Domain-Specific Language Engineer

About the PositionJane Street is seeking a skilled Software Engineer with expertise in language compilers and runtime systems. You will join our dedicated team, responsible for maintaining a robust framework utilized across various applications, including financial modeling, risk assessment, and custom alert notifications. Our innovative system processes a complex, dynamic graph of user-defined computations in real-time and in parallel. We are particularly dedicated to enhancing performance and scalability while tackling challenges related to programming language implementations, efficient computation graph scheduling, and precise resource usage metrics.About YouYou possess a strong foundation in compilers, scheduling, dynamic graph systems, parallel runtimes, or a related discipline.You have significant experience in performance analysis and optimization.Prior knowledge of OCaml or functional programming languages is not a prerequisite.

About the PositionJane Street is seeking a skilled Software Engineer with extensive experience in programming languages to join our dynamic team. Our OCaml Language team is dedicated to enhancing the OCaml programming language, serving as the backbone of our expanding technology stack. We collaborate closely with the broader OCaml community to address various aspects of the language, making it more accessible for developers to articulate their ideas in OCaml, improving the performance of the generated code, and optimizing the OCaml compiler for better speed and usability.Throughout the years, our team has made significant advancements, including extending the type system to support innovative language features, completely re-engineering the optimizer, and introducing feedback-directed optimization. We also work on enhancing the surrounding toolchain, developing tools for profiling, debugging, and documentation generation. The majority of our projects are open-source, and we strive to contribute as much as possible back to the mainstream OCaml compiler.About YouWe are looking for candidates with several years of practical experience in language design and implementation within industrial settings for this specialized role on the OCaml Language team. While research experience and publications in programming languages are advantageous, they are not mandatory. Previous knowledge of OCaml or functional programming languages is not a requirement.

At Trunk Tools, we are pioneering the integration of AI in the construction industry, which is the second-largest sector globally. Recently, we successfully secured a $40 million Series B funding round led by Insight Partners, bringing our total funding to $70 million from esteemed investors such as Redpoint and Innovation Endeavors. This investment is propelling us into our next stage of growth as we deploy AI agents across various job sites.Our mission is to revolutionize construction through intelligent automation. Despite being a $13 trillion industry, many processes remain outdated and analog. We are on a mission to transform this landscape by embedding AI directly into field operations.Founded by professionals from the construction and technology sectors, including alumni of Stanford and MIT, our team has developed software utilized by over 140,000 field professionals, impacting millions and contributing to over $10 billion in completed projects. Many team members have firsthand experience in the field, granting us a profound understanding of the industry's unique challenges.After years of development, we are ready to launch production-level AI agents, starting with intelligent document processing and question-answering solutions, and we are rapidly expanding into core operational workflows. With our team having doubled in size over the past year to over 65 employees (including more than 25 engineers), we are entering a phase of hypergrowth. This is a unique opportunity to join us at a pivotal moment.

About Us: At EvolutionIQ, we are dedicated to revolutionizing the insurance claims landscape with cutting-edge technology that enhances the accuracy, fairness, and efficiency of claims handling. Our goal is to ensure that individuals affected by injury or illness can lead their lives with dignity and stability. In light of our rapid growth, we are on the lookout for exceptional talent eager to contribute to our scaling efforts and transform the insurance sector. Our team is our top priority, and we are proud to be recognized as one of Inc.’s Best Workplaces for three consecutive years and Built In’s Best Places to Work in 2025 and 2026!The Adventure: As the leading AI Guidance Platform in the insurance industry, we collaborate with some of the largest insurance carriers in the US and are expanding our reach globally. Our impressive growth is underscored by a near 100% success rate in transitioning pilots to production deployments. You will have the opportunity to design on a unified platform that scales across diverse lines of business. Our engineering culture emphasizes simplicity, foundational engineering principles, quality, transparency, and strong collaboration. If you are enthusiastic about working in a dynamic enterprise engineering team utilizing the latest technologies at scale, we want to hear from you!About You: As a driven AI/LLM Engineer, you will be pivotal in enhancing our leading medical synthesis product. You possess a strong sense of ownership over your projects and have a proven history of managing projects from inception to deployment. Excelling in a fast-paced startup atmosphere, you keep abreast of the latest AI and machine learning developments. Your passion lies in integrating hybrid approaches that fuse large language models (LLMs), statistical machine learning techniques, and retrieval-augmented generation (RAG) with embedding-based models to deliver superior, reliable outcomes for our users.In this Role You Will:Design, build, and deploy AI-driven and LLM-powered features for our claims synthesis product, including effective extraction of critical information from intricate medical documents and human-in-the-loop summarization workflows.Develop and implement hybrid machine learning solutions that utilize statistical models, LLMs, and embedding-based retrieval techniques such as RAG to enhance system accuracy, scalability, and robustness.Write clean, scalable, and efficient code while optimizing the performance of existing AI/ML systems in production.

