Software Engineer (.NET/React + SDK Arch

JOB REQUIREMENTS: Location: Hbyrid WFH - Greater Madison Area Duration:Open; initial 6-12 months with potential extension Number of positions-2-3 Equipment -candidates must use their own equipment. Currentlyseeking a Software Engineer with strong .NET Core (C#) and React.jsdevelopment experience, ideally combined with hands-on knowledge ofFiserv SDKs (Architect SDK, FirstAPI). This role will support financialproduct integrations, focusing on mobile and web SDK implementation,secure API connections, and ACH payment workflows. Candidates withdirect Fiserv SDK experience are highly preferred. However, strong .NETand React engineers who can learn and adapt quickly to the SDK will alsobe considered. Key Responsibilities Design, develop, and maintainsoftware using .NET Core (C#) and React.js. Integrate FiservArchitect SDK for mobile and web applications. Implementserver-to-server and client integrations with Fiserv FirstAPI Gateway. Work with RESTful APIs secured via HMAC authentication, OAuth2session tokens, and payload encryption. Support ACH paymentworkflows, including enrollment, tokenization, updates, and accountclosure. Configure and customize SDK-driven UI workflows (multi-stepscreens, multilingual, error handling). Ensure secure management ofAPI keys, secrets, and tokens, following compliance and security bestpractices. Collaborate with cross-functional stakeholders(architecture, engineering, product) to align designs with businessneeds. Troubleshoot and resolve integration issues across SDK, APIs,and backend systems. Required Qualifications 5+ years of softwareengineering experience. Strong skills in .NET Core (C#) and React.jsdevelopment. Familiarity with SDK integration (mobile/web),especially in financial services or payments. Knowledge of APIintegration patterns (REST, OAuth2, HMAC, encryption). Experienceworking in enterprise architecture environments with scalability andcompliance requirements. Strong analytical, debugging, andproblem-solving skills. Preferred Qualifications Hands-on experiencewith Fiserv Architect SDK and Fiserv FirstAPI gateway. Understandingof ACH payments, tokenization, and secure data flows. Experience withmobile SDK integration (iOS, Android) in addition to web. Located inMadison, WI (preferred) or MN/IL. Beacon Hill is an equal opportunityemployer and individuals with disabilities and/or protected veterans areencouraged to apply. California residents: Qualified applications witharrest or conviction records will be considered for employment inaccordance with the Los Angeles County Fair Chance Ordinance forEmployers and the California Fair Chance Act. If you would like tocomplete our voluntary self-identification form, please click here orcopy and paste the following link into an open window in your browser:Completion of this form isvoluntary and will not affect your opportunity for employment, or theterms or conditions of your employment. This form will be used forreporting purposes only and will be kept separate from all otherrecords. Company Profile: Beacon Hill Technologies, a premier NationalInformation Technology Staffing Group, provides world class technologytalent across all industries utilizing a complete suite of staffingservices. Beacon Hill Technologies' dedicated team of recruiting andstaffing experts consistently delivers quality IT professionals to solveour customers' technical and business needs. Beacon Hill Technologiescovers a broad spectrum of IT positions, including Project Managementand Business Analysis, Programming/Development, Database,Infrastructure, Quality Assurance, Production/Support and ERP roles. APPLICATION INSTRUCTIONS: Apply Online:position is isted by a private employment agency. The agency isthe legal employer. No fee will be charged of the job applicant.

Created: 2025-10-06