Senior Software Engineer - Compiler Development

Team overview The Server Query team at MongoDB develops and maintains a distributed query engine that powers the MongoDB Query Language. This group manages every phase of query processing, including parsing, optimization, plan selection, and execution. Their work also extends to geospatial search and update systems, directly influencing how users interact with and extract insights from their data. Location and work flexibility This Software Engineer III - Query Optimization position is open to candidates based in New York City, Atlanta, Boston, or remotely from the East Coast. MongoDB supports flexible hours to enable collaboration across time zones. The company’s presence spans North America and Europe, with offices in cities such as Dublin, Berlin, Paris, Amsterdam, London, Sofia, Madrid, and Milan. What you will do Design and build core components for a distributed, flexible-schema document database Tackle complex problems in query optimization and execution Enhance data processing efficiency and user experience for transactional, time-series, and analytical workloads Contribute to all stages of query handling, from parsing through execution Why this role This role offers the opportunity to address challenging technical problems that shape how organizations use and analyze data. Collaborate with engineers who value performance and usability, and help define the future of MongoDB’s distributed query capabilities.

The MongoDB Cloud Services Team consists of a diverse group of contributors committed to empowering users to manage MongoDB at a global scale. Our Cloud Team spearheads MongoDB Atlas, our renowned database-as-a-service offering and fastest-growing product, enabling users to deploy fault-tolerant, globally distributed MongoDB clusters within minutes. The Backup Team plays a vital role by delivering essential infrastructure that allows customers to swiftly restore extensive distributed databases to any point in time at the touch of a button. Our mission is to enhance the reliability, speed, and cost-effectiveness of MongoDB backups. This team is responsible for the Backup Agent (developed in Go), the extensive server-side infrastructure (built with Java) that manages hundreds of terabytes of data and processes billions of operations daily, and the user interface (crafted in JavaScript) that customers utilize to oversee their backups. Common project themes include performance optimization, scalability, and user-friendliness.

Join the City of New York as an Associate Engineer in Building Optimization, where you will play a crucial role in enhancing the efficiency of various municipal buildings. This position offers an exciting opportunity to apply engineering principles and contribute to sustainable practices within the city.

Who We AreAt Percepta, our mission is to revolutionize essential sectors through applied AI. We are dedicated to ensuring that key industries, such as healthcare, manufacturing, and energy, leverage cutting-edge technology. By collaborating with industry leaders, we facilitate AI transformation.Expertise in engineering, product development, and research.Mosaic, our proprietary toolkit for swift deployment of agentic workflows.Strategic alliances with companies such as Anthropic, McKinsey, AWS, and others in the General Catalyst portfolio.Our team is rapidly expanding, consisting of Applied AI Engineers, Embedded Product Managers, and Researchers who are passionate about integrating AI advancements into our daily lives. Percepta is a direct partnership with General Catalyst, a global leader in transformation and investment.About the RoleAs a Research Engineer/Scientist (Optimization) at Percepta, you will play a crucial role at the convergence of AI research and impactful real-world applications. You will push the boundaries of decision-making in vital industries by integrating state-of-the-art machine learning with robust optimization research. Collaborate closely with our Embedded Product Managers (EPMs) and engineers to ensure that our advanced decision systems are both innovative and practically beneficial for transforming organizational operations.ResponsibilitiesEstablish and lead ambitious research initiatives that broaden the horizons of data-driven decision-making.Develop innovative optimization and machine learning methodologies for significant challenges such as planning, scheduling, routing, pricing, and inventory management.Create high-fidelity simulators and comprehensive benchmarks that accurately reflect real-world constraints, uncertainties, and multi-objective trade-offs.Translate research into practical applications by partnering with engineers to swiftly prototype solutions and effectively implement research insights.You May Be a Great Fit If YouHold a degree in Computer Science, Operations Research, Industrial Engineering, or Applied Mathematics (MS/PhD preferred) or possess equivalent research or industry experience.Have demonstrated experience in optimization and machine learning.Exhibit a strong ability to collaborate and communicate effectively across multidisciplinary teams.

