Who We Are

At Justworks, you’ll enjoy a welcoming and casual environment, great benefits, wellness program offerings, company retreats, and the ability to interact with and learn from leaders in the startup community. We work hard and care about our most prized asset - our people.

We’re helping businesses get off the ground by enabling them to focus on running their business. We solve HR issues. We’re data-driven and never stop iterating. If you’d like to work in a supportive, entrepreneurial environment, are interested in building something meaningful and having fun while doing it, we’d love to hear from you.

We’re united by shared goals and shared motivations at Justworks. These are best summed up in our company values, which are reflected in our product and in our team.

Our Values

If this sounds like you, you’ll fit right in.

Department

Engineering

Who You Are

Are you passionate about API design and development? Do you have experience building, deploying, and maintaining large-scale, distributed systems? Are you ready to leverage your skills to drive innovation in a supportive, entrepreneurial environment?

As a Senior Software Engineer specializing in APIs, you will play a critical role in architecting and maintaining the services that power our platform. You will use your deep expertise in service-oriented architecture to design scalable, reliable, and secure APIs. You are committed to engineering excellence, employing automated testing and continuous integration as productivity multipliers. You have a strong desire to understand complex systems and a drive to make them work better. In this role, you will collaborate closely with product managers, UX designers, and other engineers to scope, design, and build new API functionalities, ensuring they meet the highest standards of performance and reliability. Your primary focus will be on backend development using Go, with a willingness to support frontend integration where necessary.

Your Success Profile

What You Will Work On

Collaborate with cross-functional teams to identify and solve customer challenges through robust API solutions.
Take ownership of designing and developing high-performance, scalable APIs that support our partner integrations and core services.
Lead by example, promoting engineering excellence through technical leadership, knowledge-sharing, and mentorship within the team.
Enhance the reliability and scalability of our high-volume, fault-tolerant processing infrastructure.
Implement and optimize internal services to support seamless service-to-service communication.
Continuously improve our testing, monitoring, and continuous deployment infrastructure to ensure the resilience and security of our APIs.
Ensure that sensitive data handled by our APIs remains secure and compartmentalized.
Perform other related duties as assigned, including contributing to frontend integration efforts when needed.

How You Will Do Your Work

As a Senior API Software Engineer, your ability to deliver results is driven by your foundational knowledge, skills, and personal attributes, anchored in the following competencies:

Good Judgment - Apply critical thinking to analyze, assess, and solve complex problems, understanding risks and making informed decisions.
Resourcefulness - Demonstrate a can-do attitude, overcoming obstacles and constraints with innovative solutions, even when faced with unknowns.
Teamwork and Communication - Work effectively with others, building strong relationships, communicating clearly, and sharing knowledge to achieve collective success.
Influence and Leadership - Lead by example, mentoring others, fostering collaboration, and driving forward-thinking initiatives.
Skills and Knowledge - Continuously learn and apply specific domain knowledge and best practices to enhance and improve our APIs and services.

In addition, all Justworkers focus on aligning their behaviors to our core values known as COGIS. It stands for:

Camaraderie - Day to day you can be seen working together toward a higher purpose. You like to have fun. You’re an active listener, treat people respectfully, and have a strong desire to know and help others.
Openness - Your default is to be open. You’re willing to share information, understand other perspectives, and consider new possibilities. You’re curious, ask open questions, and are receptive to thoughts and feedback from others.
Grit - You demonstrate grit by having the courage to commit and persevere. You’re committed, earnest, and dive in to get the job done well with a positive attitude.
Integrity - Simply put, do what you say and say what you’ll do. You’re honest and forthright, have a strong moral compass, and strive to match your words with your actions while leading by example.
Simplicity - Be like Einstein: “Everything should be made as simple as possible, but no simpler.”

Qualifications

Minimum of 5 years of professional hands-on experience in software development, specifically with API design and implementation.
Expert proficiency in Go, with extensive experience in building and scaling high-performance RESTful APIs.
In-depth understanding of OAuth2, MySQL, Docker, Redis, and service-oriented architectures, with a proven track record of implementing and optimizing these technologies in production environments.
Significant experience with OpenAPI specifications and service-to-service communication, including the ability to lead the design and documentation of API contracts.
Proven leadership experience in guiding architectural decisions and mentoring junior engineers.
Working knowledge of Ruby on Rails and a willingness to contribute to or oversee its integration within the broader system.
Familiarity with modern frontend frameworks, particularly Vue.js, to support integration and collaboration with frontend teams, with the ability to contribute to full-stack solutions as needed.
Strong understanding of data structures, algorithms, and system design, with the ability to apply this knowledge to solve complex problems at scale.
Experience working in Agile/Scrum methodology in a fast-paced environment, with a history of delivering on deadlines and milestones in a high-growth setting.
Demonstrated ability to lead and influence cross-functional teams, driving the successful delivery of complex projects.

Technologies Used

Go, MySQL, OAuth2, Docker, Redis, REST APIs, OpenAPI, Microservices, Vue.js, AWS, Git, CircleCI, DataDog, Ruby on Rails

The base wage range for this position based in our New York City Office is targeted at $167,500.00 to $205,000.00 per year.

Actual compensation is based on multiple factors that are unique to each candidate, including and not limited to skill set, level of relevant experience, and specific work location. Salary ranges for positions based in other locations may differ based on the cost of labor in that location.

For more information about Justworks’ Total Reward Philosophy, including all of the perks and benefits we are proud to offer our team members, please visit Total Rewards @ Justworks.

Diversity At Justworks

Justworks is committed to maintaining a workplace where diversity of identity, culture, and life experience is the norm and is celebrated authentically and respected consistently. Diversity in our work, our people, and our product drives creativity and innovation, entrepreneurial leadership and integrity, competitiveness, and collaboration throughout our business and in the market. We depend on our differences to make our team stronger, our workplace more dynamic, and our product accessible to all of our customers.

We’re proud to be an equal opportunity employer open to all qualified applicants regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital or familial status, disability, pregnancy, gender identity or expression, veteran status, genetic information, or any other legally protected status. Justworks is fully dedicated to providing necessary support to candidates with disabilities who may require reasonable accommodations. We also provide reasonable accommodations to employees based on their sincerely held religious beliefs, as well as for other covered reasons consistent with applicable federal, state, and local laws. If you’re in need of a reasonable accommodation, please reach out to us at [email protected]. Your comfort and success matter to us, and we’re here to ensure an inclusive experience.

Our DEIB Report and Our DEI Commitment

Compensation Overview

Who We Are

Department

Who You Are

Your Success Profile

What You Will Work On

How You Will Do Your Work

Qualifications

Diversity At Justworks

6 month growth

1 year growth

2 year growth

Simplify's Take

What believers are saying

What critics are saying

What makes Justworks unique

Benefits