Genesis10 is currently seeking a Senior Software Engineer (API) for a contract position with a Major Financial Services Company located in Milwaukee, WI. This is a 11+ month contract opportunity.
Pay range: $63.00 - $68.00 per hour, W2. This role sits within the API Enablement team, a horizontal engineering group that builds and maintains the enterprise API tooling, governance automation, and developer experience platforms used by domain teams across the organization. The ideal candidate will collaborate with the team to build and maintain enterprise-grade internal tooling, contribute to the design and delivery of cross-cutting technical solutions, and support contract-first API development practices built around OpenAPI Specification (OAS).
Responsibilities: - Collaborate with the API Enablement team to build and maintain enterprise-grade internal tooling, API governance automation, and developer experience platforms
- Contribute to the design and delivery of cross-cutting technical solutions, including API quality enforcement engines, SDK generators, and the enterprise API catalog
- Support contract-first API development practices and tooling built around OpenAPI Specification (OAS)
- Participate in refinement, solution definition, and decomposition of features into deliverable work items
- Work across organizational boundaries with domain engineering teams, Enterprise Architecture, and API Management to deliver on the team's highest-priority initiatives
- Find opportunities for continuous improvement and own initiatives that help the team get better
- Engage collaboratively, respect diverse perspectives, and communicate effectively with both technical and non-technical audiences
Requirements: - Bachelor's Degree or equivalent experience
- 8+ years of professional software development experience
- 5+ years of experience with API design, development, and governance including OpenAPI Specification (OAS) and REST best practices
- Experience with Java and/or Node.js/TypeScript
- Proficient in practices such as contract-first API design, API quality automation, and internal platform/tooling development
- Proven track record of architecting and delivering significant developer tooling or platform solutions (e.g., SDK generators, compliance engines, API catalogs)
- Experience with Internal Developer Tooling and Platform Engineering
- Capable of working autonomously and delivering with minimal direction in an enterprise environment
- Effective communicator with product, engineering, architecture, and business partners, with proven ability to communicate to both technical and non-technical audiences in varying forms and levels of detail
Desired skills: - API Quality / Compliance Automation (e.g., Spectral)
- Client SDK Generation (e.g., OpenAPI Generator / Kiota)
- API Catalog / Developer Portal Experience
- Enterprise Authorization Patterns (PBAC or similar)
Only candidates available and ready to work directly as Genesis10 employees will be considered for this position. If you have the described qualifications and are interested in this exciting opportunity, please apply! Ranked a Top Staffing Firm in the U.S. by Staffing Industry Analysts for six consecutive years, Genesis10 puts thousands of consultants and employees to work across the United States every year in contract, contract-for-hire, and permanent placement roles. With more than 300 active clients, Genesis10 provides access to many of the Fortune 100 firms and a variety of mid-market organizations across the full spectrum of industry verticals.
For contract roles, Genesis10 offers the benefits listed below. If this is a perm-placement opportunity, our recruiter can talk you through the unique benefits offered for that particular client. Benefits of Working with Genesis10: - Access to hundreds of clients, most who have been working with Genesis10 for 5-20+ years.
- The opportunity to have a career-home in Genesis10; many of our consultants have been working exclusively with Genesis10 for years.
- Access to an experienced, caring recruiting team (more than 7 years of experience, on average.)
- Behavioral Health Platform
- Medical, Dental, Vision
- Health Savings Account
- Voluntary Hospital Indemnity (Critical Illness & Accident)
- Voluntary Term Life Insurance
- 401K
- Sick Pay (for applicable states/municipalities)
- Commuter Benefits (Dallas, NYC, SF, and Illinois)
For multiple years running, Genesis10 has been recognized as a Top Staffing Firm in the U.S., as a Best Company for Work-Life Balance, as a Best Company for Career Growth, for Diversity, and for Leadership, amongst others. To learn more and to view all our available career opportunities, please visit
Genesis10 is an Equal Opportunity Employer. Candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.
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