Founding Engineer (Fullstack)

Wisemonk; Hyderabad; On-site; INR 8,970,000 - 14,095,000; Full time

Job summary

Wisemonk is hiring in London for an early engineering hire to help build an AI-powered SaaS platform for financial services. You will own features end-to-end, spanning backend APIs, data pipelines, and AI-driven capabilities, collaborating closely with the founder to shape product and engineering culture.

The role emphasizes production-grade Django/ FastAPI APIs, data models, ETL workflows, and AI integration using modern tooling.

Qualifications

• 3+ years of professional software engineering experience.
• Strong proficiency in Python with Django/FastAPI and production REST APIs.
• Experience with relational databases (PostgreSQL) and schema design.
• Familiarity with Git workflows, code review, and CI/CD practices.
• Ability to learn new domains quickly and own features end-to-end.

Responsibilities

• Develop and maintain production-grade Django/ FastAPI backends and REST APIs.
• Design data models and implement reconciliation workflows with ETL processes.
• Build AI-powered features and data pipelines, including integration with LLMs.
• Create data processing pipelines using Polars/Pandas at scale.
• Collaborate across backend, frontend, and AI components; own features end-to-end.
• Write tests and ensure high-quality code in a fast-moving startup.

Skills

Python

Django

FastAPI

PostgreSQL

Git workflows

CI/CD

Learning quickly

Team collaboration

Tools

Docker

AWS

Celery

Redis

Polars

Pandas

LangChain

LangGraph

Apache Arrow

Radix UI

TailwindCSS

Job description

We are hiring for a London-based FinTech startup that is building agentic AI solutions for financial services operations. The company is transforming how financial institutions manage data operations by automating the entire lifecycle from data ingestion and transformation to intelligent matching, break detection, and resolution eliminating manual spreadsheet-driven workflows.

As one of the early engineering hires, you'll work closely with the technical founder, contribute to a production-grade AI-powered SaaS platform, and have the opportunity to own features end-to-end while helping shape the product and engineering culture from the ground up.

The Role

You will work across the full stack of a production SaaS platform — backend APIs, frontend UI,

data pipelines, and AI-powered features — to build, extend, and ship product capabilities to

financial institution clients. This is a high-ownership role where you will design and implement

features end-to-end, not just pick up tickets.

What You'll Work On

Backend Development — Build and extend Django REST APIs, design data models,

and implement business logic for reconciliation workflows (ETL pipelines, matching

with TypeScript — data tables, configuration editors, dashboards, and real-time status

views

AI/LLM Integration — Build and improve AI-powered features including intelligent

document extraction, AI-assisted matching rules, conversational configuration agents,

and automated break analysis

Data Processing — Work with high-performance data processing pipelines using

Polars/Pandas for financial data transformation/reconciliation at scale.

Asynchronous Workflows — Design and implement distributed task workflows using

Celery for ETL orchestration, matching execution, and report generation

Testing & Quality — Write comprehensive tests (pytest, Vitest, Playwright) and maintain

high code quality in a fast-moving codebase

Production Support — Debug and resolve production issues alongside the founder;

What We're Looking For

Must Have

• 3+ years of professional software engineering experience
• Strong proficiency in Python (Django AND FastAPI), with experience building production REST APIs
• Experience with relational databases (PostgreSQL preferred) — schema design, query
• Familiarity with Git workflows, code review, and CI/CD practices.
• Ability to learn new domains quickly — you don't need FinTech experience, but you

need the curiosity to understand reconciliation workflows deeply.

• Strong problem-solving skills and comfort working independently in a startup

Great to Have

• Experience with LLM/AI integration in production applications (prompt engineering, API

orchestration, LangChain/LangGraph)

• Experience with data processing at scale (Polars, Pandas, Apache Arrow)
• Knowledge of asynchronous task queues (Celery, Redis)
• Familiarity with AWS services (ECS, S3, RDS, CloudWatch)
• Experience with Docker and containerised development/deployment
• Exposure to FinTech, capital markets, or financial operations (reconciliation,

settlements, NAV, cash management)

• Experience with document parsing/extraction (PDF, Excel, SWIFT messages)
• Familiarity with component libraries (Radix UI, shadcn/ui, TailwindCSS)

Why Join our team

• Founding team member — Shape the engineering culture and technical direction from

day one

• High ownership — You will own entire features end-to-end, from database schema to

pixel-perfect UI. Your code ships to production the same week

• Work with cutting-edge AI — Production LLM workloads, agentic AI, and intelligent

document extraction — not just buzzwords on a slide deck

• Direct founder access — Work alongside the technical founder who built the platform;

no layers of middle management

• Real impact — Financial institutions are running their daily operations on what you

build. Your work matters on day one

• Growth trajectory — Early hires at funded startups define their own career paths as the