At EngFlow, we empower developers to streamline their software building and testing processes. Our innovative cloud-based and distributed service significantly enhances developer workflows through remote execution and intelligent caching, resulting in improved efficiency, productivity, and product quality.Backed by leading investors, EngFlow is at the forefront of transforming the software development landscape. We deliver solutions that accelerate builds by tenfold or more, while our observability platform offers actionable insights for optimization. Founded by prominent contributors to Bazel, we create tools that enable engineering teams—from dynamic startups to established Fortune 500 companies—to boost developer velocity and enhance build performance.Find out about our mission, culture, and team: EngFlow | Watch our VideoAs a Software Engineering Manager specializing in build systems, compilers, and programming languages, you will lead a talented engineering team and spearhead the development of pivotal features for our platform. You will have a significant impact on collaborative projects involving Bazel, gRPC, Goma, Soong, CMake, and other open-source initiatives, addressing intricate scalability and performance challenges. This role presents abundant opportunities to explore cutting-edge technology and contribute to a scalable product utilized by some of the most exciting tech companies globally.You will report directly to the Head of Product Engineering, and your responsibilities will encompass project leadership, team management, and direct contributions to product and platform engineering. Over time, this position may evolve from an individual contributor role to a managerial position.

About Mirage Mirage builds an AI-powered video platform that connects production and editing through natural language processing. Our models use contextual awareness to mirror the choices of skilled editors, streamlining workflows for experienced teams and making video creation more accessible to a wider audience. Learn More Our Product (Captions by Mirage) Our Research (Seeing Voices, technical white paper) Latest Updates (Mirage on X / Twitter) Mirage has been featured in TechCrunch, Forbes AI 50, and Fast Company. Our Investors Mirage is backed by leading venture firms and entrepreneurs, including Index Ventures, Kleiner Perkins, Sequoia Capital, Andreessen Horowitz, and others. Location Requirement All roles at Mirage require in-person work at our Union Square headquarters in New York City. Role Overview: Research Engineer – Large Language Models Mirage seeks a Research Engineer to design, build, and scale systems for training and deploying large language models, with a focus on multimodal creative applications in video analysis. This role works closely with researchers to turn new ideas into efficient, production-ready systems that strengthen our platform.

Join Datadog's innovative Applied AI group, where we are redefining user interaction with our platform through cutting-edge artificial intelligence capabilities. Our teams focused on Natural Language Query (NLQ) and Command-I (Cmd-I) are leading the charge in transforming how users can effortlessly query telemetry data, troubleshoot production issues, and configure their Datadog experience using natural language and intelligent conversational agents.As an Engineering Manager I in the Applied AI division, you will spearhead a dynamic team of engineers and applied scientists dedicated to developing natural language interfaces and conversational AI systems. Your team will tackle exciting challenges including LLM-powered query translation, context-aware retrieval systems, agentic architectures, and robust evaluation frameworks. You will be instrumental in guiding technical execution, nurturing team growth, and collaborating across engineering, product, and research disciplines to deliver AI-driven experiences that fundamentally enhance how our customers engage with Datadog.At Datadog, we deeply value our office culture, fostering relationships and collaboration that ignite creativity. We embrace a hybrid workplace model, allowing our team members to achieve a harmonious work-life balance tailored to their individual needs.

At StubHub, we are dedicated to transforming the live event experience for fans around the world. Whether it’s their first concert or a long-awaited game, we aim to create an unforgettable journey from the moment they seek tickets until they enter the venue. Our commitment extends to our sellers too, from individual fans to large promoters, ensuring StubHub remains the safest and most convenient platform for ticket transactions globally.Join Our Team:We are on the lookout for an exceptional Senior Software Engineer to become a key member of our Platform Runtime team. In this dynamic role, you will be integral in designing, developing, and sustaining a comprehensive suite of SDKs, services, shared packages, and tools that empower our engineering teams, enhancing productivity and operational efficiency across the organization.About the Team:The Platform Runtime team is committed to creating a seamless, high-performance runtime environment that supports numerous services at StubHub. We prioritize implementing best practices to address essential engineering challenges, including configuration management, connectivity, caching, and messaging.Location: Hybrid (3 days in office/2 days remote) – Century City, CA or Aliso Viejo, CA or New York, NYYour Responsibilities:Design and develop SDKs, services, shared packages, and tools to improve engineering efficiency and productivity.Create an intuitive, cross-language performant runtime environment to serve as a foundation for business/customer-facing services.Architect and implement high-performance, scalable services utilized by internal stakeholders.Act as a subject matter expert in distributed caching and messaging, showcasing a profound understanding of relevant design patterns.Collaborate with engineering teams to identify technical inefficiencies and propose scalable solutions and methodologies.Lead initiatives aimed at boosting performance and scalability across our platform.Promote best practices in software development, ensuring high standards of quality and efficiency.

