Salesfinity is redefining how revenue teams prospect, call, and convert pipeline.
Our AI Parallel Dialer enables reps to initiate multiple outbound calls at once, auto-filter voicemails, and prioritize live connects—delivering 5.2× more conversations per rep per day.
We’re scaling fast, with real customers, real revenue, and product-led momentum. And we're just getting started.
Join a small, sharp engineering team that ships weekly, solves hard real-time challenges, and builds tech that directly drives ARR.
What You’ll Do
Own product — not tickets. You will:
- Build new AI-powered modules end-to-end across our TypeScript/NestJS backend & AWS serverless stack
- Scale real-time calling infrastructure processing thousands of concurrent dials, conversations, and events
- Architect & optimize event-driven pipelines (BullMQ, SQS/SNS, WebSockets, Deepgram/AI integrations)
- Own observability — logs, metrics, alerts, performance tuning, auto-healing mechanisms
- Improve deployment + runtime safety with CI/CD automation, IaC, and zero-downtime rollouts
- Collaborate directly with founders + users to turn raw GTM insights into shippable products
- Raise the bar via code reviews, pairing, and helping us build a world-class engineering culture
You’ll have huge scope and direct business impact. If you love autonomy × accountability, you’ll thrive here.
Tech Stack
- Languages: TypeScript
- Framework: NestJS (modular monolith evolving into microservices)
- Infra: AWS (Lambda, ECS/Fargate), Terraform, CloudWatch, S3, CloudFront
- Data: MongoDB, Redis
- Queues / Events: SQS/SNS, BullMQ, WebSockets
- Integrations: Twilio Voice, Deepgram ASR, HubSpot/Salesforce APIs
We also lean heavily on LLM orchestration and real-time telephony workloads — a playground for builders who like tough engineering problems.
Must-Have Experience
- 3+ years building and operating production backends
- Strong expertise in TypeScript and modern Node/NestJS patterns
- Proven ability to architect and run cloud-native workloads (AWS preferred)
- CI/CD, testing rigor, and “you build it, you run it” mindset
- Real-time or high-throughput system design experience (queues, event streams)
- Clear communicator — able to explain tradeoffs and drive alignment quickly
- Startup/ownership DNA — willing to jump into ambiguity and deliver clarity
Bonus Points
- Telephony or real-time communication (WebRTC, SIP, Twilio)
- AI/ML or speech-to-text utilization in production
- High-scale MongoDB optimization (sharding, indexing strategies)
- Experience in calling, VOIP, or GTM tech stacks
- Prior 0→1 product experience where you shipped iconic features with tiny teams
What Success Looks Like (12 Months)
✅ You’ve owned and shipped multiple customer-loved features
✅ Our dialing infrastructure is measurably faster, safer & more observable
✅ Engineering velocity is up; incidents & toil are down
✅ You’re a “glue person” — trusted by engineers, product, GTM, and customers
✅ You feel real ownership and see yourself shaping the next 5 years of Salesfinity
Compensation & Benefits
- Competitive salary + early-stage equity
- Health benefits
- Annual learning & growth budget
- Company offsites and a culture of candor + kindness + bias-for-action
