CrawlJobs Logo

Senior Software Engineer - C# OR Java

mastercard.com Logo

Mastercard

Location Icon

Location:
Poland , Gdansk

Category Icon
Category:
IT - Software Development

Job Type Icon

Contract Type:
Not provided

Salary Icon

Salary:

Not provided
Save Job
Save Icon
Apply Position

Job Description:

We’re looking for a Senior Software Engineer to join our Connectivity division - the team that ensures our platform integrates flawlessly with thousands of bank and financial institutions APIs. You’ll tackle reliability at scale, low latency, and regulatory complexity, working in a flat, collaborative team where engineers own features end‑to‑end.

Job Responsibility:

  • Design, develop, and maintain APIs and integration modules connecting our platform to thousands of European banks and financial institutions
  • Collaborate with engineers and product stakeholders to define requirements, set acceptance criteria, and deliver solutions
  • Contribute to architecture by ensuring scalability, maintainability, and adherence to best practices
  • Maintain quality through code reviews, testing, and continuous improvement initiatives
  • Solve complex problems involving performance, distributed systems, and regulatory constraints

Requirements:

  • Strong experience building backend services (preferably in .NET and Java)
  • Experience working in fast-paced, product-centric environments
  • Solid understanding of API design, distributed systems, cloud environments
  • Experience in establishing bank connections through PSD2 interfaces
  • Ability to write clean, maintainable, and testable code
  • Collaborative mindset and eagerness to work closely with product and engineering peers
  • Curiosity and drive to continuously improve systems, processes, and yourself
What we offer:
  • Impact at scale
  • Small team, big responsibility
  • Cutting-edge fintech

Additional Information:

Job Posted:
February 01, 2026

Employment Type:
Fulltime
Icon
Mastercard - All Job Offers
Job Link Share:
Copy Link Icon
Facebook Icon Twitter Icon LinkedIn Icon

Looking for more opportunities? Search for other job offers that match your skills and interests.

Briefcase Icon

Similar Jobs for Senior Software Engineer - C# OR Java

Senior Software Engineer

Citi ICG Technology organization is looking for a senior software engineer in th...
Location
Location
Hong Kong , Kowloon
Salary
Salary:
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Minimum 7 years’ experience with Strong technical knowledge with expertise in either Java, C#, C++
  • Previous experience in developing automated trading platforms
  • Strong understanding of automated testing techniques
  • Solid understanding of Agile methodologies and Continuous Integration processes
  • Ability to prioritize multiple tasks, set goals and meet deadlines
  • Strong communication skills with a demonstrable ability to present & grasp complex concepts in a multicultural environment is required
  • Bachelor’s degree/University degree or equivalent experience
Job Responsibility
Job Responsibility
  • Design, develop and support of the high-performance electronic execution platform
  • Build common solutions for trading platform monitoring, trade reconciliation, application recovery etc.
  • Partner with traders, quant researchers and clients on product development
  • Continuous maintenance & improvements of the testing frameworks, development tools and environments
  • Ability to envision, design and implement test cases for trading functions
  • Contribute towards Agile and Continuous Integration processes
  • Fulltime
Read More
Arrow Right

Equities Electronic Trading - Senior Software Engineer

Citi’s Operations and Technology (O&T) enables Citi to achieve its day-to-day op...
Location
Location
Hong Kong , Kowloon
Salary
Salary:
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Minimum 7 years’ experience with Strong technical knowledge with expertise in either Java, C#, C++
  • Previous experience in developing automated trading platforms
  • Knowledge of Python would be beneficial
  • Strong understanding of automated testing techniques
  • Solid understanding of Agile methodologies and Continuous Integration processes
  • Ability to prioritize multiple tasks, set goals and meet deadlines
  • Strong communication skills with a demonstrable ability to present & grasp complex concepts in a multicultural environment is required
  • Bachelor’s degree/University degree or equivalent experience
Job Responsibility
Job Responsibility
  • Design, develop and support of the high-performance electronic execution platform
  • Build common solutions for trading platform monitoring, trade reconciliation, application recovery etc.
  • Partner with traders, quant researchers and clients on product development
  • Continuous maintenance & improvements of the testing frameworks, development tools and environments
  • Ability to envision, design and implement test cases for trading functions
  • Contribute towards Agile and Continuous Integration processes
What we offer
What we offer
  • Programs and services for physical and mental well-being including access to telehealth options, health advocates, confidential counseling
  • Expanded Paid Parental Leave Policy
  • Access to learning and development resources
  • Generous paid time off packages
  • Resources and tools to volunteer in the communities
  • Fulltime
Read More
Arrow Right