JOB SUMMARYWe are seeking a talented and experienced Korean linguist to serve as a Language Lead Backup for our key account. This role is crucial as it involves stepping in to assume the review responsibilities in the absence of our primary Hebrew Language Lead or when additional support is required.As the primary reviewer, you will be responsible for conducting comprehensive linguistic reviews and quality assurance checks, ensuring all content adheres to the highest standards and aligns with client-specific guidelines. This role demands attention to detail and a proactive approach to maintaining quality.The ideal candidate will be available to work during PST business hours (9:00 AM – 5:00 PM) to accommodate client delivery schedules.

Baystate Interpreters seeks in-person interpreters in Albany, New York. This position centers on supporting clear communication across different languages for a range of community settings. Role overview Interpreters will use their language proficiency to help people understand one another in person. Assignments may involve healthcare, education, legal, or social service environments, depending on client needs. What you will do Interpret spoken conversations accurately and confidentially between parties Work in various locations around Albany, adapting to each setting Support individuals from diverse backgrounds by ensuring their voices are heard Requirements Fluency in English and at least one other language Strong listening and communication skills Professionalism and cultural sensitivity

Role overview Smith Engineering is seeking a Director of Design Engineering to lead its design team in New York City. This leader will oversee the development of engineering solutions that meet client requirements and comply with industry standards. The role involves shaping project direction and supporting the growth of a skilled group of engineers. What you will do Guide and manage the design engineering team Drive the creation of efficient, high-quality engineering designs Ensure all work aligns with client needs and industry standards Mentor and develop engineering talent within the team Influence the direction of engineering projects at Smith Engineering

fullmind is seeking a Virtual Italian Language Educator to support students remotely from Brooklyn, New York, or anywhere in the United States. This position centers on teaching Italian through live online sessions and encouraging students to explore both the language and its cultural context. What you will do Design and prepare lesson plans tailored to an online classroom Deliver instructional content that keeps students engaged Assess student progress and provide feedback to help them grow Requirements Fluency in Italian Experience or strong interest in teaching Comfort working in a virtual learning environment This role offers the chance to help students develop their Italian language skills in a supportive, interactive setting.

Baystate Interpreters is looking for in-person interpreters in Buffalo, New York. This role centers on providing clear, accurate interpretation for a range of languages in face-to-face settings. Role overview Interpreters will help people communicate across language barriers. Assignments may take place in community, healthcare, legal, or educational environments. Professionalism and attention to detail are important in every interaction. Requirements Fluency in at least one language other than English Strong spoken communication skills Ability to interpret in person within the Buffalo area What you will do Facilitate conversations between parties who speak different languages Ensure messages are conveyed accurately and respectfully Support understanding in a variety of settings

About the Role Smith Engineering is hiring a Director of Energy Engineering to guide the energy solutions team in New York City. This senior leader will shape project direction and help set the strategy for energy initiatives across our portfolio. What You Will Do Lead a team focused on delivering energy engineering projects Develop and implement strategies that strengthen our energy solutions Oversee project execution and ensure alignment with company goals What We’re Looking For Extensive experience in energy engineering Proven leadership and team management skills Ability to drive strategic initiatives in a technical environment This position is based in New York City.

Position Reports to: School Director Start Date: 2025-2026 School Year Hours: 7:30am-4:45pm Compensation: $75,000-$105,000 (Salary is contingent upon qualifications and years of experience) About Us: At Classical Charter Schools, we pride ourselves on transforming education in the South Bronx. As one of New York City's premier charter networks, we have received the prestigious National Blue Ribbon Award five times and consistently outperform 97% of New York charters. Our classical curriculum emphasizes art, music, Latin, debate, and character education, shaping the minds of our students. We are committed to diversity and equal opportunity in our hiring process. We encourage individuals from all backgrounds to apply, ensuring that each candidate is evaluated based on their merits and qualifications. Our benefits include comprehensive health coverage, competitive salaries, and opportunities for professional development.

