CrawlJobs Logo

Senior Software Engineer, Transaction Risk

airwallex.com Logo

Airwallex

Location Icon

Location:
Singapore , Singapore

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:

Our mission is to keep Airwallex’s products and services safe and secure. We continuously improve risk strategies and systems using modern technologies, including graph, machine learning, and LLMs/Gen AI, to detect and prevent fraud and abuse at scale.

Job Responsibility:

  • Design, develop, and operate core transaction risk services and infrastructure using Kotlin/Java, supporting payment products and transaction systems
  • Own end-to-end delivery of key components and services on Airwallex’s microservice framework: design, implementation, testing, deployment, and observability
  • Build high-concurrency, highly available distributed services, optimizing latency, throughput, and reliability for production workloads
  • Collaborate with senior engineers and cross-functional partners to define technical solutions, APIs, and service boundaries
  • drive architectural improvements
  • Explore and evaluate new technologies (e.g., graph/streaming/ML/LLM related) and propose pragmatic upgrades aligned with business risk needs
  • Mentor engineers through code reviews, design discussions, and engineering best practices, improving team quality and delivery efficiency
  • Participate in on-call/incident response when needed, driving root-cause analysis and long-term remediation

Requirements:

  • 5+ years experience in Java/Kotlin backend development, with proven delivery in internet-scale applications, large financial systems, or e-commerce platforms
  • 3+ years experience building systems for risk platforms and/or payment platforms
  • Bachelor’s degree in Computer Science or related fields (or equivalent practical experience)
  • Strong knowledge of Java ecosystem, including concurrency/multithreading, high-throughput IO (NIO), and network communication fundamentals
  • Solid foundation in distributed systems design: high concurrency, high load, high availability, resilience, and scalability
  • Strong engineering practices: performance tuning, service stability, data/query optimization, and production troubleshooting
  • Experience with Spring / Spring Boot and designing RESTful APIs
  • Familiarity with build tools such as Gradle/Maven
  • Familiarity with common data formats such as JSON

Nice to have:

  • Strong domain knowledge in risk management, fraud detection, and fintech payment risk strategies
  • Experience with graph databases and graph-based pattern/anomaly detection
  • Experience applying machine learning for predictive risk analytics (model integration, feature engineering collaboration, etc.)
  • Experience with real-time streaming and event-driven architectures (e.g., Kafka, Flink) for low-latency detection and response
  • Experience with large-scale analytics and storage technologies (e.g., ClickHouse, Spark, NoSQL) for risk analysis and investigations
  • Incident response experience, including mitigation planning and post-incident improvement
  • Strong communication and collaboration skills in a cross-regional, cross-functional environment
  • Familiarity with LLM evaluation and safety practices (offline/online evals, red teaming, prompt injection defenses, PII handling, and guardrails) for enterprise use cases

Additional Information:

Job Posted:
February 21, 2026

Employment Type:
Fulltime
Work Type:
On-site work
Icon
Airwallex - 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, Transaction Risk

Senior Software Engineer

We seek an experienced, collaborative, and resourceful Senior Backend Engineer t...
Location
Location
United States , Mountain View
Salary
Salary:
207000.00 - 253000.00 USD / Year
earnin.com Logo
EarnIn
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 4+ years of software engineering experience, with a track record of delivering scalable backend solutions
  • Bachelor's, Master’s, or PhD degree in computer science, computer engineering, or a related technical discipline, or equivalent industry experience
  • Experience working in microservices architectures, designing and building distributed systems
  • Proficiency in at least one modern backend programming language, with the ability to adapt to multiple technologies (we work with Java, Kotlin, C#, and Python)
  • Experience in fintech or building 0-to-1 products, focusing on system scalability and flexibility
  • Experience designing architectures that enable rapid iteration, either from early-stage product development or within Research & Development teams
  • Hands-on experience with continuous integration and deployment tools, ensuring seamless and efficient development workflows
  • Experience in functional and integration testing, ensuring backend services maintain high reliability
  • Excellent written and verbal communication skills, with the ability to collaborate effectively across teams
Job Responsibility
Job Responsibility
  • Design and implement new features, breaking down complex problems into elegant, scalable, and maintainable solutions
  • Architect and maintain robust microservices integrations, leveraging REST/gRPC APIs and event-driven messaging patterns (events/queues) to build flexible and extensible systems
  • Collaborate with Product teams to define technical solutions in ambiguous environments, ensuring that backend architectures support rapid product iteration and expansion
  • Ensure scalability and performance by developing services designed to handle high-throughput and real-time transaction processing
  • Proactively identify and mitigate risks, ensuring our backend systems remain secure, reliable, and resilient
  • Mentor and guide engineers, providing technical leadership through design reviews, code reviews, and architectural guidance
  • Develop test automation to enable continuous integration and deployment, maintaining high development velocity
  • Debug and troubleshoot production issues, working across multiple stack levels to maintain service stability
  • Work closely with cross-functional teams, including data science, product, analytics, and marketing, to ensure backend services align with business objectives
What we offer
What we offer
  • equity and benefits
  • Fulltime
Read More
Arrow Right

