Search Backend Infra Engineer Job at Perplexity (Belgrade)

Senior Machine Learning Engineering Manager, Gen AI

We're seeking a Senior Machine Learning Manager (M60) to lead a cross-functional...

Location

United States

Salary:

193500.00 - 303150.00 USD / Year

Atlassian

Expiration Date

Until further notice

Requirements

8+ years in ML, search, or backend engineering roles, with 3+ years leading teams
Strong track record of shipping ML-powered or LLM-integrated user-facing products
Experience with RAG systems (vector search, hybrid retrieval, LLM orchestration)
Deep experience in either modeling (e.g., LLMs, search, NLP) or engineering (e.g., backend infra, full-stack), with the ability to lead end-to-end
Deep understanding of LLM ecosystems (OpenAI, Claude, Mistral, OSS), orchestration frameworks (LangChain, LlamaIndex), and vector databases (Weaviate, Pinecone, FAISS, etc.)
Strong product intuition and ability to translate complex tech into valuable user features
Familiarity with GenAI evaluation methods: hallucination detection, groundedness scoring, and human-in-the-loop feedback loops
Master’s or PhD in Computer Science, Machine Learning, or related field preferred—or equivalent practical experience

Job Responsibility

Lead the vision, design, and execution of LLM-powered AI products, leveraging advance AI modeling (e.g. SLM post-training/fine-tuning), RAG architectures and hybrid ranking system
Define system architecture across retrievers, rankers, orchestration layers, prompt templates, and feedback mechanisms
Work closely with product and design teams to ensure delightful, fast, and grounded user experiences
Build and manage a cross-disciplinary team including ML engineers, backend/frontend engineers, and applied scientists
Foster a culture of E2E ownership — empowering the team to move from prototype to production quickly and iteratively
Mentor individuals to grow in both technical depth and product acumen
Shape the technical roadmap and long-term strategy for GenAI search across Atlassian’s product suite
Partner with platform and infra teams to scale inference, evaluate performance, and integrate usage signals for continuous improvement
Champion data quality, grounding, and responsible AI practices in all deployed features

What we offer

health and wellbeing resources
paid volunteer days

Fulltime

Search Golang Engineer

Join Perplexity AI as a Search Golang Engineer and help architect the next gener...

Location

Belgrade, London, Berlin

Salary:

Not provided

Perplexity

Expiration Date

Until further notice

Requirements

Significant experience developing scalable Golang services for production environments
Deep understanding of distributed systems, microservices, and cloud infrastructure (AWS preferred)
Proven track record implementing systems that scale to millions of users
Strong background in Linux performance tuning, monitoring, and debugging
Experience with CI/CD pipelines, containerization, and automation
Ability to proactively tackle scaling challenges—anticipating bottlenecks before they arise
Passion for building backend solutions that power real-time, reliable search

Job Responsibility

Build highly scalable, distributed backend services using Golang
Design, develop, and maintain search infrastructure that supports exponential traffic growth
Engineer cloud-native solutions, optimizing for horizontal scale and rapid failover
Implement robust monitoring, autoscaling, and incident recovery strategies
Collaborate with product, infra, and devops teams to maximize throughput and resilience
Drive improvements in CI/CD, automation, and operational excellence for backend systems
Mentor peers and champion scalable design principles across the organization

Fulltime

Senior AI Platform Engineer - Data and Knowledge

We’re hiring a Senior AI Platform Engineer (Knowledge & Data) to build and own t...

Location

Salary:

Not provided

MaintainX

Expiration Date

Until further notice

Requirements

5+ years of experience in Python backend engineering and systems design experience
Experience shipping AI-powered or LLM-integrated backend systems
Experience with vector DBs (Qdrant/Pinecone/Chroma/etc.)
Understanding of embeddings, chunking, and retrieval strategies
Experience building search or retrieval systems over unstructured data
Comfort working across multiple layers (services, data, infra, AI tooling)

Job Responsibility

Build scalable backend services and internal APIs for the AI platform
Integrate LLMs and retrieval into reliable, production-ready workflows
Build knowledge ingestion pipelines for LLMs (documents, APIs, semi-structured data)
Design chunking and embedding approaches together with vector DB data models and indexing strategies
Implement retrieval pipelines (semantic, keyword, hybrid) and caching
Contribute to shared infrastructure: CI/CD, observability, deployments

What we offer

Competitive salary and meaningful equity opportunities
Healthcare, dental, and vision coverage
401(k) / RRSP enrollment program
Take what you need PTO

Staff Software Engineer

The Discovery team sits at the core of Harmonic’s product and data engine. We ma...

Location

United States , New York

Salary:

210000.00 - 280000.00 USD / Year

Harmonic

Expiration Date

Until further notice

Requirements

7-8+ YoE building distributed systems or large scale backend architecture
Designed and scaled search, recommendation, or ranking systems that balance precision, recall, and performance
Led or heavily contributed to ML or LLM integrations in production
A track record of technical leadership mentoring others, introducing frameworks, and influencing technical direction
Strong experience with data-intensive systems, asynchronous processing, or event-driven architectures

Job Responsibility

Architect the core intelligence behind Scout
Own the end to end architecture of our sourcing engine from data ingestion, ranking, personalization, and model orchestration
Define scalable frameworks for retrieval, reranking, and LLM driven evaluation to ensure we deliver highly personalized and high quality results
Create architectural patterns that integrate Scout seamlessly with our existing products to power repeatable sourcing workflows
Lead agentic experimentation and evaluation
Drive technical discovery for emerging technologies (e.g. memory systems, schema, prompt libraries, embedding models, and agentic frameworks)
Improve and extend our evaluation pipelines to test new models and determine lifts in specific parts of our product
Build systems that allow fast iteration without compromising quality or reliability
Shape AI native product experiences
Partner with product and design to define patterns that make LLM powered sourcing intuitive and fast

What we offer

Top of the line health, dental and vision insurance, with 100% premium covered
401k matching
Free lunch in office
Monthly team dinner for each office
Commuter benefits

Higher Level Teaching Assistant

Become a Super-TA at this SEN School! Make a Difference in the Lives of Young Pe...

