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11,088 Kotlin jobs

Open roles that use Kotlin for Android and JVM backends.

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11.1K jobs
Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
238 views 5 days ago

Software Engineer II, Full Stack (Card Acquisition)

Open 18d RemoteNorth AmericaMiddle 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

Software Engineer II on Affirm's Card Acquisition team, building and scaling the mobile and web experiences that onboard new card users. Day to day: shipping mobile apps (React Native/native), web apps (React/Vue) and APIs at scale (Kotlin/Python), plus on-call support, code reviews, and cross-functional collaboration with product, design, and analytics.

Analytics API CAD Kotlin Python +3 skills
133K – 183K CAD
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
194 views 5 days ago

Software Engineer II, Backend (Card Integrations and Payments Experience)

Open 18d RemoteEuropeMiddle 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

Backend engineer on Affirm's Card Checkout team, building and operating the systems behind Affirm Card's in-app checkout experience. Day to day: breaking projects into deliverable phases, shipping backend services, collaborating with product/design/analytics, and sharing on-call duties. Stack includes Python or Kotlin, AWS, MySQL, and Kubernetes.

Analytics AWS Distributed Systems Kotlin Kubernetes +3 skills
259K – 379K PLN
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
252 views 5 days ago

Software Engineer II, Backend (Card Integrations and Payments Experience)

Open 18d RemoteEuropeContractMiddle 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

Backend engineer on Affirm's Card Checkout team, building and operating the scalable systems behind the in-app Affirm Card checkout experience, with on-call duties. Core stack: Python or Kotlin, AWS, MySQL, Kubernetes. Remote within Spain; visa sponsorship available.

Analytics AWS Distributed Systems Kotlin Kubernetes +2 skills
73K – 109K €
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
61 views 5 days ago

Manager, Software Engineering (Loans Lifecycle)

Open 17d RemoteNorth America 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.
United States
Remote US

Engineering manager leading Affirm's Ledger Engineering team (Loans Lifecycle), setting year-long technical strategy and owning operations for an audit-grade financial ledger platform. Core stack includes Python or Kotlin, AWS, MySQL, Spark, and Kubernetes in a highly regulated fintech environment.

Analytics AWS Distributed Systems Kotlin Kubernetes +3 skills
204K – 290K $
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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
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
125 views 5 days ago

Senior Product Security Engineer

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.
United States
Remote US

Senior security engineer at Affirm who embeds with product teams to build security into every phase of the development lifecycle — threat modeling, architecture reviews, and secure code review. Core stack spans web app security, Python/Kotlin/Java on AWS/Azure, OWASP, SAML/OAuth2, and PCI-regulated environments.

Authentication AWS Azure CI/CD Cloud +7 skills
173K – 255K $
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
189 views 5 days ago

Senior Software Engineer, Fullstack (Repayments UX)

New 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 full-stack engineer on Affirm's Europe-based Repayment UX team, building and owning the user journeys through which 20M+ people repay over $40B in loans yearly. Day to day: leading delivery of quarterly goals, coding React/React Native frontends and Python/Kotlin backends, plus on-call support.

Agile Analytics Kotlin Python React +2 skills
86K – 122K €
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
226 views 5 days ago

Software Engineer II - CIAM

New RemoteNorth AmericaMiddle 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

Mid-level backend engineer on Affirm's Information Security team building customer identity and access management (CIAM): registration, login, MFA, step-up auth, and account lifecycle flows for B2C/B2B. Day to day you ship backend services and APIs in Python or Kotlin and integrate identity platforms like Okta, Auth0, and ForgeRock.

API Auth0 Authentication CAD IAM +4 skills
133K – 183K CAD
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
247 views 5 days ago

Software Engineer II, Fullstack (Repayment UX)

New RemoteEuropeContractMiddle 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

Full-stack engineer on Affirm's Europe-based Repayment UX team, building and operating the journeys borrowers use to repay loans at scale. Backend work in Python or Kotlin with React/Vue web frontends, including on-call duties. Fully remote within Spain.

