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Java Backend Developer - W2
Senior Java backend developer (W2) in Charlotte designing, building, and maintaining scalable, event-driven distributed applications using Core Java and Spring Boot, integrating Kafka messaging and AWS services, and contributing to CI/CD pipelines within Agile teams.
Senior .NET Backend Developer
On-site senior backend role at CoreKinect, an IoT hardware startup in Chandler, AZ. The developer designs and maintains scalable C#/ASP.NET Core services, REST APIs, and relational databases (SQL Server/PostgreSQL), plus event-driven messaging and production reliability work for enterprise applications.
Senior Backend Engineer, Node & TypeScript, Stable SportsTech Co, Used by Millions
Senior backend engineer at a remote-first sports technology platform serving millions of users and tens of thousands of amateur sports organizations. You build and scale event-driven Node.js/TypeScript microservices with SQL databases, APIs, queues, and caching, with a strong product focus and mentoring of other engineers.
Senior Rust Backend Engineer -NYC hybrid
Senior Rust engineer designing and building core services, APIs, and integrations for an event-driven transaction workflow platform that unifies traditional and tokenized financial assets. Stack centers on Rust, Kubernetes, gRPC, Kafka, and LLM/agentic tooling. NYC hybrid role.
Senior Backend Engineer (Java / Kotlin)
Senior Backend Engineer on a 6+ month C2C contract (hybrid in Phoenix) building secure, cloud-native payment and digital wallet services with integrations to Apple Pay, Google Pay, and Samsung Wallet. Core stack: Java/Kotlin, Spring Boot, Vert.x, Kafka, Couchbase, and OpenShift.
Senior Python Software Engineer – Azure, Distributed Systems & AI (Seattle)
Hands-on senior Python backend engineer who designs, ships, and operates production applications on Microsoft Azure — building distributed, resilient services, diagnosing live incidents, and running CI/CD and observability. Integrating LLMs (OpenAI/Azure OpenAI, RAG) into production apps is a plus; it's a software engineering role, not data/ML research.
Principal Backend Engineer (Applied AI)
Hands-on principal backend engineer at a venture-backed applied AI startup digitizing civil/structural/MEP engineering firms. Builds and owns backend services and APIs, production LLM/RAG/agentic systems for document parsing and workflow automation, and event-driven architecture alongside the CTO; on-site in NYC five days a week using Kotlin/Python and AWS.
Python Developer/AI Engineer
18-month W2 contract via staffing firm Matlen Silver to design and build a GenAI platform and business use cases in NYC/Jersey City. Day-to-day is hands-on production Python engineering — FastAPI APIs, backend services, and AI integrations — with LLM/RAG knowledge as a secondary skill.
Sr Python Developer [W2 ONLY, No C2C] [Charlotte, NC]
Senior Python full-stack developer on a long-term W2-only contract for a Fortune 500 food-services client: design, build, and deploy scalable web apps, microservices, and serverless services on AWS using Python (FastAPI/Flask/Django), React/Vue/Angular, Docker/ECS, and CI/CD pipelines.
Python Developer
6+ month onsite contract in Rutherford, NJ with long-term potential, placed at a financial-industry client: architecting a hybrid-cloud platform for large-scale quantitative pricing — job orchestration, event-driven lifecycle management, ML anomaly monitoring, and secure data movement — mainly with Python and C, plus Docker/Kubernetes and AWS/GCP.
Python Developer
6-month onsite contract in NYC for a Senior Python Developer to build and support applications for equity trading and post-trade processing — trade lifecycle events, corporate actions, and P&L — using Python (pandas, Polars, NumPy), Kafka/Avro, FastAPI/Flask REST APIs, and SQL databases.
Lead Full Stack Application Developer - Java & React - Local to St Pete, FL
Lead full-stack developer (hybrid onsite, local to Tampa Bay/St. Pete, W2 only) building and supporting enterprise applications with React 19/TypeScript front ends and Java/Spring Boot REST back ends, applying AI-assisted development tools, plus technical leadership, code reviews, and mentoring.
Python / React Developer – Front Office FX Technology
Full-stack developer embedded on a global investment bank's FX trading desk in New York, building web-based pricing, analytics, and trade lifecycle tools for traders and sales. Core stack is Python (pandas, APIs), React, and SQL, with migration of legacy Excel/VBA tools onto an industrialized platform.
Full Stack Python JavaScript Developer with any Capital Markets
6-month contract, 5 days on-site in New York, for a hands-on Python full-stack developer building and supporting the Stark platform for an Equity Derivatives / Quantitative Investment Strategies business — Python services, web UIs, APIs, and data integrations with market-data systems like Bloomberg. Pay is hourly: $64/hr W2 (US citizens/Green Card) or $77/hr C2C (H1B).
Senior / Lead Golang Developer | Event-Driven Architecture
Senior/Lead Golang engineer based in Denver (hybrid, 3 days/week onsite) who will own the decomposition of a legacy monolith into event-driven Go microservices at massive scale (100M+ users, 6B HTTP requests/day), mentor engineers, and shape technical direction. Hired through a recruiting agency; no visa sponsorship offered.
Senior Golang Engineer
Senior Golang backend engineer at Jumpspeak, an AI-powered language-learning startup, building and scaling backend systems for AI conversations, speech processing, content ingestion pipelines, and personalized lessons for millions of users. Core stack includes Go, PostgreSQL, Redis, message queues, and cloud infrastructure.
Senior Node.js Developer
Contract role via staffing firm SGA for a regulatory client in Woodbridge, NJ or the DMV area: design, build, test, and deploy APIs and web components with Node.js (Express/NestJS) on the backend and Angular on the frontend, using AWS serverless (Lambda) and fully automated CI/CD pipelines in an Agile team.
Engineering Manager - Flights FinOps
Engineering Manager for Booking.com's newly formed Flights FinOps team in Amsterdam, leading engineers to greenfield-build financial operations systems — payout orchestration, settlement, reconciliation, and exception handling — using event-driven, AWS-native backend architectures built for scale, traceability, and auditability.