T

Twin Prime

Defense-focused AI for sensor data fusion

AI Engineer

Full-Time
No salary listed
Mid
New York, NY, USA+1 moreMore locations: Athens, Greece
In Person
AI & Machine LearningApplied Machine Learning, Computer Vision

About the job

Requirements
  • Experience training, fine-tuning, evaluating, and deploying deep learning models in research or production environments.
  • Strong programming skills in Python and experience with PyTorch or a comparable deep learning framework.
  • A solid understanding of deep learning fundamentals, including model architectures, optimization, and evaluation.
  • Experience in computer vision, multimodal learning, generative modeling, or related areas.
  • Ability to translate research papers and experimental ideas into working, maintainable code.
  • Ability to diagnose problems across data, model behavior, and system performance.
  • Comfort working closely with researchers and engineers on open-ended technical problems.
Responsibilities
  • Implement and adapt models for video understanding, spatial reasoning, and multimodal learning.
  • Build data processing, training, and evaluation pipelines.
  • Design experiments, analyze model behavior, and translate findings into improvements.
  • Optimize inference performance, memory usage, and deployment on constrained hardware.
  • Integrate models into reliable systems that process complex sensor data in real time.
  • Build tools that make research workflows reproducible and accelerate the path from prototype to deployment.
Desired Qualifications
  • Experience with distributed training or large-scale data pipelines.
  • Experience with model compression, quantization, inference runtimes, or edge deployment.
  • Familiarity with video, 3D, spatial, or other sensor modalities.
  • Experience building performance-critical software in C++ or CUDA.

About the company

T

Twin Prime

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Website

Twin Prime builds specialized AI models for defense and security. Its technology processes and reasons over data from many sensor types used in real-world security and defense operations, helping operators act with urgency and effectiveness. The company uses a proprietary AI platform to fuse sensor data and provide actionable insights, often in collaboration with defense partners. A key differentiator is the team’s deep background from Google Research, Lawrence Livermore National Laboratory, and military programs, plus strategic backing from Theon International through a joint venture in Greece to customize, deploy, and commercialize bespoke AI solutions. The company is pursuing pre-seed funding and aims to develop, commercialize, and deploy tailored AI systems that enhance decision-making and operational readiness in security and defense contexts.

Company Size

1-10

Company Stage

Seed

Total Funding

$10M

Headquarters

null

Founded

2025

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Simplify's Take

What believers are saying

  • May 2026: Theon invested $3 million and took a minority stake.
  • May 2026: Expeditions led a $10 million pre-seed round, signaling strong investor conviction.
  • Theon's global sensor footprint gives Twin Prime immediate distribution and reference deployments.

What critics are saying

  • Twin Prime relies on Theon and Expeditions; a failed JV stalls commercialization by 2027.
  • Defense procurement cycles drag; first deployments can slip beyond 2027 despite May 2026 announcements.
  • Export controls, data-security reviews, and classified-data access can block customer adoption completely.

What makes Twin Prime unique

  • 2025 founders from Google Research, HRT, LLNL, Pentagon, and armed forces.
  • Twin Prime builds multimodal models for sensor fusion in defense and security operations.
  • Theon JV in Greece embeds Twin Prime inside electro-optical defense products.

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Company News

Tech.eu
May 14th, 2026
Twin Prime lands $10M pre-seed to build frontier AI models for defence and security.

Twin Prime lands $10M pre-seed to build frontier AI models for defence and security. Founded by researchers spanning AI, quantitative finance, and national security, the startup is developing multimodal AI systems to fuse sensor data and accelerate real-time decision-making. Frontier AI lab for defence and security Twin Prime has raised have $10 million in pre-seed funding led by Expeditions, with additional investment from American and European VCs, Theon, family offices, and angels from within Palantir, Anduril, Quorum, and more. Twin Prime is developing AI models that natively reason on data from a large number of sensor modalities in the physical world, notably across the national security landscape, compressing the perception-to-decision layer to enable smart, real-time action against threats. The company was founded in 2025 by George Lentzas, Stephane Sezer, Drew Calcagno, and Michael Leite-Garcia, a multinational team of researchers in frontier AI, quantitative finance, and national security. Collectively, they have extensive experience at top institutions, including Hudson River Trading, Google Research, Lawrence Livermore National Laboratory, Columbia University, the White House, the Pentagon, and various branches of both the US and European armed forces. Mikolaj Firlej, Co-founder and GP of Expeditions, said: "Current AI models are not specialised enough to capture the complexity of modern war and wider security challenges. They usually have limited applicability at the edge and often overlook sensor integration and critical data feeds. Twin Prime is developing models purpose-built for high-stakes environments where size, fusion and speed are critical. At a time when most defence prime contractors struggle to integrate advanced AI models, the Twin Prime team presents a clear commercial value not just by retrofitting legacy systems, but by transforming their operations." Twin Prime and Theon, a large European defence prime, also intend to form a Joint Venture to develop, commercialise, and deploy bespoke AI solutions built upon Twin Prime's proprietary models. The JV will augment Theon's extensive deployment of sensors and other defence product offerings, particularly as a continuation of its Theon Next initiative. Follow the developments in the technology world. What would you like us to deliver to you?

