Senior Software Engineer

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

Federal Senior Software Engineer

As Virtru continues to grow rapidly worldwide, including in the U.S. public sect...

Location

United States , Washington DC

Salary:

190000.00 - 225000.00 USD / Year

Virtru

Expiration Date

Until further notice

Requirements

Active U.S. TS/SCI Clearance required - ideally with CI poly or willingness to sit for one
5+ years Experience with Go or Java and backend development
Experience developing software in or supporting Federal Government customer environments, with a focus on DoD mission areas
Experience integrating software solutions with other business systems, for example: data warehousing, BI, CRM, ERP, or analytics platforms
Ability to decompose complicated technical concepts into manageable parts and effectively communicate those parts in a manner that is digestible for peers as well as management
Self-starter and system-level thinker who proactively scans for and communicates problems with technology, investigates potential causes, and proposes solutions/next steps
Strong communication skills
Project management skills, including experience working on matrixed teams
Expert in building relationships, listening and managing time
A passion to serve the customer, which has played out in a prior customer-facing role like consulting or support, ideally sales engineering

Job Responsibility

Deliver efficient and professional solutions for clients to maximize value from Virtru’s products in Go or Java
Maintain awareness and knowledge of Virtru products, specifically APIs and SDKs
Able to develop standalone, modular, and code libraries to enable clients adoption of Virtru products
Engage with multiple business units including software engineering, operations, product management, and business stakeholders
Maintain a broad and deep technical understanding of the Virtru product line and the underlying technologies and protocols
Understand Virtru’s engineering strategy and business goals, and use this context to inform your work with VGS customers
Stay up-to-date on industry trends through self-study, research, and online courses

What we offer

A Flexible PTO policy — we strongly encourage you to take time off (in addition to 14 holidays)
A $1,500 annual Learning & Development Stipend
Frequent company-sponsored team celebrations
Access to an Employee Assistance Program
Access to Headspace, a mental health app tailored to your specific needs
A flat 3% contribution to your retirement account
A high degree of flexibility
Competitive compensation
Generous parental, medical, and bereavement policies
Uncapped commissions for Sales roles

Fulltime

Senior Software Engineer, Experience Platform Team

The Experience Platform team is looking for a full-stack/backend software engine...

Location

United States , New York City

Salary:

Not provided

Pinecone

Expiration Date

Until further notice

Requirements

At least 5 years of experience in full-stack or backend development (NodeJS, Rust, Python, or Go)
Experience with queueing and streaming technologies like Kafka, Kinesis, or Pub/Sub
Familiarity with creating web interfaces with React or other frontend frameworks
Expertise in event-driven system design and distributed systems principles
Proficiency in building reliable data processing pipelines for usage tracking and reconciliation
Familiarity with integrating third-party APIs and handling inconsistent data
Hands-on experience with one or more major cloud providers (AWS, GCP, Azure), especially services related to data streaming, serverless compute, and data storage
Strong understanding of RESTful API design

Job Responsibility

Design event-driven architectures and distributed systems for reliable real-time and batch event processing
Develop queueing and streaming systems (e.g., Kafka, Kinesis) with robust event handling mechanisms
Build pipelines for ingesting, transforming, and aggregating usage data, ensuring accuracy and reliability
Integrate with external APIs and vendor systems, designing for resiliency against outages or inconsistent data
Create auditable and observable systems with monitoring, alerting, and verification mechanisms
Implement end-to-end user experiences across multiple services and web applications

What we offer

Comprehensive health coverage including medical, dental, vision, and mental health resources
401(k) Plan
Equity award
Flexible time off
Paid parental leave
Annual Company Retreat
WFH Equipment Stipend

Made Tech is on a mission to use technology to improve society - for everyone. W...

Location

United Kingdom , Bristol; London; Manchester; Swansea

Salary:

50000.00 - 70000.00 GBP / Year

Made Tech

Expiration Date

Until further notice

Requirements

Written code with tests
Delivery in an agile environment
Worked across a variety of programming languages
Worked with at least one Cloud platform
Worked with databases
Worked with APIs
Debugging experience in a range of systems
Evidence of self-development
Drive to deliver outcomes for users
Desire to mentor others

Job Responsibility

Write and deliver custom software for the public sector
Work on a variety of different problems from monoliths to microservices
Upskill colleagues and customers
Learn from others
Combine cloud automation knowledge with DevOps culture
Document architecture and infrastructure as code
Empower teams with the mantra: you build it, you run it
Embrace sharing knowledge and skills with others
Coach and help teams use the platforms you build

What we offer

30 days Holiday
Flexible Working Hours
Flexible Parental Leave
Remote Working
Paid counselling
Flexible benefit platform including a Smart Tech scheme, Cycle to work scheme, and an individual benefits allowance which you can invest in a Health care cash plan or Pension plan
Optional social and wellbeing calendar of events

Fulltime

Senior Software Engineer

LufCo is hiring a Senior Software Engineer to join a small team environment supp...

