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12-month contract (Montreal, 4 days on-site, Fridays remote) for a Python Test Software Developer: designing, coding, testing, debugging and troubleshooting Python applications in an agile team. Core stack is Python and C++, with work involving multithreading, data sharing and APIs.
A 12-month W2 contract role for a Principal Java Developer, fully onsite in Iselin, NJ, building backend services with Java 17, Spring Boot 3.x, and microservices backed by Oracle, plus Angular on the frontend.
IO Tech Solutions is hiring a remote C# Engineer (Hong Kong-based listing) to build, optimize, and maintain high-performance, low-latency C#.NET trading infrastructure for crypto market-making — including real-time order management, risk analysis, and exchange/market data integrations — working closely with traders and quantitative analysts.
How You Will Contribute And What You Will Learn Analyze, design, and implement new features following FWA SW architecture guidelines and quality standards. Write clean, efficient, and maintainable code while…
Long-term contract role for a senior (9+ years) Java backend lead placed via Envision Technology Solutions at a client site in Berkeley Heights, NJ or Omaha, NE. Day to day: designing and maintaining scalable backend services and RESTful APIs with Java, Spring Boot, and relational databases, using Git in Agile/Scrum.
Software Engineer II building object-oriented, multithreaded Java applications for satellite ground systems that support national security missions. Day to day covers the full SDLC in an Agile environment with exposure to AWS, microservices, Docker, Kubernetes, DevSecOps and CI/CD; onsite in Aurora, CO with an active TS/SCI clearance and U.S. citizenship required.
Hands-on senior Java engineer building high-performance, low-latency algorithmic trading infrastructure (EMS, SOR, pricing and routing engines) for crypto and traditional asset classes at a digital-assets fintech. Day to day: design trading systems, optimize performance, keep platforms stable for 24x7 trading, and work directly with traders.
Backend Java Developer building the core trading platform of a Hong Kong cryptocurrency exchange (a client of IO Tech Solutions): implementing REST/WebSocket APIs and a high-concurrency 7×24 trading system. Core stack: Java, Spring Boot/Cloud, MyBatis, Redis, Kafka, Elasticsearch; open to 1–5 years' experience and fresh graduates.
Senior C++ developer designing high-performance Linux software for Imagry's autonomous driving system, integrating AI modules, hardware interfaces, and sensor data. Day-to-day work spans C++ services/libraries, performance profiling, multithreaded debugging, testing, and CI tooling.
iOS engineer at Gismart's Radiotech music-apps division, developing and modernizing iOS apps with Swift, SwiftUI and UIKit, evolving modular architecture, and preparing/migrating shared logic to Kotlin Multiplatform. Day to day includes code reviews, CI/CD and release work, performance tuning, and using AI coding tools like Cursor or Claude Code.
Recruiting firm IO Tech Solutions is sourcing senior C++ engineers for client mandates at tier-1 investment banks, buy-side trading firms, and digital-asset firms. Day to day: building and optimizing low-latency, high-throughput trading systems — execution, order management, exchange connectivity — in modern C++ on Linux, using FIX and native protocols.
Leads machine learning projects end to end for a client — from defining models with data scientists to building data pipelines, deploying production ML on cloud, and owning the ML platform roadmap. Core stack: Python/Java/Scala, GenAI tools (LangChain, RAG), ML libraries (XGBoost, TensorFlow/PyTorch), and AWS/GCP with SageMaker.
Senior Java/full-stack engineer building and modernizing trading and portfolio accounting platforms for a global financial institution's Private Wealth Management Technology team in Hong Kong. Day-to-day work centers on high-performance microservices, event-driven streaming (Kafka/MQ), and low-latency distributed systems using Java, Spring Boot, and relational databases like DB2.
Backend engineer building the core of a cryptocurrency trading platform: Java-based trading infrastructure, RESTful/WebSocket APIs for market data and order execution, and a high-concurrency 7x24 trading system. Stack centers on Java, Spring Boot/Cloud, MyBatis, Redis, Kafka, and Elasticsearch.
Develops and optimises real-time embedded C/C++ software for 5G NR PHY platforms on ARM-based embedded Linux, collaborating with PHY, hardware and system teams and applying SIMD, multithreading and hardware acceleration to meet real-time constraints. Hybrid working in Southampton, UK.
Designs and builds scalable Python backend systems — REST APIs, MongoDB/Redis data models, and distributed systems — powering AI-driven products for investment firms and financial institutions. Shapes technical direction, mentors engineers, and works hybrid in New York City.
Senior backend engineer who designs, builds, and scales Java/Spring Boot microservices and RESTful APIs — working on service communication, asynchronous messaging, database tuning, security (OAuth2/JWT), and resiliency patterns in distributed, containerised environments.
Hands-on backend Java role at a scaling FinTech in Newcastle, modernising a C++ trading system into a scalable, high-performance real-time Java platform for Front Office traders. Involves architectural ownership and use of AI-assisted tools like Claude; salary up to £120k plus bonus.
Saransh Inc is hiring a Java Full Stack Developer in Montreal (onsite from day 1) to modernize a market risk limit monitoring system into Java Spring Boot microservices communicating via Kafka, backed by MongoDB and an in-house React-based UI framework. Day-to-day work spans Core Java, Spring, REST APIs, and React front-end development.
Contract, onsite (from day 1) backend developer role in Montreal building server-side applications with Core Java and the Spring ecosystem (Spring MVC, Spring Boot, REST APIs, JSON). Candidates need strong CS fundamentals and DevOps tooling experience (Git, Jenkins, JIRA); Kafka and MongoDB are nice-to-haves.
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