About This Job
We are seeking a highly experienced Senior Backend .NET API Developer with strong expertise in financial services platforms to design, build, and optimize secure, scalable backend systems. The ideal candidate will have deep experience in .NET Core / ASP.NET APIs, microservices architecture, and high-volume transactional systems, with a strong understanding of banking/financial domain requirements such as security, compliance, and real-time processing.This role goes beyond development — the candidate is expected to actively participate in production incident (ITN) calls, take ownership of issue resolution, and drive root cause fixes to ensure system stability, uptime, and customer impact mitigation.
Key Responsibilities
Production Support & Incident Management (Critical Responsibility)
- Actively participate in ITN / production incident bridge calls and provide real-time technical troubleshooting
- Take end-to-end ownership of production issues impacting APIs and backend services
- Perform rapid debugging, issue isolation, and hotfix implementation during incidents
- Drive root cause analysis (RCA) and implement permanent fixes to prevent recurrence
- Collaborate with cross-functional teams (QA, DevOps, Infra) to restore service within SLA timelines
- Monitor logs, metrics, and tracing tools to quickly identify production failures
- Ensure post-incident documentation, learnings, and preventive measures are implemented
Backend & API Development
- Design, develop, and maintain RESTful APIs and microservices using .NET Core / ASP.NET Core
- Build scalable backend services supporting high-volume transactions and financial workflows
- Implement robust business logic for payments, accounts, transactions, and integrations
Architecture & System Design
- Lead backend architecture design focusing on scalability, security, and performance
- Define API contracts, service interfaces, and data models
- Design distributed systems, event-driven or microservices architectures
Financial Domain & Compliance
- Ensure systems comply with financial regulations, security standards, and audit requirements
- Implement secure transaction processing and data protection strategies
- Work with domain teams on risk, reporting, settlement, or payment systems
Database & Data Management
- Design and optimize relational and NoSQL databases (SQL Server, PostgreSQL, MongoDB)
- Ensure data integrity, consistency, and performance tuning
Integration & Collaboration
- Integrate with external systems (e.g., payment gateways, banking APIs, third-party services)
- Collaborate with architects, product teams, QA, and DevOps teams
Code Quality & Leadership
- Conduct code reviews, mentoring, and enforce best practices
- Drive technical design discussions and solution architecture
- Participate in Agile/Scrum processes
Performance & Operations
- Optimize systems for low latency, high availability, and reliability
- Troubleshoot production issues and perform root-cause analysis
Required Qualifications
Experience
- 8–12+ years of experience in backend development
- Strong experience in financial services / banking / fintech domain (mandatory)
- Proven experience building enterprise-grade applications and APIs
Technical Skills
- Strong proficiency in C#, .NET Core / .NET 8+ / ASP.NET Core
- Hands-on experience with REST APIs, Web APIs, and microservices
- Solid knowledge of SQL Server and database design
- Experience with Entity Framework / ORM tools
- Understanding of distributed systems, event-driven architecture
Architecture & Cloud
- Experience with cloud platforms (Azure/AWS/GCP)
- Familiarity with Docker, Kubernetes, CI/CD pipelines
- Knowledge of system design and scalability patterns
Security & Compliance
- Strong understanding of:
- API security (OAuth2, JWT, OIDC)
- Data encryption and protection
- Financial compliance standards (PCI, SOX, etc.)
Other Skills
- Strong analytical, problem-solving, and debugging skills
- Excellent communication and stakeholder management
- Experience mentoring and leading engineers
Preferred Qualifications
- Experience with low-latency trading or real-time systems
- Knowledge of payment systems (ACH, RTP, cards, SWIFT, etc.)
- Experience with event streaming (Kafka, RabbitMQ)
- Exposure to Domain-Driven Design (DDD)
Education
- Bachelor’s or Master’s degree in Computer Science, Engineering, or related field
What Success Looks Like
- Delivering secure, scalable APIs powering financial transactions
- Maintaining high system uptime and performance under load
- Driving architecture modernization and microservices adoption
- Enabling compliant and reliable financial integrations
Nice-to-Have (Based on Your Context – Optional Add-on)
If you plan to tailor this for core banking / enterprise services (like your environment at Axos), you can explicitly add:
- Experience with identity platforms, payments systems, or core banking integrations
- Familiarity with event-driven enterprise platforms (Redis, RabbitMQ)
- Exposure to API gateways (Apigee).
