AWS, Azure, GCP) and containerization technologies (Docker, Kubernetes).
  • Strong understanding of code versioning tools, such as Git.
  • Server-side development experience.
  • Open-source or community contributions.
  • Knowledge of JIRA, Azure DevOps and other product management tools.
  • Understanding of RESTful API design principles.
  • Knowledge of security best practices for web and mobile applications.
  • Excellent problem-solving skills and attention to detail.
  • Ability to work effectively in a collaborative team environment.

This role will be work from home (Poland).

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The Company
HQ: New York, NY
276 Employees
Year Founded: 2009

What We Do

K2 Integrity is the preeminent risk, compliance, investigations, and monitoring firm—built by industry leaders, driven by interdisciplinary teams, and supported by cutting-edge technology to safeguard our clients’ operations, reputations, and economic security. K2 Integrity represents the merger of K2 Intelligence, an industry-leading investigative, compliance, and cyber defense services firm founded in 2009 by Jeremy M. Kroll and Jules B. Kroll, the originator of the modern corporate investigations industry, and Financial Integrity Network (FIN), a premier strategic advisory firm founded by Juan Zarate and Chip Poncy dedicated to helping clients achieve their financial integrity goals.

K2 Integrity leverages unmatched multidisciplinary experience to develop cutting-edge solutions, stimulate business opportunities, and shape global economic security in a complex world. Whether it’s protecting clients’ assets or navigating the complex financial regulatory landscape to help clients identify, manage, and mitigate risk, K2 Integrity is an advisor trusted to meet and exceed clients’ goals in a rapidly changing world. To learn more about how K2 Integrity is revolutionizing the management of risk, visit our website, www.k2integrity.com.

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