AI Backend Engineer Job at Randstad (Tokyo)

Backend Engineer, AI Content Agents

We’re building the future of AI driven marketing, one content agent at a time. A...

Location

United States

Salary:

180000.00 - 320000.00 USD / Year

Hightouch

Expiration Date

Until further notice

Requirements

Strong backend architecture skills
Curiosity
Product intuition
Ability to bring ideas from napkin sketch to production reality
Comfortable shipping a full stack feature and experimenting with an LLM workflow
Ability to build APIs, data models, and orchestration layers
Experience building and maintaining backend services, APIs, and data models
Experience developing new agent behaviors from prototypes to scalable production systems
Experience extending web layers with new features
Experience improving reliability, observability, and performance across a stack

Job Responsibility

Design and ship intelligent systems that understand a company’s data, generate on-brand content, and collaborate with humans in real time to deliver creative work
Build APIs, data models, and orchestration layers that make our agents reliable, debuggable, and fast
Partner closely with product and design to deliver experiences that make AI feel natural, useful, and trustworthy
Building and maintaining backend services, APIs, and data models that power AI-generated marketing content
Developing new agent behaviors, taking them from quick prototypes to scalable production systems
Extending our existing web layer with new features that connect directly to AI workflows
Improving reliability, observability, and performance across our stack
Collaborating cross functionally to ship user facing features end-to-end, from design to deployment

Fulltime

Software Engineer, Backend (AI Agent)

At Cresta, the AI Agent team is on a mission to create state-of-the-art AI Agent...

Location

Canada , Toronto

Salary:

Not provided

Cresta

Expiration Date

Until further notice

Requirements

Bachelor’s degree in Computer Science or a related field
2+ years of experience in backend system architecture, cloud services, or related technology fields
Knowledge in designing and maintaining clear and robust APIs with a strong understanding of protocols including gRPC, REST
Experience in high-performance database schema design and query optimization, including knowledge of SQL and NoSQL databases
Experience in containerized application deployment using Kubernetes and Docker in microservices architectures
Experience with cloud environments such as AWS, Azure, or Google Cloud, with a strong understanding of cloud security and compliance standards

Job Responsibility

Design, develop, and maintain scalable and robust backend architectures for Cresta’s AI Agent solutions and proprietary models
Collaborate with cross-functional teams including frontend engineers, machine learning engineers to ensure seamless integration of AI Agents into Cresta’s customer solutions
Lead initiatives to enhance system scalability and reliability in production environments, focusing on backend services that support AI functionalities
Drive efforts to optimize server response times, process large volumes of data efficiently, and maintain high system availability
Innovate and implement security measures, cost-reduction strategies, and performance improvements in backend systems supporting AI Agents

What we offer

We offer Cresta employees a variety of medical, dental, and vision plans, designed to fit you and your family’s needs
Paid parental leave to support you and your family
Monthly Health & Wellness allowance
Work from home office stipend to help you succeed in a remote environment
Lunch reimbursement for in-office employees
PTO: 3 weeks in Canada

Fulltime

Senior Software Engineer, Backend (AI Agent)

At Cresta, the AI Agent team is on a mission to create state-of-the-art AI Agent...

Location

Canada , Toronto

Salary:

Not provided

Cresta

Expiration Date

Until further notice

Requirements

Bachelor’s degree in Computer Science or a related field
5+ years of experience in backend system architecture, cloud services, or related technology fields
Proficient in designing and maintaining clear and robust APIs with a strong understanding of protocols including gRPC, REST
Previous experience working with Virtual Agent or AI Agent systems
Experience in high-performance database schema design and query optimization, including knowledge of SQL and NoSQL databases
Experience in containerized application deployment using Kubernetes and Docker in microservices architectures
Experience with cloud environments such as AWS, Azure, or Google Cloud, with a strong understanding of cloud security and compliance standards

Job Responsibility

Design, develop, and maintain scalable and robust backend architectures for Cresta’s AI Agent solutions and proprietary models
Collaborate with cross-functional teams including frontend engineers, machine learning engineers to ensure seamless integration of AI Agents into Cresta’s customer solutions
Lead initiatives to enhance system scalability and reliability in production environments, focusing on backend services that support AI functionalities
Drive efforts to optimize server response times, process large volumes of data efficiently, and maintain high system availability
Innovate and implement security measures, cost-reduction strategies, and performance improvements in backend systems supporting AI Agents

What we offer

We offer Cresta employees a variety of medical, dental, and vision plans, designed to fit you and your family’s needs
Paid parental leave to support you and your family
Monthly Health & Wellness allowance
Work from home office stipend to help you succeed in a remote environment
Lunch reimbursement for in-office employees
PTO: 3 weeks in Canada

Senior AI Product Engineer, Backend

Our Backend Engineering team builds all of the highly scalable distributed servi...

