Senior Full-Stack Engineer

About Aptia

Founded to shape the future of pensions, health, and insurance solutions, Aptia is a leading professional services firm dedicated to simplifying complexity for businesses and individuals. We bring together cutting-edge technology and deep industry expertise to help organisations navigate an evolving landscape with clarity and confidence.​

With a presence in the US, UK, India, and Portugal, we support over six million people and more than 1,100 clients, delivering solutions that drive efficiency, enhance financial security, and provide peace of mind.​

Our strength lies in the combination of smart technology and expert teams, ensuring that managing pensions, health, and insurance is more effective. By focusing on innovation, accessibility, and client success, we help businesses take care of their people, so they can focus on what they do best.

And we are expanding. Aptia Group is not only fueled by our investors' backing but also by our commitment to foster the growth and success of our people. At Aptia, we're investing heavily in learning and development, paving unique career paths for our colleagues.

Specialist. Responsive. Thoughtful. Our values aren't just words; they are the backbone of our business. Our team embodies our values daily, to surpass client expectations, evolve constantly and nurture genuine relationships for the long-term. 

Job requirements

At Aptia, we’re building technology that powers better benefits experiences through innovation, scale, and collaboration. As a Senior Full Stack Engineer, you’ll play a key role in designing and developing solutions that move our products forward — from the front-end experience to the cloud infrastructure that supports it.

You’ll collaborate closely with product, business operations, and client teams to translate complex requirements into elegant, scalable applications. This role offers the opportunity to shape technical decisions, mentor other engineers, and deliver high-quality, high-impact software that supports Aptia’s mission to simplify benefits administration for employers and their employees.

Location: This position is based in our Lake Mary, FL office as part of a hybrid working arrangement; you will be expected onsite three (3) days per week

What you'll be doing​

• Collaborate with product team, business operations, and customers to understand and develop product requirements​

• Design and implement scalable full stack applications and APIs​

• Develop responsive, user-friendly React frontend interfaces​

• Build robust backend services with comprehensive test coverage​

• Optimize database performance and manage complex data relationships​

• Architect and maintain cloud infrastructure on AWS​

• Write and maintain automated unit and integration tests​

• Collaborate with cross-functional teams to deliver high-quality solutions​

• Mentor junior engineers and contribute to technical decision-making​

• Participate in code reviews and maintain engineering standards

What we're looking for

• 8+ years of software development experience​

• Expertise in at least one strongly typed backend language: Java, Scala, Kotlin, C#, or Typescript​

• Frontend development experience with React and modern JavaScript/TypeScript​

• Advanced SQL skills with relational databases, preferably PostgreSQL, including: ​

• Complex queries with joins and subqueries​

• Common Table Expressions (CTEs)​

• Query optimization and performance tuning​

• Hands-on experience with core AWS services: ​

• Compute services (EC2 or ECS)​

• CloudFront (CDN and content delivery)​

• Elastic Load Balancer (ELB)​

• S3 (storage and data management)