About Axos
Born digital-first, Axos delivers financial tools and services that allow individuals, small businesses, and companies to access and manage their money how, when, and where they want. We’re a diverse team of dynamic, insightful, and independent innovators who are excited to provide technology-driven solutions that offer unbeatable value to our customers.
Axos Financial is our holding company and is publicly traded on the New York Stock Exchange under the symbol "AX" (NYSE: AX).
Learn More about working at Axos Business Center
Pre-Employment Background Check, Medical, and Drug Test:
All offers are contingent upon the candidate successfully passing a credit check, criminal background check, and pre-employment medical and drug screening.
Equal Employment Opportunity:
Axos is an Equal Opportunity employer. We are committed to providing equal employment opportunities to all employees and applicants without regard to race, religious creed, color, sex (including pregnancy, breast feeding and related medical conditions), gender, gender identity, gender expression, sexual orientation, national origin, ancestry, citizenship status, military and veteran status, marital status, age, protected medical condition, genetic information, physical disability, mental disability, or any other protected status in accordance with all applicable federal, state, and local laws.
Job Functions and Work Environment:
While performing the duties of this position, the employee is required to sit for extended periods of time. Manual dexterity and coordination are required while operating standard office equipment such as computer keyboard and mouse, calculator, telephone, copiers, etc.
The work environment characteristics described here are representative of those an employee may encounter while performing the essential functions of this position. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions of this position.
Skills Required
- 8-12+ years of backend development experience
- Strong experience in financial services / banking / fintech domain
- Proficiency in C#, .NET Core / .NET 8+, ASP.NET Core
- Experience building RESTful APIs and microservices
- Experience with SQL Server and relational database design
- Experience with Entity Framework / ORM tools
- Understanding of distributed systems and event-driven architecture
- Experience with cloud platforms (Azure, AWS, or GCP)
- Experience with Docker, Kubernetes, and CI/CD pipelines
- Strong knowledge of API security (OAuth2, JWT, OIDC) and data protection
- Knowledge of financial compliance standards (PCI, SOX)
- Production incident management, on-call troubleshooting, and RCA ownership
- Experience with PostgreSQL and MongoDB
- Experience with event streaming (Kafka, RabbitMQ)
- Knowledge of payment systems (ACH, RTP, cards, SWIFT)
- Experience with low-latency or real-time systems
- Familiarity with Redis, API gateways (Apigee), and Domain-Driven Design (DDD)
Axos Bank Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Axos Bank and has not been reviewed or approved by Axos Bank.
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Healthcare Strength — Health coverage includes medical, dental, and vision with multiple plan choices, plus HSA/FSA options and an Employee Assistance Program. Employer HSA contributions and extras like pet insurance and onsite fitness centers at some locations expand the wellness offering.
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Leave & Time Off Breadth — Time off includes around 15 days of vacation for new hires, paid sick leave, and up to 11 company holidays annually. Availability of certain perks and holiday specifics can vary by location or subsidiary, but the baseline PTO/holiday combination is broadly competitive.
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Retirement Support — A 401(k) with company match is offered alongside additional financial programs like a 529 plan, employee mortgage loans, and banking/trading perks. Automatic enrollment and structured matching underscore tangible retirement support for longer‑tenured employees.
Axos Bank Insights
What We Do
Axos is a technology-driven financial services company providing a diverse and ever-growing range of innovative products and services for personal, business and institutional clients nationwide. Powered by exceptional team members, a clearly defined set of values and a culture that is both meritocratic and self-governing, we are transforming banking as we know it. Our mission is summed up in two words: Banking Evolved. Banking Evolved means providing products and services that are technologically superior to our competitors and that offer our customers an unbeatable value proposition. Banking Evolved means continuously innovating and excelling in the following areas: • The incubation, creation and deployment of new businesses and tools that best serve our customers; • The evolution, optimization, delivery, distribution and marketing of our products; • The harnessing of data and technology to manage our business most effectively and efficiently; and • The development and engagement of our team members. To be part of the Axos team is to live our values as your own, to work with a strong sense of individual purpose and to embody a commitment to the shared success of our business. As a meritocracy, we believe that success is earned. We reward individuals on the basis of their achievements. As a self-governing organization, we derive strength from the internal resourcefulness of each individual. We emphasize independence, goal-setting and personal accountability.
