Principal Software Engineer - Java

The future of artificial intelligence — whether in training or evaluation, classical machine learning or agentic workflows — begins with exceptional data.At HumanSignal, we are developing a pioneering platform that facilitates the creation, curation, and assessment of this critical data. Our tools enable leading AI teams to fine-tune foundational models and validate agent behaviors in production, ensuring that models are based on real-world signals rather than mere noise.Our open-source product, Label Studio, has emerged as the de facto standard for data labeling and evaluation across various modalities including text, images, time series, and agents-in-environments. With over 250,000 users and hundreds of millions of labeled samples, it is the most widely adopted open-source solution for teams engaged in building AI systems.Label Studio Enterprise enhances this momentum by providing the security, collaboration, and scalability features essential for supporting mission-critical AI pipelines — from model training datasets to evaluation test sets and continuous feedback loops. We began our journey before foundational models became mainstream, and we are intensifying our efforts now that AI is transforming the world. If you're passionate about assisting leading AI teams in building smarter, more precise systems, we want to hear from you.About UsHumanSignal develops Label Studio Enterprise, the trusted data annotation platform utilized by Fortune 500 companies like Apple. We are expanding our team at our Columbus facility, which currently has over 400 members, and we are seeking engineering talent to help create systems that power AI training pipelines.What You’ll BuildFull-stack web applications for crowdsourced data collection with integrated quality control workflowsAdmin dashboards featuring bulk operations, analytics, and workflow managementData pipelines that integrate Label Studio, AWS S3, and automated quality checksJSON transformation systems that handle thousands of annotation files for enterprise clients

Speechify’s mission is to remove reading as a barrier to learning. Over 50 million people use our text-to-speech tools to turn books, PDFs, Google Docs, news, and websites into audio. Our products include iOS and Android apps, a Mac app, a Chrome extension, and a web app. Speechify has earned recognition from Google as Chrome Extension of the Year and received Apple’s 2025 Design Award for Inclusivity. Our fully distributed team includes nearly 200 professionals, from engineers to AI researchers, with backgrounds at Amazon, Microsoft, Google, Stripe, Vercel, and Bolt. Collaboration happens across time zones and continents. Role Overview This Software Engineer, Data Infrastructure & Acquisition role sits within the AI team. The focus: oversee data collection and infrastructure to support model training. The team builds large, high-quality datasets at petabyte scale while keeping costs low. The work blends infrastructure, engineering, and research. Candidates who care deeply about data engineering and AI will find meaningful challenges here. What You Will Do Find and evaluate new audio data sources, then integrate them into the ingestion pipeline. Maintain and scale cloud infrastructure for data ingestion, using GCP and Terraform. Work with scientists to balance cost, throughput, and data quality, delivering better datasets for model development. Partner with the AI team and leadership to shape a dataset roadmap for future Speechify products. What We Look For Bachelor’s, Master’s, or PhD in Computer Science or a related field. At least 5 years of software development experience. Strong skills in bash and Python scripting in Linux environments. Hands-on experience with Docker and Infrastructure-as-Code (such as Terraform), plus experience with a major cloud provider (GCP preferred). Familiarity with web crawlers and large-scale data processing is a plus. Comfort managing multiple priorities and shifting demands. Clear communication skills, both written and spoken. Location: Columbus, OH, USA (remote team, distributed worldwide).

Join Path RoboticsAt Path Robotics, we are transforming the landscape of autonomous welding. Our innovative AI-driven robotic welding systems leverage advanced sensing and computer vision technologies to adapt in real time — eliminating the need for fixtures, programming, and operational limits. Join us in shaping the future of manufacturing as we seek passionate engineers eager to dive into hands-on work.Your RoleWe are in search of a Software Engineer to develop and sustain the infrastructure that underpins our AI and machine learning workflows. This position acts as a vital link between our AI research team and production — crafting the tools, pipelines, and deployment systems necessary to transition models from experimental stages to the factory floor. Ideal candidates are system thinkers fluent in ML, capable of understanding researchers' needs and constructing reliable software solutions around them.Your ResponsibilitiesDesign and maintain the software infrastructure that supports robotic learning, encompassing model training, experiment tracking, version control, and deployment.Create pipelines and tools for the collection, processing, and curation of extensive robotic sensor and telemetry data.Facilitate the deployment of AI models onto robotic systems, including simulation, hardware integration, runtime monitoring, and feedback loops derived from field data.Develop internal tools that expedite AI engineering workflows related to dataset exploration, testing, evaluation, and productionization.Collaborate closely with AI researchers and robotics engineers to translate model requirements into robust, scalable software systems.Your Profile3–6 years of experience in software engineering, with strong exposure to ML infrastructure, MLOps, or AI systems.Proficient in writing production-level software in Python, with additional familiarity in C++, ROS, or robotics software stacks preferred.Experience with PyTorch and a solid grasp of the software systems necessary for AI model development.Comfortable working with data pipelines, simulation environments, containerized workflows, and GPU computing within Linux environments.Enthusiastic about collaborating across AI and robotics domains.