Senior Backend Software Engineer

Atlassian is looking for Engineers to join one of our Sydney engineering teams (...
Location
Location
Australia , Sydney
Salary
Salary:
Not provided
https://www.atlassian.com Logo
Atlassian
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Expert-level experience with one or more prominent languages such as Java, Python, C#, C/C++, or Ruby
  • Highly-trusted knowledge in at least one domain and working knowledge in multiple tech domains
  • Passion for collaborating with and mentoring junior members of the team
  • Considers the customer impact when making technical decisions
  • A real appetite for learning and growing, both as an individual and teammate
Job Responsibility
Job Responsibility
  • Drive large, complex projects autonomously, from technical design to launch
  • Determine plans-of-attack on large projects
  • Tackle complex architecture challenges, apply architectural standards and start using them on new projects
  • Lead code reviews & documentation as well as take on complex bug fixes, especially on high-risk problems
  • Be an example for thorough, meaningful code reviews
  • Partner across engineering teams to tackle company-wide initiatives spanning multiple projects
  • Transfer your depth of knowledge from your current language to excel as a Java developer
  • Mentor more junior members
What we offer
What we offer
  • Health coverage
  • Paid volunteer days
  • Wellness resources
  • Fulltime
Read More
Arrow Right

Senior Software Engineer – Core

We’re looking for a skilled and passionate Software Engineer to join our team an...
Location
Location
Israel , Tel Aviv
Salary
Salary:
Not provided
https://www.hpe.com/ Logo
Hewlett Packard Enterprise
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 5+ years of hands-on software development experience
  • Proficiency in Go, C#, or Java
  • Experience with relational databases (e.g., PostgreSQL)
  • Strong knowledge of microservices, Docker, and Kubernetes
  • Experience building and deploying cloud-native applications
  • Problem-solving mindset with a focus on clean, scalable design
Job Responsibility
Job Responsibility
  • Design and build scalable, cloud-native applications
  • Write clean, maintainable, and testable code
  • Solve challenges in performance, reliability, and fault tolerance
  • Collaborate with cross-functional teams across product, DevOps, and QA
What we offer
What we offer
  • Health & Wellbeing
  • Personal & Professional Development
  • Unconditional Inclusion
  • Fulltime
Read More
Arrow Right

Senior Software Engineer – Core

We’re looking for a skilled and passionate Software Engineer to join our team an...
Location
Location
Israel , Tel Aviv
Salary
Salary:
Not provided
https://www.hpe.com/ Logo
Hewlett Packard Enterprise
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 5+ years of hands-on software development experience
  • Proficiency in Go, C#, or Java
  • Experience with relational databases (e.g., PostgreSQL)
  • Strong knowledge of microservices, Docker, and Kubernetes
  • Experience building and deploying cloud-native applications
  • Problem-solving mindset with a focus on clean, scalable design
Job Responsibility
Job Responsibility
  • Design and build scalable, cloud-native applications
  • Write clean, maintainable, and testable code
  • Solve challenges in performance, reliability, and fault tolerance
  • Collaborate with cross-functional teams across product, DevOps, and QA
What we offer
What we offer
  • Health & Wellbeing
  • Personal & Professional Development
  • Unconditional Inclusion
  • Fulltime
Read More
Arrow Right

