.NET Developer (Senior/Lead)

CMC Global is a member of CMC Corporation with an aspiration to bring ICT products, solutions, and services of Vietnam to the international market.
Established in March 2017 as a strategic move of the Corporation to enter the global stage, we are proud to be the leading company in Vietnam in providing a wide variety of comprehensive IT Solutions & Services, ranging from Traditional services to Digital Transformation, as well as Consultancy, to organizations worldwide.
HIRING - .NET BACKEND DEVELOPER & .NET TECH LEAD
Working Location:
District 1, HCMC
Working Model:
Onsite for the first month → Remote from the following months
Project Domain:
Payment / Fintech / Fraud Prevention
Start Date:
07/10
We are looking for experienced .NET engineers to join a new
Payment & Fraud Prevention integration project
, working on checkout, payment authentication and real-time fraud decisioning.
POSITION 1: Senior .NET Backend Developer
Experience: 5+ years in .NET Backend Development
Start Date:
07/10
Responsibilities
Develop backend services and APIs for payment/checkout and fraud prevention flows.
Build pre-authorization API integrations with third-party fraud/risk platforms.
Implement fraud decision flows including
Approve / Decline / Not Reviewed
and post-authorization callbacks.
Integrate and work with payment security/tokenization solutions and
3D Secure (3DS)
authentication flows.
Handle API integration patterns including
retry, idempotency, error handling and graceful degradation
.
Collaborate closely with React Native/mobile teams to support device fingerprinting and payment flows.
Participate in technical spikes to resolve architecture and integration-related questions before implementation.
Research existing/legacy code and contribute to technical documentation when required.
Must-have
Strong experience in
.NET Backend Development
.
Solid backend experience with
Payment / Checkout / Transaction systems
.
Understanding of order flow and transaction state handling.
Experience integrating third-party APIs, especially payment, fraud, risk or financial platforms.
Good understanding of
API integration, retries, idempotency and fault tolerance
.
Able to work with incomplete/evolving requirements and proactively clarify technical requirements.
Good English communication skills.
Nice-to-have
Experience with
Fraud Prevention / Risk Management
platforms.
Experience with
3DS / payment authentication
.
Experience with
React Native
, iOS/Android native modules or mobile integration.
Experience in
Fintech / E-commerce / Payment
projects.
Experience working with tokenization or PCI-related payment flows.
POSITION 2: .NET TECH LEAD
Experience: 5-7+ years
Responsibilities
Provide technical leadership for the .NET backend team throughout the project.
Lead the design and implementation of payment, checkout and fraud prevention integrations.
Drive technical discussions and architecture decisions with project/client stakeholders.
Review technical requirements, identify gaps and proactively drive solutions.
Lead technical spikes and resolve open architecture/integration questions.
Define and maintain backend development standards, integration patterns and best practices.
Conduct code reviews and provide technical guidance to developers.
Ensure system reliability, scalability, security and maintainability.
Collaborate closely with Product, QA, React Native/mobile and other technical teams.
Support the team in handling complex issues related to payment, transaction processing and third-party integrations.
Must-have
5-7+ years of experience in .NET Backend Development.
Proven experience in
Technical Leadership / Team Leadership
.
Strong backend architecture and system design knowledge.
Strong experience with API integrations and distributed systems.
Experience working with
Payment / Fintech / E-commerce / Transaction systems
is preferred.
Strong problem-solving skills and ability to drive technical decisions.
Comfortable working with evolving requirements and client stakeholders.
Strong English communication skills.
Fraud prevention domain knowledge is
not mandatory
.
Nice-to-have
Experience with payment gateways, fraud/risk platforms or 3DS.
Experience with React Native/mobile integration.
Experience working with international clients or distributed teams.
BENEFITS
Training and career development opportunities.
Compensation package: up to 14 months' salary/year + Project bonus (if any).
Extra package: 16 million VND/employee/year (bonuses for Tet, New Year, Birthday, CMC Corp's Birthday, 2/9, Mid-Autumn, etc.).
Salary review: 2 times/year or based on excellent performance.
Opportunity to work with newest technology trends and develop your career in an international environment, building large-scale & global software products.
Onsite opportunities: short-term and long-term assignments in US, EU, Asia.
Paid annual leave: 12 days/year + birthday gift.
Full benefits under Vietnamese labor law plus CMC Global's benefits (PTI premium healthcare, company trip, holidays, year-end party, etc.).
Exciting leisure activities: football club, family day, happy hour, art/sport events.
Working hours: 8 hours/day (Mon-Fri), flexible time (check-in 8:00-9:00, check-out 17:00-18:00).