Senior Software Engineer - APIs & Integrations

Integrate develops program management software for complex hardware projects, serving organizations in deep tech sectors like aerospace, robotics, and autonomous vehicles. The platform connects vendors, customers, and partners to streamline collaboration across company boundaries. By reducing manual work and communication barriers, Integrate supports teams working on demanding technical challenges. The company addresses the unique needs of hardware development, where traditional software often falls short. Integrate's solutions focus on improving coordination and communication for both internal teams and external stakeholders, helping organizations innovate more quickly and reliably. Role overview The Senior Backend Engineer will focus on building and scaling the infrastructure layer of Integrate’s platform. This position centers on new development, not maintenance. The work involves tackling distributed systems challenges, large-scale data federation, and architectural design to support an expanding customer base. Engineers at Integrate collaborate closely, make decisions quickly, and value technical rigor. Experience with large-scale systems, such as cloud migrations, distributed data pipelines, microservices, or event-driven architectures, is especially relevant for this role. Key responsibilities Design and scale distributed backend systems that process high-throughput, real-time data with complex dependencies. Profile and debug Go and Rust services to resolve performance issues. Contribute to data federation architecture, including S3 integration, graduation pipelines, and downstream data services. Develop and refine gRPC service interfaces and REST/JSON APIs for both internal and external use. Work with SQL and NoSQL databases, focusing on schema design, query optimization, and ensuring data durability. Collaborate with platform engineers and technical leads on infrastructure decisions. Instrument, monitor, and debug production systems, including participation in on-call rotations, root cause analysis, and incident management. Tech stack Main development uses Go, with Python for tooling and data workflows. The stack includes gRPC, REST/JSON, GraphQL, PostgreSQL, NoSQL databases, and Kubernetes-managed infrastructure. Infrastructure as code is managed with Terraform. Location This position is based in Seattle, WA.

About UsHigharc is an innovative, venture capital-backed startup revolutionizing the design and construction of new homes. Join our founding team, comprised of former product developers from industry giants such as Autodesk, Electronic Arts, Nike, and Apple. We have successfully raised $83 million, backed by leading venture capital firms and over 18 strategic investors who are leaders in construction, building products manufacturing, and distribution.We are in search of a seasoned Senior Full Stack Software Engineer to advance the technical direction of our B2B platform’s integrations, particularly with customer ERP systems. This pivotal role demands not only exceptional engineering capabilities but also the architectural vision to design and oversee robust, scalable integration patterns across diverse customer environments, many of which present inconsistent API support.

Join Greenfield Engineering, a Saalex Company, as a Senior Software Integration Engineer in Patuxent River, MD. In this pivotal role, you will leverage your system software engineering expertise to support the Integrated Product Team (IPT) in fulfilling the requirements and objectives of the VH-92A Program.Position Type: Full-TimeSalary: $125K - $150K annually (commensurate with experience)Work Location: Primarily onsite (details on onsite requirements below)**On-site Requirements: This position necessitates full-time onsite presence at the VH Facility in Patuxent River, MD, with potential eligibility for recurring telework. However, an onsite presence of 85% or more during the workweek is mandatory.Key Responsibilities:Deliver technical guidance and support to IPT members, identifying risks and issues while providing strategic recommendations for software and hardware product development.Prepare, review, and manage technical documentation including proposals, investigations, and analyses to support Engineering Change Proposals (ECPs) and Product Test Verifications.Guide the development of in-house sustainment for software and processes, enhancing operational efficiency.Identify and track software discrepancies, contributing to mission systems upgrades.Employ engineering principles to analyze, plan, design, and implement military weapons systems.Conduct thorough reviews and prepare engineering and technical analyses, reports, and change proposals.Utilize engineering expertise for system integration, configuration management, quality assurance testing, and resource management.Analyze, design, develop, implement, test, or evaluate software and systems in relation to military weapons and aviation systems.Undertake additional duties as assigned.Qualifications:Proficient understanding of embedded systems software development life cycles, particularly in real-time software environments.Familiarity with avionics systems, including mission computers and software-defined radios, is highly desirable.Excellent communication skills to effectively interact with leadership, fleet personnel, and peers.Strong knowledge of embedded coding languages, especially C, C++, Ada95, or Ada98.Exceptional organizational abilities.Prior experience in program office-level software development, including specifying, managing, or acquiring software products.

