Ion
Ion4d ago
New

Principal Full-Stack Developer, Budapest

HungaryHungary·BudapestFull-timelead
EngineeringFullstack Developer
0 views0 saves0 applied

Quick Summary

Overview

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.

Technical Tools
awsdockerreactsqlterraform
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. 
 
The Principal Full-Stack Developer will play a critical leadership role on a key project for a strategic Lab49 client. 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.
  • Partnering with our client to lead the design and build of a structured products trading UI using modern web 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. 
  • 10+ years of solid hands-on experience in software engineering
  • 5+ years of 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.
  • Why Lab49? 

    Lab49 is an established partner for most financial institutions on Wall Street. You will gain exposure into a variety of environments, business domains, technologies, and people. Your ability to bring drive and creativity to the role will be the key component to success at Lab49. The broad and intense exposure to a variety of challenges accelerates your career growth, and Lab49’s structure is designed to enable you to learn and grow as an engineer and consultant.   

     
    Lab49/ION is committed to maintaining a supportive and inclusive environment for people with diverse backgrounds and experiences. We respect the varied identities, abilities, cultures, and traditions of the individuals who comprise our organization and recognize the value that different backgrounds and points of view bring to our business. 
    Lab49/ION adheres to an equal employment opportunity policy that prohibits discriminatory practices or harassment against applicants or employees based on any legally impermissible factor.
     

    Location & Eligibility

    Where is the job
    Budapest, Hungary
    Hybrid — some on-site time required
    Who can apply
    HU

    Listing Details

    Posted
    May 18, 2026
    First seen
    May 18, 2026
    Last seen
    May 23, 2026

    Posting Health

    Days active
    1
    Repost count
    0
    Trust Level
    62%
    Scored at
    May 20, 2026

    Signal breakdown

    freshnesssource trustcontent trustemployer trust
    Ion
    Ion
    lever
    Employees
    5
    Founded
    2025
    View company profile
    Newsletter

    Stay ahead of the market

    Get the latest job openings, salary trends, and hiring insights delivered to your inbox every week.

    A
    B
    C
    D
    Join 12,000+ marketers

    No spam. Unsubscribe at any time.

    IonPrincipal Full-Stack Developer, Budapest