Java Platform Engineer Jobs

New

Senior Software Engineer, Wikidata Platform

The Wikimedia Foundation is seeking a Senior Software Engineer to join the team ...

Location

Salary:

141352.00 - 175725.00 USD / Year

Wikimedia Foundation

Expiration Date

Until further notice

Requirements

5+ years of experience as a backend or platform engineer working on distributed systems or data platforms
Deep understanding of database and knowledge graph representation technologies and standards
Proficiency in Java, C++, or other systems languages. Ability to set up, scale, and investigate systems is more important than expertise in a particular language.
Experience building and operating production-grade services with SLOs
Familiarity with modern observability tools (metrics, logging, tracing)
Understanding of graph databases, search indexes, or data processing pipelines
Ability to work collaboratively across disciplines and communicate clearly across technical and non-technical audiences
A commitment to learning, resilience, and contributing to a mission-driven engineering culture

Job Responsibility

Design, build, and maintain backend systems and APIs that power Wikidata’s query infrastructure
Improve reliability, observability, and automation of the Wikidata Query Service and data pipelines
Collaborate with SRE, data engineers, and product teams to ensure stability and scalability under growing usage
Monitor production systems, respond to operational incidents, and proactively identify and resolve bottlenecks
Support platform migrations and system upgrades (e.g., triple stores, streaming ingestion)
Contribute to deployment automation, CI/CD workflows, and service instrumentation
Participate in code reviews, design discussions, and technical planning
Document systems and share knowledge with team members and Wikimedia’s broader technical community

Fulltime

New

Platform Engineer, Agent Collaboration Platform

Platform engineering at Hebbia is about excellent, scalable enablement. You are ...

Location

United States , New York City; San Francisco

Salary:

160000.00 - 300000.00 USD / Year

Hebbia

Expiration Date

Until further notice

Requirements

Bachelor's or Master's degree in Computer Science, Data Science, Statistics, or a related field
5+ years software development experience at a venture-backed startup or top technology firm, with a focus on distributed systems and platform engineering
Proficiency in building backend and distributed systems using technologies such as Python, Java, or Go
Deep understanding of scalable system design, performance optimization, and resilience engineering
Extensive experience with cloud platforms (e.g., AWS)
Working experience with one or more of the following: Kafka, ElasticSearch, PostgreSQL, and/or Redis
Knowledge of workflow orchestration and execution platforms like Airflow, Temporal or Prefect
Proven experience enabling observability patterns
Ability to analyze complex problems, propose innovative solutions, and effectively communicate technical concepts
Proven experience in leading software development projects and collaborating with cross-functional teams

Job Responsibility

Own critical system components: Take complex requirements and turn them into robust, scaled solutions that solve real customer needs
Unlock O(1) universal indexing: Build and iterate on our high-scale document build system that enables constant time latency for indexing any content in the world, regardless of data volume
Drive performance optimization: Architect and implement performance-tuning solutions to ensure our systems operate efficiently at scale, minimizing latency and maximizing throughput across millions of documents
Mentor and guide: Provide technical leadership, mentorship, and guidance to junior engineers, fostering a culture of learning and growth

What we offer

PTO: Unlimited
Insurance: Medical + Dental + Vision + 401K
Eats: Catered lunch daily + doordash dinner credit if you ever need to stay late
Parental leave policy: 3 months non-birthing parent, 4 months for birthing parent
Fertility benefits: $15k lifetime benefit
New hire equity grant: competitive equity package with unmatched upside potential

Fulltime

New

Platform Engineer, Agents

Platform engineering at Hebbia is about excellent, scalable enablement. You are ...

Location

United States , New York City; San Francisco

Salary:

160000.00 - 300000.00 USD / Year

Hebbia

Expiration Date

Until further notice

Requirements

Bachelor's or Master's degree in Computer Science, Data Science, Statistics, or a related field. A strong academic background with coursework in data structures, algorithms, and software development is preferred
5+ years software development experience at a venture-backed startup or top technology firm, with a focus on distributed systems and platform engineering
Proficiency in building backend and distributed systems using technologies such as Python, Java, or Go
Deep understanding of scalable system design, performance optimization, and resilience engineering
Extensive experience with cloud platforms (e.g., AWS)
Working experience with one or more of the following: Kafka, ElasticSearch, PostgreSQL, and/or Redis
Knowledge of workflow orchestration and execution platforms like Airflow, Temporal or Prefect
Proven experience enabling observability patterns
Ability to analyze complex problems, propose innovative solutions, and effectively communicate technical concepts to both technical and non-technical stakeholders
Proven experience in leading software development projects and collaborating with cross-functional teams. Strong interpersonal and communication skills to foster a collaborative and inclusive work environment

