Jack Senechal
Engineering Leader /
Entrepreneur
Located in Novato, CA
Phone: 415-779-2701
Email:
jacksenechal@gmail.com
GitHub: github.com/jacksenechal
LinkedIn: linkedin.com/in/jacksenechal
Summary
Full-stack engineering leader and founder with a strong record
shipping production software and infrastructure, mostly at startups. No
big-company detour.
- AI-native delivery: runs agent-driven “software
factories” that carry engineering work from spec to shipped, with
harness-enforced SDLC discipline so agents move fast without breaking
things.
- Platform builder: designs internal tools and shared
primitives other teams build on, from integration middleware to
self-serve tooling.
- Turnaround leader: rearchitected an unreliable
integrations platform for ~100x error reduction and led
a zero-downtime Heroku to Kubernetes/RDS
migration.
- Founder, repeatedly: multiple co-founding ventures
spanning product, infrastructure, and launch.
- Owns outcomes: a rescuer of burning platforms, at
home with incomplete information, able to bring stakeholders and
engineers to clarity.
Industry Experience
Independent
Consultant · AI-Native Software Delivery
Client engagements
| May 2026 - Present | Remote
- Running “software factories”: agent-driven delivery pipelines that
carry engineering work from spec to shipped, human in the product seat.
Speed without fragility: production-quality output over
long-horizon iteration, where agentic development typically falls
down.
- Core thesis: the same DevOps and project-management
discipline that makes human teams work is the necessary and sufficient
foundation for agent teams, encoded into the harness and context.
- GitHub as coordination substrate: issues, PRs, and
Projects as the single ledger. Harness-enforced SDLC (independent
fresh-context reviewer, green CI, supply-chain scanning, deployment
smoke check) so agents move fast without breaking things.
- Self-improving harness: orchestration agents run,
observe, and refine the process, converging on and shipping their own
refinements.
- Chose React, TypeScript, and Next.js stack: their
tooling and feedback loops are very tractable for agents to work
in.
- Product ownership: rapid prototyping, requirements
gathering, defining and prioritizing the work, and verifying output
against deployed previews on behalf of a non-technical user base.
Co-founder & Fractional CTO
Building
Humane Technology | June 2025 - Present | Remote (part-time)
- Originated and co-architected HumaneBench.ai, an open-source AI
evaluation framework built on AISI Inspect.
Python.
- Fractional CTO to the team that built it into a published,
externally usable product, shaping architecture, scoring design,
multi-provider support, documentation, and positioning.
- Built a low-latency proof-of-concept classifier scoring model
behavior against HumaneBench rubrics inline at
sub-100ms, suitable for a production request path
rather than batch only.
- Designs telemetry for operational visibility and evaluation feedback
loops informing system-prompt iteration and fine-tuning. Owns the
technical roadmap: production monitoring, multi-turn evaluation,
adoption maturity models.
Co-founder & Software
Engineer
- Owned the front end of a production consumer subscription app: Rails
views, JavaScript, HTML/CSS, Tailwind, responsive UI/UX.
- Led design and UX delivery: worked directly with freelance
designers, translated Figma into the Rails framework. Collaborated on
the back end: Rails MVC, Stripe subscription billing, SSO
authentication.
- Made product and prioritization calls with co-founders: roadmap,
scope, what to ship next.
Infrastructure Engineer
Tobiko | Mar 2024 - Oct 2024
| Remote
- Architected and implemented a cloud platform serving customer
workloads at an early-stage startup. Python, Pulumi,
GCP, GKE, Cloud Run, Helm.
- Built CI/CD primitives the rest of engineering used: mono-repo
conditional workflows, workload identity federation, continuous
delivery.
- Owned build-vs-buy for support and incident response: selected
incident.io for incident management; after support tooling review found
nothing that handled Slack-based support cleanly, built the Slack
support agent from the ground up in Python and onboarded teammates and
customers onto it.
Engineering
Manager / Principal Software Engineer
Mavenlink /
Kantata | Apr 2017 - Dec 2023 | San Francisco, CA
- M-Bridge Integration Platform (2 yrs): Took over an
unreliable agent-based integration platform connecting the SaaS to
customer systems (Salesforce, HRIS, accounting) and led its
rearchitecture into a dependable one. Cut error rates roughly
100x by instrumenting the system and fixing what the data
pointed at. Executed a zero-downtime migration from
Heroku to Kubernetes and RDS, including relational, document, and cache
stores.
- Internal Infrastructure Platform (4 yrs): Built a
new team from scratch whose product was the platform the entire
engineering org built on. Ran it as a service org with internal
customers: consulted with teams on their workflows, triaged requests,
and turned recurring one-off asks into shared primitives and self-serve
tooling so teams could ship without waiting on us. Owned the roadmap
while staying hands-on in code, architecture, and review. Migrated a
large legacy Rails monolith and its service ecosystem to cloud-native
infrastructure (Terraform, Ansible, Kubernetes).