Company OverviewCensys is on a mission to revolutionize the way we understand the internet. Frustrated by the scarcity of reliable online intelligence, we have developed the most extensive, precise, and current mapping of the digital landscape. Our real-time internet intelligence and actionable threat insights empower global governments, over half of the Fortune 500, and leading threat intelligence providers around the world.Location: This position is fully remote within the United States or Canada.Role Overview:We are seeking a Senior Software Engineer - Integrations to contribute to the development and evolution of our next-generation Censys Platform. You will collaborate closely with product and engineering teams to design, deploy, and maintain scalable integrations between the Censys platform and third-party systems, including SIEMs, SOARs, and Threat Intelligence Platforms (TIPs). These integrations enhance attack surface data and deliver actionable insights directly into the tools that practitioners and CISOs rely on for improved visibility, threat hunting, and incident response. Your contribution will be pivotal in enabling organizations, governments, and security providers to better understand everything on the internet and contribute to making it a safer space.

RegScale is a cutting-edge continuous controls monitoring (CCM) platform dedicated to empowering organizations through automation and scalability in their security, risk, and compliance initiatives. As we evolve from our startup phase into a structured engineering organization ready for enterprise demands, we are assembling a talented team to drive this transformation. Integrations are key to our value proposition, seamlessly linking our platform with the security, engineering, and business tools our customers rely on daily, while ensuring the integrity of compliance data across complex enterprise environments. The Role As a Senior Software Engineer on the Integrations team, you will take the lead in designing and delivering systems that connect RegScale to external environments. You will leverage frameworks and design patterns to create reusable foundations that streamline integrations, enhancing speed, reliability, and maintainability. Your commitment to ownership spans from initial design through to production, and your success will be measured not only by what you deliver but also by the quality and reusability of the systems you create. In this role, you will confront challenging problems, including the synchronization of millions of security findings while preserving data integrity, creating resilient integrations that manage rate limits and eventual consistency, and developing data models tailored for diverse and unpredictable vendor APIs. Collaboration with Product, Customer Enablement, and Platform Engineering teams is crucial to ensure that integrations are robust and reflect real-world customer usage patterns within the Governance, Risk, and Compliance (GRC) landscape. This position is ideal for an engineer with strong systems thinking capabilities who thrives on taking complete ownership and is invigorated by the challenge of integrating complex external ecosystems into a reliable enterprise compliance platform.

Integrate develops program management software for advanced machinery and systems, with a focus on organizations in deep tech fields such as aerospace, autonomous vehicles, and robotics. The team is based in Seattle and works to improve collaboration and streamline workflows for companies tackling complex hardware projects. Current tools often fall short when it comes to the pace and complexity of hardware development in these industries. Integrate addresses this gap by building solutions that help teams and partners communicate more effectively, allowing innovation to move faster and with fewer obstacles. Role overview The Backend Engineer will play a key role in building and shaping the core infrastructure behind Integrate's platform. This position involves more than maintenance, engineers here design new systems and solve technical challenges that matter. The team values those who enjoy tackling problems like distributed system optimization, scaling data federation, and designing for a growing customer base. Collaboration is central. Expect to work closely with other engineers who move quickly and make considered technical decisions. Experience with systems that manage significant consumer or commercial traffic, such as cloud migrations, microservices, distributed data pipelines, or event-driven architectures, is especially relevant. What you will do Design and improve distributed backend systems that process high-throughput, real-time data with complex dependencies Own performance profiling and debugging for Go and Rust services, identifying and resolving bottlenecks Contribute to data federation architecture, including S3 integration, graduation pipelines, and downstream data services Develop and refine gRPC service interfaces and REST/JSON APIs for both internal and external users Work with SQL and NoSQL databases, focusing on schema design, query optimization, and durability strategies Collaborate on infrastructure decisions with platform engineers and technical leads Monitor and troubleshoot production systems, participate in on-call rotations, root cause analysis, and incident response Tech stack The backend is primarily written in Go, with Python supporting tooling and data workflows. The platform uses gRPC, REST/JSON, GraphQL, PostgreSQL, NoSQL databases, and Kubernetes for orchestration. Infrastructure is managed with Terraform. Location This Backend Engineer position is based in Seattle, WA.

