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Flexspring Tech Stack

HR data integration and migrations for enterprise systems

IT Services and IT Consulting Boston, MASSACHUSETTS 51–200 employees Founded 2013 Privately Held

Flexspring is a specialized HR data integration firm serving mid-market and enterprise companies with HR-system migrations and ongoing data-pipeline work. The stack is Java-heavy (Java, Spring, Groovy) with REST/SOAP bridges to major HR platforms (Workday, ADP, UKG, Oracle HCM Cloud, BambooHR, Salesforce Service Cloud), signaling deep expertise in legacy and modern HR-system connectors. Hiring leans engineering and ops—not sales-driven—which aligns with their project list (integration projects, go-live launches, UAT cycles) rather than land-grab expansion.

Tech Stack 24 technologies

Core StackJava JavaScript GraphQL Postman Salesforce Spring JUnit React Workday ADP BambooHR Groovy REST API Insomnia Service Cloud Oracle HCM Cloud JMS UKG Dayforce REST SOAP

What Flexspring Is Building

◆Challenges

Complex integration challenges
Improving workforce data accuracy
Production issues in customer integrations
Support sla adherence
Less costly to manage
Manual data entry
Reducing compliance risk
Lowering integration costs

▲Active Projects

Renewal process
Upsell and expansion opportunities
Strategic account planning
Go live launch
User acceptance testing
Integration projects connecting hr, payroll, and financial systems
Data reporting
International expansion support

Hiring Activity

Steady8 roles · 3 in 30d

Department

Engineering

3

Ops

2

HR

1

Sales

1

Support

1

Seniority

Mid

7

Senior

1

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About Flexspring

Flexspring provides data-integration services focused exclusively on HR workflows. The company tackles two core problems: helping organizations migrate data into new HR systems and building ongoing integrations between HR, payroll, and financial platforms to eliminate manual re-entry. Their engineering practice runs on Java and Spring, with connectors to Workday, ADP, UKG, BambooHR, Oracle HCM Cloud, and Salesforce. Founded in 2013, Flexspring operates from Boston with 51–200 employees and currently hires in the United States and Canada. Active projects include go-live launches, user-acceptance testing cycles, and strategic account planning, while pain points center on production-integration stability, compliance risk, and reducing customer support burden.

HeadquartersBoston, MASSACHUSETTS

Company Size51–200 employees

Founded2013

Hiring MarketsCanada

Frequently Asked Questions

What tech stack does Flexspring use?

Flexspring builds on Java, Spring, Groovy, and REST/SOAP APIs. Primary HR-platform connectors include Workday, ADP, UKG, Oracle HCM Cloud, BambooHR, and Salesforce Service Cloud. Testing and API tools include Postman, Insomnia, and JUnit.

Is Flexspring hiring engineers?

Yes. Flexspring has 3 active engineering roles (posted roles are mid and senior-level), plus 2 ops openings. Hiring is steady across the US and Canada.

What does Flexspring do?

Flexspring specializes in HR data integration: migrations into new HR systems, ongoing data pipelines between HR/payroll/finance platforms, and integration hosting to eliminate manual data re-entry at mid-market and enterprise companies.