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Backend developer Jobs in Boulder, CO

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Backend developer • boulder co

Last updated: 1 day ago

Remote Kotlin Engineer - AI Trainer

SuperAnnotateSuperior, Colorado, US
Remote
Full-time

As a remote, hourly paid Kotlin Engineer, you will review AI-generated responses and generate high-quality Kotlin-focused content, evaluating the reasoning quality and step-by-step problem-solving ...Show more

Sr Software Engineer

InfleqtionBoulder, CO, US
Full-time
Quick Apply

We are seeking self-motivated, energetic individuals with exceptional problem-solving and technical skills to help drive our.We break down barriers between disciplines, stepping in wherever we can ...Show more

Remote Cloud Computing Expert - AI Trainer ($55-$75 per hour)

MercorBoulder, Colorado, US
Remote
Full-time

Role Overview** Mercor is partnering with leading AI labs on **Project Atlas** — an initiative to build realistic enterprise environments that frontier AI agents are trained and evaluated in.We're ...Show more

Software Engineer (Backend C#) - MakeMusic

PeakswareLouisville, CO, US
Full-time
Quick Apply

Help Shape the Future of Music Creation and Education at MakeMusic.At MakeMusic, we believe music has the power to inspire, connect, and transform lives.For over three decades, we’ve been at the fo...Show more

Senior Technical Product Marketing Manager

Workday, Inc.Boulder, CO, USA
Full-time

We’re looking for a Senior Technical Product Marketing Manager to join the Workday Build & Platform team, driving adoption and growth of Build and platform technologies.This role requires deep fami...Show more

Senior Software Developer /.NET / WPF / Colorado

Motion RecruitmentBolder, Colorado, United States
Full-time +1

A software start-up based in Bolder, CO is looking for a Senior Software Engineer to join their team.You’ll work on the companies core product offering and serve a senior level resource on the team...Show more

STAFF FRONTEND ENGINEER

Fluid Consulting ServicesBoulder, CO, United States
Full-time

Fluid's client is seeking a senior frontend engineer to elevate a high-traffic React/TypeScript platform.This role focuses on frontend architecture, developer experience, and guiding best practices...Show more

Remote Software Engineer (AI-Native Platform & Integrations) - AI Trainer ($70-$110 per hour)

MercorBoulder, Colorado, US
Remote
Full-time +2

About Mercor’s talent network** **This is an open application for future contract opportunities that match your background and interests.Once you complete your profile and pass our AI interview, yo...Show more

Remote Backend Engineer Talent Network - AI Trainer ($70-$150 per hour)

MercorBoulder, Colorado, US
Remote
Part-time

About Mercor’s talent network** Join our Backend Engineer Expert Network to connect with leading AI labs and companies seeking your expertise.This is an open application for future contract opportu...Show more

Remote Software Engineer - AI Trainer ($40-$50 per hour)

MercorBoulder, Colorado, US
Remote
Full-time

Role Overview We’re hiring Software Engineers to build and ship apps for Mercor’s RL Studio platform.The role involves developing MCP servers and sometimes BUAs, integrating real software into sand...Show more

Virtual Data Collection Representative (Work-at-Home)

FocusGroupPanelLouisville, Colorado, United States
Remote
Part-time

Work From Home, Entry Level Data Entry Clerk As A Research Participant.We are looking for people who want to work remotely from home.You'll need an Internet connection and a mobile device or comput...Show more

Director of Community Engagement

Scout Clean EnergyBoulder, CO, US
Full-time
Quick Apply

As Scout’s Director of Community Engagement you will shape how Scout shows up in the project communities, design and implement engagement strategies, train internal teams, and provide high touch su...Show more

Lead Engineer | AI-Powered Governance Platform (DeFi)

C&D Talent AdvisoryBoulder, Colorado, United States
Remote
Full-time
Quick Apply

AI | DeFi | Data Infrastructure | Automation Systems.This role sits at the center of a major transformation — building an.This is not just backend engineering — this is.AI-native governance systems...Show more