A bit about us…Fleetio is an innovative software platform empowering thousands of organizations globally to streamline their fleet operations. The transportation technology sector is thriving, and we are at the forefront, gaining enthusiastic supporters and new clients every day. Recently, we secured $450 million in Series D funding in March 2025, propelling us towards an exciting future. Fleetio is also proud to be a founding member of the Rails Foundation!Discover more about our team and our company:Fleetio overview video: https://www.youtube.com/watch?v=IlvIbwZT3oUOur careers page: https://www.fleetio.com/careersAbout the RoleFleetio is looking for a Senior Software Engineer to join our Integrations team. In this role, you will engage in full-stack development to create thoughtful and reliable solutions—designing user-friendly experiences for partners while also enhancing the backend systems and integrations that support them. Your contributions will be pivotal in advancing usability and design quality throughout our product, as well as scaling data flows and partnerships effectively.This is a remote opportunity open to candidates from the United States, Canada, or Mexico.

About GigsAt Gigs, we are revolutionizing the mobile services landscape by creating a seamless operating system that enables technology companies to effortlessly integrate global connectivity into their products.Analogous to how Stripe simplifies payment processing, Gigs provides platforms with the tools to incorporate connectivity, merging traditional telecommunications with cutting-edge technology. Our solutions empower fintechs launching mobile services and HR platforms offering work phone plans, streamlining provisioning and alleviating telecom complexities.Our dynamic team of approximately 100 professionals across the United States and Europe is backed by nearly $100 million in funding from prestigious investors, including Ribbit Capital, Google, and Y Combinator. As one of the fastest-growing tech companies, we unite early-stage engineers, product innovators, and business strategists from notable organizations like Stripe, Airbnb, and Shopify. We are dedicated to addressing complex technical and regulatory challenges to create truly seamless connectivity.If you are fueled by curiosity, creativity, and the opportunity to shape the future of telecom, we welcome your application.The RoleWe are seeking a Senior Software Engineer - Integrations who excels at the intersection of engineering and impact. You are not just a backend expert; you are a systems connector who removes obstacles for teams and transforms complexity into streamlined solutions. For you, code is a vehicle for delivering business value, crafting elegant integrations, and enhancing product interoperability. If you are passionate about solving intricate challenges, collaborating across functions, and building the framework that ensures everything functions harmoniously, this role is perfect for you.

Mission Overview: We are seeking a highly skilled Senior Software Engineer to spearhead the development and execution of automated workflows, advanced tooling, and insightful analytics that will empower our autonomy stack to achieve unparalleled scalability. Your expertise will be crucial in transforming vast datasets into actionable engineering insights, ensuring that our software releases are resilient, thoroughly validated, and prepared for real-world deployment. Key Responsibilities: Design Intelligent Tooling: Lead the design and implementation of sophisticated automation systems aimed at categorizing and elucidating complex system behaviors using advanced data modeling techniques to expedite solution delivery. Drive Analytical Initiatives: Take charge of developing impactful performance visualization tools that convert raw metrics into clear, actionable insights related to on-road performance. Enhance Release Engineering: Leverage your experience to refine our release processes, steering the team towards a highly automated deployment framework that upholds quality while boosting efficiency. Advance Simulation Techniques: Play a pivotal role in enhancing our virtual testing environments, ensuring our simulation suites deliver the high-fidelity feedback necessary to accurately interpret releases. Collaborate Across Disciplines: Engage within a large, multi-disciplinary codebase to facilitate seamless integration between planning, motion, and control teams. Qualifications: Substantial experience in building production-grade applications, tools, and pipelines using Python. Proficient in navigating and contributing to large, complex codebases where modularity and thorough documentation are essential. Demonstrated success in delivering software in a production environment, with familiarity in CI/CD practices, version control at scale, and rigorous release cycles. Strong curiosity about data, with the capability to extract meaningful patterns from complex, high-dimensional datasets. A deep passion for a driverless future, with an understanding of the critical nature of deploying software that interacts with the physical environment. Bonus Qualifications (not mandatory): Experience with C++ in a Linux environment. Familiarity with Machine Learning frameworks or Large Language Model (LLM) integration. A background in robotics middleware (ROS, DDS) or autonomous systems.

