Develop backend services in Go for blockchain interactions, implementing ERC-4337 account abstraction, smart contracts, and microservices.
Build frontend applications with React/Next.js, integrating embedded wallet SDKs, Web3 libraries, and real-time blockchain events.
Design and implement full-stack Web3 features from smart contract events to UI, including ZK Stack specifics, admin panels, and transaction tracking.
Xsolla is a global commerce company that provides tools and services to help video game developers fund, distribute, market, and monetize their games. With over 1,500 game developers served and a remote-first culture, Xsolla prioritizes employee well-being, creativity, and collaboration.
Leads a team of up to 8 backend engineers building Web3 infrastructure and blockchain services.
Balances 60% hands-on technical architecture with 40% people management and mentoring.
Drives delivery of Xsolla Bazaar, Web3 Backpack, blockchain services, and Web3 APIs using Go and ZK Stack.
Xsolla is a global commerce company providing tools and services to help video game developers fund, distribute, market, and monetize their games. Headquartered in Los Angeles, it has helped over 1,500 developers and fosters a remote-first, collaborative culture focused on creativity and play.
Develop and maintain backend services for Xsolla ID using Go and modern IAM protocols.
Design OAuth 2.0/OIDC flows and secure high-load identity systems for millions of users.
Optimize PostgreSQL, Redis, and CockroachDB performance in a microservices environment.
Xsolla is a global commerce company helping video game developers fund, distribute, market, and monetize their games. With over 1,500 game developer partners and a remote-first culture, Xsolla values creativity, collaboration, and employee well-being.
Work on core infrastructure powering Arbitrum, tackling distributed systems challenges and optimizing performance.
Collaborate with research, product, and blockchain engineering teams at the cutting edge of blockchain technology.
Establish backend architectural standards and drive technical roadmap for complex distributed systems.
Offchain Labs is a pioneer in blockchain scalability and security, building the Arbitrum stack that powers the leading Ethereum scaling solution. Backed by $124 million in funding, our team of thinkers and doers embraces new challenges and pushes boundaries.
Design, develop, and maintain scalable and secure backend services and APIs.
Collaborate with cross-functional teams including Product, Design, QA, and DevOps to deliver features end to end.
Mentor Middle and Junior engineers and drive engineering best practices.
Xsolla is a global commerce company helping video game developers fund, distribute, market, and monetize their games. It has helped over 1,500 developers worldwide grow their businesses and fosters a culture of creativity and collaboration.
Design, build, and operate backend services for Aave App across onboarding, funding, savings, withdrawals, portfolio data, and customer communications.
Build transaction-orchestration and indexing services that safely prepare, submit, monitor, and reconcile onchain activity across its full lifecycle.
Lead technical reviews for high-value systems and improve testing, observability, alerting, incident response, and deployment practices.
Aave Labs builds trusted products that expand access to lending, credit, and savings globally. We are a global team holding a high bar for quality and craftsmanship, turning complex technology into simple and reliable experiences.
Develop and improve backend services in Go across Rare Candy's collector-facing product.
Build and maintain GraphQL APIs, design relational data models, and implement business logic and integrations.
Write automated tests, investigate production issues, and collaborate closely with product, design, and engineering to ship features.
Rare Candy is revolutionizing the $25 billion trading-card industry as the 'friendly local game shop' in the palm of your hands, offering AI-powered card scanning, Instapacks, and collection tools for Pokémon, MTG, Lorcana, and more. We're a 10-person product team that has achieved 10x revenue growth over the last 6 months, is profitable, and maintains a high-trust, low-ego culture obsessed with trading cards.
Build and improve customer-facing registries, APIs, and artifact-serving systems that make open source software easy to consume securely and reliably.
Develop and operate backend services in Go, focusing on scalability, reliability, observability, and performance.
Collaborate with engineers and product partners on design, code review, and solving production issues.
Chainguard is the trusted source for open source, delivering hardened, secure, and production-ready builds of the software engineers and AI agents rely on. It is a venture-backed company serving Fortune 500 enterprises with a remote-first culture and a focus on customer obsession and intentional action.
Design and ship multi-tenant services for checkout, subscriptions, payments orchestration, invoicing, and tax hooks.
Integrate PSPs and local payment methods with resilient webhooks and idempotent APIs.
Implement an append-only double-entry ledger using event sourcing/CQRS to improve scale and correctness.
HighLevel provides an AI-powered business operating system for agencies, entrepreneurs, and SMBs to build, automate, and scale. With over 2,000 team members across 10+ countries, it operates as a global, remote-first organization that values initiative, clarity, and execution.
Design and build financial services in Go with correctness and auditability as first-class requirements.
Own core service components end to end, from design and implementation to rollout and on-call.
Integrate with external financial partners and build automated reconciliation and exception handling.
