Member of Technical Staff - Post-Training
Reflection AI
Member of Technical Staff – Post‑Training Reflection AI is building open superintelligence and making it accessible to all. We’re developing open‑weight models for individuals, agents, enterprises, and even nation states. Our team of AI researchers and company builders come from DeepMind, OpenAI, Google Brain, Meta, Character.AI, Anthropic and beyond. About the Role Build systems that transform pre‑trained models into aligned and general agents. Drive research and engineering initiatives pushing the frontier of post‑training, from data curation to large‑scale optimization. Develop data‑generation pipelines, reward models, reinforcement‑learning algorithms, and inference‑time scaling techniques. Collaborate across pre‑training and post‑training teams to deliver step‑function gains in model capability. Contribute to shaping our understanding of how large models learn to reason, follow instructions, and improve through reinforcement learning. About You Deep understanding of machine‑learning fundamentals and practical experience with large‑scale LLM training. Strong engineering skills, comfortable diving into complex ML codebases and distributed systems. Experience improving model behavior through data, reward modeling, or RL techniques. Evidence of owning ambitious research or engineering agendas that led to measurable model improvements. Thrives in a fast‑paced, high‑agency startup environment; bias toward action and clear execution. Able to work fluidly across research and infra boundaries. Strong communication capabilities and comfort working collaboratively. Passionate about advancing the frontier of intelligence. What We Offer Top‑tier compensation: salary and equity structured to recognize and retain the best talent globally. Health & wellness: comprehensive medical, dental, vision, life, and disability insurance. Life & family: fully paid parental leave for all new parents, including adoptive and surrogate journeys. Financial support for family planning. Benefits & balance: paid time off when needed, relocation support, and perks that optimize your time. Opportunities to connect with teammates: lunch and dinner are provided daily. We have regular off‑sites and team celebrations. Seniority level Entry level Employment type Full‑time Job function Engineering and Information Technology Industries: Software Development #J-18808-Ljbffr Reflection AI
- ...and acted upon by intelligent systems. Role Summary: As a Member of Technical Staff, you’ll help bridge the gap between cutting‑edge research... ...deployments Own the full stack of ML workflows: data ingestion, training, evaluation, deployment, and monitoring Improve platform...Training
People In AI
New York, NY2 days ago - ...and improve ML components across data, training, evaluation, and inference. Fine-tune and... ...engineering and product excellence. All members are expected to be hands-on and to contribute... .... Applications are evaluated by our technical team members. Interviews will be...Training
Bjak
New York, NY2 days ago - ...meaningful advances in recent years have come not from new architectures, but from better data.As a member of the Data Team, your mission is to ensure that the data used to train our models meets a high bar for quality, reliability, and downstream impact. You will directly...TrainingWork at officeVisa sponsorship
Reflection AI
New York, NY1 day ago - ...As a Member of Technical Staff at Quadrillion Labs, you'll build the systems that power Qualia, our research agent. This is a mix of exciting... ...knowledge. Scale environments for agent experiments and training. Help us build the sandboxed compute where agents run...TrainingWork at officeLocal area
Quadrillion Labs, Inc
New York, NY15 hours ago - ...the field and shape what comes next. Member of the Technical Staff, Molecular Generation Location Employment... ...spans the full arc from research to trained model: you design architectures,... ...or a related field with 2+ years of post-doctoral or industry research experience...TrainingFull time
- ...are designed to solve real-world business problems. We’re training and deploying frontier models for enterprises who are... ...York City, Montreal, Seoul, Germany and Paris. Join us! Member of Technical Staff, Search Why this role? We are looking for talented individuals...TrainingFull timeWork at officeLocal areaRemote workHome office
- As a Member of Technical Staff (Research) at Quadrillion Labs, you'll help train our next-generation model for research creativity. This is genuinely hard: very few people have post-trained models at the scale of several hundred billion parameters, and we're doing it with...TrainingWork at officeLocal area
- Member of the Technical Staff, Cheminformatics Employment Type Full time Department Science Compensation... .... You will continue developing and training models that incorporate knowledge of... ...or a related field with 2+ years of post-doctoral or industry research experience...TrainingFull time
- ...production assembly, and field repair. About the role As a Member of Technical Staff focused on Agentic Reasoning & Core Capabilities, you... ...coding agents, computer-use agents, multi-agent systems, RL/post-training, synthetic data generation, harness engineering, or...TrainingLocal areaRelocation package
- ...intelligence to serve humanity. We’re training and deploying frontier models for developers... ...the future! Why this role? As a Member of Technical Staff in the Safety for Agents team, you... ...primary focus will be on data generation, post‑training algorithms, and evaluation...TrainingFull timeWork at officeRemote workFlexible hours
$172.5k - $260.1k
...highly skilled and experienced Lead Member of Technical Staff (LMTS) to join our API Platform team... ...arrangements in accordance with applicable law. Posting Statement Salesforce is an equal... ..., compensation, promotion, benefits, training, assessment of job performance,...TrainingContract workImmediate start- Member of Technical Staff - Computational Biologist Valthos | Posted Mar 3 Full-time Negotiable Advanced (5-10 yrs) Computational Biologist Valthos Inc. Valthos... ...large-scale biological datasets appropriate for training frontier biological models, and build workflows...TrainingFull timeWork at office