- Rebuilt the team after mass departures: inherited a two-person
DevOps team with one member two weeks from leaving, rebuilt hiring,
onboarding, documentation, and on-call practice into a stable team with
strong developer relations.
- Led a transition team that took ownership of the BI/analytics
pipeline and migrated it to Kubernetes.
- Shipped React features in the customer-facing
product and worked in its Redux state management,
alongside the platform and infrastructure work.
- Grew multiple junior engineers into senior SWE and Engineering
Manager roles; led interviewing and hiring. Top Performer Award,
2021.
Lead Developer, Co-founder
Pegg | 2014 - 2017 | San
Francisco, CA
- Designed, architected, and built a cross-platform mobile app from
scratch for iOS and Android. Node.js backend, JavaScript frontend with
Redux state management, Firebase real-time systems,
CI/CD to AWS/CloudFront via CircleCI.
- Established the engineering workflow from nothing (pair programming,
automated testing, CI, rapid deployment) and co-led product strategy,
monetization, and launch planning.
Earlier Career (2001 - 2014)
Full-stack consulting and lead roles in Ruby on Rails, Node.js, and
D3 (OpenTest Pro, Turnbull & Asser e-commerce). Introduced automated
testing and CI at OnForce. Architected the initial release of
mynewsletterbuilder.com and built its dev team at JBA Network.
Open Source Projects
Scan MCP (2024 - Present): MCP server giving AI
agents control of document scanners. Privacy-first architecture, device
discovery, JSON Schema validation, stdio and HTTP transports.
TypeScript/Node.js. github.com/jacksenechal/scan-mcp
HumaneBench (2024 - Present): Open-source LLM
evaluation framework built on AISI Inspect. See Building Humane
Technology above. Python. github.com/buildinghumanetech/humanebench
Skills
- Languages & Frameworks: Python, TypeScript,
JavaScript, React, Vue, Node.js, Ruby on Rails, Bash, HTML, CSS,
Tailwind.
- Front-end: responsive design, UI/UX collaboration
with designers, Figma handoff.
- Back-end & Data: API design, microservices,
distributed systems, PostgreSQL, MySQL, MongoDB, Redis, Stripe,
SSO/auth.
- AI/LLM: LLM evaluation frameworks (AISI Inspect),
MCP servers, chatbot development, prompt engineering, context
augmentation, agentic coding workflows.
- Infrastructure & CI/CD: AWS, GCP, Kubernetes,
Docker, Terraform, Pulumi, Ansible, Helm, GitHub Actions, CircleCI,
infrastructure as code, automated testing, TDD.
- Product: Roadmap ownership, product discovery with
users, prioritization, scope negotiation, cross-functional
collaboration.
- Leadership: Team building, hiring, coaching and
mentoring, roadmap ownership, org change management, stakeholder
engagement.
Education
BA in Mathematics,
minor in Computer Science
University
of North Carolina at Asheville | May 2003
- Graduated with distinction in Mathematics. Undergraduate research in
4D fractals.
Recommendations
“Jack is an exceptional engineer and leader. He
strives to deeply understand the technology he’s
working on while remaining cognizant of the socio-technical components
that may be a factor in any project. He’s thorough, detail-oriented, and
outcome-oriented, which means the solutions he architects,
builds, and collaborates on come out better. He does all this
with a strong team mentality, is a phenomenal team
player, and can effectively delegate to help lift others’ skill
sets.”
— Brandon Clifford, Director of DevOps, Kantata
“Jack has had quite a profound impact on my career.
As a young engineer, I was fortunate enough to work with Jack as my
coach. He served as a great mentor, helping me build both technical and
professional skills and forming me into the engineer that I am
today. His mentorship was a key factor in elevating me
from an incoming Junior Engineer to an Engineering
Manager.”
— Wesley Morlock, Engineering Manager, Kantata
“With Jack, the more complex the problem, the more simple his
solutions. Master Senechal is more than a mind to be reckoned
with, he’s an integrative capacity builder with a wide
range of technological expertise. If there is anything that can
be done through web development, Jack can figure out how to do it, and
make it happen.”
— Adam Apollo, Cofounder & CEO, Superluminal Systems
“Jack has a flair for finding better, faster, and more
reliable ways to get things done. He advocates best practices,
like unit testing, and has a deep knowledge of OO architecture.
Jack thinks on his toes, and will always be there with
the team at 4 a.m. if circumstance requires it.”
— Greg Whitescarver, Founder, Mojave
“Jack is a fantastic engineer always ready to help solve
problems and more importantly, teach you how to solve them. He
guided me and my team through a bunch of challenging GitOps situations
with patience and kindness, leading by example. Always diligent with his
work, willing to roll up his sleeves to get things done and find
creative solutions.”
— Cesar Palafox Garza, Principal Software Engineer,
Kantata
See additional
recommendations on LinkedIn