Principal Full Stack Developer, New York
Hybrid New York Full-time Senior Full-stack Engineering
At a glance
Senior Full-stack Engineering role at ION Group. New York · full-time · $180,000–$230,000 base.
SalaryStated by ION Group
$180,000 – $230,000
Base salary for this role, in USD per year, as published in the posting.
This role, from ION GroupOur estimate for the market: $180,625–$227,663Median $205,000
The range includes the market median of $205,000 for senior full-stack engineering roles in New York.
Worked out from 66 postings that stated pay, median $205,000. Last updated Oct 22, 2026.
RoleFull-stack Engineering
SenioritySenior
LocationNew York
WorkplaceHybrid
EmploymentFull-time
Base pay$180,000–$230,000
PostedFeb 3, 2026 · 8mo ago
Role brief
techroles summary, based on the employer's posting.
What you'll do
- Lead the design and development of a structured-products trading platform with the client
- Plan, document and guide software delivery through to production
- Stay hands-on as an engineer and architect while directing project work
- Coordinate engineering outputs and key contributors, working across teams toward project results
- Advise client stakeholders and build relationships that can support continued work
What you bring
- At least ten years of practical development work with Python or C#
- You have built with React and current approaches to managing front-end state
- You have designed AWS systems using Terraform and Docker, and understand SQL and data persistence at scale
- You hold a computer science bachelor's degree or have equivalent experience
Who this fits
This senior, client-facing role suits a hands-on technical leader who can guide engineers and advise clients. You should be comfortable working in large financial organizations and bring strong knowledge of financial markets and products. The position is hybrid in New York.
From the employer
Lab49 is an award-winning specialist consultancy that creates bespoke technology in partnership with the most important companies in finance. We were founded in 2002 to bring Silicon Valley solutions to Wall Street’s door. Since then, we have worked on successive waves of technological change, including distributed computing, high-speed automation, enterprise UX and digital distribution (for which Lab49 was among the first significant practices established on Wall Street), DevOps, cloud and data science.
Today, we are an established partner in financial markets, having delivered hundreds of projects for clients including all the world’s tier-one investment banks and many of the largest buy-side firms globally.
Being part of Lab49 means bringing your drive and creativity into an environment where your contributions will make immediate impact. Engineers will work in cross functional teams, consulting directly with our clients, shaping not only technical solutions to business problems but delivering them into production.
Currently LAB49 is looking for a Principal Full-Stack Developer will play a critical leadership role on a key project for a strategic Lab49 client - a global asset management powerhouse. Working in a collaborative cross functional project team, with direct client-facing interactions, you will have an opportunity to lead a team of engineers and build modern digital products.
What you’ll be doing:
- Partnering with our client to lead the design and build of a structured products trading platform using modern development technology and techniques. You will be responsible for managing engineering deliverables, and the relationships with other key contributors to deliver great software.
- Design, document, and plan for the technical implementation and delivery of working software into production.
- Act as a hands-on engineer and architect to support ongoing project work. Lead and actively participate in projects, serving as a role model for project teams and collaborating with other practices to ensure successful outcomes.
- Partner with client counterparts and stakeholders to maintain and build relationships, maintaining a commercial approach. Develop strong relationships with clients as a strategic partner and technical advisor, contributing to expanding our footprint and securing follow-on work.
What you should have:
- 10+ years of solid hands-on experience with Python or C# development.
- Hands-on experience with React and modern front-end state management.
- Extensive experience architecting solutions on AWS, including Terraform and Docker.
- Proven track record operating effectively inside large, complex organizations (e.g., Tier-1 Investment Banks or Global Asset Managers).
- Deep understanding of SQL and data persistence strategies at scale.
- BS in Computer Science or equivalent experience.
- Expert-level knowledge of, and strong demonstrated interest in, global financial markets and financial products.