Senior AI / Agent Systems Engineer
Architect deterministic multi-agent LangGraph workflows, custom hybrid vector RAG pipelines, and LLM guardrails for enterprise fintech and mission-critical client systems.
Base Compensation
$110k – $145k USD
Transparent, annualized global tier.
Work Arrangement
100% Remote
Async-first, any timezone worldwide.
Squad Density
100% Senior Eng
Zero junior overhead or hand-offs.
Hiring SLA
48-Hour Decision
Fast offer post-technical sprint.
Executive Overview & Mission
At GrowBig IT, we do not ship fragile prototype demos or shallow wrapper apps. We architect production-grade, stateful cognitive engines for international fintechs, defense contractors, and high-volume logistics systems.
As a Senior AI & Agent Systems Engineer, your mandate is to transition client systems from unpredictable single-prompt pipelines to deterministic Directed Acyclic Graph (DAG) state machines. You will build autonomous swarms capable of self-healing, deterministic tool invocation, verifiable citation graphs, and audited zero-leak execution.
Core Tech Stack & Autonomous Infrastructure
Technologies actively deployed in our current production client contracts:
- Python 3.12+ (Asyncio)
- LangGraph & LangChain Core
- FastAPI & Pydantic v2
- Pinecone Serverless & Qdrant
- Claude 3.5 Sonnet / Haiku
- OpenAI Structured Outputs
- Cohere Rerank v3 (BM25 Hybrid)
- Langfuse & OpenTelemetry
- Redis, Celery & Temporal
- Docker & AWS ECS / Fargate
What You Will Architect & Ship
Multi-Agent DAG State Graphs: Design, benchmark, and deploy non-linear agent swarms with state checkpoints, rollbacks, and deterministic routing via LangGraph.
Hybrid Vector & Lexical Retrieval: Build RAG pipelines integrating dense semantic embeddings (Pinecone/Qdrant) with sparse keyword queries (BM25) and neural reranking algorithms.
Deterministic Guardrails: Implement rigorous Pydantic schema validation layers and semantic output validators ensuring 99.8%+ schema compliance without JSON hallucinations.
Direct Enterprise CTO Interfacing: Engage directly in architecture calls with client engineering heads. No project managers rewriting your architectural decisions.
Telemetry & Cost Compression: Instrument granular step-level tracing via Langfuse to identify token bloat, optimize context caching, and cut inference costs by up to 40%.
What We Are Looking For
5+ years of software engineering experience in production environments using Python or high-scale TypeScript.
2+ years of production LLM engineering with agent architectures, vector indexing, context window optimization, and prompt evaluation harnesses.
Strong distributed fundamentals: Async I/O concurrency, resilient queuing (Redis/Temporal), transactional integrity, and containerization.
Radical async clarity: Crisp technical writing skills and an intrinsic allergy to non-essential meetings and corporate theatrics.
Demonstrated shipped systems: A public GitHub, open-source commits, technical papers, or deep architectural war stories to share.
Compensation & Sovereign Perks
Top-Tier Global USD Pay
$110,000 – $145,000 USD paid seamlessly through Wise, Deel, or direct global wire transfer.
$3,000 AI & Compute Stipend
Annual budget for OpenAI/Anthropic API research credits, GPU instances, and technical books/certifications.
Top-Spec Hardware Gear
Factory-fresh Apple MacBook Pro (M3 Max / M4 Pro, 64GB Unified RAM) + $2,000 home office workstation setup.
Annual Squad Retreats
28 days paid leave + premium health coverage + fully sponsored annual gatherings in destinations like Bali, Lisbon, and Dubai.
4-Step Zero-Fluff Hiring Process
No automated screening bots, no leetcode puzzles that bear no resemblance to real engineering.
- 1
Async Architecture & GitHub Review
We review your repository, PR history, or technical writing within 24 hours of submission.
- 2
Paid 2-Hour Practical Sprint ($200 USD Stipend)
A take-home architectural problem mirroring actual client edge cases. Compensated for your time.
- 3
45-Minute Deep-Dive with CTO Rafiqul Karim
Direct peer-to-peer code and systems review. Zero HR corporate fluff, strictly technical alignment.
- 4
Written Offer Within 48 Hours
Clear compensation, equity incentives, contract parameters, and rapid onboarding timeline.
Submit Direct Application
Direct review by CTO leadership within 24 hours. No recruiters, no keyword filters.
Active Squad Expansion
Other High-Velocity Openings
Principal Next.js & Full-Stack Architect
Lead high-concurrency builds in Next.js, TypeScript, and Postgres. Own architecture, edge caching, and design-system performance for flagship products.
Lead Autonomous Agent & RAG Engineer
Design hybrid semantic search (BM25 + dense vectors), cross-encoder rerankers, and evaluation harnesses for production agentic workflows.
Senior DevOps & Kubernetes SRE
Own 24/7 reliability for multi-tenant Docker, Traefik, Postgres, and Redis stacks. Automate zero-downtime releases and SOC 2 compliance infrastructure.