Senior Software Engineer

Role Description

As a Senior Software Engineer, you will help shape the future of our Loan Origination and Servicing platform — the digital foundation for how capital is structured and deployed. You will design and build scalable applications and services that power real-time insights and complex financial workflows. By combining strong backend architecture with thoughtful system design, you will deliver high-performance solutions that enable smarter decision-making across the business.

Primary Responsibilities

• Design, build, and maintain scalable, high-quality applications across new and existing product lines.
• Own features end-to-end — from architecture and development through testing, deployment, and iteration.
• Architect and evolve our core stack (Python, FastAPI, Vue.js, PostgreSQL, Redis, Docker, Kubernetes).
• Translate complex business and product requirements into elegant, reliable technical solutions in collaboration with Product and business stakeholders.
• Drive improvements in performance, reliability, testing, and CI/CD practices.
• Mentor engineers and contribute to a culture of engineering excellence and accountability.
• Perform other duties as assigned.

Qualifications

• 6+ years of professional software development experience.
• Bachelor’s degree in Computer Science or a related field (or equivalent practical experience).
• Strong experience building APIs and backend services in Python, including OpenAPI-based service contracts.
• Experience developing and deploying containerized applications in AWS environments, including event-driven architectures.
• Experience in real estate finance or financial services preferred.

Requirements

• Deep proficiency in Python (3.6+) and modern backend frameworks such as FastAPI, with a strong focus on clean, maintainable architecture.
• Strong expertise in SQL databases, including schema design, query optimization, and performance tuning.
• Ability to design efficient, scalable backend systems, including background processing, queues, caching strategies, and scheduled jobs.
• Strong understanding of testing strategies across unit, integration, and end-to-end levels.
• Working knowledge of system design documentation practices, including UML and architectural diagrams.
• Familiarity with event sourcing and/or Domain-Driven Design (DDD) principles.
• Ability to leverage AI-enabled development tools to enhance design, implementation, and testing workflows.
• Demonstrated ownership mindset with a commitment to quality, accountability, and continuous improvement.
• Agile mindset with the ability to work independently, provide early feedback, and adapt to evolving requirements.
• Ability to show ownership of your work, take on challenges and acknowledge growth opportunities, and demonstrate patience when learning new processes.
• Courtesy, respect, and thoughtfulness in teaming with colleagues and other stakeholders.

Benefits

• The opportunity to join one of Fortune Magazine’s Great Places to Work winners.
• Comprehensive benefit options that have earned Walker & Dunlop the gold level of the 2025 Cigna Healthy Workforce Designation™, some of which include:
• Up to 83% subsidized medical payroll deductions.
• Competitive dental and vision benefits.
• 401(k) + match.
• Pre-tax transit and commuting benefits.
• A robust health and wellness program – earn cash rewards and gain access to resources that promote health, engagement, and balance.
• Paid maternity and parental leave, as well as other family paid leave programs.
• Company-paid life, short and long-term disability insurance.
• Health Savings Account and Healthcare and Dependent Care Flexible Spending.
• Career development opportunities.
• Empowerment and encouragement to give back – volunteer hours and donation matching.