The company is building the financial core of a mission-driven fintech platform, including money movement, ledgering, and reporting systems. The team is small, fast-paced, and cross-functional, with a strong culture of ownership and a focus on correctness, auditability, and reliability.
Own and build backend-driven features for a top live game from design to launch.
Work closely with designers, client developers, product, and data to build scalable systems.
Reuse and extend Voodoo’s backend platform while ensuring the game can move fast.
Voodoo is a consumer tech company founded in Paris in 2013, on a mission to entertain the world with mobile games and apps. We are 1,000 people, generating $1b+ in annual revenue, and our games have reached 7 billion downloads with 200 million+ monthly active users.
Design, develop, and maintain back-end components for internal and open-source cybersecurity projects.
Build REST and GraphQL APIs, command-line tools, and containerized services using Python, Go, and Docker.
Contribute to infrastructure automation and collaborate with teammates to solve complex technical problems.
SpecterOps develops internal and open-source cybersecurity projects such as Mythic and Ghostwriter for the security community. We are a small, transparent team that values autonomy, collaboration, and continuous improvement.
Build and improve customer-facing package registries, APIs, and artifact-serving systems for secure software consumption.
Develop and operate backend services in Go, owning projects from technical design through deployment and iteration.
Collaborate across engineering and product teams to enhance scalability, reliability, and observability of production systems.
This partner company builds secure, reliable systems for serving software artifacts at scale, including customer-facing registries and APIs. It is a collaborative, remote-first environment focused on engineering ownership and continuous learning.
Build backend services and integrations with Golang, MongoDB, and Snowflake.
Support policy platform use cases and day-to-day integration work.
Deliver work under limited supervision, adhering to customer code review and deployment standards.
OnTrac is a logistics company specializing in parcel delivery services. As a contractor program supporting a critical customer engagement, they seek skilled engineers for project-based work.
Serve as a trusted solutions consultant, driving fast and successful customer implementations from contract to live.
Design and deliver post-sales solutions, optimize tools and data, and mentor customer engineering teams on API best practices.
Triage technical issues, create playbooks, and partner with Sales and executives across fintech, iGaming, and exchanges.
Mesh enables consumers to pay and be paid with any asset, bridging crypto payments to everyday commerce. Backed by leading investors like Paradigm and PayPal Ventures, the company is a fast-growing startup with a sharp, motivated team.
Design and build backend services in Rust for high-volume financial transactions with strong guarantees.
Own features end-to-end, from spec to production, and set technical direction for your area.
Integrate with external partners and improve engineering quality across observability and security.
MoonPay builds the operating system for value movement, enabling enterprises to fund, tokenize, trade, and spend digital assets. With top rankings in Fortune's Crypto 100 and Forbes' Best Startup Employers, they foster a high-velocity, high-accountability culture.
Architect, build, and maintain Go-based backend services and provider adapters for live pricing and availability.
Contribute to self-serve onboarding frameworks, GUI tooling, validation guardrails, and LLM-assisted integrations.
Own assigned adapter surfaces end-to-end with high availability, observability, and automated resiliency.
Inflect is a US-based advisory and marketplace that simplifies how companies buy and sell digital infrastructure such as datacenter, cloud, and network services. They are a mission-driven team focused on removing procurement friction and unlocking innovation for businesses.
Design, build, and maintain Go-based backend services and provider adapters for network, bare-metal/GPU, and data providers.
Contribute to self-serve onboarding frameworks including schema mapping, GUI tooling, validation guardrails, and LLM-assisted integration.
Collaborate asynchronously across distributed functions and own assigned adapter surfaces end-to-end with observable, well-tested services.
Inflect is a US-based advisory and marketplace transforming how companies buy and sell digital infrastructure such as data center, cloud, and network services. The team works across Brazil, Poland, and the US with a culture of autonomy, high impact, and async collaboration.
Own and ship Looma Marketplace features end-to-end, working backend-first across Go, GCP, Postgres, Redis, and BigQuery while contributing to Angular frontend when needed.
Evolve the backend toward scalable async workflows, queues, concurrency, caching, and clearer service boundaries while improving CI/CD and testing.
Own integrations, data pipelines, and internal tooling, using AI-assisted workflows to move quickly while keeping verification and quality high.
Looma is an in-store digital media platform that uses a network of screens to help retailers modernize and monetize their stores while enabling brands to tell their story at the point of decision. It is a small, product-focused team with a culture of ownership, craftsmanship, and AI-native engineering.
Design and develop reliable, scalable backend services and APIs in Go.
Build features for monitoring, observability, and management of database environments.
Work with OpenTelemetry, distributed systems, Kubernetes, and AI-assisted development.
Percona provides open-source database software, support, and services to enable everyone to innovate freely. We are a remote-only, globally dispersed team of experts across more than 50 countries with a collaborative, highly-engaged culture.