About Us:Established in 2018 and based in Columbus, Ohio, Foxen is at the forefront of delivering cutting-edge insurance compliance solutions and financial services tailored to benefit property owners, managers, and residents within the multifamily real estate sector. Our diverse team consists of skilled technologists, insurance and finance experts, and seasoned property management professionals. By harnessing our collective expertise and fostering collaboration, we create technology-driven solutions that effectively address our clients' challenges. Foxen's innovative products aim to transform outdated processes, enhance property revenue, and promote financial well-being for residents.Join Our Team: Foxen is proud to be recognized on Inc.’s 2025 Best Places to Work list, reflecting the vibrant culture we are cultivating as we expand. We are in a phase of rapid growth and seek individuals eager to contribute to something remarkable. Discover more about our team at foxen.com/about-us.Your Role:As a Staff Software Engineer at Foxen, you will be a pivotal technical leader, acting as a co-founder in our next phase of innovation. You will spearhead the creation of our next AI-driven revenue initiative while establishing the technical framework and engineering standards that will shape Foxen's future. This role transcends traditional engineering; you will be an architect, innovator, and technical authority who transforms visionary concepts into market-leading products.Working closely with Product leadership, you will convert visionary ideas into intelligent, scalable solutions leveraging AI to create unprecedented value for our customers. You will enjoy autonomy and ownership, making critical technical choices that will guide the company's strategic direction. Your contributions will have a direct impact on Foxen's growth, competitive edge, and capacity to revolutionize the multifamily real estate industry.Key Areas of Impact:AI-Powered Product Innovation & Development• Design and develop Foxen's next-generation AI-enhanced product lineup from inception.• Collaborate with Product teams to assess technical feasibility, architecture, and execution strategies for AI-oriented features.• Establish best practices for responsible AI development, encompassing model selection, assessment, monitoring, and ongoing enhancement.• Create intelligent systems that build upon our existing platform while introducing new capabilities.

Cologix seeks a Data Center Operations Manager to oversee daily operations at its Columbus, OH facility. The position centers on keeping the data center’s infrastructure running smoothly and reliably. Key responsibilities Lead and support a team of data center professionals Maintain efficient and dependable facility operations Drive improvements in operational processes and service delivery Promote a culture focused on safety and continuous improvement Work environment This role is based on site in Columbus, OH. The team values practical solutions, collaboration, and fresh perspectives to strengthen both operations and workplace culture.

We are looking for a meticulous and proactive Internal Operations Specialist to join the Togetherwork team in Columbus, GA. This hybrid position requires you to be in the office three days a week. In this role, you'll play a vital part in managing various internal operational functions such as customer account receivables, contract management, and product lifecycle management. Your ability to foster strong relationships with customers, vendors, and team members will be essential to our success.

Cologix is seeking a Data Center Operations Technician for the 3rd shift at its Columbus, OH facility. This role is central to the daily functioning of a busy colocation environment, supporting both customer requests and ongoing operational needs. Role overview The technician serves as the main hands-on resource for a range of operational tasks. Responsibilities include providing remote hands services, supporting structured cabling and interconnections, validating physical layers, and responding to alarms. The position also involves monitoring data center operations and ensuring all activities follow established procedures. What you will do Handle customer and carrier requests, including cross-connect installations and cable testing Perform equipment verifications, server reboots, and visual inspections Update documentation and carry out operational response tasks Monitor alarms and conduct routine checks throughout the data center Maintain organized and secure technical spaces Escalate issues as needed, following operational guidelines Schedule This is a 3rd shift position, working Sunday through Wednesday from 10:00 PM to 8:00 AM. What matters here Attention to detail and professionalism in all tasks Strong judgment and the ability to work independently within set boundaries Commitment to keeping customer activities and data center functions running smoothly

Join our team as a Geotechnical Lab Engineer Intern at ANS, where you will play a vital role in bolstering our geotechnical engineering projects. In this position, you will conduct soil testing at our state-of-the-art in-house geotechnical laboratory. Your responsibilities will include sample preparation, performing tests in accordance with industry standards, and ensuring the maintenance of your workstation. Attention to detail and strict compliance with testing protocols are essential as you contribute to the successful execution of our geotechnical projects. This internship is ideal for candidates who are expected to graduate by Fall 2025 or Spring 2026. You will gain hands-on experience in a collaborative lab setting, and high-performing interns may be considered for full-time opportunities post-graduation, especially those who are committed to a career in geotechnical engineering.

