Senior Full-Stack & Backend Engineer (Boston, MA / Remote)

Engineering high-throughput backends & production AI SaaS

I am a Senior Software Engineer with 7+ years of production ownership bridging enterprise distributed systems (6 years scaling Java, Spring Boot, AWS Kinesis/SQS, Kubernetes, and React.js for millions of users at Jobcase) with 0-to-1 full-stack velocity shipping multi-tenant Voice AI, FinTech, and Legal SaaS platforms in Python (FastAPI, SQLAlchemy, AsyncIO), TypeScript (Next.js 15, React 19), and PostgreSQL.

Download 1-Page Resume (PDF) LinkedIn Profile taieddie8@gmail.com

7+ Years

Continuous production full-stack & backend engineering (Oct 2019 - Present)

Millions of Users

Event-driven messaging & compliance microservices on AWS Kinesis, SQS & K8s

4 Flagship SaaS Apps

Live multi-tenant Voice AI, Stripe Billing & Legal AI apps on FastAPI & Next.js 15

Sub-500ms Voice & AIMD

Real-time Telnyx WebSocket voice pipelines & closed-loop AIMD email rate governor

Tier 1 Production Systems

Flagship Full-Stack SaaS Platforms

Customer-facing SaaS applications architected end-to-end with Python (FastAPI), TypeScript (Next.js 15 / React 19), PostgreSQL, Stripe Connect, and real-time telephony webhooks.

FrontDeskAnswer

frontdeskanswer.com ↗

24/7 AI Phone Receptionist, Emergency Triage & Two-Way SMS Dispatch SaaS for Trade Contractors and Restaurants.

Hard Engineering Problem Solved Low-latency bi-directional PSTN audio streaming over Telnyx WebSockets with deterministic turn-taking state machines, acoustic barge-in protection, and live two-way SMS relay between callers and on-call technicians.

Real-Time Telephony Pipeline: Handles concurrent inbound calls with trade-specific personas, structured slot capture, and instant SMS lead summaries within 5 seconds of call completion.
Zero-Telemetry Verification Gate: Automated Playwright mobile/desktop visual auditor and voice synthesis dry-run gate prior to production releases.

RenewalRescue

renewalrescue.com ↗

Automated Stripe Failed-Payment Recovery, Smart Retry Scheduling & Subscription Dunning SaaS.

Hard Engineering Problem Solved Idempotent Stripe webhook ingestion with replay deduplication, separated API + background worker topology on Railway, and zero-duplicate customer dunning guarantees under concurrent invoice events.

Event-Driven Recovery Engine: Listens to Stripe payment failure webhooks, classifies decline codes, and schedules custom retry windows paired with branded update-card flows.
Production Observability: Monitored continuously via New Relic NRQL p95/p99 latency alerts and Cloudflare Edge 5xx telemetry.

EasyPayRequest

easypayrequest.com ↗

B2B Invoice Generation, Stripe Payment Request Links & Automated Follow-Up SaaS.

Hard Engineering Problem Solved Synchronized server-side PDF invoice rendering, deterministic Stripe processing-fee recovery math, recurring billing schedules, and real-time immutable audit timelines across terminal record states.

One-Click Stripe Checkout: Combines downloadable PDF invoices with hosted Stripe payment links and automated overdue reminder sequences.
Full-Stack Contract Discipline: End-to-end Vitest, Pytest, and Playwright regression suites validating line-item math and state transitions.

CaseMind

casemind.app ↗

AI-Powered Legal Document Intelligence, Chronology Extraction & Clio Practice Integration.

Hard Engineering Problem Solved Multi-document PDF ingestion and chunked LLM extraction pipeline producing schema-validated legal summaries, risk flags, and actionable next steps synchronized with Clio matters.

Structured Legal Workflows: Transforms lengthy contracts and filings into executive summaries, chronological timelines, and follow-up checklists.
Clio OAuth Integration: Connects directly with legal practice management workflows for seamless document import.

Backend & Infrastructure Architecture

Multi-Agent Orchestration, AIMD Deliverability & Observability Engine

Underneath my customer-facing SaaS products runs a unified Python, FastAPI, SQLAlchemy, and PostgreSQL control plane engineered for deterministic concurrency, automated rate governance, and multi-cloud self-healing.

1. Advisory-Locked Multi-Agent Scheduler

PostgreSQL-backed workflow engine managing 35+ autonomous background workflows with cron/window scheduling, PostgreSQL advisory locks preventing split-brain execution, per-team budget ledgers, and a real-time React/TypeScript operator console.

