Contractual Net Core Developer Jobs in Florida (NOW HIRING)

Job Description

FIS Management Services, LLC seeks Software Engineer Specialists-Payments API Platform (Real Time & Event Driven) in Jacksonville, FL to design, develop, and govern a companywide API and event platform, defining canonical models, structured data contracts, and versioning to enable interoperable, audit ready integrations. Evaluate system specifications for complex business requirements and prepare computer based solutions, and analyze problems in terms of detailed system and cloud resource capabilities to ensure scalability and resilience. Lead the architecture and operation of 247365, low-latency services with documented availability objectives and continuous operations patterns including active-active, automated failover. Establish and enforce security architecture for digital transactions using recognized frameworks, tokenization, and hardware-backed key management with validated cryptographic modules. Implement OAuth 2.0, JWT, TLS, RBAC, and secrets management. Integrate strong customer authentication where required, achieving zero high severity audit findings, SAST/DAST 90% coverage, and 100% on-schedule key rotations. Design and develop RESTful and event driven APIs using modern technologies including Java/Spring Boot, NET Core, Node.js, and Python Flask, with automated CI/CD. Set the reliability engineering program for APIs and event pipelines by defining SLIs/SLOs, implementing error-budget governance, standardizing runbooks and chaos/resiliency tests, and improving health. Implement end-to-end observability including traces, metrics, and logs with correlation and golden-signal dashboards. Engineer transaction integrity via idempotency, deduplication, replay/retry semantics, and safe-retry keys to deliver exactly-once-like outcomes. Own API spec governance for synchronous HTTP and asynchronous events-compatibility rules, deprecation policy, and contract/conformance tests. Drive performance engineering for high throughput, low latency services through partitioning, indexing, memory/GC tuning, and hot path optimizations. Lead structured data migration and interoperability with mapping guides, reconciliation controls, and cutover/rollback plans. Produce and maintain technical documentation-API specs, integration guides, reference adapters/SDKs, and test harnesses. Collaborate with product, engineering, compliance, and operations to translate requirements into measurable outcomes Chair design/risk reviews for ADRs, threat models, data classification, segregation of duties to align with risk, audit, and compliance. Verify program logic by preparing representative test data and executing trial runs in lower/UAT environments. Plan and oversee program level deliverables-dependencies, technical risks, cross-team cutovers.

REQUIREMENTS: Bachelor's degree or foreign equivalent in Computer Science, Computer Engineering, or related field and ten (10) years of progressively responsible experience in the job offered or a related occupation: evaluating systems specifications for complex business requirements and developing and preparing computer based solutions; analyzing problems in terms of detailed equipment requirements and capabilities, including those related to scalable applications and cloud based resources; troubleshooting complex technical issues; architecting, designing, and developing RESTful and/or event driven APIs using modern technologies including Java/Spring Boot; implementing industry standard security in API design including OAuth 2.0, JWT, TLS encryption, role based access controls, and secrets management; In the alternative, the employer will accept a Master's degree in the above listed fields and eight (8) years of experience in the above listed skills. Telecommuting and/or working from home may be permissible pursuant to company policies.

QUALIFIED APPLICANTS: Please apply directly through our website by clicking on "Apply Now."

Privacy Statement

FIS is committed to protecting the privacy and security of all personal information that we process in order to provide services to our clients. For specific information on how FIS protects personal information online, please see the Online Privacy Notice.

EEOC Statement

FIS is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, marital status, genetic information, national origin, disability, veteran status, and other protected characteristics. The EEO is the Law poster is available here supplement document available here

For positions located in the US, the following conditions apply. If you are made a conditional offer of employment, you will be required to undergo a drug test. ADA Disclaimer: In developing this job description care was taken to include all competencies needed to successfully perform in this position. However, for Americans with Disabilities Act (ADA) purposes, the essential functions of the job may or may not have been described for purposes of ADA reasonable accommodation. All reasonable accommodation requests will be reviewed and evaluated on a case-by-case basis.

Sourcing Model

Recruitment at FIS works primarily on a direct sourcing model; a relatively small portion of our hiring is through recruitment agencies. FIS does not accept resumes from recruitment agencies which are not on the preferred supplier list and is not responsible for any related fees for resumes submitted to job postings, our employees, or any other part of our company.

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