Expeditions Fund
May 14th, 2026
Expeditions leads $10M pre-seed round for Twin Prime, the frontier lab building AI models for defense and security – Expeditions

Expeditions, the leading early-stage investor in European security, led a $10M pre-seed into Twin Prime, a frontier AI lab building specialised models for defense and security.

MarketScreener
May 13th, 2026
Theon International invests $3M in AI lab Twin Prime, plans JV for defense tech integration

Theon International has announced a $3 million strategic investment in Twin Prime, a US-based frontier AI lab focused on defence and security applications. The companies plan to establish a joint venture owned 60% by Theon and 40% by Twin Prime to integrate AI models into Theon's product portfolio. Twin Prime, founded in 2025, is developing AI models that process data from multiple sensor modalities in defence and security settings. The pre-seed funding round is led by Expeditions, a European early-stage investor in security technology. The JV will be incorporated in Greece and complement Theon's existing internal AI team. Theon will acquire a single-digit minority equity stake in Twin Prime for the cash consideration. This follows Theon's previous minority investments in Kopin Corporation and Varjo Technologies.

Theon International
May 13th, 2026
THEON invests in Twin Prime and plans Joint Venture to integrate Artificial Intelligence across its product portfolio.

THEON invests in Twin Prime and plans Joint Venture to integrate Artificial Intelligence across its product portfolio. May 13, 2026 THEON invests in Twin Prime & plans JV to integrate AI across its product portfolio 13 May 2026 - Theon International Plc (THEON) is pleased to announce a $3 million strategic investment in Twin Prime, a US-based frontier AI lab building specialized models for defense and security. The companies also intend to form a Joint Venture (the "JV") to integrate AI models into THEON's products and accelerate its AI research and development efforts, as a continuation of the THEON Next initiative. Deal Structure THEON will acquire a single digit minority equity stake in Twin Prime for a total cash consideration of $3 million. Concurrently, THEON and Twin Prime have agreed to establish a JV, owned 60% by THEON and 40% by Twin Prime, to develop, commercialise, and deploy bespoke AI solutions built upon Twin Prime's proprietary AI platform. The JV will be incorporated in Greece and will complement and accelerate the efforts of THEON's established internal AI team. Company Profile Twin Prime is a new frontier AI lab, dedicated to defense and security, currently concluding a pre-seed investment round, led by Expeditions, a leading early-stage investor in European security, focused on startups at the early stage intersection of security and deep tec. Twin Prime is developing AI models that natively reason on data from the large number of sensor modalities in the physical world, notably across the defense and security landscape, to enable operators to act urgently and effectively. Twin Prime was co-founded in 2025 by George Lentzas, Stephane Sezer, Drew Calcagno, and Michael Leite-Garcia, a multinational team of researchers in frontier AI, quantitative finance, and national security. Collectively they have extensive experience at top institutions including Hudson River Trading, Google Research, Lawrence Livermore National Laboratory, Columbia University, the White House, the Pentagon, and various branches of both the US and European armed forces. Investment Rationale * Acceleration of internally developed AI capabilities across THEON's product portfolio. * Expanding footprint in the U.S., while accessing the rapidly evolving AI sector. * Strategic partnership with a leading Polish technology investment fund, focused on Polish defense companies. * Proprietary IP secured at JV level. * Expansion of addressable market and enhanced product offering. This investment follows the approach THEON has successfully applied in its previous minority stakes in KOPIN Corporation and VARJO Technologies, transactions that have both accelerated THEON's R&D capabilities and delivered capital appreciation for shareholders. The financial contribution of those earlier investments is expected to be further reflected in THEON's Q2 2026 results. Nikos Vasiliadis, R&D Director at THEON commented: "At THEON, we continuously invest in technologies that give operators a decisive edge in increasingly complex operational environments. Twin Prime's unique capability to natively reason across multiple sensor modalities represents a significant step forward in how data is interpreted and acted upon in real time enhancing our integrated electro-optical solutions that enable faster, more effective decision-making across defense and security missions." Philippe Mennicken, BD Director & Deputy CEO of THEON commented: "We have built a strong AI foundation with our ARMED product series and future soldier solutions. This investment will enable us to accelerate our internal AI initiatives to further empower THEON Next product development. We are equally happy to establish our first partnership with a leading European investor in defense and security based in Poland, which marks our strategic entry point into the Polish market." Mikolaj Firlej, GP & co-founder at Expeditions, stated: "We are very excited that THEON participates as a strategic partner in the pre seed financing round of Twin Prime. THEON's track record as an investor and long-term partner to early stage and growth companies is a good indicator for the success of this venture. We look forward to supporting Twin Prime alongside THEON as they work together to deploy and scale Twin Prime's custom AI models across their products." For inquiries, please contact: | Investor Relations | Media Contact | | Nikos Malesiotis | Elli Michou | | E-Mail: [email protected] | E-Mail: [email protected] | | Tel: +30 210 6772290 | Tel: +30 210 6728610 |