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Senior Backend Engineer

New HybridUKSenior

Senior Backend Engineer building and operating scalable backend services that power Voice AI products for the telecoms industry, integrating ML pipelines with the backend core. Core stack: Go and Python on Kubernetes, with Postgres, Redis, NATS, Istio, ArgoCD, Prometheus, Grafana, AWS and Terraform. Hybrid role, three days per week in the London office.

AI Argo CD AWS Cloud Conversational AI +11 skills

Senior Backend Engineer — Scalable Data & APIs

La Fosse is recruiting a Senior Backend Engineer for a world-leading sports technology platform in London. The engineer designs APIs and distributed systems powering large-scale data pipelines connecting player identities and game metadata, with mentoring, architectural input, and technical direction in a small, growing team.

API Data Pipelines Distributed Systems

Senior C#/.NET Backend Engineer – Quant Platform

Mondrian Alpha in London is hiring a Senior C#/.NET Backend Engineer to build a quantitative platform that calibrates and distributes live and end-of-day curve and volatility models across the investment business. Day to day, the engineer designs scalable, resilient distributed services and contributes to production systems, observability, and high-performance software.

C# .NET Observability

Senior Java Backend Engineer – Hybrid, Growth & Benefits

New HybridUKSenior

VanRath (Belfast) is recruiting a Senior Java Backend Engineer to build and enhance large-scale backend platforms supporting mission-critical enterprise applications used worldwide. Day to day involves owning features from design through deployment using modern Java, cloud platforms, and DevOps practices, in a hybrid working setup.

Cloud DevOps Java

Développeur Backend Senior Python Django et PHP - Saas - Paris (H/F)

New EuropeSenior

Senior backend developer building features on a legacy PHP core and newer Python/Django microservices for a SaaS platform in Paris, while reviewing code, mentoring developers, tuning SQL, running CI/CD and handling production incidents, with a short-term path to Lead Developer.

API CI/CD Django Flux JavaScript +6 skills

Ingénieur Backend Senior - Python/Django & PHP

New EuropeSenior

Onyx-Conseil is hiring a senior backend engineer in Paris to evolve a mixed PHP/Python/Django platform with a Vue.js/TypeScript frontend. Day to day: architecture, code reviews, setting standards, SQL performance tuning, mentoring developers, and operational maintenance, with a short-term path to Lead Developer.

Django PHP Python SQL TypeScript +1 skills

Senior Backend Engineer, Platform Identity & Entitlements

New North AmericaSenior

Senior backend developer on Coveo's Platform Identity & Entitlements team in Montreal, building and owning end-to-end the central services customers use to create, manage, secure, and govern their Coveo organization, with a focus on reliability, scalability, and maintainability.

Senior Backend Engineer, Telematics & Safety (Hybrid)

New HybridNorth AmericaSenior

Lyft's Toronto team (hybrid) seeks a Senior Backend Engineer to build telematics data pipelines and scalable services that power driver-safety and insurance risk features. The role involves working with data scientists and PMs to productionize models, reduce latency, and improve real-time predictions in a large distributed system.

Senior C# Backend Engineer — Performance & Refactor Focus

New North AmericaContractSenior

Cynet Systems is hiring a Senior C# Backend Developer in Montréal, QC on a contract basis. The role focuses on backend/server-side development and standalone desktop applications, using multithreading, data structures, and algorithms to improve performance, with a stack including C#, Visual Studio, SQL Server, gRPC, NHibernate, WinForms, WCF, and REST APIs.

API BDD C# gRPC Multithreading +6 skills

Senior Backend Engineer (.NET)

New On-siteNorth AmericaSenior

Senior backend engineer building and maintaining scalable C#/.NET services and APIs for Comm100's digital customer engagement platform, owning features end to end from design through deployment. Core stack includes .NET/ASP.NET Core, Entity Framework, and SQL databases, with CI/CD and AI-powered dev tools.

AI API CAD CI/CD C# +5 skills

105K – 140K CAD

Senior C# Backend Developer

New North AmericaContractSenior

Contract role via staffing firm Cynet Systems for a senior C#/.NET backend developer at a client in Montreal, QC. Day to day: backend/server-side and standalone desktop development, refactoring underperforming code, multithreading, and applying TDD/BDD with SQL Server, gRPC, NHibernate, WinForms, WCF, REST and Swagger.

Agile API BDD C# .NET +12 skills

Senior Backend Developer - Platform Identity and Entitlements

New North AmericaSenior

Senior backend developer on the Platform Identity & Entitlements team, building and owning the central Coveo Platform services (user management, permissions, licensing) end-to-end, from design and implementation to production monitoring. Core stack is Java in a cloud environment, with Spring Boot, AWS, Terraform, and Kubernetes as assets.

AI AWS CI/CD Cloud Cloud Native +6 skills

Senior Backend Engineer - Go/Rails for Fintech & KYC

Hong Kong SAR China

A senior backend engineer in Hong Kong builds scalable backend services for fintech projects, focusing on user sign-up, KYC, and EDD flows, while expanding products and improving existing systems. Day-to-day work is hands-on development in Golang and Ruby on Rails.

Fintech Go Rails Ruby

Senior Java Backend Engineer – Risk & Regulatory Tech

Hong Kong SAR China

PFCC Group is hiring a Senior Java Backend Engineer to design, build, and scale operational processing engines and global regulatory reporting systems for a tier-1 financial institution client in Hong Kong, working with Java microservices, Kafka, IBM MQ, and SQL tuning across PostgreSQL, DB2, Sybase and Oracle.

Db2 Java Kafka Microservices Oracle +2 skills

Senior Backend Engineer - C#/.NET + AWS, Full Ownership

A senior backend engineer in Christchurch, NZ who owns core backend services and APIs end to end — design, deployment, and production support — using C#/.NET, AWS, SQL, and CI/CD, while influencing architecture, mentoring peers, and adopting AI-assisted development tools.

AI API AWS CI/CD C# +2 skills

Senior Java Backend Engineer - Remote & Microservices

Designs and implements scalable, compliance-focused backend services at Binance using Java and Spring, collaborating with product managers to ensure performance and security while tuning distributed systems to tackle regulatory challenges in a fast-paced crypto environment.

Distributed Systems Java Spring

astek singapore innovation technology pte. ltd.

Senior Golang Backend Engineer — EV Charging Platform

Senior Golang Engineer building a cloud-native EV charging platform using microservices, RESTful APIs, and event-driven workflows with PostgreSQL, Docker, and Kubernetes.

API Cloud Cloud Native DevOps Distributed Systems +7 skills

Senior Go Backend Engineer | High-Performance Microservices

A senior backend engineer designs and builds high-performance Go microservices and core modules for a Singapore IT startup serving the games and e-commerce space. Day to day involves distributed systems work, Linux networking, and collaborating with cross-functional teams.

Distributed Systems E-commerce Linux Networking

LUXOFT INFORMATION TECHNOLOGY (SINGAPORE) PTE. LTD.

Senior Java Backend Engineer - E-Trading Platform

A senior backend engineer builds and enhances e-trading modules for an in-house FX e-commerce platform using Core Java and Spring Boot, exposing RESTful and streaming APIs. The role involves close collaboration with front-end developers and business stakeholders plus continuous improvement of build and deployment automation.

API Automation E-commerce Java REST +1 skills

GRABTAXI HOLDINGS PTE. LTD.

Senior Backend Engineer - Scalable Transport App

Senior Backend Engineer at Grab building and maintaining scalable backend services for the Transport app in Singapore, owning delivery end-to-end from problem definition to production release. Day-to-day includes leading code reviews, supporting on-call operations, and establishing development standards.