Mehedi Ahmed

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Mehedi Ahmed

Senior Unity engineer in New York,
open to full-time roles and contract work.

I build the systems under VR, AR and games: rendering, NPC AI, physics, networking and the editor tools a team works in. Shipping since 2017; now co-founder and lead engineer at Liminal Games Studio.

Email me Résumé (PDF)
Leave No Witnesses A first-person stealth-action game for PC, in development at Liminal Games Studio. From the current build. What I built
  • A club floor lit pink and blue. A guard stands between a stage pole and the booths, with the bar and two neon signs behind.
  • A street at night, seen past a parked car. Across the road, a red light falls on the club: a pink neon sign over a red awning, and red ropes at the door. Office windows glow in the tower behind.
  • First-person view down a dark street at night, pistol in hand. Across the road, a neon flamingo sign and a red awning mark the club entrance, with red ropes out front.
  • The club entrance, a narrow brick passage lined with marquee bulbs. Red ropes run down both sides of a striped carpet into the dark room beyond.
  • First-person view aiming a pistol down a narrow dressing room. Mirror bulbs line the right wall, and the target stands at the far end, just above the sights.
  • A long alley at night in blue light, with a fence and a dumpster on the left. An orange lamp glows over a door far down the left wall, and red light spills across the road on the right.
  • A dark alley at night. A guard steps out of an open back door into the only pool of light, a red lamp on a brick wall.

Work

Liminal Games Studio

Co-founder and lead engineer

2025–now PC, iPhone, iPad, Android

An independent studio making low-poly games.

Leave No Witnesses

A first-person stealth-action game for PC, in development. Guards hunt you by sight and sound, and anything you leave behind can give you away.

What I built:

  • A custom URP renderer for the pixel-art look. It captures the scene into small cubemaps, keeps only the visible texels in a compute pass and draws each one as a quad in the world, so pixels hold their place in 3D as the camera moves. GPU-driven, with nothing read back to the CPU each frame.
  • Guard perception: sight and sound checks for 100 NPCs inside a 1 ms frame budget, in Burst-compiled C# on the Job System.
  • Injuries instead of a health bar: pain, blood loss, vitality and damage per body zone. Characters who aren't hurt cost nothing per frame.
  • A semantic octree the AI queries for cover, sightlines and blood evidence without walking the scene graph every frame.
  • Hard walls between AI, injuries and rendering: they talk only through shared interfaces and ids, enforced by a test suite.

Poly Blockade

A low-poly tower defense game for iPhone, iPad and Android, coming soon. I'm a software engineer on it.

  • Towers stand beside dirt roads across a green meadow. A crystal tower fires a blue bolt at a red raptor running through smoke, while a warrior fights a goblin outside the castle walls.
  • Top-down view of a forest level, with towers on pads between dirt roads. The selected Archer Tower III shows its range as a red ring, and its upgrade wheel offers two upgrades, priced 234 and 207. A panel at the bottom gives its attack, range and attack speed.
  • The Towers screen. A card shows Archer Tower I, a fast-firing arrow tower with cheap, quick shots that shred lightly armored creeps. Its upgrade path runs through three levels, then you choose one of two final upgrades: Sharpshooter's Redoubt or Thornveil Volley. Eight towers line the left side, three still locked.
  • A snowy level under a white sky. Ice bursts from the road around a giant monster built like a castle tower, red roof and all, as an archer and a warrior attack it. A hooded rogue waits beside a tower on the left.
  • A forest level at dusk under a purple sky. A werewolf and a green beetle cross a wooden bridge over a glowing blue river, toward an elf archer and a warrior in the foreground. Two archers keep watch from a tower behind the bridge.
  • A volcanic level of grey ash and dead white trees. A red dragon breathes fire over a line of armored knights holding the castle gate, while an archer draws a bow beside them.
  • The volcanic level from above. A glowing bone dragon looms over the road near the castle, where knights with shields and two heroes fight small red monsters with spiked maces.

Liminal Games Studio website

SimX

Unity engineer

2023–2025 Meta Quest

VR medical training apps. I owned features from design through release.

  • Editor tools (C#, JSON, Addressables) for setting up patient equipment: asset-loading setup 60% faster.
  • A texture combiner that paints wounds onto patient models, so a new wound no longer needs its own skinned mesh. Content work went 40% faster.
  • An animation system built for VR to replace Unity's Animator and cut its runtime cost.
  • Quest performance work that raised the frame rate 18%: less garbage collection, shared materials and textures, fewer draw calls.
  • AI-assisted development standards the whole engineering team adopted.
  • SimX's instructor screen. On the left, a list of case presets such as Pneumonia, Asthma, Croup and Cardiac Arrest. On the right, a vitals monitor with live waveforms above the virtual room, where a child lies in a hospital bed with a clinician in blue scrubs and a man in a striped shirt beside it.
  • A hospital bay drawn three ways, left to right: as a wireframe, as plain gray models, and fully textured. A stretcher stands in the middle beside a tray holding a stethoscope, with IV poles and wall-mounted suction canisters behind.
  • A virtual hospital room. A patient in a gown lies in bed with a bandaged wrist, beside a vitals monitor, an infusion pump and a side table with a stethoscope. A man in a striped shirt stands at the bedside, and an avatar's floating head and hands hover near the monitor.
From simxvr.com.