Join a dynamic and rapidly expanding leader in the cybersecurity sector, trusted by major enterprises and government entities alike. More than 30% of the world's top Managed Security Service Providers (MSSPs) leverage our advanced platform. We are at the cutting edge of safeguarding organizations from complex cyber threats through innovative AI and automation technologies. Our culture promotes diversity, transparency, and teamwork, nurturing creativity and innovation that results in significant market impact.Position OverviewWe are seeking a Senior Staff Software Engineer to take charge of one or more integration domains within our Automation-Driven Open & Unified SecOps Platform, which powers our AI-driven SIEM, NDR, Open XDR, and Multi-Layer AI solutions. This role demands more than just technical expertise; we need an individual who can independently lead projects from inception to completion, fill knowledge gaps as necessary, confidently make architectural decisions, establish technical direction, and mentor fellow engineers.As we grow, we require technical leaders who serve as the primary resource for design guidance, code evaluations, and engineering development within their domain—individuals whose contributions enhance the entire team's productivity. We operate at a fast pace, grant engineers significant autonomy, and integrate AI not only in our products but also in our development processes.This position has a dual focus: to deliver robust, production-grade integrations that cater to our expanding customer base, and to advance the architecture to enable platform scalability. You will design and implement microservice-based solutions utilizing both conventional and AI-native integration patterns—REST, GraphQL, streaming APIs, MCP, and LLM-powered automation—connecting our platform with a diverse array of cybersecurity tools and external services.What You Will OwnWe seek a candidate who prioritizes the tasks that AI cannot perform and leverages AI to enhance their efficiency.The unique contributions you will make include:Overseeing one or more integration domains from start to finish: defining the roadmap, making architectural decisions, weighing trade-offs, and ensuring timely delivery. You will identify challenges, scope solutions, and drive projects to completion.Making critical architectural decisions regarding system boundaries, API contracts, reliability targets, and build-vs-buy considerations that require deep insight and context no AI can substitute.Providing technical mentorship to the engineering team through design reviews, collaborative sessions, and code evaluations, focusing on empowering engineers to independently manage projects and make well-informed design choices.Setting technical direction and advocating for engineering excellence across the team, including quality, documentation, and secure coding best practices in distributed systems.What you'll enhance with AI:Streamline your design and development workflow using LLM-based coding assistants, AI-driven testing, and more.

Join our team as a Senior Software Engineer specializing in Middleware and Integration. In this pivotal role, you will be responsible for designing, developing, and implementing robust middleware solutions that facilitate seamless integration across various platforms. Your expertise will help drive efficiency and innovation within our software architecture, ensuring that our systems communicate effectively and meet the needs of our users.We are looking for a candidate who is passionate about technology and eager to work in a collaborative environment. You will work alongside a talented group of engineers and be instrumental in shaping our integration strategies.

