JAMESCHRISTIANLISINGBuilding AI-powered systems that eliminate repetitive work, automate revenue operations, and help businesses scale
AI Automation EngineerGTM SystemsRevenue OperationsCRM AutomationInternal Business AppsView Case Studies →Let's Build SomethingLinkedIn →GitHub →
Services
AI & Workflow Automation
I design and build end-to-end automation systems — CRM pipelines, lead routing, sales workflows — that eliminate repetitive work and connect your entire tech stack, so your team spends time on what actually matters.
AI Internal Tools & Applications
I build custom AI-powered internal tools, dashboards, and business applications using the Claude API — from intelligent workflows to autonomous agents that execute real business tasks.
Email & Revenue Infrastructure
I set up, warm, and optimize cold email infrastructure — domains, DNS, sending systems — so your revenue engine lands in the primary inbox and generates consistent pipeline at scale.
THE ONLY
ENGINEER
IN THE ROOM
Businesses waste hours on repetitive work. Manual workflows don't scale, and disconnected systems create bottlenecks that quietly drain revenue. I build AI-powered systems that connect your tools, automate operations, and get that time back.
At Lead Assassin — a B2B outreach agency — I was the sole backend engineer. While most specialists pick a lane, our operation demanded mastery across three: the automation systems that moved data at scale, the AI tools that personalized at volume, and the email infrastructure that made sure everything actually landed.
That forced overlap is rare. You can't fully automate without understanding deliverability. You can't build useful AI tools without understanding what the sales team actually needs. Being the only engineer meant every broken system was my problem — and that's exactly how I got good at all three.
“When you're the only engineer, every broken system is your problem. So you learn everything.”
— James Christian LisingTools I Work
With Daily
45 tools across AI, development, automation, CRM, and email infrastructure
and more tools added as projects demand
Real deliverability numbers from campaigns I've built and optimized. Inbox placement, reply rates, and volume at scale.
B2B SaaS Outreach Campaign
Instantly + ZapMail
The client's cold email sends were landing in spam, tanking reply rates before the message ever had a chance to be seen.
Achieved 91% inbox placement across 15,000 sends in 30 days using multi-domain rotation and ZapMail warm-up infrastructure.
Cold Outreach Sequence
Smartlead + Apollo
Generic outreach sequences were getting ignored — low open rates meant the message never had a chance to land with the right person.
Generated 120+ qualified replies from a 4-step sequence. Optimized subject lines and send windows using Smartlead A/B testing.
Domain Warm-Up & Rebuild
Mission Inbox + Instantly
A client's sending domain had been flagged as spam, killing deliverability and putting their entire outbound channel at risk.
Rescued a client domain flagged as spam. Rebuilt sender reputation over 3 weeks using Mission Inbox warm-up pools.
Multi-Domain Infrastructure
HeyReach + Instantly
High-volume outreach on a single domain was hitting sending limits and reputation risk, capping how much pipeline the team could generate.
Built and managed a multi-domain sending setup for high-volume outreach — consistent deliverability across 8 sending domains.
What Businesses
Gain
Reduce Repetitive Work
Free your team from manual tasks that eat hours every week.
Scale Operations
Systems that handle 10x the volume without 10x the headcount.
Improve CRM Efficiency
Clean pipelines and automatic updates — no more stale data.
Improve Deliverability
Cold email that actually reaches the inbox, not the spam folder.
Connect Disconnected Systems
Your tools finally talk to each other, automatically.
Build Internal Software
Custom tools and dashboards built for exactly how your team works.
Automate AI Workflows
AI agents that execute real tasks, not just answer questions.
Battle-Tested in a Live Agency
Every system here was built and refined inside a real, high-volume outreach agency — not a sandbox.
One Engineer, Full-Stack Ownership
Skip the hand-offs between automation, AI, and email specialists — one person owns the whole system.
Certified
Expertise
Validated by the platforms I work with every day. These certifications represent hands-on expertise, not just theoretical knowledge.
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Simple
Process
Discovery Call
We scope your bottleneck and goals.
Proposal & Quote
Fixed price, clear deliverables, no surprises.
Build & Handoff
I build, test, and hand over a working system with documentation.
LET'S BUILD
SOMETHING
Got an operational bottleneck slowing your team down? Let's build the system that solves it.
