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8.8K jobs
Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
92 views 5 days ago

Senior Software Engineer, Backend (Marketing & Privacy)

Open 24d RemoteNorth AmericaSenior 6 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
Canada
Remote Canada

Senior backend engineer on Affirm's Marketing & Privacy Engineering team, building data pipelines, identity/event systems, and attribution and conversion measurement that tie marketing channels to signup and GMV outcomes. Core stack includes Python or Kotlin, AWS, MySQL, Kubernetes, Snowflake, dbt, and Airflow, plus marketing tech like GTM and GA4.

Airflow Analytics API AWS CAD +13 skills
153K – 213K CAD
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
155 views 5 days ago

Senior Software Engineer, Backend (Lakehouse Infra)

Open 21d RemoteNorth AmericaSenior 6 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
Remote Canada

Senior backend engineer on Affirm's Lakehouse Infra team, owning the data lake infrastructure that backs money- and loan-movement batch and analytics workloads. Day to day: leading delivery of team goals, keeping systems available and on-call, and building with Python/Kotlin, AWS, Kubernetes, and data tools like Iceberg, Spark, Flink, and Airflow. Remote within Canada.

Agentic AI Airflow Analytics AWS Backbone.js +16 skills
153K – 213K CAD
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
109 views 5 days ago

Senior Software Engineer, Backend (Comms Core)

Open 15d RemoteEuropeSenior 6 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
Poland
Remote Poland

Senior backend engineer on Affirm's Communications team, designing and operating the multi-region, multi-tenant messaging platform that reliably delivers billions of customer messages — building backend services, APIs, vendor integrations, and observability, with on-call duties. Core stack: Python/Kotlin, AWS, MySQL, DynamoDB, Kubernetes.

AI Analytics API AWS Developer Experience +8 skills
308K – 428K PLN
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
131 views 5 days ago

Senior Software Engineer, Backend (Comms Core)

Open 15d RemoteEuropeSenior 8 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
Spain
Remote Spain

Senior backend engineer on Affirm's Communications team building the high-availability platform that delivers billions of customer messages: designing multi-region, multi-tenant services, APIs, and third-party messaging vendor integrations, plus on-call participation. Stack: Python/Kotlin, AWS, MySQL, DynamoDB, Kubernetes. Remote within Spain.

AI Analytics API AWS Developer Experience +7 skills
86K – 122K €
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
191 views 5 days ago

Senior Software Engineer, Backend (Identity Data)

New RemoteNorth AmericaSenior 7 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
Remote US

Senior backend engineer on Affirm's Identity Engineering team, which handles consumer onboarding, authentication, and verification for its pay-over-time platform. Owns delivery of high-availability, low-latency services, leads engineers, and builds with Python/Kotlin on AWS, MySQL, and Kubernetes.

Analytics Authentication AWS Distributed Systems Kotlin +3 skills
173K – 255K $
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
183 views 5 days ago

Senior Software Engineer, Backend (Workload Safety)

New RemoteNorth AmericaSenior 7 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
Remote US

Senior backend engineer on Affirm's Workload Safety team, defining and enforcing standards for running workloads across 85+ Amazon EKS clusters — resource management, disruption handling, cluster scaling, and fleet-wide policy enforcement. Core tech: Kubernetes/EKS, Go or Python, OPA Gatekeeper/Kyverno, Karpenter.

API Automation EC2 EKS Kubernetes +6 skills
173K – 255K $
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
47 views 5 days ago

Senior Software Engineer, Backend (AI Platform)

New RemoteNorth AmericaSenior 8 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
Remote US

At Affirm, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. Affirm's engineering team is building a…

Agentic AI AI API AWS AWS Bedrock +10 skills
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
143 views 5 days ago

Senior Software Engineer, Backend (International)

New RemoteUKSenior 6 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
United Kingdom
Remote UK

Senior backend engineer on Affirm's Payments International team, building and operating bank and card payment systems for international markets (teammates across UK, Spain, Poland). Day-to-day involves leading delivery, designing scalable services, and on-call support, using Python or Kotlin, AWS, MySQL, and Kubernetes.

Analytics AWS Distributed Systems Kotlin Kubernetes +2 skills
120K – 168K £
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Solutis Tecnologias
17 views 5 days ago

Desenvolvedor (a) Back End Java Sr Híbrido São Paulo/SP

New On-siteLATAMSenior
Brazil
São Paulo, SP

Senior Java backend developer at Solutis working on large-scale digital projects for a financial institution, hybrid 3 days/week in São Paulo. Leads technical/architectural design of mission-critical microservices and APIs using Spring Boot, Kafka/RabbitMQ, Oracle/PostgreSQL, Docker/Kubernetes and AWS/Azure.

API AWS Azure CI/CD Cloud +19 skills
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Oxigent Technologies
42 views 5 days ago

Desarrollador .NET Senior - ERP Backend (Híbrido)

New HybridLATAMSenior
Colombia

Senior .NET developer at Oxigent Technologies building ERP functionality under a microservices architecture for a Barcelona-based project (relocation offered). Hybrid model with 3 remote days and 2 office days; stack includes C#, .NET Core, REST APIs, Azure DevOps, and MSTest/NUnit testing. Salary up to €50,000 gross per year.