Senior Software Engineer – Core

We’re looking for a skilled and passionate Software Engineer to join our team an...
Location
Location
Israel , Tel Aviv
Salary
Salary:
Not provided
https://www.hpe.com/ Logo
Hewlett Packard Enterprise
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 5+ years of hands-on software development experience
  • Proficiency in Go, C#, or Java
  • Experience with relational databases (e.g., PostgreSQL)
  • Strong knowledge of microservices, Docker, and Kubernetes
  • Experience building and deploying cloud-native applications
  • Problem-solving mindset with a focus on clean, scalable design
Job Responsibility
Job Responsibility
  • Design and build scalable, cloud-native applications
  • Write clean, maintainable, and testable code
  • Solve challenges in performance, reliability, and fault tolerance
  • Collaborate with cross-functional teams across product, DevOps, and QA
What we offer
What we offer
  • Health & Wellbeing
  • Personal & Professional Development
  • Unconditional Inclusion
  • Fulltime
Read More
Arrow Right

Senior Software Engineer – Security

We’re looking for a Senior Software Engineer with deep experience in cloud secur...
Location
Location
Israel , Tel Aviv
Salary
Salary:
Not provided
https://www.hpe.com/ Logo
Hewlett Packard Enterprise
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 5+ years of software development experience
  • Proficiency in Go, C#, or Java
  • Strong background in security domains: DLP (Data Loss Prevention), Threat Intelligence, CASB (Cloud Access Security Broker), SWG (Secure Web Gateway)
  • Understanding of secure protocols and remote access flows (TLS, HTTPS, RDP, SSH)
  • Strong knowledge of microservices, Docker, and Kubernetes
Job Responsibility
Job Responsibility
  • Build cloud-native services for real-time security enforcement
  • Develop capabilities for DLP, threat detection, and policy enforcement
  • Contribute to CASB and SWG features for securing SaaS and internet access
  • Integrate threat intelligence mechanisms into platform services
What we offer
What we offer
  • Health & Wellbeing
  • Personal & Professional Development
  • Unconditional Inclusion
  • Fulltime
Read More
Arrow Right

Senior Software Engineer

As a Full Stack Engineer, you will work alongside a team of engineers on the acc...
Location
Location
Italy , Milan
Salary
Salary:
Not provided
accesso.com Logo
accesso
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 5+ years of relevant work experience
  • Experience in Java or similar OO language (like C#)
  • Experience with JSP technologies
  • Experience with relational databases (Microsoft SQL), including writing complex SQL queries
  • Experience with cloud computing methodologies like high availability, scalability, fault-tolerance and resiliency
  • Familiarity with XML and JSON
  • Experience writing unit tests for Java applications
  • Ability to work in teams or independently with minimal direction
  • Experience with Scrum practices and ceremonies
Job Responsibility
Job Responsibility
  • Maintaining existing software code to meet the same standards/criteria as new code
  • Documenting newly implemented features and bug fixes
  • Assisting with and/or performing upgrades, training, and implementation
  • Alpha testing new code
  • Ownership of the full lifecycle of services, including deployment and operation in production
  • Collaborating with other engineering teams
What we offer
What we offer
  • Flexible hybrid schedule
  • Work-life balance with flexibility in choosing work setting and hours
  • Virtual team connection activities
  • Inclusive and diverse work environment
  • Equal opportunities
  • Fulltime
Read More
Arrow Right
Jobs by Category
Art and Entertainment Jobs Banking Jobs Call Center Jobs Construction Jobs Consulting Jobs Customer Service Jobs Education Jobs Energy Jobs Finance Jobs Gastronomy Jobs Health and Beauty Jobs Hospitality and Tourism Jobs Human Resources Jobs Insurance Jobs IT - Administration Jobs IT - Software Development Jobs Legal Jobs Logistics Jobs Manufacturing Jobs Marketing, Digital Marketing, SEO, SEM Jobs Media Jobs Nursing Jobs Office Administration Jobs Pharmacy Jobs Physical Work Jobs Public Relations Jobs Public Sector Jobs Purchasing Jobs Quality Control Jobs Real Estate Jobs Research and Development Jobs Sales Jobs
Job Positions Jobs by Country
United States Jobs United Kingdom Jobs India Jobs Canada Jobs Australia Jobs Germany Jobs Ireland Jobs Poland Jobs
Company
Blog About Us Contact
Follow Us
Facebook
X (Twitter)
LinkedIn
Instagram
CrawlJobs Group
ITFlashcards AllDevBlogs
© 2026 CrawlJobs Ltd. All Rights Reserved
Terms & Conditions Privacy Policy