Associate Principal - Tax Credit Advisory Services

Schneider ElectricBoulder, CO, United States
Full-time

Associate Principal Tax Credit Advisory Services.Schneider Electric has an opportunity for an Associate Principal Tax Credit Advisory Services in our Boulder, Colorado location with an option for r...Show more

Software Engineer (Backend C#) - MakeMusic

MakeMusicLouisville, Colorado, United States
Full-time

As Software Engineer you will be responsible for creating and supporting backend services that power our products, owning applications from inception through development, test, and release to produ...Show more

Product Test Developer I

SparkFun ElectronicsNiwot, CO, US
Full-time
Quick Apply

No matter your vision or skill level, our open source components, resources and online tutorials are designed to broaden access to innovative technology and make the road to a finished project shor...Show more

P28949 Sr Business Intelligence Developer

Sierra SpaceLouisville, CO
Full-time

At Sierra Space, we build the missions and systems that keep our world secure in the domain above Earth.Sierra Space team members share a spirit of innovation and collaboration and a belief that we...Show more

Staff / Sr Staff Full Stack UI Engineer

SciTecBoulder, CO, US
Full-time
Quick Apply

SciTec, a wholly owned subsidiary of Firefly Aerospace, is a dynamic non-traditional defense contractor that delivers advanced technologies in support of U.For the past forty-five plus years, we ha...Show more

Summer 2026 Sales Internship (Housing + Paid)

Forge MarketingBoulder, CO, US
Internship

Summer Sales Internship – Grit x Forge Marketing.Paid Internship | Housing Available | Leadership Opportunities | Summer 2026.Looking for a summer experience that challenges you and accelerates you...Show more

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Remote Kotlin Engineer - AI Trainer

Remote Kotlin Engineer - AI Trainer

SuperAnnotateSuperior, Colorado, US
30+ days ago
Job type
  • Full-time
  • Remote
Job description

As a remote, hourly paid Kotlin Engineer, you will review AI-generated responses and generate high-quality Kotlin-focused content, evaluating the reasoning quality and step-by-step problem-solving behind each solution. You will assess solutions for accuracy, clarity, and adherence to the prompt; identify errors in methodology or conceptual understanding; fact-check technical information; craft expert-level explanations and model solutions that demonstrate correct approaches; and rate and compare multiple AI responses based on correctness and reasoning quality. T

his role is with SME Careers, a fast-growing AI Data Services company and subsidiary of SuperAnnotate that provides AI training data for many of the world’s largest AI companies and foundation model labs, helping to improve the world’s premier AI models.

Key Responsibilities :

  • Develop AI Training Content : Create detailed prompts in various topics and responses to guide AI learning, ensuring the models reflect a comprehensive understanding of diverse subjects.
  • Optimize AI Performance : Evaluate and rank AI responses to enhance the model's accuracy, fluency, and contextual relevance.
  • Ensure Model Integrity : Test AI models for potential inaccuracies or biases, validating their reliability across use cases.

Your Profile :

  • 2+ years of hands-on Kotlin development experience.
  • Strong understanding of Kotlin null safety, coroutines, and functional idioms.
  • Professional software engineering experience using Kotlin for Android or backend services.
  • Minimum Bachelor’s degree in Computer Science or a closely related field.
  • Ability to critically evaluate idiomatic Kotlin style, design decisions, and architecture trade-offs.
  • Significant experience using large language models (LLMs) to assist with coding, debugging, and code review.
  • Excellent English writing skills with the ability to articulate complex technical concepts clearly.
  • Highly preferred : Experience with Ktor, Android Jetpack, and advanced coroutine usage in production systems.
  • Preferred : Merged pull requests in Kotlin open-source projects, competitive programming experience, or similar demonstration of strong problem-solving skills.
  • Experience reviewing app logic or mobile / backend architecture, with previous AI data training or model evaluation work strongly preferred and Minimum C1 English proficiency.