Join the City of New York as a Senior Engineer in our Building Optimization Team (BOT). In this pivotal role, you will leverage your engineering expertise to optimize energy efficiency in city buildings, contributing to our commitment to sustainability and innovation. You will collaborate with a diverse team of professionals to implement advanced technologies and solutions, ensuring our buildings operate at peak efficiency.

Join the City of New York as an Associate Engineer in Building Optimization, where you will play a crucial role in enhancing the energy efficiency and performance of municipal buildings. This position offers a unique opportunity to work on innovative projects that impact New York City's sustainability goals.

Comity develops financial frameworks aimed at supporting the next generation of energy systems. The team’s mission centers on improving reliability, transparency, and efficiency in energy, with a long-term vision for fully renewable and autonomous systems. Statistical learning and convex optimization form the backbone of their technical approach. The company’s leadership includes Stanford alumni and professionals with expertise in complex systems, machine learning, and structured finance, drawing on experience from organizations such as Apple, Bluevine, Affirm, Square, and Google. Comity is backed by investors including Maverick Ventures and Caffeinated Capital. Offices are located in Chicago, New York City, and San Francisco. Role overview This Quantitative Researcher position centers on portfolio optimization for Comity’s power trading strategies. The role is based in New York. Early team members have a direct hand in shaping portfolio design, research priorities, technology choices, and company culture. What you will do Create information systems to monitor and guide multi-strategy, market-specific autonomous trading systems. Establish acceptance criteria for new trading strategies. Partner with risk management to conduct risk assessments and quantitative risk modeling. Collaborate with software engineers, quantitative researchers, and finance teams to bring new assets to market and reach business objectives. Requirements Experience managing P&L as a quantitative portfolio manager. Strong foundation in applied mathematics, probability, statistics, and numerical algorithms. Knowledge of optimization techniques used in finance. Proficiency in programming, particularly Python. Graduate degree in mathematics, statistics, machine learning, computer science, physics, or a related quantitative discipline. Strong communication and collaboration skills.

At January, we are on a mission to revolutionize consumer finance by infusing humanity into the financial landscape. Our innovative, data-driven solutions empower financial institutions to enhance their collection processes, providing borrowers with clear, compassionate pathways to regain their financial footing. We are not merely increasing access to credit; we are restoring dignity and enabling millions to pursue financial independence.Role OverviewWe are seeking dynamic Senior Software Engineers to play a pivotal role in shaping the future of January’s technology platform. You will have the opportunity to apply to our organization as a whole, allowing us to match you with the team where your unique skills and interests will create the greatest impact.As a Senior Engineer at January, you will do more than just write code. You will take ownership of product outcomes, set the technical direction, and mentor fellow engineers while building systems that enhance the financial well-being of millions.Current teams looking for talent include:Borrower Acquisition: Scaling our communication platforms to ensure that the right borrowers receive the right message at the right time.Borrower Activation: Developing features in the Borrower Portal that assist individuals in resolving their accounts and achieving financial stability.Compliance and Money Operations: Ensuring our financial systems are accurate, scalable, and compliant while facilitating efficient money movement at scale.Your ResponsibilitiesDesign and implement highly scalable systems that serve millions of borrowers and financial partners.Contribute to architectural design and roadmap planning, shaping the direction of core projects.Lead by example through engineering excellence, advocating for best practices and maintaining high code quality.Mentor junior engineers to enhance the team's skills and capabilities.Collaborate across departments, working closely with Product, Design, and Operations to deliver impactful solutions.Propose and refine company-wide engineering processes in collaboration with other senior leaders.Qualifications5+ years of professional software development experience.Strong technical proficiency (experience in Python, React, Postgres, AWS is desirable; we welcome diverse backgrounds and are willing to teach these technologies).Exceptional problem-solving abilities and a passion for creating impactful solutions.Experience in designing and implementing scalable systems.Excellent communication skills with the ability to collaborate effectively across teams.