About Applied IntuitionApplied Intuition, Inc. is at the forefront of advancing physical AI technology. Established in 2017 and now valued at $15 billion, this innovative Silicon Valley company is developing the critical digital infrastructure necessary to infuse intelligence into every moving machine on Earth. Applied Intuition serves various sectors, including automotive, defense, trucking, construction, mining, and agriculture, focusing on three main areas: tools and infrastructure, operating systems, and autonomous solutions. The company is trusted by 18 of the top 20 global automakers, as well as the United States military and its allies, to deliver cutting-edge physical intelligence solutions. With its headquarters in Sunnyvale, California, and additional offices in Washington, D.C.; San Diego; Ft. Walton Beach, Florida; Ann Arbor, Michigan; London; Stuttgart; Munich; Stockholm; Bangalore; Seoul; and Tokyo, Applied Intuition continues to expand its global reach. Discover more at applied.co.We are an in-office company, expecting our team members to primarily work from the Applied Intuition office five days a week. However, we value flexibility and trust our employees to manage their schedules responsibly, which may include occasional remote work, starting the day with morning meetings from home, or leaving early for family commitments.About the RoleThe Senior Software Integration Engineer will engage in software application development and integration tasks (covering embedded applications, cloud solutions, and user interfaces) for customer projects within the VehicleOS team. The customer applications team collaborates on all internal vertical development, integrating Vehicle OS with customer-specific applications and platforms to deliver functional and efficient vehicle solutions.Key ResponsibilitiesDeliver comprehensive application-level software features that span both software and hardware in C/C++, aligning with customer specifications.Engage directly with customers to identify target use cases and oversee the project from initiation to successful integration.Develop end-to-end software integrations in C/C++, handling applications such as Matrix headlight control and smart vehicle functionalities.

Join Systems Technology Research as a Senior Software Engineer specializing in Integration and Testing. In this critical role, you will contribute to the development and validation of cutting-edge software solutions. Your expertise will ensure the seamless integration of various systems and enhance the overall quality of our products.

At Relativity Space, we are revolutionizing the aerospace industry by constructing rockets that cater to current demands and future advancements. Our Terran R rocket is engineered to transport customer payloads to orbit, addressing the increasing need for launch capabilities. This is just the beginning; achieving commercial success with the Terran R will create new avenues for scientific progress, exploration, and innovation, pushing the boundaries of what is known.Becoming a part of Relativity Space means immersing yourself in an environment where autonomy, ownership, and impact are integral to every role. Here, you are not merely completing tasks; you are tackling unprecedented challenges, aiding in the development of a rocket, a manufacturing facility, and a business from the ground up. Regardless of whether your expertise lies in propulsion, manufacturing, software, avionics, or corporate functions, you will engage in cross-functional collaboration, influence key decisions, and witness your contributions materialize at an unprecedented pace. Relativity is a space where innovation and technical excellence coexist, and your insights will shape the narratives we create together. This is a pivotal moment in our journey; it’s early enough for you to make an indelible impact on our product, processes, and culture, yet advanced enough that the Terran R is tangible and gaining traction. The most significant work of your career awaits. Join us.About the Team:The success of our Terran R vehicle operations depends on highly integrated, robust, and thoroughly tested software systems. The Software Systems Engineering team is a multidisciplinary group responsible for guaranteeing that the integrated software system supporting vehicle operations is functional, scalable, and performant, ready for testing and launch in accordance with program timelines and risk management protocols. We connect vehicle software with ground systems and hardware teams to ensure reliable end-to-end system performance. Our focus encompasses system-level requirements development, safety engineering and analysis, software-hardware integration, risk management, system-level debugging, launch readiness verification, and operational support. We are vital to mission success, ensuring that all software components operate synchronously across the entire stack—from conceptualization to launch.

We are seeking a highly skilled Senior Embedded Software Integration Engineer to join our dynamic runtime team at plus-2. This pivotal role focuses on the seamless integration, optimization, and core feature development of our on-vehicle Advanced Driver Assistance (AD) systems. You will work collaboratively across various departments to define and implement critical components such as sensor and vehicle interface CAN integration, as well as diagnostics within the AutoSAR safety domain. Your responsibilities will also include integrating new vehicle platforms and actuators, developing tools and procedures for vehicle bring-up, and conducting on-vehicle testing and validation at our partner's proving ground, which may require regular travel. Join us in shaping the future of vehicular technology!

Driving the Future of Luxury Electric MobilityAt Lucid Motors, we aspire to redefine the notion of luxury electric vehicles, crafting experiences that elevate human interaction and surpass conventional boundaries in performance, space, and intelligence. Our vehicles are designed to be intuitive, liberating, and forward-thinking, ensuring a seamless transition into the future of mobility. We aim to lead in this new era by adhering to the fundamental principles of exceptional design, where every choice made is a commitment to enhancing individual experiences and environmental sustainability. When freed from conventional limitations, you can redefine your own experience. Join us and collaborate with some of the industry's most talented minds. We offer not just competitive salaries but a community of innovators eager to make a meaningful impact. If you are passionate about creating a more sustainable future, this is the place for you.

