Senior SW Engineer

Senior SW Engineer

Java

Chmielna 73, Warszawa

VISA

Full-time
Permanent
Mid
Hybrid

Tech stack

    English

    C1

    REST

    regular

    JSON

    regular

    REST API

    regular

    Java

    regular

    NoSQL

    regular

    Spring

    regular

    React

    junior

    JavaScript

    junior

Job description

As a Senior Software Engineer, you will be part of our Acceptance Risk Solutions team to help design, enhance and build our transactional fraud detection solutions in an agile development environment. You will work with colleagues, who will support and challenge you daily. You are a full stack developer enjoying building real-time transactional services that are highly functional, distributed, secure, scalable and resilient. You are curious about GenAI and how it can be applied to fraud detection. We believe in self-managing Agile teams who build products end to end focusing on unit testing, code reviews and continuous integration for excellent code quality. You will see the code written and moved to production within just a few days, to then be used by a huge customer base. You will be driving innovation that makes our products stand apart from our competitors, delight the customer with faster times for market delivery.


Essential Functions:

  • You’ll help our customers achieve their real goals by understanding their requirements and how they respond to their business needs.

  • You’ll use technologies that include Java, React, REST, NoSQL, Docker and more

  • You’ll venture into the world of GenAI to build fraud management solutions

  • You will work with Technical Product Management to understand business requirements and architect a solution that is robust and scalable along with providing technical documentation of solution

  • You have the work and academic experience that will demonstrate proficiency and ease with programming languages, code quality initiatives, scripting languages and operating systems

  • You’ll leverage new technologies to build the next generation of Risk Services

  • You’ll play key role to design and implement various components of our global transaction processing systems

  • You have excellent communication and interpersonal skills and above all, you are a team player


This is a hybrid position. Expectation of days in office will be confirmed by your hiring manager.


Qualifications

  • 3 or more years of work experience or more than 2 years of work experience with an Advanced Degree (e.g. Masters, MBA, JD, MD)

  • You are a Java expert and you have experience with REST APIs, JSON and exposure to container based technologies

  • You'll translate wireframes/mockups into functional HTML/JavaScript prototypes

  • You have full-stack engineer experienced in front-end technologies like JavaScript, HTML5, CSS4, React.js, Redux and Riot.js

  • You have strong experience with Agile development incorporating TDD, Continuous Integration and Continuous Delivery, utilizing technologies such as GIT, Maven, Jenkins, Chef, Sonar, JUnit, Mock frameworks

  • You have experience building enterprise class applications that use industry best practices for reliability, availability, scalability and operability

  • Experience in leading edge areas such as GenAI, Machine Learning and Deep Learning is a plus

  • Exposure to Big Data and analytics in general leveraging technologies like Hadoop, Spark, Cassandra

  • Understand and own component security analysis, including code and data flow review. Collaborate with security team to implement and verify secure coding techniques

  • We count on your curiosity and creativity when working with your partners to create innovative solutions

  • You are a quick learner and have a strong work ethic to focus on our goals

  • You have the passion to work with people and contribute to best practices that help the team to improve in efficiency and quality

  • A background in the fraud detection domain is a plus


Additional Information

Visa is an EEO Employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status. Visa will also consider for employment qualified applicants with criminal histories in a manner consistent with EEOC guidelines and applicable local law.

Published: 13.08.2025
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