Build and improve Nitro, the core node software powering Arbitrum, focusing on transaction execution, state management, and network performance.
Solve distributed systems challenges and enhance reliability, observability, and security across critical blockchain infrastructure.
Develop new capabilities for the Arbitrum stack, including Stylus, which enables smart contracts in Rust and C/C++ via WASM.
Offchain is pioneering blockchain scalability and security, building the Arbitrum stack that powers the leading Ethereum scaling solution. The company is backed by $124 million in funding and has a team of thinkers and doers committed to decentralized systems and a more equitable digital future.
Build and expand a large-scale healthcare data platform and member management solution.
Design, develop, and maintain high-performance backend services and APIs.
Mentor junior and mid-level engineers through technical guidance and code reviews.
Ubiminds is a GPTW-certified, people-first company that partners with American software product companies to scale their development teams. They connect Brazil’s top 5% talent with innovative U.S. companies through staff augmentation and employer-of-record services.
Act as second-in-command across backend and ML teams, owning architecture and technical decisions end-to-end.
Translate business problems into technical solutions, leading a small team to deliver working results.
Drive execution in a fast-paced, shifting environment while staying hands-on and handling cross-team alignment.
Social Discovery Group is a global leader in social discovery, uniting millions across dozens of platforms to combat loneliness and redefine virtual intimacy. The company employs over 1,000 professionals worldwide and has been recognized as a Great Place to Work.
Own the end-to-end technical architecture of Sparkrock's SIS platform, spanning legacy VB6/COM/T-SQL systems and modern C# layers.
Direct AI coding agents (Claude Code) to implement architectural decisions — you design, agents build.
Define and enforce architectural guardrails: domain boundaries, coding conventions, and integration patterns for AI agents to follow.
Sparkrock helps social benefit organizations like nonprofits, school boards, and government agencies reach their full potential through technology. The company is a best-in-class, 100% remote organization with the brightest talent from around the world.
Design, build, and maintain scalable back-end systems and APIs for high-throughput messaging operations.
Improve platform reliability, performance, observability, and automation across onboarding, compliance, and routing.
Collaborate with Product and Operations teams to translate complex workflows into scalable distributed systems.
Volt Labs builds the infrastructure layer behind modern business messaging, helping companies navigate messaging compliance, onboarding, deliverability, routing, and operational complexity across carriers and providers. We are a remote-first, high-ownership team operating in a fast-moving growth environment with a deep focus on builder mentality, operational excellence, and collaborative culture.
Own the engineering organization for the cash delivery platform, including structure, staffing, and operating model.
Drive multi-year technical strategy, balancing build vs. buy decisions and architectural transitions for recipient impact.
Represent engineering at leadership level, translating technical realities into business decisions and coaching engineers.
GiveDirectly delivers cash transfers to people living in poverty, having distributed over $1B to 2+ million recipients across 15 countries since 2011. The organization is one of Time100's Most Influential Companies of 2026 and fosters a candid, analytical, non-hierarchical culture that supports high ownership and professional growth.
Design systems for the Performance Medicine product, from initial technical plans through shipped code.
Build Ruby services that capture and move athlete medical data with accuracy and privacy.
Take on reliability and scaling challenges for a platform used by thousands of teams globally.
Kitman Labs is a performance intelligence company that disrupts and transforms how the sports industry uses data to unlock athlete potential. The company is used by over 2000 teams in 50 leagues on 6 continents, including the NFL and Premier League.
Envision and build scalable backend architecture and AI applications for guest-host communication.
Collaborate cross-functionally with design, product, and data science teams.
Mentor engineers and lead technical strategy for high-impact systems.
Airbnb connects hosts and guests globally, with over 5 million hosts and 2 billion guest arrivals. The company fosters inclusion and belonging, with a focus on diverse ideas and innovation.
Drive high-stakes, multi-stakeholder technical programs embedding AI capabilities across the entire product surface area.
Manage complex execution dependencies of building software that recommends next steps and automates meaningful parts of customers' operations.
Partner with engineering leadership to design and operate an AI hybrid workforce with guardrails, evaluation frameworks, and observability.
Brightwheel is the largest, fastest growing, and most loved platform in early ed, trusted by millions of educators and families every day. They are a three-time Cloud 100 company backed by top investors including Addition, Bessemer, Emerson Collective, Lowercase Capital, Notable Capital, and Mark Cuban, with a distributed team across every US time zone.
Lead technical architecture and engineering standards across customer-facing and operational systems.
Champion AI-assisted development, establishing best practices for LLMs in coding, testing, and workflows.
Mentor engineers and drive engineering excellence through code quality, CI/CD, and operational reliability.
