Netguru is hiring Senior Fullstack / Fullstack Engineers to own and build internal grading tooling and systems around inventory and order flows. Tech stack: Node.js, TypeScript, Python, PostgreSQL, Kafka, microservices; infra: Terraform, Kubernetes. Role is freelance, 100% remote, full-time with CET working hours; senior rate up to €41/h (regular up to €35/h).

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).

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 the CEO and CTO to design, build, and ship end-to-end features on a serverless, multi-tenant telehealth platform. The role emphasizes backend and full-stack development with TypeScript, Node.js, Next.js, tRPC, Prisma, SST and AWS services (SQS, EventBridge, Lambda). Engineers use LLMs (Claude, Cursor) as part of the workflow, own large areas of the codebase, write well-tested code, and focus on performance, accessibility, reliability, and clear automation in a fast-paced startup environment.

Bask Health seeks an engineer to own end-to-end features on a serverless, multi-tenant monorepo. The role works across the stack (Next.js/React front end; tRPC/Prisma/Node backend), uses TypeScript throughout, is AI-first (Claude, Cursor, LLMs), and emphasizes testing, database schema design, performance, accessibility, and reliability. Locations listed include United States, Spain, Egypt, Argentina (Buenos Aires), and Brazil.

Build and operate core Go-based gRPC API services and a private programmable microservices fabric. Manage identity services using the Ory stack (Kratos, Keto, Hydra). Design for resilience and security (DDoS mitigation, eBPF, traffic shaping), practice immutable infrastructure, and collaborate with application and platform teams to expose stable APIs. Must be comfortable communicating in English across a distributed team.

Kodify is hiring a Senior Full-Stack Developer to help evolve a platform serving ~100M unique visitors/month. Responsibilities include technical design, development, testing, performance optimization (metrics, distributed tracing), and collaboration with product and design. Role supports remote work within the EU (core hours 10:00–15:00 CET) or optionally in the Barcelona office. Required: ≥4 years full-stack experience, expertise in React and Node.js, NoSQL, Docker, JavaScript/TypeScript, browser APIs, and experience using agentic AI development tools. Nice-to-have: MongoDB, Redis, Express, Fastify, GraphQL, RabbitMQ, AWS, Next.js, Redux, microservices and DDD experience.

Lead architecture and implementation of backend services and storage layers (relational, NoSQL, object storage) for Docker Hub. Requires 10+ years backend experience, strong Go and Kubernetes production experience, familiarity with high-scale storage (PostgreSQL, DynamoDB), cloud services (AWS), and event-driven systems (Kafka, SNS/SQS). Role is remote-first and may include on-call rotations.

Four Kitchens is hiring a remote Backend Drupal Engineer (title includes Costa Rica). Responsibilities include writing clean, scalable PHP and JavaScript code, developing custom and community Drupal modules, performing content migrations, participating in code reviews, architecting Drupal solutions, and working closely with clients. Candidates should have experience with PHP and JavaScript, exposure to Drupal or similar CMS (WordPress), strong communication skills, and familiarity with modern JavaScript frameworks such as React. The role is on a distributed team and encourages open-source engagement.

Join the Hierarchy Squad to develop and optimize high-throughput backend services that comprise ClickUp's filesystem. Responsibilities include building and maintaining backend systems with Node.js (Express, NestJS), tuning database queries (Postgres), debugging, and collaborating across teams. Remote work options are available; visa sponsorship for engineering/product roles may be considered but is not guaranteed per the posting.

Join ClickUp's Fields team to design and implement scalable, high-throughput, low-latency backend systems handling millions of requests daily. Responsibilities include end-to-end development, performance tuning, building robust APIs, and improving existing systems. Qualifications include a CS degree or equivalent, 5+ years building performant systems (ideally with Node.js and TypeScript), SQL at scale, event-based systems experience, and familiarity with major cloud services (ideally AWS).

Contract Senior Web Engineer (remote, global) responsible for architecting and implementing large-scale WordPress systems: building high-performance plugins and themes with modern PHP and Gutenberg (React), defining backend architecture and strategy, improving performance and caching, conducting code reviews, and mentoring through code. Contractor position with potential future full-time opportunities.

Planner 5D is hiring a Senior Python Engineer to develop production-ready systems that support the AI lifecycle: data collection/processing pipelines, tooling for pre/post-processing, and deploying models at scale (Triton Inference Server, ONNX, TensorRT). The role works closely with research and uses ChatGPT API and LangChain; requires strong Python, experience with Docker/Kubernetes, domain-driven design and clean coding practices. English Intermediate+ is required.

G2i is hiring a Senior Full-Stack Engineer to design, develop, and maintain full-stack web applications using React 19 and Node.js. Responsibilities include implementing tRPC APIs for type-safe communication, containerizing and deploying applications with Docker, maintaining CI/CD pipelines, and collaborating with designers and engineers. Requires 5+ years professional full-stack experience. Remote-first; contract engagements (up to 6 months) are available. Compensation listed at 50–150 USD/hour.

Long-term independent contractor, fully remote (must be located in Argentina or Brazil). Require 5+ years Python web development experience (financial systems preferred), experience with SQL databases (MySQL/PostgreSQL), Django or similar, AWS and Docker. Responsibilities include building AI agent orchestration, payment and billing systems, multi-tenant batch processing, reconciliation, and public APIs. Resume requested in English.

Build and operate production AI agents and the MCP servers that orchestrate them; develop integration layers (identity, e-signature, real-time data services); implement rules engines, configuration runtimes, and multi-tenant infrastructure; design public APIs. Requires 5+ years Python web development, 3+ years with SQL databases, 3+ years SaaS/cloud development, 3+ years with Django or another Python framework, experience with Docker and AWS, API development experience, and regular use of agentic AI coding tools.

Close is hiring a Senior Software Engineer (Backend) for a USA-only, fully remote role. The position focuses on building Python/Flask backend services, shipping LLM-backed features and agent infrastructure, and operating systems on AWS (EKS, RDS, EC2, ElastiCache, MSK). The stack includes MongoDB, PostgreSQL, Elasticsearch, Redis, Docker, Kubernetes, Terraform and Ansible. Teams include Agents, Communications, CRM and Growth; responsibilities include API design, real-time and async processing, and scaling production services.

Canonical seeks a Python Engineering Manager based remotely in EMEA to lead teams in the Commercial Systems unit. Responsibilities include accountability for an internal product's design and development, developing direct reports, driving process and design improvements, and aligning engineering work with business needs. Relevant domain areas in the unit include data governance (Trino, Ranger), SaaS user management and onboarding, ETL/integrations, and performance/SRE practices. Role requires professional English and ability to travel internationally twice a year.