Senior Software API Engineer

What we do: 

ZEFR, Inc.  is the global leader in brand suitability targeting and measurement across the world's largest platforms. Zefr’s technology is helping to power the age of responsible marketing by putting advertisers in control of their content adjacencies based on their own unique brand safety and suitability preferences. As an official YouTube Measurement Program Partner, Meta for Business Partner, and TikTok for Business Partner, the company leverages patented machine learning and AI technology to offer major world brands and agencies more precise and transparent brand safety and suitability activation and advertisement impressions measurement solutions on scaled platforms. The company is headquartered in Los Angeles, California, with additional locations across the globe.

What you’ll do: 

We are seeking an experienced Senior Software Engineer with a strong background in SaaS development, API design, cloud distributed computing, and Kubernetes. This role is ideal for someone who has worked in smaller companies and has been hands-on with the details of building and scaling SaaS applications. As we transition to a much higher scale system and expand our API offerings, your expertise will be critical in ensuring our platform is robust, scalable, and secure.

If you are passionate about building scalable SaaS applications and enjoy working with cutting-edge cloud technologies, we would love to hear from you! 

Key Responsibilities:

• Lead the design, development, and maintenance of scalable and reliable SaaS applications with a strong focus on API development.

• Architect, implement, and maintain direct B2B and B2C APIs that are secure, performant, and user-friendly, tailored to the needs of our growing client base.

• Drive the scaling of our internal systems to support increased demand, ensuring high availability and fault tolerance.

• Implement and optimize Kubernetes-based deployments, ensuring seamless scaling and orchestration of containerized applications.

• Collaborate closely with product managers, designers, and other engineers to deliver high-quality software that meets both business and technical requirements.

• Write clean, maintainable, and well-documented code, following best practices in software engineering.

• Provide technical leadership, mentoring, and code reviews to junior engineers, fostering a culture of continuous improvement.

• Stay updated with the latest trends and technologies in cloud computing, SaaS, and distributed systems, and evaluate their potential application in our environment.

What we’re looking for:

• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field.

• 5+ years of experience in software development, with a focus on SaaS platforms and cloud-based applications.

• Strong experience in designing and developing APIs using modern frameworks (e.g., Node.js, Python, Java, Go). Proficiency in Python is required. 

• Deep understanding of cloud platforms such as AWS and GCP with experience in cloud-native development and deployment.

• Proficient in Kubernetes, including hands-on experience with container orchestration, Helm charts, and CI/CD pipelines.

• Experience with microservices architecture and distributed systems.

• Solid understanding of security best practices in API development and cloud computing.

• Strong problem-solving skills, with the ability to troubleshoot complex issues in a distributed environment.

• Excellent communication skills, with the ability to work effectively in a collaborative, agile team environment.

• Familiar and aligned with CI/CD and Agile practices.

• Data skills: Relational DB, SQL, Key-Value stores, GraphDB,  ElasticSearch ...

• Strong foundation in data structures, algorithms and software design.

• Drive to learn and experiment with new technologies, be creative and innovative, make a difference.

• Experience with DevOps practices, including automation, monitoring, and logging using tools like Terraform, Datadog, etc.

• Previous experience working in a startup or fast-paced tech environment.

What We Offer:

• Flexible PTO

• Medical, dental, and vision insurance with FSA options

• Company-paid life insurance

• Paid parental leave

• 401(k) with company match

• Professional development opportunities

• 10+ paid holidays off

• Summer Fridays (we leave early)

• Flexible hybrid work schedule

• In-office lunches and lots of free food

• Optional in-person and virtual events (we like to celebrate!)

Compensation (for US based employees):

This is a US remote position.

The anticipated salary for this position is between $170,000 and $190,000.  Within the range, individual pay is determined by factors such as job-related skills, experience, and relevant education or training. If your compensation expectations fall outside of this range, it may still be worth having a conversation.

Zefr is an equal opportunity employer that embraces diversity and inclusion in the workplace. We are committed to building a team that represents a variety of backgrounds, skills, and perspectives because we know this only makes us better.  We strongly encourage women, persons of color, LGBTQIA+ individuals, persons with disabilities, members of ethnic minorities, foreign-born residents, and veterans to apply even if you do not meet 100% of the qualifications.