Playground builds software to help child care providers manage their businesses more efficiently. The platform supports thousands of schools across the United States, with a focus on making high-quality child care more accessible. The company has secured millions in funding and holds several statewide contracts, reflecting strong momentum in the education technology space. Playground’s founders have been recognized on the Forbes 30 Under 30 list for their work in child care technology. The team values a culture where ownership and collaboration are central. Engineers at Playground regularly work together on challenging projects that have a direct impact on customers and the broader child care sector. Role overview This Staff Software Engineer position is based in New York City. The role centers on building and improving Playground’s core products as the company grows. Engineers here contribute to significant technical decisions and help shape the future of the platform. What you will do Work on complex software projects that support child care businesses nationwide Collaborate closely with other engineers and teams to deliver high-impact solutions Take ownership of technical challenges and contribute to a culture of shared responsibility Requirements Experience leading or contributing to large-scale software projects Ability to work effectively in a collaborative, team-driven environment Based in or willing to work from New York City

Join a Trailblazer in Conversation IntelligenceAt Rilla, we are pioneering the future of conversation intelligence software tailored for offline commerce. Our innovative platform meticulously records, analyzes, and indexes conversations, delivering exceptional insights that empower critical physical businesses—the backbone of our economy.Our mission? To equip traditional industries with cutting-edge technologies that have propelled the most innovative companies of the 21st century. This vision has catapulted Rilla into one of the fastest-growing companies in history, achieving a remarkable growth trajectory from $0 to $40M in just 3.5 years, maintaining a 15% month-on-month growth rate, boasting a net revenue retention above 170%, an NPS that surpasses that of the iPhone, and achieving profitability.Your RoleAs a Senior Software Engineer at Rilla, you will be at the forefront of our engineering efforts, architecting and deploying features across the entire stack with unparalleled speed. Daily, you will develop end-to-end workflows, transition them into production, and tackle real-world challenges at a grand scale.In this pivotal role, you will set the standard for code quality and decision-making, fostering a world-class engineering culture as we scale. As Rilla expands tenfold, your responsibilities and influence will grow correspondingly, as you build the tools, frameworks, and platforms that empower both you and Rilla to thrive exponentially.Are you someone who thrives on obsession? Do you dream of becoming a founder or a leader, harnessing AI to revolutionize the physical world? We believe that Rilla is the ideal environment for you to learn and grow alongside the best peers in the industry.Technologies We LeverageA variety of languages and frameworks such as React, React Native, TypeScript, and Python.Open-source technologies including Node.js, PostgreSQL, Turborepo, Lodash, and Zod.Standard industry build tools like GitHub Actions, Terraform, and Spacelift.Our Core ValuesAn infinite learner who is perpetually curious.A customer-centric individual who prioritizes truly solving customer pain points over superficial metrics.A team player with a winning mindset, embracing accountability, collaborative learning, and constructive feedback.Deep empathy for our customers, recognizing that they operate in the real world and require understanding to devise effective solutions.Fearless in the face of failure, viewing risks as opportunities for growth and improvement.

Join Baton Technologies, a cutting-edge software development firm based in the heart of New York City, as a Software Engineer. We are on the lookout for innovative and talented individuals who are passionate about building scalable software solutions that deliver exceptional user experiences.As a Software Engineer, you will work collaboratively with cross-functional teams to design, develop, and maintain software applications while leveraging modern programming languages and technologies. You will have the opportunity to contribute to various phases of the software development lifecycle, from concept through implementation and deployment.

Join OuterSignal as a Founding Software EngineerAt OuterSignal, we are pioneering the customer intelligence layer for commerce. While brands track orders, they often miss the larger picture, seeing only about 5% of the complete narrative. We provide insights into the remaining 95%, revealing not just who purchased, but also key information about those individuals — including executives, influencers, journalists, retail buyers, investors, and loyal customers who can become a brand’s strongest advocates. Our innovative platform enhances every order in real-time with both professional and personal signals, enabling smarter outreach, improved analytics, and better business development leads. In just six months, we've partnered with over 150 brands and are experiencing a monthly growth rate of 50%. Our small, high-performing team is committed to building a category-defining platform for e-commerce customer intelligence, supported by a world-class group of investors.Your Responsibilities:Design and manage core systems that handle millions of orders via APIs and LLM pipelines.Develop queue-based microservices utilizing Redis, Node.js, TypeScript, PostgreSQL, Docker/Kubernetes, and Vercel.Integrate vector databases and RAG pipelines to enhance customer profiles, making them smarter, faster, and more searchable in real-time.Deliver features end-to-end: from APIs to dashboards and integrations (including Shopify, Klaviyo, Slack, Zapier, and Gorgias).Ensure compliance with privacy regulations and best practices.Collaborate closely with the founding team on product vision, roadmap, and future hiring of engineers.Your Profile:5+ years of engineering experience, particularly in backend infrastructure and distributed systems.Proven experience in a fast-paced startup environment or a strong willingness to adapt to dynamic work conditions.Proficient in JavaScript/TypeScript (Node), with additional familiarity in Python and Machine Learning being a plus.Experience with vector databases (such as Pinecone, Weaviate, pgvector) and RAG architectures.Comfortable designing schemas and scaling PostgreSQL databases.Bonus if you have experience building applications around LLMs, Shopify, or data privacy frameworks.Above all, you desire ownership of your work. You thrive in rapid development environments, enjoy tackling complex challenges, and are not deterred by the chaos that often accompanies early-stage projects.

