ELLKAY, LLC is hiring: Senior Software Engineer in Elmwood Park

ELLKAY started out providing connectivity solutions to laboratories and within a few years, grew to also provide data management solutions to ambulatory organizations. ELLKAY is now a trusted data management partner in five healthcare segments. ELLKAY’s solutions continue to serve laboratories and ambulatory practices and have expanded to empower hospitals and health systems, healthcare IT vendors, ambulatory practices, health plans, and other healthcare organizations with cutting-edge technologies and solutions that drive their growth and interoperability strategies.

Today, ELLKAY remains true to our core values, building strong partner relationships and offering unparalleled service and support while providing innovative, scalable solutions to the challenges our customers face in today’s data-rich world.

ELLKAY's experience, customer-focused approach, and reputation for innovation, speed, and accuracy differentiate ELLKAY as a premier partner for your interoperability needs and data management strategy.

Job Description:

ELLKAY is seeking a Senior Software Engineer to play a crucial role in advancing our core healthcare IT systems through the development of scalable and secure software solutions. As a senior individual contributor, this position involves working closely with other engineering team leaders to architect robust backend systems, guide technical direction, and enhance software delivery processes.

Essential Duties & Responsibilities:

• Take a technical leadership role in building and scaling national-scale healthcare data exchange systems

• Deliver extremely reliable, scalable, and observable software capable of supporting massive transaction volumes

• Lead architecture and implementation of highly scalable, API-driven systems powering healthcare data exchange at scale

• Provide practical, balanced technical guidance—considering both engineering best practices and business priorities

• Guide design decisions on fault tolerance, throughput optimization, and system resilience

• Contribute to CI/CD pipeline improvements to maintain quality while accelerating delivery

• Collaborate with product and implementation teams to shape technical execution

• Document technical designs, workflows, and release notes for cross-team and customer consumption

• Participate in and lead design and code reviews

• Mentor engineers through pairing, design discussions, and pull request feedback

Qualifications:

• 10+ years of software engineering experience, with a focus on building large-scale, high-throughput distributed systems

• Have a balanced, pragmatic approach—able to apply the right level of engineering rigor to meet business needs

• Experience designing and scaling API-driven systems with extreme reliability and throughput requirements

• Experience with event-driven, queue-backed, and asynchronous processing architectures

• Skilled in observability practices including distributed tracing, metrics, and log aggregation

• Strong background in Microsoft SQL Server and experience optimizing relational data access

• Familiar with other database technologies (NoSQL, distributed databases)

• Deep experience with the .NET ecosystem, with exposure to other technical stacks as a plus

• Familiar with containerization, cloud-native architectures, and Kubernetes deployment patterns

• Strong architectural skills with a focus on reliability, scalability, and performance

• Proven ability to lead architecture across multiple systems and teams

• Experience writing and optimizing parallel and asynchronous code

• Strong knowledge of IHE profiles, FHIR, and other healthcare data exchange standards is a significant plus

• Front-end development experience with modern JavaScript/TypeScript frameworks is a plus but not required

• Bachelor’s degree or equivalent experience in a technical field

Benefits:

ELLKAY offers a comprehensive and competitive benefit package that starts day one!

Including:

• Medical, Dental, and Vision benefits
• Employer-paid Life and LTD
• 401k w/ matching – once eligibility is met
• Work/life balance
• Paid Volunteer Program
• Flexible working hours
• Unlimited PTO
• Remote work options
• Employee Discounts
• Parental Leave

Our awesome culture includes:

• Working with talented, collaborative, and friendly people who love what they do
• Professional growth within
• Innovation environment
• On site in HQ Free daily lunches

Additional information

At ELLKAY, we are committed to operating as a hybrid workplace, offering employees flexibility in how they structure their time between in-office and remote work. We recognize the significance of fostering connections, collaboration, and creativity within our office culture and its positive impact on our business. Our philosophy of operating as a hybrid workplace underscores our dedication to enabling employees to tailor work-life balance to their individual preferences. For those who do not live within 40 miles of one of our offices, we are open to considering remote work for candidates whose skills and experience strongly align with the role. While we prioritize a hybrid work environment for most roles, we understand the importance of flexibility and are open to remote work for specific positions and specialized skill sets.

For more information on our company, visit www.ELLKAY.com.

ELLKAY LLC is a Smoke-Free Workplace.

ELLKAY, LLC provides equal employment opportunities 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.