Mid Java Backend Engineer

Topstep is hiring a Senior Mobile Engineer to build its mobile trading platform using React Native and TypeScript. The role involves shipping iOS and Android apps, integrating with GraphQL and real-time data, establishing reusable components and architecture, improving performance and reliability, and mentoring other engineers. Requires 5+ years of mobile experience with substantial React Native work.

SeatGeek is hiring new college graduates (spring/summer 2027) for junior software engineering roles across backend, frontend web, mobile, platform, and machine learning. Responsibilities include building cloud-backed services and user interfaces, leveraging AI tools, running experiments, and scaling software for a multi-sided ticketing marketplace. Candidates should be graduating in 2027, have experience building software (preferred but not required), and be able to work from the New York City office at least three days per week during the first year.

Lead frontend engineer responsible for designing, building, and owning user-facing features in React and TypeScript, setting frontend technical direction and mentoring peers. Role involves using AI-assisted development tools, collaborating with stakeholders, and occasionally working in Go on backend services. Technologies include TypeScript, React, Node.js, Golang, PostgreSQL, Bigtable, BigQuery, Python, and Terraform.

Renaissance is hiring a Software Engineer II to build and maintain scalable backend services and RESTful APIs using .NET Core/.NET 5+ and support React-based frontend applications. The role requires writing unit and integration tests, working with SQL Server and PostgreSQL, collaborating with cross-functional teams, and using AI-assisted development tools. Minimum 5 years backend .NET experience and 4 years React experience. Position is remote (US); employer does not sponsor employment visas. Salary range stated: $82,200–$113,100 (base, annual).

Join NVIDIA DGX Cloud Production Engineering to build automation, tooling, and operational systems for large-scale GPU clusters. Responsibilities include provisioning, validation, upgrades, monitoring, repair, and improving Day 0/1/2 workflows; participate in on-call and incident response. Requires 8+ years building or operating production infrastructure and strong skills in Python/Go, Linux, Kubernetes, containers, and infrastructure automation.

Lead architecture and delivery of a unified network visibility platform spanning topology, configuration, telemetry, active measurement, and self-service visibility products. Requires 10+ years' experience, strong proficiency in Python or Go, hands-on observability tools (Prometheus, Grafana, OpenTelemetry), Kubernetes, and experience with large-scale graph, time-series, streaming or event-driven systems.

DigitalOcean is hiring a Sr. Director, Managed Services (remote). The role centers on leading managed services within a cloud and AI-focused company, emphasizing organizational development, leadership, customer focus, and contributing to a high-performance organization. Compensation range and benefits (including potential bonus and equity) are referenced in the posting.

Capital One is hiring a Staff AI Engineer (remote-eligible, US) to partner with cross-functional teams to design, develop, deploy, and optimize foundation models and production AI systems (LLM inference, agents, VectorDBs, model routing/orchestration, observability, and governance). Requires advanced experience in AI/ML system design, cloud deployment (AWS/GCP/Azure), and programming (Python, Go, Scala, Java, C++, CUDA). Minimum experience: Bachelor's + 8 years or Master's + 6 years (posting supports a 6-year minimum). Salary ranges are listed by location in the posting; posting indicates Capital One may sponsor employment authorization.

Join MongoDB's Server Security team to design, implement, and test core security features in a large C++ codebase, including queryable encryption, at-rest encryption, TLS/X.509, PKI, and related networking and integrity systems. The role involves cross-team coordination for feature rollouts, leading investigations in complex code areas, mentoring peers, and applying distributed systems fundamentals to improve MongoDB's security posture. Location is remote or hybrid anywhere in the USA or Canada; the listed U.S. base salary range is $126,000–$248,000 USD per year.

Add and maintain core security features in MongoDB's C++ codebase, working on cryptography (queryable encryption, at-rest encryption), authentication/authorization, TLS and X.509, PKI and network security, and system integrity. Collaborate across engineering, cloud services, and support; lead features, investigations, code reviews, and mentor engineers. Role is remote or hybrid in the USA or Canada; MongoDB lists a Canadian base salary range of CAD 137,000–189,000.