Strengthening Core APIs to Support New Digital Experiences

An established retirement services provider offering annuity products needed to strengthen the technology that helps its teams and business partners access product, fund, rate, and application data. With a complex application environment already in place, the company sought experienced engineers to add development capacity, improve its core APIs, and provide architectural guidance while working alongside the internal team.

SPR joined the client’s application development efforts to maintain and enhance essential services, apply modern API design practices, and support a more flexible integration model for external partners. The engagement helped the company build on its existing technology foundation while preparing for new digital experiences and future business needs.

SPR embedded experienced engineers within the client’s application team for approximately nine months. Rather than operating as a separate delivery group, the SPR team worked alongside the company’s technologists to develop new functionality, maintain existing services, and contribute to architectural and design discussions.

The work required engineers who could move easily between technical implementation and business conversations. SPR team members needed to understand stakeholders’ goals, translate those needs into development requirements, and then contribute production-ready code.

SPR also provided guidance on Agile delivery practices, code organization, and API architecture. This collaborative approach allowed the team to address immediate development needs while sharing practices the client could continue applying throughout its technology environment.

Supporting the client’s core services required more than familiarity with its technology stack. SPR engineers also needed to understand how annuity products were structured and how information about applications, funds, rates, and disbursements moved through the organization.

The team quickly developed the domain knowledge to investigate application issues, participate meaningfully in design conversations, and recognize how changes to one service could affect other parts of the business.

That understanding helped SPR connect technical decisions to the needs of the people and systems relying on the data. It also allowed the engineers to contribute as part of the client’s team rather than simply completing isolated development assignments.

The application environment included .NET technologies, PostgreSQL, and AWS-hosted infrastructure. Within that environment, multiple parts of the organization needed access to information on annuity applications, products, funds, and rates.

SPR assisted with creating, maintaining, and improving the APIs that made that information available. The team applied modern RESTful design practices so consuming applications could request the specific information they needed, rather than receiving unnecessarily broad sets of data.

These targeted services established clearer patterns for retrieving business information and made the APIs easier for other applications to use. The approach aligned with SPR’s broader focus on building custom software that fits an organization’s existing technology, users, and business goals.

SPR engineers also helped investigate application and submission issues when workflows did not behave as expected. This hands-on troubleshooting provided additional insight into the relationships among forms, business rules, application data, and downstream services.

Near the end of the engagement, one of the company’s business partners wanted to build its own user interface rather than rely entirely on the retirement provider’s existing application.

Supporting that model would require the partner’s system to interact directly with selected company services. The client therefore needed to determine which information should be available, how the external interface would request it, and which APIs would enable the integration.

SPR helped the client evaluate the integration and shape the services the partner could use to retrieve the necessary data. This approach marked a new integration model for the organization and an opportunity to give partners greater flexibility in how they created customer-facing experiences.

The work began laying a foundation for future software integrations in which outside platforms could connect to the provider’s capabilities without adopting its complete technology experience. SPR’s integration approach similarly emphasizes practical, maintainable APIs that support secure and reusable connections between systems.

SPR helped the retirement services provider strengthen the services supporting its annuity business without calling for a disruptive replacement of its established systems. Through embedded engineering support, the company gained additional capacity to maintain and extend its applications. Its team also benefited from architectural guidance, more focused RESTful API patterns and development practices designed to support future work.

The emerging partner integration further broadened possibilities. By beginning to make selected services available outside the company’s traditional application experience, the organization took an important step toward a more adaptable digital ecosystem.

Together, these efforts gave the client a stronger foundation for ongoing application development, internal data access, and future partner-led experiences.

Application development: .NET
Cloud environment: AWS
Database: PostgreSQL
Architecture: RESTful APIs
Delivery approach: Agile development