Baystate Interpreters is looking for in-person interpreters in New York, NY. This position centers on helping people communicate clearly across different languages and backgrounds. Assignments may take place in medical offices, legal proceedings, or educational institutions. Role overview Interpreters will use their language expertise to support conversations between individuals who do not share a common language. The work involves listening, accurately interpreting spoken words, and conveying meaning so that all parties understand each other. Key responsibilities Interpret spoken communication in real time during in-person meetings or appointments Work in settings such as healthcare, legal, and educational environments Help ensure accurate and clear understanding between all parties involved Requirements Fluency in at least one language in addition to English Strong listening and communication skills Ability to maintain professionalism and confidentiality

Uncommon Schools seeks dedicated English as a New Language Specialists who are passionate advocates for their students. In this role, you will manage the education of a diverse population of English Language Learners while providing essential support to your General Education colleagues. Your expertise will play a pivotal role in offering academic interventions that assist students in developing their English language skills, enabling them to achieve high academic success.Key Responsibilities1. InstructionAnalyze intake assessments to tailor educational services and instructional methods to meet the unique needs of each student based on their English proficiency.Deliver small group instruction to entering and emerging English Language Learners.Provide push-in support for English Language Learners across various grade levels and content areas.Collaborate with general education teachers to advocate for necessary classroom accommodations that foster student growth.Engage with families across all grade levels to address inquiries regarding student progress and required accommodations.Utilize standards-based assessment data to refine and differentiate curriculum and instructional approaches.2. English as a New Language Specific DutiesWork closely with general education teachers, school leaders, and families to analyze and respond to trends in student work samples and assessments, ensuring language development and curriculum access.Collect academic growth data and establish goals to support student progress toward English proficiency.Teach small groups of newcomers across various grade levels, integrate into general education settings, implement strategies for differentiated instruction, and create modified materials for English Language Learners.3. School CultureFoster positive relationships with students to ensure they feel valued and heard.Collaborate with students’ families to ensure they have access to necessary resources to support their child's learning needs.Participate in practice-based professional development, mentorship, and coaching sessions.Engage in weekly, school-wide meetings to build community, exemplify our core values, and promote student achievement.Work alongside your grade level team to set academic goals and refine instructional strategies.Facilitate school-wide professional development to assist teachers in developing differentiated instruction plans.

Baystate Interpreters is hiring an American Sign Language (ASL) Interpreter in Rochester, New York. This position centers on supporting communication between Deaf and hearing individuals across a range of environments. Role overview The ASL Interpreter will facilitate conversations and interactions, making sure that information is conveyed accurately and clearly. Assignments may include educational, medical, legal, or community settings, depending on client needs. Key responsibilities Interpret spoken and signed communication to bridge understanding between Deaf and hearing participants Support inclusivity and accessibility in every assignment Maintain professionalism and confidentiality at all times Location This role is based in Rochester, New York.

About BasisBasis is a pioneering nonprofit organization dedicated to applied AI research, driven by a dual mission.Firstly, we aim to deepen our understanding and development of intelligence. This involves establishing the mathematical foundations of reasoning, learning, decision-making, understanding, and explanation, along with creating software that embodies these principles.Secondly, we strive to enhance society’s capacity to tackle complex challenges. This means broadening the scale and complexity of the problems we can address today, while also accelerating our future problem-solving capabilities.To realize these aims, we are constructing an innovative technological framework inspired by human reasoning and fostering a collaborative organization that prioritizes human values.About the RoleAs a Research Scientist at Basis, you will play a crucial role in advancing our understanding of the theoretical, mathematical, and computational principles underlying intelligence.Our Research Scientists possess key characteristics:Outstanding technical expertise—strong mathematical and computational foundations.A creative builder’s mindset—capable of designing, constructing, and refining complex systems based on foundational principles.Commitment to scientific rigor—engaging in high-quality, robust scientific inquiry without hesitance to experiment, learn from mistakes, and explore unconventional ideas.At Basis, collaboration is key, both within our teams and with external partners. We seek individuals who thrive in collaborative environments and are eager to tackle challenges that transcend individual capabilities.Programming Languages Research ScientistsThis role is tailored for experts in the design, implementation, and analysis of programming languages. You will assist in the design and implementation of the foundational computational reasoning systems under development at Basis.Key focus areas of programming languages research include compiler design, partial evaluation, program analysis, abstract interpretation, and program transformation. This work is conducted within the context of constructing reasoning systems, leading to engagement with topics such as probabilistic programming, automatic differentiation, and SAT/SMT solvers.Expectations:Possess a PhD (or equivalent experience) in a relevant field.