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.
- AI-native delivery: agent-driven “software
factories,” from spec to production.
- Platform leadership: built the platform an entire
engineering org ran on.
- Modernization at scale: multi-year legacy monolith
to cloud-native.
- Reliability: cut platform error rates roughly 100x,
on-call incidents from weekly to quarterly.
- Developing people: grew multiple engineers into
senior and management roles.
- Founder, repeatedly: product, infrastructure, and
launch.
Industry Experience
Independent
Consultant · AI-Native Software Delivery
Client engagements
| May 2026 - Present | Remote
Scope: designs the delivery process and governance model; holds
the product and prioritization seat.
- 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.
- Governance built into the system: every change passes an independent
reviewer, automated testing, supply-chain security scanning, and a
deployment verification step.
- Next.js, Vercel, Cloudflare stack: robust tooling
and feedback loops for strong agentic traction.
- 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)
Scope: technical direction and roadmap for a public benefit
corporation’s engineering team.
- Originated and co-architected HumaneBench.ai, an open-source AI
evaluation framework built on AISI Inspect.
- Fractional CTO to the team that built and maintains it, shaping
architecture, scoring design, multi-provider support, documentation, and
positioning.
- Designing and building a real-time evaluation classifier that scores
AI behavior against those standards inline at sub-100ms.
- Designing telemetry for operational visibility and evaluation
feedback loops.
- Curating the technical roadmap: production monitoring, multi-turn
evaluation, adoption maturity models.
Co-founder & Software
Engineer
Scope: co-founder; owned front-end and design delivery, including
outside design contractors.
- 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.
- Partnered with co-founders on product direction, roadmap, and
prioritization.
Infrastructure Engineer
Tobiko | Mar 2024 - Oct 2024
| Remote
Scope: cloud platform serving production customer
workloads.
- 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.
- Stood up a customer support and incident response workflow, and
onboarded staff and customers onto it.
Engineering
Manager / Principal Software Engineer
Mavenlink /
Kantata | Apr 2017 - Dec 2023 | San Francisco, CA
Scope: led two engineering teams for close to seven years,
including the shared infrastructure platform relied on by every
engineering team in the company. Partnered with product, security, and
application groups on standards adopted organization-wide.
- Internal Infrastructure Platform (4 yrs): Built a
new team from scratch whose product was the platform the entire
engineering org built on, and 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.
- Led the multi-year modernization of that platform from legacy
infrastructure to cloud-native: the whole Rails monolith and its service
ecosystem onto Kubernetes with Terraform and Ansible, the primary MySQL
database onto RDS, and HashiCorp Vault stood up as an internal secrets
service.
- Rebuilt the team after mass departures: inherited a one-person
DevOps team and 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.
- 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.
- 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.
Jack also strives to be at the forefront of new technology and assess
how he can leverage it. Newer tech like GenAI can be complex and
ever-evolving, and Jack is not one to back down but step up and embrace.
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.
Throughout our time together, Jack was caring and invested in helping me
set goals and develop my career. His mentorship was a key factor in
elevating myself from an incoming Junior Engineer to an Engineering
Manager. Jack has a great curiosity and a strong set of technical
capabilities that allow him to serve as a great example for others and a
key contributor to any team!”
— Wesley Morlock, Engineering Director, 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