- ...and reliability Wall Street demands is one of the hardest applied AI problems out there. Our technical staff works across the stack: agent architecture, evals, model post-training, and new product surfaces. You'll ship to the largest financial firms in the world. Example...TrainingFull timeShift work
Endex Inc
New York, NY2 days ago - ...builds and operates the shared services that power our research, training, and production environments the systems multiple teams depend... ...mentor, and grow the engineers who own this layer, guide the technical and architectural decisions that shape it, and work closely...TrainingWork at officeVisa sponsorship
Reflection AI
New York, NY1 day ago - ...several of the top labs. Our work sits at the intersection of post-training, agent environments, data quality, and research... ...like Stripe, Snap, AWS, and Microsoft, and with people who have spent years shipping high‑impact technical products. #J-18808-Ljbffr...Training
Chakra Data Warehouse
New York, NY1 day ago - ...Role: Most of the value of owning a model shows up at serving time. We're building a platform that covers the whole life of an LLM -- train it, deploy it, observe it -- and inference is where teams feel the difference every day. We already run elastic inference, sandboxes...TrainingWork at office
Mixpeek
New York, NY15 hours ago - ...platform for specialized intelligence, enabling companies to build, train, and serve AI models tailored to their own data, workflows, and... ...'ll architect scalable, resilient backend infrastructure, lead technical design discussions, mentor engineers, and establish best...Training
Fireworks AI
New York, NY3 days ago - ...ship, and maintain the software yourself and through the other technical staff you coordinate on-site and at HQ. Write production code... ...so the two evolve in lockstep, including the cultural work: training, change management, work instructions, quiet one-on-ones with...TrainingWork at office
AIC
New York, NY2 days ago - ...R&D, integration testing, production assembly, and field repair. About the role As a Machine Learning Engineer focused on Data & Training Infrastructure, you will join Arena's Platform team to build the data generation and training substrate behind the first electromagnetic...TrainingLocal areaRelocation package
Arena Physica
New York, NY1 day ago - ...organizational structure, where every team member is empowered to actively contribute.... ...and communicating complex results to both technical and non-technical audiences. Excellent... ...understanding of computer architecture, parallel training of AI models, and GPU optimization....TrainingWorldwide
- ...advances come not from new architectures, but from better data. As a member of the Data Team, your mission is to build and operate the... ...‑scale data sources into reliable, well‑structured corpora for training frontier models. You will own the machinery that acquires,...TrainingRelocation package
- ...generalizable evaluation frameworks that capture what matters for reasoning, alignment, and usefulness Collaborate closely with pre‑training, post‑training, and applied teams to translate insights into model improvements Push the boundaries of what’s measurable, from...TrainingRelocation package
- About The Role Design, build, and operate large-scale GPU infrastructure for high-throughput model inference and mid-training workloads. Develop systems that power synthetic data generation and reinforcement learning pipelines at scale. Build high-performance inference...TrainingRelocation package
- ...performance debugging at this scale presents genuinely hard systems problems. More broadly, you will work closely with Reflection's training teams to co-design fault tolerance, node health checks, and remediation strategies. What You'll Do Cluster Management: Build and...TrainingWork at officeVisa sponsorship
$220k
...platform are paid over $4 million per day to train frontier AI models. Mercor's APEX... ...systems Comfort with core ML/LLM concepts - post training, evaluation metrics, reward modeling... ..., fast-moving environments with sound technical judgment Proven ability to coach...TrainingWork at officeRelocation package- ...with several of the top labs. Our work sits at the frontier of post-training, agent environments, data quality, and research... ...Customer instincts. You communicate clearly with researchers and technical customers, push back when they're asking for the wrong thing,...Training
- About Us: Fireworks is the platform for specialized intelligence, enabling companies to build, train, and serve AI models tailored to their own data, workflows, and products. Founded by the team behind PyTorch and backed by AMD, Atreides, Benchmark Capital, Index Ventures...TrainingShift work
$250k - $350k
...optimization loops and apply your findings to our pretraining, post-training and inference systems as applicable. Drive product &... ...codebase. Excellence in scientific communication: You relate technical information with rigor and crystal clarity to researchers, engineers...TrainingRemote jobWork experience placementFlexible hours- ...platform for specialized intelligence, enabling companies to build, train, and serve AI models tailored to their own data, workflows, and... ...the world's most innovative AI products.This is a highly technical role requiring deep expertise in distributed systems, cloud-native...Training
- Member of Technical Staff - Applied AI Engineer Valthos | Posted Mar 3 Full-time Negotiable Advanced (5-10 yrs) Valthos Inc. Valthos is an applied biological intelligence... ...modeling approaches—including adapting and post-training biological frontier models—for tasks in...TrainingFull timeWork at office
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