Senior QA Engineer

Andersen is hiring a QA Engineer in India to work on large-scale internal projec...
Location
Location
India , Bangalore
Salary
Salary:
Not provided
andersenlab.com Logo
Andersen
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Experience as a QA Engineer for 5+ years, including 2+ years in a Senior/Lead role
  • Strong experience in testing Web, Mobile (iOS/Android), and API, including REST (Postman, automated collections), gRPC, WebSocket, and GraphQL
  • Solid understanding of client–server architecture, microservices, and system interactions, with the ability to conduct architectural risk analysis
  • Strong database expertise: writing complex SQL queries (window functions, optimization), understanding transactions and locks, and experience working with NoSQL (Redis, MongoDB)
  • Proven experience building QA processes from scratch, managing a QA team (2–3 people), conducting technical interviews, and maintaining technical documentation
  • Strong analytical mindset with the ability to present testing results, analyze quality metrics (defect rate, test coverage), and drive improvements through new tools and practices
  • ISTQB Advanced Level (or readiness to obtain it within 3 months) and experience working in Agile/Scrum with a strong understanding of CI/CD principles
  • Level of English – Upper-Intermediate and above
Job Responsibility
Job Responsibility
  • Testing web applications, mobile apps (iOS/Android), and APIs to ensure product quality
  • Conducting architectural risk analysis based on client–server logic, microservices, and system interactions
  • Testing REST APIs using Postman and maintaining automated request collections
  • Testing gRPC, WebSocket, and GraphQL interfaces
  • Writing complex SQL queries, analyzing data correctness, and validating transaction behavior
  • Working with NoSQL databases (Redis, MongoDB) to verify data consistency and caching logic
  • Building QA processes from scratch and defining testing standards for the team
  • Presenting testing results to stakeholders and maintaining clear technical documentation
  • Analyzing quality metrics (defect rate, test coverage) and initiating improvements in testing tools and processes
  • Collaborating within Agile/Scrum teams and contributing to CI/CD quality practices
What we offer
What we offer
  • Mentoring and adaptation systems for each new employee
  • Transparent performance review and assessment systems
  • Access to the best educational platforms, seminars, and practices
  • Benefit package and an extensive set of bonuses
  • Opportunities for growth as a specialist or a manager
Read More
Arrow Right

Senior Software Engineer (Customer Data / API Engineering)

Senior Software Engineer (Customer Data / API Engineering) (Western Union, LLC, ...
Location
Location
United States , New York
Salary
Salary:
189592.00 - 243846.25 USD / Year
nytimes.com Logo
The New York Times
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor’s degree or U.S. equivalent in Computer Science, Applied Computer Science, or a related field, plus 7 years of professional experience as a Software Engineer, Software Developer, or any occupation, job title, position utilizing REST, SOAP, gRPC, WebSockets, and GraphQL for situations demanding high performance, real-time communication, or flexible data retrieval
  • In lieu of a Bachelor's degree plus 7 years of experience, the employer will accept a Master's degree or U.S. equivalent in Computer Science, Applied Computer Science, or a related field, plus 5 years of professional experience as a Software Engineer, Software Developer, or any occupation, job title, position utilizing REST, SOAP, gRPC, WebSockets, and GraphQL for situations demanding high performance, real-time communication, or flexible data retrieval
  • Must also have experience in the following: 5 years of professional experience utilizing AWS Aurora RDS and PostgreSQL and Replication tools including HVR and Q
  • 5 years of professional experience performing encryption including TDE (Transparent Data Encryption) for DB and RSA and SafeNet for ALE for sensitive encryption
  • 5 years of professional experience working with Compliance and Transaction Databases and applications (including DB2 and PostgreSQL)
  • 5 years of professional experience conducting gap analysis, risk analysis, impact analysis, and SWAG analysis for new projects
  • 5 years of professional experience utilizing tools for Amazon Web Services including Amazon Kendra, AWS Proton, Amazon Q and AWS Cloud9
  • 5 years of professional experience implementing data security measures including encryption, access control, and auditing
  • and 5 years of professional experience implementing server-side logic and functionality using Java, Python, frameworks (including Spring Boot, Helidan, Micronaut, and Quarkus), in-memory databases (including Redis, Hazelcast, and BuntDB), and service discovery and mesh (including Consul Connect and Istio)
Job Responsibility
Job Responsibility
  • Perform the delivery of technical systems or sub-systems under aggressive timelines, leveraging global delivery model for project execution
  • Provide administration, optimization, support, maintenance, enhancement & Security of Compliance and transaction services / processes
  • Perform end to end application running active-active/passive mode from on-premise to cloud without any downtime
  • Gather and analyze requirements for new projects and work requests and perform gap, risk, impact and SWAG analysis
  • Develop POCs for technological advancements or technological migration and its implementation like on-prem to AWS cloud or assessment of applications and solutions
  • Analyze, design, develop, build and test complex and/or high priority solutions
  • Prepare technical design documents, test plans, test cases, Architecture diagrams and data dictionary
  • Review technical work product and test results to ensure zero defect deliveries
  • Collaborate with vendors and other supporting teams for end-to-end solutioning of enterprise initiatives and performance issues
  • Launch customer centric DB and applications in new countries and new platforms in controlled way
  • Fulltime
Read More
Arrow Right

