Senior Software Engineer (Technical Lead)

Responsibilities

• Design, build, and deliver scalable, user-facing applications that support mission-critical workflows in a modern cloud environment.
• Own features end-to-end—from requirements and design through development, testing, and deployment.
• Collaborate directly with engineers, architects, and stakeholders to translate complex requirements into practical, working solutions.
• Develop and integrate RESTful APIs and data-driven services across distributed systems.
• Contribute to front-end development using Angular while supporting backend services in Node.js / NestJS.
• Debug and resolve issues across the stack, ensuring performance, reliability, and maintainability.
• Operate with a high degree of autonomy—able to move work forward independently while staying aligned with the broader team.
• Continuously improve code quality through testing, code reviews, enforcing coding standards and thoughtful design decisions.
• Mentoring fellow developers and encouraging overall team growth.
• Assisting in the removal of blockers to keep a high velocity within the team.

Qualifications

• 8+ years of professional software development experience.
• 4+ years of experience with JavaScript / TypeScript.
• Experience building backend services with Node.js and/or NestJS.
• Experience developing modern front-end applications using Angular (2+).
• Experience designing and integrating RESTful APIs and data-driven web applications.
• Experience working with relational databases (PostgreSQL).
• Experience working with non-relational databases (MongoDB).
• Proficiency working in an Agile environment (i.e. backlog refinement, story size estimation, etc).
• Ability to handle the creation/distribution of release notes.
• Coordination of application deployments.
• Experience identifying and communicating technical requirements needed to implement a feature.
• Experience identifying/collaborating with team over new technical work/gaps within applications.
• Strong problem-solving and troubleshooting skills.
• Excellent verbal and written communication skills.
• Ability to work independently in client-facing environments while collaborating effectively with a team.

Skills

• Experience with test automation frameworks with Playwright.
• Experience developing in Java and working with the Spring framework.
• Experience with containerization with Docker.
• Experience writing unit tests with Jest or Jasmine.
• Experience working in cloud environments (AWS preferred).
• An understanding of cloud services and when to utilize them.
• An understanding of technical architecture design.
• Experience completing Security Technical Implementation Guides (STIGs).

Benefits & Perks

• 100% covered health, dental and vision premium for employees, optional dependent coverage.
• Flexible Spending Account (FSA).
• 401k with employer match.
• Company Sponsored Life Insurance, Short and Long Term Disability coverage.
• Flexible PTO + all Federal holidays off.
• Home Office allowance.
• Reimbursement for trainings / certifications.
• Paid AWS Developer account.
• Annual Social Events (hackathon, holiday party, charity golf tournament, etc.).
• Access to 540's Washington Capitals tickets.

Equal Employment Opportunity (EEO)

540's policy is to provide equal employment opportunity to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.