About FarsightFarsight is a pioneering AI platform tailored for the financial services sector, revolutionizing how investment banks and private equity firms automate intricate workflows. Currently, financial institutions spend around 80% of their time manually gathering information and drafting materials before refining their presentations, models, and pitches. Our solutions not only reclaim that valuable time but also enhance their outputs with insights that would be unattainable without our advanced financial AI technology.We process vast amounts of both public and private data, ensuring the delivery of precise and auditable materials in a complex landscape where traditional AI struggles. Regularly, our product produces results that exceed the capabilities of current employees, with clients expressing satisfaction such as:“I’m more than willing to let my analysts never use Powerpoint again.”“We pay consultants millions annually to guide our AI strategies. They have no idea what Farsight is capable of.”Our mission is to transform the operational landscape of financial services, effectively interweaving AI into the essential fabric of every corporation worldwide.TeamWe are an enthusiastic team committed to crafting technology that inspires. Each member contributes in various roles, including development, sales, infrastructure, design, product innovation, and AI research. We expect new hires to possess the experience or passion to take on diverse responsibilities.Our team boasts a rich background from top financial institutions such as Evercore, General Atlantic, and Menlo Ventures, combined with robust engineering and AI expertise from companies like Amazon, Hugging Face, and the MIT Media Lab. Having learned the intricacies of building successful startups as founders and founding engineers, we prioritize attracting the best talent to elevate our company further.Our operations are entirely based in Manhattan, New York City, with in-person attendance required four days a week (Fridays are remote).

Traba connects businesses with skilled industrial workers through technology designed to streamline labor management and improve supply chain efficiency. The company offers mobile apps for workers and businesses, along with web platforms for clients and internal teams. Backed by investors such as Founders Fund, Khosla Ventures, and General Catalyst, Traba is focused on building solutions that help organizations operate more effectively. Role overview The Senior Software Engineer joins Traba’s founding team in New York City. This position involves hands-on development for both mobile and web applications, supporting products used by workers, business clients, and internal teams. Working closely with the CTO, the engineer will help shape the technical architecture and influence the product roadmap, contributing to a scalable technology platform for the future. What you will do Develop and maintain mobile applications for workers and business users Build and enhance web platforms for business clients and internal operations Collaborate with the CTO on architectural decisions and long-term technical planning Help define and refine the product roadmap Contribute to building a technology platform that supports growth and scalability Location This position is based in New York City, NY.

Join Our Innovative Team at GarageAt Garage, we are dedicated to revolutionizing the way essential vehicles—such as firetrucks—and critical equipment are delivered to the communities that rely on them. Our AI-driven marketplace transforms lengthy manual processes into efficient, rapid solutions, ensuring that vital resources reach those in need swiftly and effectively. By improving operational efficiency, we not only safeguard communities but also conserve taxpayer funds while bolstering key industries that uphold America's infrastructure.With $18M in funding from notable investors such as Y Combinator, Initialized Capital, Infinity Ventures, and FJ Labs, we are poised for significant growth.Your RoleAs a member of our agile team, you will work closely with the founders on impactful projects that matter. We prioritize user experience and are committed to delivering products that make a difference. In your role as a software engineer, you will have the chance to influence product strategy and create systems that facilitate the movement of real equipment and vehicles nationwide.Your ResponsibilitiesLead the development and management of core systems within our marketplace and transaction infrastructureAutomate intricate workflows involving payments, logistics, compliance, and financingCraft APIs, data models, and services designed for large-scale asset movementCollaborate with product and operations teams to ensure rapid and reliable deploymentYour ProfileYou bring at least 2 years of professional software engineering experience, with a strong command of TypeScript. Your thinking is driven by a product-oriented and systems-based approach, favoring straightforward and dependable solutions. You are passionate about developing software that has a tangible impact on the world.What We ProvideAttractive salary with stock optionsComprehensive health, dental, and vision insurance for you and your dependentsDaily catered lunches at our New York City officeUnlimited paid time off each year$100 monthly wellness stipendBi-annual team retreatsOpportunity to innovate one of the largest and most antiquated marketplaces