2. TCP-Style AIMD Deliverability Governor

Closed-loop outbound email controller across 20+ sending domains (SMTP/IMAP, Gmail OAuth, Resend). Combines pre-send cross-provider seed canary probes (INBOX vs. SPAM) with Additive-Increase (+5/day) / Multiplicative-Decrease (0.5x) rate limiting and bounce circuit breakers.

3. Multi-Cloud Observability & Browser Gate

Automated telemetry monitor polling New Relic NRQL (p95/p99 latency, error rates), Cloudflare Edge GraphQL (5xx ratios), and Railway container logs, paired with headless Playwright + CDP desktop (1440x900) and mobile (390x844) layout verifiers.

System Topology & Closed-Loop Governance Trace

Stage 01 · Edge & Ingest

Cloudflare Edge → Next.js 15 & FastAPI

Terminates TLS, routes SSR traffic, and validates signed Stripe Connect, Telnyx Voice/SMS, and OAuth webhook payloads with idempotent replay guards.

Stage 02 · State & Concurrency

PostgreSQL Advisory-Locked Control Plane

Coordinates 35+ scheduled workflows, real-time STT voice turn state machines (<500ms latency), and separated Railway background worker queues.

Stage 03 · Closed-Loop Governance

AIMD Governor & Multi-Cloud Telemetry

Executes pre-send IMAP/Gmail seed canaries, dynamically scales per-mailbox caps (+5/day ramp, 0.5x backoff), and enforces New Relic NRQL p95/p99 gates.

Engineering & Compliance Toolkit

Specialized FinTech Workpapers, Field-Ops Cockpits & macOS Utilities

Alongside my core SaaS platforms, I build deterministic tax/compliance calculators, field-engineering closeout packet builders, and offline macOS utilities. Filter by category below to inspect live deployments.

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Career Trajectory

7+ Years of Production Software Engineering

Continuous full-stack and backend ownership across high-scale consumer social/messaging systems and multi-tenant SaaS products.

Senior Full-Stack Software Engineer | Independent & Freelance

August 2025 - Present | Boston, MA

Enterprise Client Delivery: Delivered a 10-milestone production web platform rebuild, interactive ROI calculator suite, and full-stack client portal for a US enterprise recruiting firm.
AI Voice & SMS Dispatch SaaS (frontdeskanswer.com): Architected and operated a 24/7 AI phone receptionist and two-way SMS dispatch platform using Python, FastAPI, Next.js 15 (React 19, TypeScript), and PostgreSQL over Telnyx WebSockets.
Multi-Agent Workflow & AIMD Deliverability Platform: Built an advisory-locked PostgreSQL + FastAPI execution engine running 35+ autonomous workflows, a React operator console, and a closed-loop AIMD email rate governor across 20+ sending domains.
FinTech Billing & Document AI SaaS (renewalrescue.com, easypayrequest.com, casemind.app): Shipped full-stack SaaS platforms with Stripe Connect/Webhooks, Railway background workers, PDF generation, and OpenAI legal chronology pipelines.

Senior Software Engineer | Jobcase, Inc

August 2021 - August 2025 | Cambridge, MA

Designed, developed, and maintained resilient backend communication and messaging microservices using Java, Spring Boot, and SQL supporting millions of active users.
Built and operated event-driven stream and queue processing pipelines on AWS Kinesis, AWS SQS, Docker, and Kubernetes.
Integrated OpenAI / LLM APIs into communication template workflows and built internal experimentation tooling to evaluate message variants via live click-through signals.
Led post-acquisition architectural consolidation of two compliance and suppression systems into a single authoritative service; tuned production observability in New Relic, Datadog, and Sumo Logic and optimized Amazon Redshift ETL pipelines.

Software Engineer | Jobcase, Inc

October 2019 - August 2021 | Cambridge, MA

Developed and iterated on the core For You feed experience using React.js, shipping responsive user-facing improvements on a high-traffic consumer product surface.
Implemented and evaluated full-stack UI/content A/B experiments based on engagement and click-through metrics.

Bachelor of Science in Computer Science | Brandeis University

Waltham, MA | 2015

Core Technical Stack: Python (FastAPI, SQLAlchemy, Pydantic, AsyncIO, Pytest), TypeScript, React.js, Next.js, Java (Spring Boot, Spring MVC), PostgreSQL, MySQL, Amazon Redshift, AWS (Kinesis, SQS, S3, Elastic Beanstalk), Docker, Kubernetes, Datadog, New Relic, Sumo Logic, Playwright.