Koala Health aims to make managing your pet’s health simple and delightful, offering a pharmacy service for medications and supplements delivered in pre-sorted pouches. The company fosters a remote-first culture built on flexibility and trust, with a supportive, close-knit team that celebrates wins and learns fast.
Act as the right hand to the CTO, steering backend and ML teams while remaining hands-on in development.
Translate complex business challenges into scalable technical solutions and lead small teams toward fast execution.
Ensure alignment across engineering, product, and infrastructure in a fast-moving, globally distributed environment.
The company is a technology organization focused on AI product development and engineering. They operate in a globally distributed, fast-paced environment with small, focused teams and a startup mindset.
Setting and driving the technical strategy across the Partners engineering teams, from architecture decisions through to hands-on implementation.
Owning the design of core backend services for high-performance distributed systems, with scale and reliability as non-negotiables.
Acting as the technical authority on partner integrations — shaping how third-party PSPs connect with Primer's platform.
Primer is the unified infrastructure for global payments, giving finance teams visibility and control. We are backed by top investors and have a remote-first culture focused on impact.
Building stuff: coding, code reviews, fixing bugs, incident response, and reverse-engineering.
Planning and architecture: estimating, collaborating with products, and establishing MVP.
Learning and teaching: coaching and mentoring developers to level up over time.
Lightspeed provides a cloud commerce platform that unifies online and physical operations for retail, hospitality, and golf businesses. Founded in 2005 and dual-listed on NYSE and TSX, the company has teams across North America, Europe, and Asia Pacific, and fosters a culture of inclusion and flexibility.
Own architecture and write core low-latency code in Rust for validator submission and network routing.
Cut latency through optimal algorithms, data structures, and OS-level performance tuning.
Lead multi-region rollout on bare-metal and cloud, automate releases, and own latency/uptime SLOs.
P2P.org is the largest institutional staking provider with a TVL of over $10B and a 20%+ market share in restaking. We unite talented individuals globally and share a passion for decentralized finance.
Design, build, and maintain highly available, scalable, and secure blockchain products, systems, and infrastructure.
Collaborate with cross-functional teams to improve infrastructure, monitoring, automation, and incident response.
Research emerging trends in web3/blockchain and identify new product opportunities.
Galaxy is a global leader in digital assets and data center infrastructure, delivering solutions that accelerate progress in finance and artificial intelligence. The company is headquartered in New York City, with offices across North America, Europe, the Middle East, and Asia, and blends deep crypto expertise with institutional experience.
Own the architecture, design, and delivery for your team's platform area, turning roadmap into engineering plans that ship and hold up in production.
Design and build core parts of a compound AI system spanning agents, LLMs, and RAG, with a focus on reliability, evaluation, and scale.
Champion engineering best practices, mentor engineers, and partner with product and design counterparts to align on priorities.
Crogl builds fully autonomous AI team members for security operations centers (SOCs), helping organizations secure their digital estates. As a startup with a focus on innovation, they seek senior technical leaders to join their remote team.
Develop, ship, and maintain features for Agentic Tools across the GitLab monolith backend in a secure, well-tested manner.
Collaborate with Product Management, UX, and AI specialists to refine requirements and deliver high-quality product enhancements.
Design and review GraphQL and REST APIs, ensuring reliability, scalability, and clear contracts with frontend clients.
GitLab is the intelligent orchestration platform for DevSecOps, enabling organizations to increase developer productivity and accelerate digital transformation. With over 50 million users and a high-performance culture driven by values and continuous knowledge exchange, GitLab empowers team members to reach their full potential.
Build core systems, advanced backend products, and engineering culture for scaling enterprise automation and workflows.
Own complex production systems, optimize internal tooling, and design AI-native engineering functions.
Work directly with leadership on high-leverage problems like data processing, search, and AI-assisted operations.
Frontier helps fast-growing companies build full-time, cross-functional teams abroad by hiring top talent. It is a subsidiary of Fresh Prints, a New York-based, fully remote company with around 150 employees, and values work smarter culture and long-term ownership.
Own product features end-to-end from spec to API to UI to deploy and iterate.
Design high-performance APIs and services powering the platform with a polished frontend.
Build secure, scalable systems handling sensitive data using Rust, TypeScript, and Postgres.
Footprint builds Percy, an AI agent that automates financial crime investigations for banks and fintechs. Backed by investors like Index and QED, the small, senior team 5x'd revenue last year and ships fast.
Design, build, and deploy AI-powered solutions connecting Remote’s platform to customer systems and workflows.
Work at the frontier of practical AI, shipping reliable, observable, and secure systems in production.
Own customer outcomes from discovery through production rollout with high autonomy and direct influence on product roadmap.
Remote is a global HR platform that helps businesses recruit, pay, and manage international teams compliantly. The company fosters a future-focused, async culture with team members across 6 continents and emphasizes innovation, automation, and AI.