Connexus Technology, LLC

Senior Engineer – Integration & API Architecture

⭐ - Featured Role | Apply direct with Data Freelance Hub
This role is for a Senior Engineer – Integration & API Architecture, a 6-month contract position with a pay rate of "$X/hour". Key skills include API architecture, event-driven systems, and modern security practices. Experience in highly regulated industries is preferred.
🌎 - Country
United States
💱 - Currency
$ USD
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💰 - Day rate
624
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🗓️ - Date
July 2, 2026
🕒 - Duration
Unknown
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🏝️ - Location
Unknown
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📄 - Contract
Unknown
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🔒 - Security
Unknown
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📍 - Location detailed
United States
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🧠 - Skills detailed
#MDM (Master Data Management) #Scala #Data Security #Strategy #Data Architecture #Security #Leadership #Data Management #AWS (Amazon Web Services) #Microservices #AI (Artificial Intelligence) #Boomi #Kafka (Apache Kafka) #REST API #API (Application Programming Interface) #REST (Representational State Transfer)
Role description
We are seeking a highly experienced Senior Engineer – Integration & API Architecture to lead the design, implementation, and governance of enterprise API and integration solutions. This is a hands-on technical leadership role for an experienced engineer who thrives in fast-paced environments, can work independently, and is comfortable navigating ambiguity while driving technical initiatives to completion. The ideal candidate has deep expertise in API architecture, event-driven systems, enterprise integration patterns, and modern authentication and security practices. Key Responsibilities • Lead the API and integration intake process, including solution design, prioritization, and implementation across multiple initiatives. • Design, develop, and govern enterprise API standards using REST and event-driven architectures. • Define and enforce API contracts, integration best practices, and governance frameworks. • Design secure integration solutions, including tokenization and protection of sensitive data (PII/NPI) across environments. • Build and support scalable synchronous and asynchronous integration patterns. • Configure, manage, and optimize API gateway and integration/orchestration platforms. • Design and support event streaming solutions using Kafka or AWS MSK. • Contribute to workflow orchestration using Temporal or similar durable execution frameworks. • Ensure API contracts align with enterprise data models and collaborate closely with data architecture teams. • Provide hands-on technical leadership, mentor engineering teams, and remove implementation roadblocks. • Drive architecture decisions while balancing scalability, security, performance, and maintainability. Required Qualifications • Extensive experience designing and implementing enterprise API and integration architectures. • Strong expertise with RESTful APIs, OpenAPI, and event-driven integration patterns. • Experience with API governance, lifecycle management, and contract design. • Hands-on experience with API gateway platforms such as Gravitee, Apigee, Kong, AWS API Gateway, or similar. • Experience with integration/iPaaS platforms such as Workato, MuleSoft, Boomi, or equivalent. • Strong knowledge of OAuth 2.0, OpenID Connect (OIDC), and modern API security practices. • Experience implementing event-driven architectures using Kafka, AWS MSK, or similar messaging platforms. • Experience implementing tokenization or other data protection solutions for sensitive information. • Strong understanding of microservices and distributed systems. • Excellent problem-solving skills with the ability to work independently and lead technical initiatives. Preferred Qualifications • Experience with Gravitee and/or Workato. • Experience with Temporal or similar workflow orchestration platforms. • Familiarity with AsyncAPI specifications. • Experience with canonical data models, enterprise data architecture, or Master Data Management (MDM). • Exposure to AI agent orchestration frameworks such as LangGraph or similar technologies. • Experience working within highly regulated industries such as financial services, insurance, or healthcare. Desired Skills • Enterprise API Architecture • Integration Architecture • Event-Driven Architecture • Kafka / AWS MSK • API Gateway Management • REST APIs • OAuth2 / OpenID Connect • Microservices • API Governance • Integration Platforms (Workato, MuleSoft, Boomi, etc.) • Data Security & Tokenization • Strong communication and stakeholder management skills If you are passionate about building scalable integration solutions and driving enterprise API strategy while remaining hands-on with implementation, we encourage you to apply.