Mission Summary:Join our team as a Senior Software Engineer, where you'll be instrumental in developing and implementing automated workflows, intelligent tooling, and insightful analytics to enhance our autonomy stack's scalability. Your contributions will transform vast data sets into actionable engineering insights, ensuring that our software releases are robust, validated, and road-ready.Key Responsibilities:Develop Intelligent Tooling: Design and implement advanced automation to categorize and elucidate complex system behaviors, leveraging sophisticated data modeling to expedite solutions.Drive Analytics: Lead the development of impactful performance visualization tools that convert raw metrics into clear, actionable insights regarding on-road performance.Streamline Release Engineering: Utilize your expertise to refine our release processes, pushing towards a highly automated deployment framework that prioritizes quality while enhancing efficiency.Advance Simulation Capabilities: Enhance our virtual testing ecosystems to ensure our simulation suites deliver the high-fidelity feedback necessary for understanding releases.Collaborate at Scale: Work within a large, multidisciplinary codebase to guarantee seamless integration between planning, motion, and controls teams.

About Us:At Glydways, we are redefining public transportation. We envision a world where mobility serves as a key to unlocking opportunities—bridging gaps to housing, education, jobs, commerce, and healthcare. By enhancing transportation accessibility, affordability, and sustainability, we aim to empower communities and foster economic and social growth.Our mission is to transform transit with a solution that ensures high capacity, remarkable user experiences, affordability, and minimal environmental impact.The Glydways network is an innovative system of carbon-neutral, interconnected transit pathways utilizing standardized autonomous vehicles on dedicated roadways. Operating around the clock with on-demand access, we provide personalized and efficient mobility solutions—eliminating the challenges of hefty upfront infrastructure costs and ongoing taxpayer subsidies.With Glydways, we are not just creating a transportation system; we are shaping a future where everyone has the freedom to move, regardless of where they are.Join Our Team:The Developer Platform team, part of Software Foundations and Architecture, is dedicated to building and maintaining the infrastructure that empowers all developers to track, build, deploy, and manage our software. From the build system to the tools for submitting and deploying changes, and the cloud infrastructure for operations, we enhance the entire development experience. Our team creates tools that enable the software engineering organization to thrive while collaborating with engineers across various teams.

Mission Overview: Join us as a Senior Software Engineer, where you will be integral in crafting and deploying automated workflows, advanced tooling, and insightful analytics to enhance our autonomy stack's scalability. You will be essential in transforming vast datasets into actionable engineering insights, ensuring our software releases are robust, validated, and road-ready. Your Responsibilities: Create Intelligent Tooling: Design and implement advanced automation to analyze and clarify complex system behaviors, utilizing sophisticated data modeling to expedite solutions. Lead Analytics Development: Spearhead the creation of impactful performance visualization tools that convert raw metrics into clear, actionable insights regarding on-road performance. Enhance Release Engineering: Use your expertise to refine our release processes, moving towards a highly automated deployment framework that preserves quality while boosting efficiency. Advance Simulation Capabilities: Elevate our virtual testing environments, ensuring our simulation suites deliver high-fidelity feedback for comprehensive release understanding. Collaborate Across Teams: Engage within a large, multi-disciplinary codebase to guarantee seamless integration across planning, motion, and controls teams. Qualifications We're Seeking: Significant experience in developing production-grade applications, tools, and pipelines using Python. Proficient in navigating and contributing to large, complex codebases with an emphasis on modularity and documentation. Demonstrated success in delivering software in a production environment, with knowledge of CI/CD, version control at scale, and stringent release cycles. A keen curiosity for data and the ability to derive meaningful patterns from complex, high-dimensional datasets. A strong passion for a driverless future and an understanding of the critical nature of deploying software that interacts with the physical world. Bonus Skills (not mandatory): Experience with C++ in a Linux environment. Familiarity with Machine Learning frameworks or Large Language Model (LLM) integration. Background in robotics middleware (ROS, DDS) or autonomous systems.