John Jayasankar

Work

What I shipped, and what it changed.

Production AI inside live operations. 0→1 infrastructure in rates, FX, and cross-currency. Then RideLens, Daylight, RailDrop, and Gridiron: independent products built end-to-end and shipped live. Filter by Agents, Markets, or Labs for the path that matches the role you are hiring for.

01/11 · Setup Agent

  1. JJ-SYS-01AgentsQuantile · LSEG · 2025

    Operations agent that collapsed a 3.5-hour bottleneck

    Lead Product Manager

    A production AI agent inside a live operations workflow, not a side chatbot. Bounded actions, operator visibility, and zero AI-initiated configuration errors in its first six months.

    3.5h  to 8msetup time3×run volume0AI config errors / 6 mo

    Read the case

    Before Gate After

  2. JJ-SYS-02AgentsQuantile · LSEG · 2025

    Incident agent that returned 750+ engineering hours a year

    Lead Product Manager

    When something broke in production, ops still paged senior engineers by default. The agent gathers domain evidence first, sharpens the diagnosis, and escalates only when the evidence is incomplete.

    4.5h  to 11minvestigation−78%escalations750+eng hours / year

    Read the case

    Incident Evidence Diagnose

  3. JJ-SYS-03MarketsQuantile · LSEG · 2024

    Multilateral compression for trillions in trapped notional

    Product Manager

    Banks held large cross-currency books that could only net in pairs. A central settlement path made network-wide offsets executable, so notional stuck in pairs became eligible to compress.

    +34%notional reduction / run18 banks12 currency pairs$X.XTeligible notional

    Read the case

    Gross Run Compressed Risk envelope

  4. JJ-SYS-04MarketsQuantile · LSEG · 2024

    Dual-source valuation that caught discrepancies 48 hours earlier

    Product Manager

    A late valuation mismatch can halt a multi-trillion compression cycle. An independent second source removed that single point of failure and moved failure upstream, while it was still cheap to fix.

    −91%resubmissions48hearlier detection$XT+cycle notional

    Read the case

    Split Diff Lock

  5. JJ-SYS-05MarketsQuantile · LSEG · 2024

    FX compression with margin intelligence in the optimizer

    Product Manager

    A mathematically good FX proposal still fails if margin or data disagree. Margin checks moved inside the optimizer, and four-source validation gated inputs before the live window.

    40+live runs100%proposal acceptance−94%live failures

    Read the case

    Book Gates Accept

  6. JJ-SYS-06AgentsQuantile · LSEG · 2025

    A reusable control plane for five enterprise agent systems

    Lead Product Manager

    One-off agent integrations do not scale. A shared control plane for context, typed actions, approval, and evals made the next agent a reuse problem, not a prototype from zero.

    5enterprise systemsMCP + APIsreusable interfacesHITL + evalsproduction controls

    Read the case

    Context Actions Services HITL Eval

  7. JJ-SYS-07MarketsOpenGamma · Trading Technologies · 2022 to 2023

    Pre-trade simulator that made capital a decision, not a surprise

    Product Analyst

    A simulation engine that showed the next trade’s capital cost across venues before the desk committed. Comparing incremental with standalone cost made portfolio offsets visible.

    0 to 1originated and shippedup to −30%initial margin20+enterprise clients

    Read the case

    Base + Trade Simulate Compare

  8. JJ-SYS-08LabsIndependent · Labs · 2026

    RideLens: every ride, one comparison

    Product, design, and build

    Live roads. Real rate cards. Uber, Lyft, Empower, and Curb ranked before you open four apps and guess.

    4providers, one board3ways to rank a tripHonestranges stay ranges

    Read the case

    Route Price Soonest Value

    Open RideLens (opens in a new tab)
  9. JJ-SYS-09LabsIndependent · Labs · 2026

    Daylight: your screen, through the day

    Product, design, and build

    Adaptive display lighting for macOS. Warmth and brightness on a schedule you set: gradual, offline, and honest about what it is doing and why.

    6layers, one fixed order3levels of certainty263tests, no dependencies

    Read the case

    Schedule Resolve Explain Confirm

    Open Daylight (opens in a new tab)
  10. JJ-SYS-10LabsIndependent · Labs · 2026

    RailDrop: know when your train gets cheaper

    Product, design, and build

    Book the trip. Watch every bookable Amtrak option across your window. One email when a listed fare actually drops. Never an invented price.

    ±1 daydefault watch window1 emailonly when it improves0invented prices

    Read the case

    Booked Watching Board Alert

    Open RailDrop (opens in a new tab)
  11. JJ-SYS-11LabsIndependent · Labs · 2026

    Gridiron: every game, every drive, one view

    Product, design, and build

    A live NFL and college football command center. Every game gets its own 3D field with the reported ball spot, beside the score, win probability, and odds from named sources.

    3sources, each named0guessed ball spots669unit and integration tests

    Read the case

    Slate Drive Odds Touchdown

    Open Gridiron (opens in a new tab)

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