API Azure Azure DevOps C# DevOps +5 skills
up to 50K €
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Factor IT
18 views 5 days ago

Back-end Developer Senior – Java / Spring Boot

New HybridLATAMSenior
Chile

Senior backend developer on a 3-month fixed-term contract, hybrid in Santiago, building Saga orchestration and BIAN domain microservices on GCP for a major Chilean bank's risk-evaluation engine modernization. Core stack: Java 21, Spring Boot 3, PostgreSQL/Cloud SQL, Cloud Pub/Sub, GKE.

API Apigee Cloud CQRS Event Driven Architecture +21 skills
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ServiceHunter AG - quitt, quinn
81 views 5 days ago

Senior Backend Developer

New HybridEuropeContractSenior
Switzerland
Zürich

Senior Backend Developer owns end-to-end backend modules for quinn ONE, a managed payroll platform built as a modular monolith in C#, .NET 10 and PostgreSQL, which runs payroll, salaries, insurance and tax filings for employers in Switzerland, Germany and the UK. The role covers data modelling, APIs, reliability, security and mentoring, working hybrid from Zürich Wiedikon.

Agentic AI AI API C# .NET +2 skills
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Vanguard System - Gruppo Global Sistemi
36 views 5 days ago

Senior Backend Java Developer – AI-Driven

New EuropeSenior
Italy
Lombardia

Senior backend Java developer at Vanguard System, the IT division of Gruppo Global Sistemi: design, build, and release robust backend services using Java and Spring Boot, creating RESTful APIs and microservices in an Agile/Scrum environment. Hybrid role with one onsite day per week in Milan; permanent contract with RAL 30K-40K.

Agile AI API Java REST +2 skills
30K – 40K €
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Betsson Group
52 views 5 days ago

Senior Backend Software Engineer (PHP/Java) - RaceBets

New LATAMSenior
Brazil
Mato Grosso

Backend engineer on Betsson's 12-person RaceBets team building a global horse-racing betting platform: PHP 8+ REST APIs and SQL services for web and B2B platforms, handling real-money betting, settlements, payments and third-party integrations, with occasional Java (BetX) debugging and optional Vue 3/TypeScript full-stack growth.

AI API Fintech Java PHP +6 skills
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Constructor.io
274 views 5 days ago

Senior Backend Engineer: Offsite Search Optimisation

New RemoteEuropeSenior
Germany
Munich

Senior backend engineer on Constructor's ecommerce search & discovery platform, working on offsite (SEO) search optimization: building and owning Python production services, SQL-heavy data work, and monitoring/debugging at billion-query scale. Fully remote; $80k–$120k plus stock options.

AI Analytics API E-commerce ELT +9 skills
80K – 120K $
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Niuro
127 views 5 days ago

Senior Backend Developer (.NET)

New RemoteLATAMContractSenior
Chile
Santiago

Senior backend engineer driving the migration of a US tax software company's legacy system to a .NET 8+ Clean Architecture backend: building secure Web APIs, tuning MySQL access with Dapper/EF Core, and integrating payment providers (Braintree, Paymentech). Fully remote contractor role, hired through Niuro, paid in USD.

API Authentication AWS Clean Architecture CQRS +13 skills
30K – 36K $
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i.Wonder
74 views 5 days ago

Senior Backend / Distributed Systems Engineer (Founding-Team Interest, Equity Only)

New North AmericaSenior
United States
San Francisco

Builds and operates the backend for i.Wonder's early-stage products — Wonderland (a persistent multiplayer world for AI creation) and Julius (a compound AI agent) — covering accounts, permissions, durable state, job queues, usage metering and secure APIs, primarily with TypeScript/Node.js and PostgreSQL. Equity-only founding-team interest listing.

Agentic AI AI API Api Design Authentication +12 skills
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Compass UOL
19 views 5 days ago

Java Backend | Sênior (Híbrido)

New HybridLATAMSenior
Brazil
São Paulo, SP, Brasil

Senior Java backend engineer at Compass UOL, working hybrid (2 days/week on-site in São Paulo) building and maintaining REST APIs and microservices. Core stack: Java, Spring Boot, SQL databases, Docker/Kubernetes, CI/CD, cloud (AWS/Azure/GCP) and messaging tools like Kafka.

Anthropic API AWS Azure CI/CD +20 skills
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Coderio
191 views 5 days ago

Senior Integration & Backend Engineer – Incident Management Platform

New RemoteLATAMContractSenior 6 questions
Argentina
Buenos Aires

Senior engineer building Coderio's centralized incident-management platform (Vantage): integrating alerting tools, Jira, and LLM AI agents into a Databricks lakehouse via production Python/FastAPI APIs, webhooks, and AWS S3 ingestion, with governed incident data models and human-in-the-loop AI workflows. 3-month contract (extendable to 6), on-site in Buenos Aires.

Agentic AI AI API Api Design API Gateway +34 skills
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Affle
68 views 5 days ago

Senior Backend Engineer

Open 17d RemoteEuropeSenior 1 question Europe

Senior Backend Engineer at Affle, an AdTech company, working on backend APIs, Java-based Real-Time Bidding (RTB) and Ad Exchange services, and Python reporting/data-processing pipelines. Day to day involves high-throughput, low-latency ad systems using Python, Node.js, Java, Kafka, SQL, Docker, and AWS, fully remote from Europe.

Agentic AI AI API Automation AWS +13 skills
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