Lead and own design, implementation, and maintenance of backend services for KYC workflows, sanctions screening, alert management, and regulatory reporting. Role is remote (United States or Canada) with periodic travel to San Francisco/Berkeley (~twice per quarter). Requires a minimum of 7 years of backend engineering experience; Golang proficiency is a significant advantage.

Senior backend Software Engineer responsible for designing, building, and maintaining backend services and APIs. Requires 7+ years of web backend development experience, proficiency in English, strong experience delivering production services, and domain knowledge in fraud prevention/fintech. Technologies referenced include Go, TypeScript/Node, Ruby, Python, Java, PostgreSQL, Bigtable, BigQuery, Apache Beam, Terraform and GCP.

Work as a backend engineer on systems that power card issuance, approvals, spend controls, and transaction workflows. Responsibilities include designing and scaling backend systems and APIs, integrating with Ramp’s AI platform and financial partners, owning projects end-to-end, and ensuring reliability, performance, and data consistency. Requires 1+ years of software engineering experience and familiarity with Python, Go, or TypeScript, PostgreSQL, and AWS.

Netguru seeks a Senior Python Developer for freelance B2B engagement (full-time, long-term), remote based in the European Union. The role involves developing and maintaining Python backend services in a microservices architecture, working with Microsoft Azure (including Azure Functions and Azure Service Bus), Docker, SQL/NoSQL databases, message queueing, CI/CD and testing with Pytest. Polish at C2 and English at B2+/C1 (listed as C1) are required. Salary indicated up to 139 PLN/h.

Role involves maintaining and developing Kubernetes operators and a CSI plugin, building a web-based solution to manage distributed storage, and defining/implementing APIs with other teams. Requires 8+ years web development experience, strong Node.js skills, experience with Kubernetes, Python/Bash scripting and Linux. Listed base salary range across levels is 184,000–356,500 USD per year.

Role to design and implement an automation factory pipeline that converts AI models into validated, deployable NIM services across Cloud, On‑prem and Kubernetes. Responsibilities include infrastructure, pipelines, Docker builds, test harnesses, metrics, performance engineering and observability. Requires strong experience in distributed systems, containerization (Docker, K8s), CI/CD, cloud technologies and 8+ years of relevant experience; BS/MS in CS or equivalent preferred.

Netguru seeks a senior backend engineer (freelance, B2B, remote - EU only) to design and build scalable backend systems, ETL pipelines, and high-performance APIs. Required skills include JVM languages (Java/Scala/Kotlin), relational and NoSQL databases (PostgreSQL, MySQL, MongoDB), cloud platforms (AWS/GCP/Azure), and experience with performance optimization and distributed systems. English proficiency at C1 is required; rate up to 30 EUR/hour.

Netguru seeks a Senior Golang Developer (freelance, fully remote) to develop and maintain backend services in Go. Role may be full-stack if candidate has React/frontend experience. Requires production experience building backend systems and APIs, automated testing, CI/CD, familiarity with cloud environments (preferably AWS), use of AI-assisted development tools, and strong English communication.

100% remote freelance backend Kotlin engineer role, full-time, starting around mid July 2026 with minimum 6 months duration and a rate from 70 PLN/h. Requirements: good written and spoken English, located in the European Union, experience with Kotlin, Kubernetes, event-driven systems (Kafka), CI/CD for mobile and backend, DevOps collaboration, and familiarity with certification/compliance processes.

Responsible for designing, building, deploying, and operating backend services for Mapbox's Navigation and Traffic initiatives. Role emphasizes scalability, low-latency performance, testing and monitoring, reducing technical debt, and on-call support. Requires 5+ years experience and proficiency with Python, TypeScript (backend), and AWS (CDK/ECS/Step Functions/Lambda/S3).

Lead engineering and delivery of ML-driven recommendation systems for Mapbox's routing cost engine. Responsibilities include building and optimizing ML/data pipelines, leveraging geospatial algorithms, partnering with data scientists, implementing automated QA and monitoring, mentoring engineers, participating in code/design reviews, and joining an on-call rotation. Requires ~8+ years backend and ML experience, reinforcement learning knowledge, Python, large-scale distributed processing (Hadoop/Spark/Airflow/Dask), and cloud infrastructure experience (AWS).

Intuition Machines seeks a Senior Backend Engineer focused on security automation to design, implement, and maintain tools and services that automate SOC workflows (bot detection, fraud mitigation, phishing detection). Requires 5+ years backend experience, strong Python and microservice skills, secure coding (OWASP), SQL, Docker, and experience with testing, observability, and reliability. Fully remote with flexible hours; positions based in Argentina (Buenos Aires) and Poland (Wrocław).

Join the Detection team to develop, support, and maintain core hCaptcha application tools and services that detect and verify user events. Responsibilities include designing low-latency, high-availability features, writing tested maintainable code, practicing DevSecOps (security, monitoring, automation), participating on-call, and collaborating with Security and Machine Learning engineers and customer-facing teams. Position is fully remote; role lists Argentina (Buenos Aires) as the location. Pre-employment screening and identity verification are required.

Work on core production backend code including distributed systems and ML paths. Responsibilities include designing, building, and maintaining backend services, implementing DevSecOps practices, monitoring and tracing, writing production-quality code with tests, and participating in code reviews and on-call rotations. Requires a minimum of 5 years' hands-on experience and expertise in Python plus at least one of Golang, Rust, or C++.

Human Made seeks a freelance Senior Web Engineer to join its distributed team remotely. The role requires deep WordPress knowledge (internals and ecosystem), strong PHP and JavaScript skills, experience with REST APIs, Git, MySQL, debugging, performance and security, and the ability to architect complex subsystems and contribute to team activities.

Work directly with CEO/CTO to design and build Bask Health's serverless telehealth backend. Responsibilities include end-to-end ownership of services, writing well-tested code, prototyping with LLMs (Claude, Cursor), building for scale and reliability, and collaborating across the team. Required technical focus areas include Next.js, SST, TypeScript/JavaScript, Node.js, SQL databases and AWS services.

Work directly with CEO/CTO to design and build Bask Health's serverless telehealth platform. Responsibilities include end-to-end ownership of services and surfaces, writing tested TypeScript/JavaScript code, prototyping with AI tools (LLMs, Cursor, Claude), and building for scale, performance, accessibility, and reliability using Next.js, SST, Node.js, SQL, Drizzle and AWS services.

1Password is hiring a remote Backend Developer for US and Canada-based candidates. The role involves coding, testing, debugging, delivering and maintaining production systems, collaborating with cross-functional teams, participating in planning, mentoring junior engineers, performing code reviews, and being part of an on-call rotation. Required: 2+ years of software development experience and proficiency in Golang; bonus for experience with Kotlin, Swift, Rust, or JavaScript.

Tenki is hiring a Golang engineer to architect, implement, and operate core gRPC API services (ConnectRPC), manage identity services on the Ory stack (Kratos, Keto, Hydra), design a private programmable microservices fabric (overlay networking, WireGuard/service mesh), and develop DDoS mitigation and immutable infrastructure patterns. Role is remote but requires reliable overlap with LATAM (GMT-3) or Philippines (GMT+8) core timezones and strong English communication.

As an experienced SDET II on the Pro team, you will design, build, and own automated testing frameworks for backend APIs and trading workflows, drive CI/CD and automation improvements, review designs and MRs for testability, investigate distributed system failures, and mentor engineers. The role expects strong engineering skills in Python/Rust/C++, deep backend and API testing experience (REST, WebSocket, gRPC, FIX), and experience with containerised CI/CD environments and real-time trading systems.