Job Responsibility

Own critical system components: Take complex requirements and turn them into robust, scaled solutions that solve real customer needs
Unlock O(1) universal indexing: Build and iterate on our high-scale document build system that enables constant time latency for indexing any content in the world, regardless of data volume
Drive performance optimization: Architect and implement performance-tuning solutions to ensure our systems operate efficiently at scale, minimizing latency and maximizing throughput across millions of documents
Mentor and guide: Provide technical leadership, mentorship, and guidance to junior engineers, fostering a culture of learning and growth

What we offer

PTO: Unlimited
Insurance: Medical + Dental + Vision + 401K
Eats: Catered lunch daily + doordash dinner credit if you ever need to stay late
Parental leave policy: 3 months non-birthing parent, 4 months for birthing parent
Fertility benefits: $15k lifetime benefit
New hire equity grant: competitive equity package with unmatched upside potential

Fulltime

Principal Java Engineer

The Principal Java Engineer is a senior individual contributor responsible for a...

Location

United States , Jersey City

Salary:

176720.00 - 265080.00 USD / Year

Citi

Expiration Date

December 21, 2025

Requirements

10+ years of experience in system development
Proficient in Java programming language
Expertise in modern technology stacks, frameworks, and tools (e.g., cloud platforms, microservices, containerization)
Advanced knowledge of system design, coding best practices, testing methodologies, debugging techniques, and implementation strategies
Proven ability to write clean, maintainable, and efficient code adhering to software engineering best practices
Demonstrated success leading large-scale technology initiatives and delivering impactful results
Strong problem-solving and strategic technical decision-making skills
Excellent leadership, communication, and stakeholder management skills
Bachelor's degree/University degree or equivalent experience

Job Responsibility

Analyze a variety of complex technical issues and provide insightful solutions
Research, design, and develop systems based on strong computer science fundamentals and application development principles
Integrate deep application development knowledge with broader technology functions to achieve strategic goals
Provide technical expertise and advanced knowledge of applications programming, ensuring adherence to architectural blueprints
Implement complex solutions hands-on
Mentor and guide team members across various technology disciplines
Cultivate a collaborative and supportive environment for subject matter experts
Collaborate with senior leaders across functions and external parties as needed

What we offer

medical, dental & vision coverage
401(k)
life, accident, and disability insurance
wellness programs
paid time off packages including vacation, sick leave, and paid holidays
discretionary and formulaic incentive and retention awards

Fulltime

New

Databricks Platform Engineer

Are you excited about building a world-class data platform and working with clou...

Location

Finland , Helsinki

Salary:

Not provided

Supercell

Expiration Date

Until further notice

Requirements

5+ years of experience in designing, developing and maintaining large-scale data platform in a complex enterprise environment
In-depth experience with Databricks infrastructure and services
Extensive Infrastructure as Code experience (preferably Terraform)
Software development experience (preferably Java or Python)
Strong collaboration and communication skills
Ability to innovate and work independently

Job Responsibility

Own and improve the Databricks infrastructure for data collection, storage and processing
Implement and manage flexible access controls that don’t compromise user speed and efficiency
Proactively suggest and implement improvements that increase scalability, robustness and availability of data systems
Stay up to date with new products and services released by Databricks, experiment and help make them part of Supercell’s data platform
Participate in 24/7 on-call to maintain batch and real-time data infrastructure
Contribute to common data tooling to enhance engineering productivity
Together with the rest of the team, develop vision and strategy for the data platform

What we offer

Relocation support for you and your family (including pets)
Compensation and benefits structured to help you enjoy your time
Work environment and resources to succeed while having fun

Fulltime

New

Java Engineer

Java Engineer – London. Are you a seasoned technologist with a passion for solvi...

