Senior Backend Engineer

AdCellerant; Denver (CO); Hybrid; USD 135,000 - 165,000; Full time

Benefits offered by this job

Paid vacation, holidays, and sick days

Health/dental/vision benefits

401(k) retirement plan with company match

Generous paid parental leave

Work-from-home flexibility

Job summary

A tech-enabled services company is looking for a Senior Backend Engineer based in Denver, CO. The role involves architecting and maintaining backend services using Node.js and Java. Candidates should have over 5 years of experience and strong skills in modern cloud platforms and databases. The position offers a salary between $135,000 and $165,000 annually along with various benefits, including paid time off and health coverage. The role supports flexible working arrangements.

Qualifications

• 5+ years of professional backend software development experience.
• Deep knowledge in at least one core language with strong capability in the other.
• Demonstrated ability and willingness to learn new languages and frameworks quickly.

Responsibilities

• Architect, build, and maintain robust backend services across both Node.js and Java environments.
• Design scalable, highly available backend architectures and APIs that integrate with frontend applications and microservices.
• Maintain high standards of code quality through code reviews and mentorship.

Skills

Node.js (TypeScript, NestJS, Express, Fastify)

Java (Spring Boot, modern Java)

AI tooling fluency

Relational databases (PostgreSQL, MySQL)

NoSQL databases (Redis, Elasticsearch)

Cloud platforms (AWS, GCP, Azure)

Containerization (Docker, Kubernetes)

Job description

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.

Role Summary

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.

Responsibilities

• Architect, build, and maintain robust backend services across both Node.js and Java environments.
• Design scalable, highly available backend architectures and APIs (GraphQL, REST) that integrate seamlessly with frontend applications and diverse backend microservices.
• Design and optimize database schemas (SQL and NoSQL) 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., GitHub Copilot, Cursor) to accelerate coding and translate logic between Node.js and Java ecosystems.

Requirements

• 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 (TypeScript, 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 (PostgreSQL, MySQL) and NoSQL 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.

Location

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

Compensation

Salary Range: $135,000.00 – $165,000.00 annually, depending on experience and qualifications.

Benefits

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

Equal Opportunity

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.

Other Requirements

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