---
title: 'Senior Agentic Developer, LLM‑Native / Enterprise, NY at ION Group'
canonical: 'https://feeny.ai/job/senior-agentic-developer-llm-native-enterprise-ny-ion-group-new-york-crxpz1btskb3'
type: 'job'
last_seen: '2026-09-11'
---

# Senior Agentic Developer, LLM‑Native / Enterprise, NY at ION Group

- **Company:** ION Group
- **Location:** New York, NY
- **Compensation:** $220k–$240k
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-03-05
- **Last confirmed live:** 2026-09-11
- **Apply:** https://jobs.lever.co/ion/f7bf6c5b-b70e-44d9-92b7-d9593f8220e6

## Job description

Lab49 is a specialist strategy, design, and technology consulting company dedicated to the financial services industry. We were founded in 2002 to fill a need in the Financial Technology marketplace for high-end execution and reliable delivery of technology projects. Lab49 is now looking for a Senior Agentic Developer, an engineer who doesn’t just use AI tools but writes software through them. We are looking for bright, curious engineers who thrive on continuous learning, experimentation, and delivering tangible results for clients. This role is ideal for developers interested in evolving toward an FDE-style mindset, combining deep technical expertise, customer impact, and AI-native ways of working. This is not a role focused on “adding AI features” or “building AI platforms.” Instead, we are seeking an experienced developer who generates production-grade enterprise code using large language models as a primary interface, particularly while modernizing or extending complex, legacy systems in highly regulated environments. You will operate as a vibe coder in the best sense of the term: combining deep engineering intuition, strong system design instincts, and fluent command of LLMs to move faster than traditional development workflows, without compromising rigor, compliance, or reliability.

## What You’ll Do

- Continuously experiment with emerging AI tools, development techniques, and agentic workflows to accelerate delivery and improve client outcomes.
- Partner with clients to turn innovative AI capabilities into practical, production-ready solutions that create measurable business value.
- Generate, refactor, and extend enterprise-grade codebases by orchestrating LLMs as first-class development tools, not just assistants.
- Modernize and evolve legacy systems (often written in traditional enterprise stacks) using AI-driven development workflows.
- Apply “vibe coding” practices responsibly within highly regulated domains such as financial services, capital markets, or other compliance-heavy environments.
- Design and guide agentic workflows where LLMs reason, iterate, and produce code aligned with business and architectural constraints.
- Validate, test, and harden AI-generated code to meet production, security, and audit standards.
- Collaborate closely with product managers, architects, and clients to translate ambiguous requirements into working systems, fast.
- Influence how Lab49 and its clients adopt LLM-native software engineering practices at scale.

## What We’re Looking For

- Strong engineering fundamentals coupled with real-world experience solving difficult production problems ("battle scars") in enterprise systems
- A passion for continuous learning, experimentation, and achieving results with clients.
- Hands-on experience manufacturing production-grade software in an AI-assisted way at scale (not just autocomplete or chat usage, but sustained code production through prompts, agents, or workflows).
- Experience working within mature CI/CD environments, with automated testing fully integrated into the delivery pipeline.
- Comfort working in regulated, risk-aware environments, where correctness, explainability, and traceability matter.
- Ability to reason about system behavior, edge cases, and failure modes, even when the code is AI-generated.
- Fluency in at least one major enterprise language or ecosystem (e.g., Java, C#, Python, JVM-based stacks, etc.).
- Strong intuition for when to trust the model, and when not to.
- Leading teams through the AI adoption journey and helping enterprises build scalable, robust AI software factory frameworks.
- Interest in growing toward a Forward Deployed Engineering (FDE) style profile, combining technical excellence, customer engagement, and outcome-driven delivery.

## Nice to Have

- Experience designing or using agentic development workflows (multi‑step prompting, tool‑using agents, code‑generation loops)
- Exposure to modernization programs (monolith → services, legacy refactors, platform rewrites)
- Opinions about how software engineering should evolve in an LLM‑first world - and the ability to defend them

LAB49 consultants are experts in strategy, user experience, architecture, engineering, and delivery management. We combine knowledge of the latest trends in technology with deep domain expertise to deliver innovative solutions with accelerated time-to-market.

We have office hubs in Midtown Manhattan, Washington DC, London, Budapest, New Delhi and Sydney.

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.

## About ION Group

## Company Overview
- **One-liner**: ION Group delivers mission-critical trading, treasury, and workflow automation software to financial institutions, corporations, central banks, and governments.
- **Entity Type**: Private (privately held, with venture funding rounds)
- **Headquarters**: London, United Kingdom
- **Founded**: 1998 (per Crunchbase and LinkedIn) / 1999 (per Wikipedia)
- **Founders**: Andrea Pignataro

## Core Business
- **Primary industry**: Financial technology (trading & risk management, treasury, capital markets software)
- **Target customers**: B2B – banks, asset managers, hedge funds, central banks, corporates, and governments
- **Mission/purpose**: “We help our customers do more, faster and better than before” by combining automation with a strategic view of the industries they serve.