Location

United Kingdom , City Of London

Salary:

120000.00 - 150000.00 GBP / Year

Xcede

Expiration Date

January 23, 2026

Requirements

10 years relevant industry experience
exposure to front/middle office trade systems
Strong hands-on expertise in Java (server-side), MySQL, AWS (cloud services), Bash/Shell scripting exposure
Strong organisational, communication, and problem-solving skills
A natural tech enthusiast with a hunger to learn and innovate

Job Responsibility

Providing day-to-day support for a standalone multi-asset trading platform,including operational troubleshooting and bug fixing
Delivering ongoing development and feature enhancements, includingreviewing and modernising core platform code
Ensuring systematic testing and high-quality release management
Building MIS reporting tools and supporting automation
Working directly with the business trading team to shape technical solutions
Supporting STP/automation integrations with third-party systems
Interpreting regulatory reporting requirements and implementing supportingfunctionality
Working with front-end development tools, cybersecurity considerations, andwider infrastructure

What we offer

plus lucrative bonus and company share scheme, total comp circa £160k - £200k

Fulltime

New

Platform Engineer, Document Intelligence

Platform engineering at Hebbia is about excellent, scalable enablement. You are ...

Location

United States , New York City; San Francisco

Salary:

160000.00 - 300000.00 USD / Year

Hebbia

Expiration Date

Until further notice

Requirements

Bachelor's or Master's degree in Computer Science, Data Science, Statistics, or a related field. A strong academic background with coursework in data structures, algorithms, and software development is preferred
5+ years software development experience at a venture-backed startup or top technology firm, with a focus on distributed systems and platform engineering
Proficiency in building backend and distributed systems using technologies such as Python, Java, or Go
Deep understanding of scalable system design, performance optimization, and resilience engineering
Extensive experience with cloud platforms (e.g., AWS)
Working experience with one or more of the following: Kafka, ElasticSearch, PostgreSQL, and/or Redis
Knowledge of workflow orchestration and execution platforms like Airflow, Temporal or Prefect
Proven experience enabling observability patterns
Ability to analyze complex problems, propose innovative solutions, and effectively communicate technical concepts to both technical and non-technical stakeholders
Proven experience in leading software development projects and collaborating with cross-functional teams. Strong interpersonal and communication skills to foster a collaborative and inclusive work environment

Job Responsibility

Own critical system components: Take complex requirements and turn them into robust, scaled solutions that solve real customer needs
Unlock O(1) universal indexing: Build and iterate on our high-scale document build system that enables constant time latency for indexing any content in the world, regardless of data volume
Drive performance optimization: Architect and implement performance-tuning solutions to ensure our systems operate efficiently at scale, minimizing latency and maximizing throughput across millions of documents
Mentor and guide: Provide technical leadership, mentorship, and guidance to junior engineers, fostering a culture of learning and growth

What we offer

PTO: Unlimited
Insurance: Medical + Dental + Vision + 401K
Eats: Catered lunch daily + doordash dinner credit if you ever need to stay late
Parental leave policy: 3 months non-birthing parent, 4 months for birthing parent
Fertility benefits: $15k lifetime benefit
New hire equity grant: competitive equity package with unmatched upside potential

Fulltime

New

Software Engineer - Platform

We build simple yet innovative consumer products and developer APIs that shape h...

Location

United States , New York

Salary:

163200.00 - 223200.00 USD / Year

Plaid

Expiration Date

Until further notice

Requirements

2 to 4 years of software engineering experience, with a proven track record of building and shipping complex backend systems or platforms
Experience designing and scaling distributed systems is highly desired
Proficiency in at least one general-purpose programming language (e.g. Go, Python, Java, C++)
Experience with Go is a plus
Deep understanding of system design and algorithms
Hands-on experience with designing, building, and operating distributed systems or microservices architectures at scale
Familiarity with relational and NoSQL database technologies (for example, MySQL/TiDB, PostgreSQL, MongoDB) and data storage architectures
Experience building data pipelines or working with big data processing frameworks (Spark, Databricks, etc.) is a plus
Excellent communication and teamwork skills

Job Responsibility

Design & Develop Scalable Systems: Build and maintain core platform services with a focus on performance, reliability, and scalability
Infrastructure & Data Platforms: Develop and improve infrastructure for data storage and processing
Developer Productivity Tools: Create internal tools, frameworks, and automation to improve developer productivity and efficiency
Security & Privacy by Design: Integrate security, privacy, and compliance best practices into our platforms
Cross-Team Collaboration: Work hand-in-hand with product engineers and other stakeholders to understand requirements and translate them into reliable platform capabilities
Technical Excellence & Leadership: Uphold high engineering standards through code reviews, testing, and documentation

What we offer

medical, dental, vision, and 401(k)

Fulltime

Java Platform Engineer

Xcede

Location:
United Kingdom, London

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
December 13, 2025

Expiration:
January 23, 2026

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Senior Software Engineer, Wikidata Platform