Senior Full Stack JS Engineer

Posted 7 Days Ago
Be an Early Applicant
5 Locations
Remote
Senior level
Artificial Intelligence • Marketing Tech • Mobile • Software • Design • App development
The Role
As a Senior Full Stack JS Engineer, you'll enhance features, integrate services, and ensure compliance on a financial platform using Node.js, Python, and React.
Summary Generated by Built In
Why Join Us?

🔹 100% remote | 🌎 Global team | ⏳ Full-time
Join a stable, long-term project that's been in continuous development for 5+ years. The project offers consistent, meaningful work on a mature financial services platform.
Project overview:
It is a comprehensive financial services platform built for an established insurance and financial services company. The platform handles:

- Insurance products (motor, life, property, major medical)

- Loan management (vehicle, personal, mortgage, commercial)

- Investment and annuity products

- Digital client services and employee benefits

- Real-time financial transactions and reporting

- AI document processing

This is a production system processing real transactions for real customers, with established business processes and regulatory compliance requirements.

Why This Position is Different?

Stable, Long-term Project: Same project for 5+ years, deep domain expertise

✅ Mature Codebase: Well-structured, documented, with established patterns

✅ Real Business Impact: Your code affects real financial transactions and client services

✅ Technical Variety: Polyglot architecture (Node.js + Python/Django), multiple services

✅ Professional Growth: Become an expert in financial services technology
What You'll Do:

Work on a mature financial platform with real business requirements:

- Maintain and enhance banking/lending features, payment processing, and compliance workflows

- Work across our polyglot microservices architecture (Node.js/TypeScript and Python/Django)

- Implement complex business logic for insurance products, loan origination, and investment services

- Build real-time data processing systems using WebSockets and event-driven patterns

- Integrate with third-party services (DocuSign, payment gateways, banking APIs)

- Full-stack development from REST APIs to React frontends

- Ensure transaction integrity and regulatory compliance

- Collaborate with a stable team that knows the domain deeply


Requirements

Technical Requirements:

- 5+ years Full Stack development with both Node.js/TypeScript AND Python/Django

- Strong React.js, Redux, and modern frontend development

- PostgreSQL expertise including complex queries, transactions, migrations

- Experience with both Knex/Objection.js (Node) and Django ORM

- Microservices architecture experience

- Real-time systems (WebSockets, Socket.io, Celery)

- AWS and Docker experience

- RESTful API design with JWT/OAuth authentication

- Testing frameworks (Jest for Node.js, pytest for Python)

- Financial or insurance systems experience is a plus

- Strong English communication (B2-C1)

- Overlap with Eastern USA timezone for meetings

Tech Stack

Backend:

- Node.js/TypeScript: Koa.js, Objection.js, Knex.js

- Python: Django 4.2+, Django REST Framework, Celery

- PostgreSQL, Redis

Frontend:

- React, Redux, Material-UI

- TypeScript, Vite

- Formik, Yup validation

Infrastructure:

- AWS (S3, EC2, RDS)

- Docker, PM2, Gunicorn

- Socket.io, WebSockets

- DocuSign, Payment APIs

- Jest, Supertest, pytest

- Swagger/OpenAPI


Benefits

What We Offer

- Long-term stable position on established project

- 20 days PTO (25 after 3 years)

- 10 sick days, national holidays, 2 company days

- Well-being budget

- Maternity/paternity leave

- Professional development reimbursement

- Hardware as needed

- Stable, professional team environment

Process

Quick and efficient: HR screening → Technical discussion → Practical coding session → Offer

Apply now for a stable, long-term position on an established financial services platform.

Top Skills

AWS
Django
Docker
Jest
Node.js
Postgres
Pytest
Python
React
Redux
Typescript
Websockets
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The Company
HQ: Danvers, Massachusetts
52 Employees
Year Founded: 2012

What We Do

Headquartered in Boston, NineTwoThree partners with established brands and fast-growing startups looking to seize new business opportunities with the clever use of technology. As a product, engineering, design and marketing studio we work to understand your business, unique value proposition and the specific pain points you solve for your users.

Our team relentlessly pioneers AI, Web and Mobile solutions to create a competitive advantage for our clients.

Since founding the company in 2012 we have worked around the clock to established a track record of reliably creating value and delivering results for our partners and shareholders.

With an operating motto of “better software, faster”, the NineTwoThree team has received numerous industry recognitions, including:

***Awards***
• 2024 Top 50 AI firms, alongside the consulting of Microsoft, NVIDIA and IBM.
• Top AI agency,
• Top Chatbot Agency,
• #1 AI Agency in the US,
• #3 Machine Learning Agency
• #1 Boston AI Consulting Agency
• Inc 5000 4 Years In A Row
*Top 10 most promising IoT companies by CIO Review

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