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Lead Software Engineer

Visa

$173,100 - $250,900
Sep 11, 2025
Highlands Ranch, CO, US
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Visa is looking for a Lead Software Engineer to focus on Encryption-related enhancements within the Connex Advantage switching application to solve complex challenges on a global scale related to new payment flows, business and data solutions, cyber security, and B2C platforms.

Requirements

  • Strong knowledge on HP Nonstop systems and Connex Advantage Architecture
  • 13+ years related experience working on Connex/eFunds software required.
  • Proven experience as a Connex developer or in similar roles
  • Proficiency in Programming languages TAL, C, COBOL, SCOBOL and TACL on the HP NonStop platform
  • Expertise in HP Nonstop tools like FUP, SCUP, Peruse, Inspect, Debug, Spoolcom, Pathway, Enform, DDL, Guardian Procedure calls, TCP/IP programing, TMF
  • Good understanding of ISO8583 message formats
  • Hands-on experience designing and implementing encryption for high throughput payment switching, including AES GCM or similar authenticated encryption, secure key storage, and hardened TLS (TLS 1.2/1.3, mTLS).

Responsibilities

  • Prepare technical documents, develop code, review code, build environment, review test results, and prepare plan for implementation
  • Analyze technical impact, stability, and functionality due to any custom change
  • Evaluate code to ensure it is valid, meets industry standards and is compatible with devices and/or operating systems
  • Develop or validate test routines and schedules to ensure that test cases mimic external interfaces
  • Lead design reviews and provide guidance to junior team members who are participating in design reviews.
  • Review design documentation with engineering team members, senior project members, and architects to validate design for completeness and ensure alignment with requirements across an application, project, or product.
  • Design and implement encryption controls for the Connex Advantage switch across data in transit and at rest, including strong TLS configurations (TLS 1.2/1.3, mTLS), authenticated encryption modes, and secure key storage.

Other

  • This collaborative, team-based role will require a close working relationship with Product owners, Software Architects, Quality Assurance, Technical Writers, UI Designers, Key Custodians and other Software Engineers.
  • Confer with management or development teams to prioritize needs, resolve conflicts, and help choose solutions
  • Build partnerships with product management to ensure that the products being built deliver real value
  • Provides strategic technical and functional knowledge of the e-commerce platform as well as a thorough understanding of the business to direct strategy on collecting and understanding requirements.
  • Leads meetings with product partners to recommend development and solution strategies that improve the design and functionality of interface features across a range of payment products.