At CapTech, our Machine Learning Engineers play a pivotal role in devising and executing data-centric solutions tailored to our clients' needs. With a strong emphasis on constructing and deploying scalable machine learning systems within enterprise landscapes, you will thrive in a collaborative environment. Here, you will have ample opportunities to learn and share insights with fellow analysts, architects, and our esteemed clients.Your key responsibilities as a Machine Learning Engineer will encompass:Collaborating with clients, data scientists, engineers, and cross-functional teams to design and deliver comprehensive machine learning solutions while exploring innovative data science strategies to fulfill business objectives.Breaking down client needs into actionable data-driven processes and analytical frameworks.Processing and transforming extensive datasets hosted on leading enterprise data platforms such as AWS, Azure, and GCP.Crafting, developing, and launching advanced analytical solutions utilizing client data, including recommender systems, natural language processing tools, and risk assessments.Optimizing and scaling machine learning systems to meet client specifications.Enhancing CapTech’s Machine Learning and Data Science practices by delivering impactful client presentations, drafting proposals, participating in business development activities, and mentoring junior data scientists and engineers.

About Cologix:Cologix, headquartered in Denver, Colorado, stands out as a premier network-neutral interconnection and hyperscale edge data center provider in North America. Our expansive platform offers customers access to over 45 digital edge and Scalelogix℠ hyperscale edge data centers across 13 markets in the United States and Canada. We feature a carrier-rich ecosystem with more than 710 networks, over 360 cloud providers, 35+ onramps, and seven Internet exchanges. Our commitment to operational excellence translates into strong partnerships with nearly 2,000 customers, facilitated by exceptional local support and unparalleled customer service. Supported by one of the largest infrastructure funds in North America, Cologix nurtures a culture that prioritizes our team, our environment, and our clients through dedicated leadership, certified professionals, and a strong commitment to ESG initiatives.Position OverviewWe are in search of a Data Center Operations Manager to oversee 24/7 operations at our Columbus data center facilities. This pivotal role ensures the safe, reliable, and compliant management of mission-critical environments while cultivating and guiding a high-performance operations team.The Data Center Operations Manager is responsible for the disciplined application of operational standards, structured change management, robust interconnection governance, and reliable site readiness across electrical, mechanical, and telecommunications domains. This leader collaborates closely with Infrastructure, Engineering, IT, Security, and cross-functional teams to achieve industry-leading uptime and customer satisfaction.To excel in this role, candidates must possess strong technical knowledge, operational discipline, and the ability to lead and develop non-exempt personnel across various shifts in a 24/7 operational environment.

The future of artificial intelligence, whether in training or evaluation, classical machine learning, or agentic workflows, hinges on the availability of high-quality data.At HumanSignal, we are developing a groundbreaking platform that facilitates the creation, curation, and evaluation of this crucial data. Our tools are utilized by top AI teams for tasks ranging from fine-tuning foundational models to validating agent behaviors in production, ensuring that models are grounded in genuine signals rather than noise.Our open-source product, Label Studio, has emerged as the de facto standard for data labeling and evaluation across diverse modalities—from text and images to time series and agents in environments. With over 250,000 users and hundreds of millions of labeled samples, it stands as the most widely adopted open-source solution for teams dedicated to building AI systems.Label Studio Enterprise enhances this foundation with security, collaboration, and scalability features essential for mission-critical AI pipelines—supporting everything from model training datasets to evaluation test sets and continuous feedback loops. We began our journey before foundation models became mainstream, and we are now intensifying our efforts as AI transforms the world. If you're enthusiastic about assisting leading AI teams in building smarter, more precise systems, we would be thrilled to connect.HumanSignal is at the forefront of revolutionizing how the most advanced AI systems are constructed. As the creators of Label Studio, the world's most adaptable data labeling platform, and through our newly established HumanSignal Services division (following our recent acquisition of Erud AI), we are pioneering the production of purpose-built datasets that drive breakthrough AI applications.Our mission is straightforward: leverage human intelligence to fuel the future of AI. We collaborate with cutting-edge labs and the world’s largest enterprises to eliminate data bottlenecks and foster innovation at speed. Through our Data Creation Laboratories, we don’t merely label data—we manufacture it from the ground up in controlled environments, creating the innovative datasets that novel AI applications require.