Staff Backend Engineer

As a staff software engineer, you are a senior individual contributor responsibl...
Location
Location
Singapore , Singapore
Salary
Salary:
Not provided
airwallex.com Logo
Airwallex
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 8+ years of professional software engineering experience, with sustained impact as a senior or staff-level individual contributor
  • Bachelor’s degree in Computer Science, Software Engineering, or a related field
  • Strong proficiency in backend development using languages such as Java, Kotlin, Go, or Python
  • Deep experience designing and delivering large-scale, distributed systems in production
  • Strong computer science fundamentals and solid understanding of object-oriented design
  • Hands-on experience with event-driven and streaming architectures, for example Kafka
  • Proven experience designing and operating RESTful APIs at scale
  • Experience with domain-driven design and event-driven architectures
  • Cloud experience with GCP (preferred) or AWS, including Docker and Kubernetes
  • Familiarity with observability tooling such as Splunk, Grafana, and Prometheus
Job Responsibility
Job Responsibility
  • Design, build, and operate highly reliable, scalable systems that powers real-time card transactions
  • Take end-to-end ownership of complex problem spaces, from system design through production rollout and long-term evolution
  • Lead the design of distributed, event-driven systems with strong guarantees around correctness, performance, and resiliency
  • Drive architectural improvements that reduce complexity, improve operability, and enable future product growth
  • Set a high bar for code quality, testing, observability, and operational readiness
  • Identify and remove technical bottlenecks that slow down teams or introduce systemic risk
  • Influence technical direction across multiple teams through design reviews, RFCs, and hands-on collaboration
  • Mentor senior engineers and help shape engineering best practices without formal people management responsibilities
  • Contribute to the evolution of core infrastructure and shared platform capabilities to improve developer productivity and system reliability
  • Evaluate new technologies pragmatically and guide their adoption where they deliver clear value
  • Fulltime
Read More
Arrow Right

Senior Backend Software Engineer - Core Domain

You will be joining the Core Team focused on critical systems. This includes man...
Location
Location
Italy , Milan
Salary
Salary:
Not provided
satispay.com Logo
Satispay
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • At least 5 years of related experience in back-end software engineering
  • Proven track record of working with microservices and cloud environments (AWS is a plus) in high-paced, mission-critical contexts
  • Deep experience with Java and Spring Boot
  • Strong understanding of distributed systems and how to manage external dependencies (like banking protocols) effectively
  • Able to communicate complex technical concepts clearly and convincingly
  • Excel at coordinating implementations with other teams and building trust with various stakeholders
  • Focused on delivering software that meets evolving user needs
  • Adaptable, avoid analysis paralysis, and go the extra mile to optimize systems beyond the initial requirements
  • Passionate about FinTech
  • Fluent in English
Job Responsibility
Job Responsibility
  • Engineer core platform domains such as the Transaction Ledger, Identity & Access Management (IAM), or Payment Orchestration
  • Ensure these engines remain high-performant, scalable, and functional for product teams to integrate with
  • Scale risk & financial engines
  • Optimize and implement services dedicated to bank integrations, credit risk, and real-time fraud detection
  • Build the robust logic that protects our source of truth and secures Satispay’s financial ecosystem
  • Drive technical analysis for projects that span across multiple services
  • Lead technical discussions and produce high-quality documentation (Smart Papers)
  • Ensure technical quality by implementing rigorous testing strategies and overseeing safe rollouts
  • Proactively identify and resolve technical blockers, promoting a culture of simplicity and maintainability in the codebase
  • Provide technical guidance to junior and mid-level engineers, fostering a culture of operational excellence
What we offer
What we offer
  • Unlimited paid time off
  • Psychological support & mental health webinars with Serenis
  • Flexible hybrid working system
  • Extended parental leave
  • Childcare leave
  • Professional development programmes
  • Internal mobility program
  • Language classes with Preply
  • Internal workshops & training
  • Stock Option Plan (with additional grants often provided based on performance)
  • Fulltime
Read More
Arrow Right