Location

United Kingdom , Guildford, Surrey

Salary:

27713.00 - 30250.00 GBP / Year

Randstad

Expiration Date

April 09, 2026

Requirements

Experience working with students with autism and associated complex needs
Strong commitment to student well-being
Ability to build positive relationships with students and colleagues
Ability to manage a variety of situations and adapt approach to meet individual needs

Job Responsibility

Lead lessons and activities across the school
Help students with their learning, modify and adapt activities
Contribute to individual learning plans
Maintain a positive and supportive learning environment
Address challenging behavior
Work alongside educators and specialists

What we offer

£2000 Welcome Bonus for HLTA's with SEN experience
Life assurance
Generous pension scheme
Employee Assistance Program
Ongoing training and development opportunities
Term-time only work
No evenings or weekends
Flexible schedule
Fully funded training

!

Field Application Engineer

Location

China , Beijing

Salary:

Not provided

ASML

Expiration Date

Until further notice

Requirements

Master’s degree in Physics, Optical Science/Engineering, Chemical Engineering, Chemistry, Electrical Engineering, Materials Science, or Mathematics
Solid understanding of semiconductor process knowledge
Strong presentation and communication skills, capable of effectively interacting with internal stakeholders (BDM, project leaders, management) and external customers
Flexible mindset to support various tasks in a matrix organization (issue escalation, NPI, NTP projects, etc.)
Ability to work under pressure and travel flexibly to support customers across China
Excellent bilingual communication skills in both Chinese and English

Job Responsibility

Provide on-site technical support for lithography processes, including process development, optimization, parameter setup, and issue diagnosis
Deeply understand customer products and process requirements to deliver customized lithography solutions
Analyze and resolve lithography-related process issues such as exposure uniformity, alignment accuracy, CD control, and overlay errors
Support customers in lithography process verification and tuning during new product introduction (NPI)
Prepare and maintain technical documentation, including process flows, issue analysis reports, and technical communication materials
Collaborate with headquarters R&D, product, and FAE teams to drive continuous process improvement and innovation
Stay updated on the latest industry trends in lithography technology and participate in internal technical training and knowledge sharing

Fulltime

Manager, Product Management - Bank Core Mod

Product Management at Capital One is a booming, vibrant craft that requires reim...

Location

United States , McLean; Richmond; Cambridge

Salary:

149800.00 - 188100.00 USD / Year

Capital One

Expiration Date

Until further notice

Requirements

At least 3 years of experience working in Product Management
Currently has, or is in the process of obtaining one of the following with an expectation that the required degree will be obtained on or before the scheduled start date: A Bachelor's Degree in a quantitative field (Statistics, Economics, Operations Research, Analytics, Mathematics, Computer Science, Computer Engineering, Software Engineering, Mechanical Engineering, Information Systems or a related quantitative field)
A Master's Degree in a quantitative field (Statistics, Economics, Operations Research, Analytics, Mathematics, Computer Science, Computer Engineering, Software Engineering, Mechanical Engineering, Information Systems or a related quantitative field) or an MBA with a quantitative concentration

Job Responsibility

Demonstrate proficiency in five key areas: Human Centered- Obsesses about internal and external customer needs to reimagine and innovate product solutions
Business Focused - Delivers game-changing outcomes by focusing on leverage and execution excellence
Technology Driven - Leverages technology to deliver innovative and resilient solutions that enable both near term and long term value
Integrated Problem Solving- Identifies and resolves complex problems to deliver outcomes while mitigating product risks
Transformational Leadership - Leads cross functional teams to solve customer problems and drive organizational alignment

What we offer

Performance based incentive compensation, which may include cash bonus(es) and/or long term incentives (LTI)
A comprehensive, competitive, and inclusive set of health, financial and other benefits that support your total well-being

Fulltime

Account Expert, Business

As a Business Account Expert, Virtual Business, at T-Mobile for Business, you'll...

Location

United States , Maitland

Salary:

56900.00 - 102600.00 USD / Year

T-Mobile

Expiration Date

Until further notice

Requirements

High School Diploma/GED
2 years inside, outside, retail, or similar sales position (Preferred)
1-2 years experience in customer service, sales and/or retention (Preferred)
Excellent communication and interpersonal skills
Strong organizational skills and attention to detail
Self-motivated with a results-driven mindset
Ability to work independently and as part of a team
Proficiency with Microsoft Office Suite
At least 18 years of age
Legally authorized to work in the United States

Job Responsibility

Engage in daily customer communication and follow-up using various tools
Follow up on leads from marketing campaigns, call lists, and referrals
Understand customer needs, key contacts, and potential business opportunities
Manage the full sales cycle—from prospecting and qualifying to presenting, negotiating, and closing deals
Maintain an active pipeline of qualified opportunities using the CRM system
Accurately document all interactions, quotes, and deal progress
Attend all required product and service training

What we offer

Medical, dental and vision insurance
Flexible spending account
401(k)
Employee stock grants
Employee stock purchase plan
Paid time off
Up to 12 paid holidays
Paid parental and family leave
Family building benefits
Back-up care

Fulltime

Search Backend Infra Engineer

Perplexity

Location:
Serbia , Belgrade

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
February 21, 2026

Looking for more opportunities? Search for other job offers that match your skills and interests.

Similar Jobs for Search Backend Infra Engineer