Cologix is looking for a Data Center Operations Technician based in Columbus, OH. This role supports the daily operation of the data center, focusing on system monitoring and technical troubleshooting to ensure reliable performance. Key responsibilities Monitor data center systems to track performance and maintain reliability Troubleshoot technical issues as they occur Apply solutions that help improve operational efficiency Role overview This position centers on maintaining smooth and dependable data center operations. The technician will respond to technical problems and work to keep systems functioning at a high standard.

Join CompassX, a premier boutique consulting firm, as a Data Architect specializing in AI Integration and Deployment. Our mission is to empower Fortune 500 and high-growth clients in executing their most pivotal initiatives, ranging from enterprise transformations to cutting-edge digital and data-driven projects.With over 15 years of industry excellence, we have successfully partnered with diverse sectors, including financial services, pharmaceuticals, aerospace, consumer products, and quick-service restaurants. Proudly recognized as a three-time winner of Consulting Magazine’s Best Boutique Firms, we have also been honored as a “Best Place to Work” in Southern California and listed among INC.’s 5000 fastest-growing private companies in the U.S.As a Data Architect, you will be both a hands-on builder and a trusted strategic advisor. Your role will involve diving deep into the intricacies of data pipelines, working with modern lakehouse platforms, and AI-native application stacks, while also providing valuable insights to our senior client teams regarding their data strategies. Your expertise will be crucial in bridging the gap between our delivery team and the client's data and engineering stakeholders.We're particularly interested in candidates based in Georgia for occasional co-location with our team, and expect some travel to client sites.

Cologix is hiring a Data Center Operations Technician for the 2nd Shift at our Columbus, OH facility. This role supports daily operations and customer activity in a 24/7 colocation environment. Role overview This position focuses on hands-on operational support for our data center. The technician will handle customer requests, provide remote hands services, and assist with structured cabling and interconnection tasks. Responsibilities also include physical-layer validation, alarm monitoring, and maintaining organized technical spaces. Key responsibilities Facilitate customer and carrier requests, including cross-connect installations and cable testing Perform equipment checks, server reboots, and visual inspections Update documentation and respond to operational tasks as needed Monitor alarms, conduct rounds and readings, and escalate issues following established procedures Schedule 2nd Shift: Sunday through Wednesday, 2:00 PM to 12:00 AM This role requires precision, professionalism, and sound judgment. The technician will serve as a key resource to ensure seamless operations and customer support within the data center.

The future of AI — whether in training or evaluation, classical ML or agentic workflows — starts with high-quality data.At HumanSignal, we are creating the platform that empowers the generation, curation, and assessment of high-quality data. Our tools are utilized by top AI teams to ensure that models are firmly based on real-world signals rather than noise.Our open-source product, Label Studio, has established itself as the standard for data labeling and evaluation across various modalities — from text and images to time series and agents in environments. With over 250,000 users and hundreds of millions of labeled samples, it is the most widely adopted OSS solution for teams focused on building AI systems.Label Studio Enterprise enhances this foundation with the security, collaboration, and scalability features necessary to support mission-critical AI pipelines — facilitating everything from model training datasets to evaluation test sets and continuous feedback loops. We began our journey before foundation models became mainstream, and we are intensifying our focus now that AI is transforming the world. If you are eager to assist leading AI teams in developing smarter and more precise systems, we would love to connect.HumanSignal is at the forefront of revolutionizing how the world's most advanced AI systems are constructed. As the creators of Label Studio, the world's most adaptable data labeling platform, and through our newly established HumanSignal Services division (following our recent acquisition of Erud AI), we are spearheading the creation of purpose-built datasets that drive breakthrough AI applications.Our mission is straightforward: leverage human intelligence to fuel the future of AI. We collaborate with groundbreaking labs and the largest enterprises globally to eliminate data bottlenecks and enable rapid innovation. Through our Data Creation Laboratories, we go beyond just labeling data—we produce it from the ground up in controlled environments, crafting the innovative datasets that next-generation AI applications require.