The Atlas Growth team is a dedicated group of cloud engineers committed to supporting our customers throughout their application development journey. We handle everything from cluster configuration and data modeling to load testing and managing production workloads at scale. Utilizing our proprietary experiments platform, we validate new features rapidly, ensuring that we only release enhancements that benefit our users. Our engineers collaborate in cross-functional squads consisting of product, design, analytics, and research teams, all focused on achieving specific performance metrics such as retention.Atlas Growth 2 is responsible for creating customer-facing features within the Atlas platform and works alongside other teams within the Growth engineering division. Recent initiatives have included developing an AI Chatbot for cluster creation, implementing a recommendation system for improved database performance, and designing a pricing page optimized for conversion rates.This role is based in our New York City office and supports both our Flexible and In-Office working models.

Reddit is a vibrant ecosystem of communities centered around shared interests, fostering authentic conversations that matter. With over 100,000 active communities and approximately 116 million daily unique visitors, Reddit stands as one of the premier platforms for information exchange on the internet. To learn more, please visit www.redditinc.com.The Quality Engineering (QE) team at Reddit is in search of a talented Senior Software Engineer to join our Android Test Engineering group. In this role, you will collaborate closely with cross-functional teams to design and develop innovative tools and comprehensive testing frameworks that uphold the highest quality standards. Our mission is to empower all engineering teams at Reddit by providing robust testing solutions that drive quality across the software development lifecycle.

Join the Foundational Team at RillaRilla is revolutionizing the way we index the offline world. We have developed the premier sales coaching software tailored for organizations that conduct sales in-person. With over 1000 clients, including industry giants such as The Home Depot, KKR, Neighborly, and PulteGroup, our platform empowers AI-driven sales coaching across their operations.Supported by leading investors including Google Ventures, Bessemer Ventures, Crew Capital, and Broom Ventures, Rilla is an in-office team based in New York City. Our dynamic team operates with the speed and adaptability of high-performance learners, driven by a deep commitment to our customers and a passion for maximizing our real-world impact.If you're eager to develop products and systems that capture and index billions of real-world conversations, Rilla is the perfect place for you.Your RoleWe are establishing a new Platform team, and we are looking for one of the inaugural hires. You will collaborate closely with the platform team lead to shape how Rilla constructs, deploys, monitors, and scales its infrastructure.Your responsibilities will span the entire platform architecture: CI/CD pipelines, Terraform modules, monitoring stacks, SSO integrations, and the API infrastructure crucial for our client operations. If it ensures our product’s functionality and allows engineers to deploy seamlessly, it falls under your purview.You will engage in coding, system design, and architectural decision-making, effectively constructing the platform relied upon by our expanding engineering team of over 25 members. You will take ownership from initial concept to delivering production systems that serve thousands of customers.We welcome engineers of all experience levels; what counts is your relentless resourcefulness, strong technical skills, and enthusiasm for building from the ground up.Do you consider yourself 'obsessive' in your craft? Do you want to define the infrastructure for one of the fastest-growing startups in history? Then Rilla is the ideal environment for you to thrive.

Role overview arch.co seeks a Staff Software Engineer to join the team in New York City. The role centers on designing and building software that advances the company’s mission. Collaboration with colleagues from various teams is a regular part of the work, with a focus on delivering solutions that have real impact. What you will do Plan and develop software features in partnership with cross-functional teams Design new systems and enhance those already in place Apply technical expertise to projects that influence the company’s direction Location This role is based in New York City.