Senior Backend Engineer

Senior search engineer

Location

Japan , Tokyo

Salary:

8000000.00 - 12000000.00 JPY / Year

Randstad

Expiration Date

March 24, 2026

Requirements

5+ years of experience as a search engineer or in a directly related role
Must have expertise in search technologies like Elasticsearch, Solr, or Lucene
Proficiency in Python and/or Java for backend systems development is essential
Must have experience with machine learning models and natural language processing
Proven ability to optimize query parsing, indexing, and relevance tuning for search systems
Experience working with AI and ML models, preferably with tools like TensorFlow or PyTorch
English proficiency is required
Japanese language is a plus

Job Responsibility

Remote work

What we offer

Health insurance
Pension insurance
Employment insurance
Performance-based bonus
Saturdays off
Sundays off
Public holidays off

Fulltime

Senior Software Engineer, Backend

As a Senior full-stack engineer, with a backend focus, you will be at the forefr...

Location

Germany , Berlin

Salary:

Not provided

Cresta

Expiration Date

Until further notice

Requirements

Proven experience as a Backend Engineer with a focus on database design and system architecture
Strong expertise in ClickHouse or similar columnar databases for managing large-scale, real-time analytical queries
Hands-on experience with Elasticsearch for indexing and searching large datasets
Proficient in backend programming languages such as Python, Go
Experience with RESTful API design and development
Solid understanding of distributed systems, microservices architecture, and cloud infrastructure
Experience with performance tuning, data modeling, and query optimization
Strong problem-solving skills and attention to detail
Excellent communication and teamwork abilities

Job Responsibility

Design, implement, and maintain backend services and APIs to support applications
Build and optimize data storage solutions using Postgres, ClickHouse and Elasticsearch to ensure high performance and scalability
Collaborate with cross-functional teams, including frontend engineers, data scientists, and machine learning engineers, to deliver end-to-end solutions
Monitor and troubleshoot performance issues in distributed systems and databases
Write clean, maintainable, and efficient code following best practices for backend development
Participate in code reviews, testing, and continuous integration efforts
Ensure security, scalability, and reliability of backend services
Analyze and improve system architecture, focusing on performance bottlenecks, scaling, and security

What we offer

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: 28 days in Germany

Fulltime

We’re looking for a Senior Backend Engineer to help bring this vision to life. Y...

Location

Finland , Helsinki

Salary:

Not provided

Aiven Deutschland GmbH

Expiration Date

Until further notice

Requirements

Solid experience building backend services for managed services/SaaS
Hands-on coding experience with: Python for backend services, ingestion, and orchestration
REST APIs as a primary interface
JVM (Java / Kotlin) for fixes and improvements in the open-source projects
Knowledge of data storage and indexing systems: relational DBs (PostgreSQL/MySQL), search engines (OpenSearch/Elasticsearch), and event logs (Kafka)
Familiarity with Kubernetes, Terraform/IaC, and cloud networking basics
A security-conscious mindset: you think about threat modeling, access controls, and auditability
Pragmatic problem-solving: you enjoy building clean systems that are easy to operate and evolve

Job Responsibility

Design and implement managed open source services that power the metadata discovery and governance system
Build and extend the Metadata Orchestrator, listening to control-plane events and orchestrating ingestion jobs without messy cron scheduling
Develop ingestion connectors & pipeline and backend logic for indexing and serving metadata
Shape APIs (REST/HTTP) that connect the backend with UI and integrations
Work with identity & policy mapping so Aiven Teams, Projects, and SSO map cleanly into managed service access controls (RBAC/ABAC)
Focus on operability: deployment patterns, monitoring, observability (metrics/logs/traces), and incident response
Collaborate closely with engineers, designers, product, and platform/security teams to deliver end-to-end functionality

What we offer

Participate in Aiven’s equity plan
With Aiven locations spanning the globe, we want all of our crabs to find the right balance with our hybrid work policy
Get the equipment you need to set yourself up for success
Step up your career game with real employer support (use one of our learning platforms, annual learning budget, and more)
Get holistic wellbeing support through our global Employee Assistance Program
Your wellbeing matters: we provide extensive Occupational Health Care, Dental Care, as well as sports, culture, massage and lunch benefits
Love breakfast? So do we! Join us at our regular office breakfast
We also have you covered by statutory accident insurance

Fulltime