WIN Reality

Senior Unity engineer

2022 Meta Quest 2

A VR baseball training app with thousands of active users.

  • Ball physics: trajectory, bat collision and spin.
  • URP shaders in HLSL, including a real-time ball trail.
  • A rebuilt in-headset UI, with world-space menus and interactables, that raised engagement 13%.
  • A pitch-type menu hangs in the air beside home plate in a ballpark, listing Changeup, Screwball, Curveball, Four Seam Fastball and Slider, with Screwball selected.
  • The batter's view of the pitcher in a full stadium, with the count on the scoreboard and a panel that reads Pull trigger at this color beside a pink ball.
  • On a softball field, a pitch is drawn as a green curve from the pitcher toward the batter, beside a bar marking the optimal recognition window. Markers show the optimal decision at 27 feet 7 inches and the batter's decision at 23 feet 6 inches.
  • A baseball almost on the batter as the pitcher follows through, under a scoreboard that reads Exhibition Mode with a 3–2 count and one out.
  • The pitcher mid-delivery, seen from behind home plate through a translucent blue frame that marks the strike zone.
From winreality.com.

WIN Reality Baseball on the Meta Store

Avrio Analytics

Senior AR engineer

2021–2022 Magic Leap

AR training for government clients, including de-escalation training for law enforcement. I led a team of four engineers and handled planning and stakeholder communication.

  • Colocated multiplayer: pose and voice between headsets, on one shared coordinate frame from a scanned fiducial marker.
  • NPCs on hierarchical behavior trees, with multi-stage interactions.
  • A node-based dialog editor that let designers build those behaviors 80% faster.

Contract work

VR and AR developer

2019–2021 Oculus Quest, iPhone and iPad

VR and AR apps for healthcare and medical training clients.

  • Tipping Point Media: iOS AR apps with fluid simulation shaders for liquid medication.
  • Pixacore: an Oculus Quest app that teaches CAR T-cell cancer therapy procedures.

Code & Craft

VR and AR developer

2017–2018 iPhone and iPad

Consumer apps taken from prototype to release at a startup.

POP AR

Place a to-scale virtual TV on your wall or a table, then resize it to see what fits. Built with ARKit; one of the first retail AR apps on the App Store.

Operation Viewpoint

Lead programmer

2017 HTC Vive

The Operation Viewpoint title card: cartoon robot guards over a yellow corridor crossed by red laser beams. Play video

An asymmetric multiplayer stealth game for VR. Two players work together to get through a level full of guards. I built the AI and the multiplayer networking, and worked on the core design.

The Hollows

Lead engineer

2017 HTC Vive

A gloved hand with glowing blue lights reaches for a large crystal in a dark blue cave. Play video

A VR cave exploration game. Collect crystals to stay charged, keep the Shadows away, and search the caverns for a treasure called the Constellation. It has custom locomotion and optimized real-time lighting.

Made by a team of students in Ira Fay's Virtual Reality Lab class at Hampshire College, spring 2017.

The Virtual Memory Palace

Developer

2016 Google Daydream

A memory palace trainer built with a team of four at the MIT Media Lab's Reality, Virtually hackathon.

Intro video Devpost page

Skills

Engines and languages
Unity, C#, HLSL and ShaderLab, C++, Unreal Engine 5
Rendering
URP and HDRP, shader programming, compute shaders and GPU-driven rendering, profiling and optimization
Systems
NPC AI (behavior trees, state machines, perception), networked multiplayer and voice, physics, animation, in-headset UI
Unity tooling
Custom editor tools, Addressables, Burst and the Job System, Unity Test Runner, CI/CD
Platforms
Meta Quest 2, 3 and Pro; HTC Vive; Oculus Rift; Magic Leap; Microsoft HoloLens; Google Daydream; iOS with ARKit; Android with ARCore
Other tools
Git, Jira, Rider, Visual Studio, Autodesk Maya, Adobe Photoshop
Education
B.S. in informatics, University of Massachusetts Amherst

Write to me

I'm open to full-time roles and contract work in games, VR and AR.

mehediahmed2 at gmail.com
Email me

Résumé (PDF) LinkedIn