Walter Kueffer

Director of Software Engineering

Building the AI
platform layer
for regulated systems.

Twenty years inside one of the largest financial technology platforms in the world, now extending into proprietary RAG, OIDC-secured MCP servers, and inner-source agent tooling that drives measurable productivity, quality, and security gains across the SDLC.

Selected Work

Outcomes I have shipped at production scale.

6 teams adoption

Proprietary RAG over decades of institutional knowledge

Built a pgvector-backed RAG pipeline indexing decades of documentation and operational behavior of a 50+ year old core platform. Exposed through two OIDC-gated MCP servers offering ~20 custom tools. Language-agnostic, currently in use across six engineering teams in Java, TypeScript, and C#.

4 plugins authored

Inner-source AI plugin marketplace

Established the company's first inner-source plugin marketplace to consolidate fragmented AI tooling efforts across teams. Defined promotion hierarchy, skill review process, and context-budget guardrails. Personally authored an end-to-end SDLC plugin covering test generation, code review, mutation testing, and PR submission.

69% MTTR reduction

Automated dependency patching at enterprise scale

Drove Renovate-based automated dependency patching, cutting mean time to remediate SCA vulnerabilities from 45 days to 14 across enterprise services.

35,000% deployment frequency

DORA-driven engineering practice

Championed DORA outcomes at organizational scale: 35,000% deployment frequency increase (12 to 4,200/year), 99.4% lead time reduction (14 days to 2 hours), 65% MTTR reduction, 91% change failure rate reduction, and 53% faster vulnerability remediation.

AI Assistant

WALL-E sends messages on my behalf.

A personal AI assistant that handles scheduling, reminders, and general coordination via SMS to family, friends, and service providers who have explicitly opted in.

Scheduling & Coordination

Coordinating appointments, confirming meeting times, and scheduling with service providers such as contractors, maintenance professionals, and vendors.

Reminders & Notifications

Appointment reminders, event details, task notifications, and calendar alerts sent to family members and contacts.

General Communications

Relaying messages, status updates, and time-sensitive information to known contacts on my behalf.

SMS Consent & Opt-In

By providing your mobile phone number to Walter Kueffer and agreeing to receive text messages, you consent to receive SMS messages from this service. To opt in, you must:

  1. Provide your phone number directly to Walter Kueffer (in person, by phone, email, or through this website)
  2. Receive a confirmation text and reply YES to confirm your consent

Message frequency: Varies. You may receive a few messages per week depending on scheduling needs.

Message and data rates may apply. Check with your mobile carrier for details.

To opt out: Reply STOP to any message at any time. You will receive a confirmation and no further messages will be sent.

For help: Reply HELP to any message, or contact wkueffer@gmail.com

By opting in, you agree to our Privacy Policy and Terms & Conditions. No mobile information will be shared with third parties for marketing or promotional purposes.

Sign Up for SMS Notifications

Walter Kueffer uses an AI assistant (WALL-E) to send SMS messages for scheduling, reminders, and general communications on his behalf. Enter your information below to subscribe.

Unsubscribe from SMS

Enter your phone number below to unsubscribe from all SMS messages. You can also reply STOP to any message at any time.

Contact

Best way to reach me.

Location

Winter Garden, Florida