Senior Backend Engineer

Company Overview

AdCellerant is an award‑winning tech‑enabled services company that has brought Madison Avenue–level digital marketing solutions to Main Street businesses since 2013. We help local marketers, media companies, agencies, and channel sales organizations leverage our proprietary advertising software platform, Ui.Marketing.

We are looking for a highly skilled, self‑directed Senior Backend Engineer with a strong polyglot mindset. Our ecosystem relies on both Node.js and Java. The engineer will own complex technical challenges from conception to deployment and leverage AIs to accelerate development.

• Architect, build, and maintain robust backend services across both Node.js and Java environments.
• Design scalable, highly available backend architectures and APIs (Graph
  
  QL, REST) that integrate seamlessly with frontend applications and diverse backend microservices.
• Design and optimize database schemas (SQL and No
  
  SQL) to ensure data integrity and high performance.
• Maintain high standards of code quality through code reviews, automated CI/CD pipelines, and mentorship.
• Proactively identify performance bottlenecks and security vulnerabilities, implementing solutions independently.
• Actively utilize AI development tools (e.g., Git Hub Copilot, Cursor) to accelerate coding and translate logic between Node.js and Java ecosystems.

• 5+ years of professional backend software development experience.
• Deep, expert‑level knowledge in at least one core language with strong capability in the other:
  Node.js (Type Script, NestJS, Express, Fastify) or Java (Spring Boot, modern Java).
• Polyglot mindset: demonstrated ability and willingness to learn new languages and frameworks quickly.
• AI tooling fluency: proven experience using AI coding assistants and prompt engineering.
• Strong experience with relational databases (Postgre
  
  SQL, MySQL) and No
  
  SQL databases (Redis, Elasticsearch).
• Solid understanding of cloud platforms (AWS, GCP, Azure), containerization (Docker, Kubernetes), modern CI/CD pipelines.
• Demonstrated autonomy in highly autonomous environments.
• Experience building, scaling, and communicating between event‑driven microservices written in different languages.
• Experience integrating AI APIs (OpenAI, Anthropic) into production applications.
• Contributions to open‑source projects or a portfolio showcasing independent, multi‑language project execution.

Preferred to be located near our Denver, CO office, with hybrid work from home flexibility.

Salary Range: $ – $ annually, depending on experience and qualifications.

• Paid vacation, holidays, and sick days
• Health/dental/vision benefits
• 401(k) retirement plan with company match
• Generous paid parental leave
  
  Wellness program
• Work‑from‑home flexibility
• Denver, CO headquarters for hybrid work with in‑office perks

AdCellerant is proud to be an equal‑opportunity workplace. We are committed to providing an environment of mutual respect where equal employment opportunities are available to all applicants and teammates regardless of race, religion, color, national origin, gender, sexual orientation, gender identity, marital status, citizenship, age, veteran status, and other protected characteristics.

• Currently legally authorized to work in the United States on a full‑time basis.