Location

United States

Salary:

125000.00 - 225000.00 USD / Year

Arize

Expiration Date

Until further notice

Requirements

5+ years of experience working with high-performance backend systems
Strong experience writing Go, Python, TypeScript/Node, Java, or similar server programming languages
Enthusiasm and interest in the AI and LLM ecosystem, with a desire to learn and stay updated on emerging technologies
Previous work building and operating highly complex SaaS platforms/systems
Knowledge of working with public clouds & container orchestration - AWS, GCP, Azure, Kubernetes, etc.

Job Responsibility

Write maintainable, scalable, and performant backend code primarily in Go, Java, and Python, with opportunities to work in TypeScript
Build high-volume and highly available analytics systems
Design and build APIs specific to our customers’ Machine Learning and LLM workflows
Prototype, optimize, and maintain scalable backend services that power the Arize core platform
Extend, and contribute back to, open source OLAP databases and distributed message queue frameworks
Develop and integrate collection tools for robust monitoring of ML and LLM pipelines
Research and implement cutting-edge visualization & dimensionality reduction algorithms in a distributed environment
Collaborate with our product, design, and directly with customer engineering teams to enhance and expand our product offerings
Contribute to the build our own in-house AI Agents

What we offer

competitive equity package
comprehensive benefits package, including medical, dental, vision
a 401(k) plan
unlimited paid time off
a generous parental leave plan
additional support for mental health and wellness
WFH monthly stipend to pay for co-working spaces

Fulltime

Experienced Backend Software Engineer - API AI

As a core member engineer of the Redis AI API team, you will play a pivotal role...

Location

Bulgaria

Salary:

Not provided

Redis

Expiration Date

Until further notice

Requirements

4+ years developing backend applications
Hands-on experience building, testing, deploying in production
Experience with databases
Exposure to CI/CD and deployment tooling (e.g.: GitHub actions, Argo CD, Kubernetes, Terraform, etc)
Experience delivering high-quality software at scale in Java, Kotlin, Python, Golang, or other languages
Self-directed, ambitious, and eager to learn new skills and technologies
Bachelor’s or Master’s Degree in Computer Science or Related Field

Job Responsibility

Design and Develop a new set of cloud services. Lead the design and development of AI-driven features, ensuring scalability, reliability, and performance
Drive Innovation. Experiment with cutting-edge AI technologies and frameworks, and contribute to Redis’ evolution in the AI space
Collaborate across teams. Work closely with the broader engineer team, Support, DevOps, leading the fastest NoSQL databases in the world

What we offer

Competitive compensation package formed by salary and equity grants
25 days of flexible vacation time
Hybrid working options from both home and the office
Home internet & phone monthly allowance
One-time home-office setup allowance
Health and dental insurance for you
Personal life insurance
Critical Illness Cover
Lunch and snacks in the office

Staff Backend Engineer, Speech AI

Our intelligent runtime must seamlessly connect to foundational models to power ...

Location

United States , Mountain View

Salary:

200000.00 - 300000.00 USD / Year

Inworld AI

Expiration Date

Until further notice

Requirements

A BA/BS degree in Computer Science or a related technical field, or equivalent practical experience
5+ years of professional experience in software development, with a proven track record of shipping high-quality, user-facing products
Strong product sense and an ability to think critically about user experience and business impact
Demonstrated experience in building and scaling production-grade backend APIs and distributed systems
Strong proficiency in Python and professional experience with one or more of the following: Java/Kotlin, or Go
Hands-on experience with containerization (Docker) and deploying services on orchestration platforms like Kubernetes
A solid foundation in data structures, algorithms, and system design

Job Responsibility

Own features end-to-end, from collaborating on the initial concept with product managers to shipping and monitoring the final product
Translate product requirements and user needs into robust, scalable, and maintainable backend services and APIs
Design, build, and launch user-facing APIs and backend systems in Python, Java/Kotlin, and Go that deliver seamless voice experiences
Partner closely with Product Managers and ML engineers to define scope, identify technical trade-offs, and drive the product roadmap forward
Write high-quality, production-grade code that powers real-time audio processing, model inference, and complex data pipelines
Champion engineering and product excellence, with a focus on delivering tangible value to our users quickly and iteratively

What we offer

bonus
equity
benefits
relocation assistance

Fulltime

Senior AI Engineer

As a Senior AI Engineer on our AI Engineering team, you will be responsible for ...