## Products & Services
(Source: [crunchbase.com](https://www.crunchbase.com/organization/ion-group))
- **Openlink**: Treasury and risk management platform for commodity-intensive organizations (real-time cash management, FX, derivatives trading).
- **City Financials**: Pre-configured treasury and risk management solution for multinational corporations.
- **Treasura**: SaaS-based treasury management system for advanced cash management.
- **Reval TS**: Liquidity management system for banks (cash concentration, visibility, interest calculations).
- **ETRM/CTRM Solutions**: Energy and commodity trading and risk management solutions.
- **XTP Execution**: Integrated cleared derivatives trading solution (order management, execution, connectivity).
- **Fidessa, Dealogic, Acuris, Allegro**: Acquired platforms covering equities, derivatives, M&A data, and capital markets analytics.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metrics**:
  - **Annual Revenue**: $3.3B (per LinkedIn – source: [linkedin.com](https://linkedin.com/company/iongroup))
  - **Total Funding**: $400M (venture round in May 2016) + €35M (venture round in June 2004) – source: [linkedin.com](https://linkedin.com/company/iongroup)
- **Notable Investors/Partners**: No lead investors explicitly named; early rounds from undisclosed sources. Key partners include financial institutions using its platforms.
- **Growth Signals**:
  - Headcount: 2,944 (LinkedIn, +1.7% YoY) vs. 13,000+ (careers page – discrepancy likely due to different reporting methods).
  - Major acquisitions: Dash Financial Technologies (2021), Clarus Financial Technology (2021), Broadway Technology (2020), Acuris ($1.8B, 2019), Prelios S.p.A. ($1.5B, 2023), Fidessa (£1.5B, 2018), Allegro (2019), Dealogic (2017).
  - Never sold a business since founding (Wikipedia).
  - Operates in 18+ countries, 84 offices globally.

## Competitive Advantages
- **Breadth of mission-critical software**: Covers the full trade lifecycle (pre-trade, execution, risk, treasury, post-trade) for multiple asset classes.
- **Acquisition-driven expansion**: Absorbed market leaders in different niche verticals, creating a unified platform with deep domain expertise.
- **Long-term ownership mentality**: Founder Andrea Pignataro has never sold a business, signaling stability and commitment.
- **High switching costs**: Clients rely on ION for core financial operations; replacing systems is extremely difficult.
- **Global scale**: 13,000+ employees, 84 offices, presence in 46 countries (LinkedIn breakdown).

## Strategic Focus
- **Automation & AI**: Investing heavily in research and development to “shape the future of automation” (company website).
- **Expansion into asset management**: Acquisition of Prelios (2023) and Clarus (2021) signals push into real estate and derivatives analytics.
- **Graduate development programs**: Launching programs in Pisa, Trento, and other locations to build talent pipeline.
- **Resilience after ransomware attack**: In Feb 2023, LockBit ransomware hit ION’s derivatives platform; clients faced disruptions but systems were restored within weeks. The company continues to focus on security and compliance.

## Why Work Here
- **Culture**: Described as “visionary innovators” with a “positive culture of continuous improvement.” Emphasis on community and collaboration.
- **Remote/Hybrid**: Some roles are hybrid (e.g., Milan-based positions); many are office-based depending on location. The careers page lists full-time and hybrid options.
- **Notable perks**: Graduate development programs, global mobility across 84 offices, exposure to mission-critical financial systems.
- **Engineering culture**: Large technical team (1,060+ in technical roles), with focus on React, DevOps, cloud engineering, and AI. Recent open positions include Senior Web UI Developer, iOS Engineer, and AI Engineer.
- **Growth trajectory**: Rapid scaling through acquisitions and organic hiring; opportunities to work on cutting-edge fintech products.
- **Diverse locations**: Offices in London, New York, Noida, Budapest, Chisinau, Milan, Mexico City, and more.

## Sources
1. [linkedin.com](https://linkedin.com/company/iongroup) – Employee count, revenue, funding, acquisitions, workforce breakdown
2. [en.wikipedia.org](https://en.wikipedia.org/wiki/Ion_Group) – Founding, founders, acquisition history, ransomware attack
3. [crunchbase.com](https://www.crunchbase.com/organization/ion-group) – Products, funding, overview
4. [iongroup.com](https://iongroup.com/careers/) – Careers page, open positions, company values
5. [jobs.lever.co](https://jobs.lever.co/ion) – Current job listings

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