Agile Analytics Kotlin Python React +2 skills
73K – 109K €
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
207 views 5 days ago

Software Engineer II, Fullstack (Repayment UX)

New RemoteEuropeMiddle 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

Full-stack engineer on Affirm's Repayment UX team, building and operating the user journeys that let 20M+ customers repay loans (over $40B/year). Backend work in Python or Kotlin plus web frontends in React/Vue, with on-call ownership and agile delivery. Remote anywhere in Poland.

Agile Analytics Kotlin Maven Python +3 skills
259K – 379K PLN
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
147 views 5 days ago

Staff Software Engineer, Backend (Recoveries)

New RemoteEuropeStaff 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

Staff backend engineer on Affirm's Recoveries team (Repayments), setting technical strategy for the platform that recovers value from charged-off loans—partner integrations, payments and remittances, reconciliation, bankruptcy workflows, and customer-facing recovery experiences. Core stack: Python, Kotlin, AWS, MySQL, Kubernetes. Remote anywhere in Poland.

Analytics AWS Kotlin Kubernetes Maven +4 skills
365K – 485K PLN
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
154 views 5 days ago

Staff Software Engineer, Backend (Recoveries)

New RemoteEuropeStaff 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

Staff backend engineer on Affirm's Recoveries team, setting year-scale technical direction for the platform that recovers value from charged-off loans — partner integrations, payments, reconciliation, bankruptcy workflows, and customer-facing recovery experiences. Built with Python, Kotlin, AWS, MySQL, and Kubernetes; remote in Spain with an on-call rotation.

Analytics AWS Kotlin Kubernetes MySQL +3 skills
103K – 139K €
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
215 views 5 days ago

Staff Software Engineer, Backend (Observability)

New RemoteNorth AmericaStaff 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

Technical lead for Affirm's Observability team: hands-on backend work owning a 200+ TB/day telemetry pipeline (metrics, logs, traces) across 80+ Kubernetes clusters, plus setting the roadmap, mentoring six engineers, designing log sampling, and building observability into AI-assisted development. Stack includes Python/Kotlin, AWS, Flink, Kafka, OpenTelemetry, Terraform.

Agentic AI AI Analytics AWS Distributed Systems +9 skills
204K – 290K $
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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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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
158 views 5 days ago

Software Engineer II, Backend (Payments)

New RemoteUKMiddle 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

Backend engineer on Affirm's Consumer Payments team, building and operating reliable, scalable payment systems that move billions of dollars a year. Day-to-day involves delivering project phases, designing APIs and backend services, and on-call support, using Python or Kotlin with AWS, MySQL and Kubernetes.

Analytics API AWS Distributed Systems Kotlin +3 skills
101K – 149K £
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Affirm Backed by a16zBacked by LightspeedBacked by Founders Fund
181 views 5 days ago

Software Engineer II, Full Stack (Card Pre-Swipe Experience)

New RemoteNorth AmericaMiddle 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

Full-stack engineer (level II) building Affirm Card's pre-swipe/checkout experience: customer-facing web features in React or Vue backed by Python or Kotlin services running on AWS, MySQL, and Kubernetes. The role includes phased project delivery, cross-functional collaboration, and on-call support for checkout-critical systems.

Analytics API AWS CAD Distributed Systems +6 skills
133K – 183K CAD
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HIRECLOUT
89 views 5 days ago

Senior Full Stack Software Engineer (USA)

New North AmericaContractSenior
United States

Senior full-stack engineer at a health & well-being technology company, directing AI agents to generate code, tests, and reviews while owning system design, API/data model decisions, and production accountability. Requires 5+ years full-stack experience (Java/Python/C#/Kotlin/Go), AWS/Azure, Kafka, and regulated-data (PHI/HIPAA) experience.

Agentic AI AI API AWS Azure +19 skills
150K – 200K $
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