Location

Canada; United States

Salary:

160000.00 - 260000.00 USD / Year

Apollo.io

Expiration Date

Until further notice

Requirements

8+ years of software engineering experience with a focus on production systems
1.5+ years of hands-on LLM experience (2023-present) building real applications with GPT, Claude, Llama, or other modern LLMs
Production LLM Applications: Demonstrated experience building customer-facing, scalable LLM-powered products with real user usage (not just POCs or internal tools)
Agent Development: Experience building multi-step AI agents, LLM chaining, and complex workflow automation
Prompt Engineering Expertise: Deep understanding of prompting strategies, few-shot learning, chain-of-thought reasoning, and prompt optimization techniques
Python Proficiency: Expert-level Python skills for production AI systems
Backend Engineering: Strong experience building scalable backend systems, APIs, and distributed architectures
LangChain or Similar Frameworks: Experience with LangChain, LlamaIndex, or other LLM application frameworks
API Integration: Proven ability to integrate multiple APIs and services to create advanced AI capabilities
Production Deployment: Experience deploying and managing AI models in cloud environments (AWS, GCP, Azure)

Job Responsibility

Design and Deploy Production LLM Systems: Build scalable, reliable AI systems that serve millions of users with high availability and performance requirements
Agent Development: Create sophisticated AI agents that can chain multiple LLM calls, integrate with external APIs, and maintain state across complex workflows
Prompt Engineering Excellence: Develop and optimize prompting strategies, understand trade-offs between prompt engineering vs fine-tuning, and implement advanced prompting techniques
System Integration: Build robust APIs and integrate AI capabilities with existing Apollo infrastructure and external services
Evaluation & Quality Assurance: Implement comprehensive evaluation frameworks, A/B testing, and monitoring systems to ensure AI systems meet accuracy, safety, and reliability standards
Performance Optimization: Optimize for cost, latency, and scalability across different LLM providers and deployment scenarios
Cross-functional Collaboration: Work closely with product teams, backend engineers, and stakeholders to translate business requirements into technical AI solutions

What we offer

equity
company bonus or sales commissions/bonuses
401(k) plan
at least 10 paid holidays per year, flex PTO, and parental leave
employee assistance program and wellbeing benefits
global travel coverage
life/AD&D/STD/LTD insurance
FSA/HSA and medical, dental, and vision benefits

Fulltime

Senior LLM Backend Engineer

We are looking for a Senior Backend Engineer with a strong focus on Large Langua...

Location

Spain

Salary:

Not provided

Bark

Expiration Date

Until further notice

Requirements

Extensive production experience with Python in backend engineering
Proven experience integrating LLMs into applications via APIs or SDKs
Strong experience building and maintaining APIs for LLM-based features
Strong experience building and maintaining event-driven workflows
Strong experience building and maintaining business logic that consumes AI outputs
Strong experience building and maintaining integrations with 3rd party AI/ML platforms
Solid SQL and NoSQL experience (especially in AI data pipelines)
Production experience with Docker, ideally with Kubernetes or AWS Fargate/ECS/EKS
Experience deploying and maintaining AI services in cloud environments
Strong organisational skills and ability to deliver in a fast-paced, product-focused environment

Job Responsibility

Work with product managers to understand user needs and translate them into AI-powered functionality
Design and build APIs, services, and workflows that integrate LLMs (both proprietary and open-source)
Implement prompt engineering, RAG pipelines, and model fine-tuning where required
Optimise AI inference performance, scalability, and cost-effectiveness
Ensure AI features meet high standards for security, reliability, and maintainability
Collaborate with other engineers to integrate AI features seamlessly into the wider system
Stay on top of emerging LLM technologies and best practices, running experiments and sharing knowledge across the team

What we offer

Fully remote working
Personal annual L&D Budgets with 600€ to spend on your development
Being at the forefront of an industry with new and exciting problems to solve

Fulltime

AI Backend Engineer

Randstad

Location:
Japan , Tokyo

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:
May 03, 2025

Expiration:
November 11, 2026

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