Senior Data Engineer

We are looking for a Senior Data Engineer to contribute to high-impact initiativ...
Location
Location
India , Hyderabad
Salary
Salary:
Not provided
uber.com Logo
Uber
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 7+ years of hands-on experience in software engineering with a focus on data engineering
  • Proficiency in at least one programming language such as Python, Java, or Scala
  • Strong SQL skills and experience with large-scale data processing frameworks (e.g., Apache Spark, Flink, MapReduce, Presto)
  • Demonstrated experience designing, implementing, and operating scalable ETL pipelines and data platforms
  • Proven ability to work collaboratively across teams and communicate technical concepts to diverse stakeholders
Job Responsibility
Job Responsibility
  • Design, build, and optimize data systems that support the scalability, accuracy, and compliance of our global payments infrastructure
  • Work closely with cross-functional partners in Engineering, Product, Risk, and Compliance to transform complex financial and transactional data into reliable pipelines, actionable insights, and audit-ready datasets
Read More
Arrow Right

Senior Software Engineer

Be part of the Decision Management Program, which creates services for multiple ...
Location
Location
India , Pune
Salary
Salary:
Not provided
mastercard.com Logo
Mastercard
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Application architecture
  • High performance and highly scalable transaction processing systems
  • Passionate about solving complex performance and availability problems
  • A wide breadth and depth of technical experience including Java, Linux, and Oracle
  • Performance tools such as LoadRunner, JMeter, Gatling, Dynatrace, software profilers, Splunk, etc.
  • Capacity modeling/planning processes and tools
  • Strong verbal and written communication skills with the ability to communicate to an audience at all levels within an organization
  • Bachelor’s Degree in Computer Science, Engineering, or related technical field
Job Responsibility
Job Responsibility
  • Be part of the Decision Management Program, which creates services for multiple business solutions to combat fraud and validate cardholder identity in real-time
  • Responsible for the performance and availability engineering for the platform
  • Help build an engineering practice that empathizes doing performance engineering work earlier in the delivery lifecycle
  • Partner with solution architects, software engineers, and other team roles to assess the platform’s needs, help design new capabilities, design and run tests, help troubleshoot problems, identify risks, and make recommendations
  • Ensure potential performance and availability challenges are proactively identified, recommendations implemented, and that the systems’ capacity and availability exceed requirements while ensuring the platform achieves business results
  • Fulltime
Read More
Arrow Right

Software Engineering Intern

Our 10-week summer internship program will be held in-person at our Atlanta head...
Location
Location
United States , Atlanta
Salary
Salary:
Not provided
allianceautomotive.co.uk Logo
Alliance Automotive UK LV Ltd
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Rising juniors and seniors (as of summer 2026) enrolled in an undergraduate program with a focus on computer science, software development, or related technology fields
  • Experience in application development, distributed systems, machine learning, natural language processing, or AI
  • Demonstrated passion for learning and applying modern technology tools to create innovative solutions
  • Preference will be given to applicants with a GPA of at least 3.6 as well as to those attending universities with highly rated Technology programs
Job Responsibility
Job Responsibility
  • Help solve complex business problems by leveraging technology and building scalable software platforms
  • Design and build large-scale software solutions using modern technologies to drive business value
  • Develop AI-driven solutions to solve business challenges by performing data preprocessing, model development, and automation to enhance processes
  • Collaborate with cross-functional teams to integrate AI tools and optimize results
  • Working across teams, review payment transaction data to determine fraud and abuse models
  • Form relationships with business partners, banking partners, and internal stakeholders to understand requirements and obtain data sources
  • Utilize AI and data-science to create tooling to flag at-risk transactions
  • Utilize transaction registers from POS, banks, and internal systems to facilitate a technology driven reconciliation process
  • Identify trends and anomalies to create alerts and reports
  • Generate dashboards for data and analysis
What we offer
What we offer
  • Gain valuable experience and advance your technical skills
  • Network with highly respected Technology leaders
  • Highly collaborative work environment
  • Fun company-sponsored events, like attending a Braves game
  • Explore GPC’s rich history through field trips to various locations, including distribution centers and retail operations
  • Earn bragging rights, prizes, and opportunities to showcase your tech skills
  • Fulltime
Read More
Arrow Right
Remote jobs 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 Salaries About Us Contact
Follow Us
Facebook
X (Twitter)
LinkedIn
Instagram
CrawlJobs Group
ITFlashcards AllDevBlogs
© 2026 CrawlJobs Ltd. All Rights Reserved
Terms & Conditions Privacy Policy