Cologix seeks a Data Center Operations Technician for the 2nd shift (Wednesday through Saturday, 2:00pm to 12:00am) in Columbus, OH. This role supports daily operations and customer activities in a 24/7 colocation environment. Role overview This position focuses on hands-on support within the data center. The technician assists with customer requests, provides remote hands services, and ensures smooth operational monitoring. Tasks include structured cabling, interconnection support, physical-layer validation, and alarm response. Maintaining a clean and organized technical space is also part of the job. What you will do Install cross-connects and perform cable testing for customer and carrier environments Check equipment, reboot servers, and conduct visual inspections as needed Update documentation and respond to operational issues Monitor alarms, conduct rounds and readings, and escalate issues following procedures Maintain technical spaces to company standards What we look for Attention to detail and professionalism in a highly visible setting Ability to follow defined procedures and stay within domain boundaries Sound judgment and reliability during shift hours This position is part of a team that values precision, strong partnerships, and excellent customer service in a network-neutral data center environment.

The future of artificial intelligence — whether in training or evaluation, classical machine learning or agentic workflows — hinges on high-quality data.At HumanSignal, we are dedicated to developing the platform that facilitates the creation, curation, and evaluation of this critical data. Our tools are employed by top-tier AI teams to ensure models are built on real-world signals rather than noise, from fine-tuning foundational models to validating agent behaviors in production environments.Our open-source product, Label Studio, has emerged as the industry standard for data labeling and evaluation across various modalities — encompassing text, images, time series, and agent-environment interactions. With over 250,000 users and hundreds of millions of labeled samples, it stands as the most widely adopted open-source solution for teams focused on AI system development.Label Studio Enterprise extends this success with enhanced security, collaboration, and scalability features necessary for supporting mission-critical AI pipelines, ranging from model training datasets to evaluation test sets and continuous feedback loops. We were pioneers before foundational models became mainstream, and as AI continues to transform industries, we are eager to expand our mission. If you are passionate about assisting leading AI teams in building smarter, more accurate systems, we would love to hear from you.About the RoleThis role is tailor-made for individuals with an entrepreneurial spirit.We seek a candidate who thrives in a startup environment, leading our Columbus data collection facility. You should derive energy from building initiatives from the ground up, be flexible with job titles, and desire to engage in the most significant technological shift of our era.In this role, you will oversee daily operations, manage project delivery, recruit top talent, and tackle challenges that lack established playbooks. Expect to handle tasks that may not seem glamorous but are essential for the functioning of a real business — coordinating schedules, managing compliance paperwork, developing tracking systems, and stepping in when issues arise. If this sounds daunting, this role may not be for you. If it excites you and represents an opportunity for growth, we encourage you to continue reading.

Cologix is seeking a Data Center Operations Technician for the 1st shift at its Columbus, OH location. This role is central to supporting daily operations and customer requests in a 24x7 colocation data center environment. Role overview This position focuses on executing operational tasks with precision and professionalism. The technician serves as the primary resource for services such as remote hands support, structured cabling, interconnection assistance, physical-layer validation, alarm monitoring, and operational oversight within the data center. What you will do Respond to customer and carrier requests, including cross-connect installations, cable testing, equipment checks, server reboots, and visual inspections Update documentation and perform operational response tasks as needed Monitor alarms, conduct facility rounds and readings, and maintain clean, organized technical spaces Escalate issues appropriately, following established procedures and boundaries Shift details This is a 1st shift role, scheduled Wednesday through Saturday from 6:00am to 4:00pm.

About Speechify Speechify helps people access information in ways that fit their lives. The platform turns articles, documents, and books into audio, letting users learn and absorb content at their own pace. As a leader in this space, Speechify continues to grow quickly and shape how audio information is consumed, much like streaming services have changed audio entertainment. Role Overview The Core Experiences Team at Speechify is looking for a Senior Software Engineer in Columbus, OH. This role focuses on building and maintaining the core services and SDKs that support Speechify’s product across multiple platforms. The work blends product innovation with infrastructure, emphasizing the creation of reliable APIs and systems that improve the user experience. What You Will Do Work closely with Product Teams to define project scopes and streamline processes, aiming for faster customer feedback. Balance integration and user experience trade-offs to deliver cross-platform solutions through the Speechify SDK. Improve existing features by refining algorithms and designing efficient abstractions for quicker loading and smarter parsing. Deploy cloud functions, lightweight backend services, and scheduled jobs using Kotlin.