Location

United States , Havre de Grace

Salary:

140000.00 - 225000.00 USD / Year

LufCo

Expiration Date

Until further notice

Requirements

Bachelors Degree in a technical field requiring advanced math, preferably Computer Science, Computer Engineering, or Electrical Engineering
7+ years of experience as a Software Engineer working on complex programs, preferably within the SIGINT space
Coding Is Life mentality - you should have personal projects showing your interest in coding outside of work available to share with our team
Proficient or Mastery in some or all the following development technologies: C/C++/Java/Python/Shell Scripting
Google Protocol Buffers
HTTP Rest APIs
Docker
RPMs or equivalent
CUDA parallel computing platform and programming modeling
Full Stack development

Job Responsibility

Debug existing software and correct defects
Provide recommendations for improving documentation and software development process standards
Design and code new software or modify existing software to add new features
Develop simple data queries for existing or proposed databases or data repositories
Write or review software, system, and other technical documentation
Serve as team lead at the level appropriate to the software development process being used on any particular project
Design or implement complex database or data repository interfaces/queries
Assist with developing and executing test procedures for software components
Develop software solutions by analyzing system performance standards, confer with users or system engineers
analyze systems flow, data usage and work processes

What we offer

Competitive salary
generous PTO
health/dental/vision insurance
401K matching
tuition reimbursement
Paid Time Off
401K Contribution and Employer Match Contributions
Medical, Dental, and Vision Coverage
Blue Award level referral bonus

Fulltime

Senior / Staff Software Engineer (API)

At Linear, we are on a mission to bring magic back to software. To empower produ...

Location

United States

Salary:

Not provided

Linear

Expiration Date

Until further notice

Requirements

Experienced engineers who can dive deep into design and performance problems
Architect robust backend services
Build foundational APIs that scale
Strong systems thinking mindset
Solid backend engineering experience

Job Responsibility

Take ownership, build, and evolve the APIs that power all of Linear, from frontend features to public developer access
Collaborate with product engineers, design, and infrastructure to deliver performant, reliable, and secure data flows
Improve our developer platform with well-documented, discoverable, and stable APIs
Shape the API surface that AI agents will use to interact with Linear, enabling autonomous workflows and real-time decision-making

What we offer

Interesting and challenging work
Work-life balance
Competitive salary and equity
Employee-friendly equity terms (early exercise, extended exercise)
Paid lunch and coffee during workdays
Work remotely, no commuting to the office
Paid co-working space/desk at an office
Health, dental, and vision insurance (US)
Regular team events and off-sites
5 weeks of paid vacation

Fulltime

Senior Software Engineer, Backend

Kiddom is a groundbreaking educational platform that promotes student equity and...

Location

United States , San Francisco

Salary:

160000.00 - 220000.00 USD / Year

Kiddom

Expiration Date

Until further notice

Requirements

BS or MS in Computer Science or a related field
6+ years professional software engineering experience
Experience scaling integration systems
Proficiency in working with databases (SQL & NoSQL) such as PostgreSQL, MySQL, MongoDB, or Redis
Experience with cloud platforms like AWS, GCP, or Azure, and containerization tools like Docker and Kubernetes
Experience with microservices architecture and distributed systems
Strong knowledge of design patterns and software engineering best practices
You've been through the planning, launching and refactoring phases of code you wrote
Excellent problem solving and debugging skills
Ability to work as part of a collaborative team in a fast-paced environment

Job Responsibility

Design, develop, and maintain backend services, APIs, and databases
Ensure the scalability, security, and performance of backend systems
Collaborate with frontend engineers, product managers, and other stakeholders to deliver high-quality features
Optimize applications for performance, reliability, and scalability
Conduct code reviews and provide mentorship to junior engineers
Troubleshoot and resolve production issues, ensuring system uptime and reliability
Work with our customers to troubleshoot issues and bugs and also help with Kiddom onboarding

What we offer

The opportunity to make a measurable impact in K-12 education
Competitive salary and equity in a hyper-growth, mission-driven organization
Full health benefits: medical, dental, and vision
Flexible vacation policy
401k
An inclusive, positive team culture
A passionate, collaborative team obsessed with building transformative education technology
Meaningful equity
Health insurance benefits: medical (various PPO/HMO/HSA plans), dental, vision, disability and life insurance
One Medical membership (in participating locations)

Fulltime

Senior Software Engineer

We’re hiring a Senior Software Engineer to join our platform team and improve th...

Location

Poland , Warsaw

Salary:

94000.00 - 121000.00 USD / Year

Invisible Technologies

Expiration Date

Until further notice

Requirements

6+ years of software engineering work experience
Demonstrated expertise with Python and Typescript
Experience designing web APIs and packaged libraries
Fluency in DevOps practices and tooling (CI/CD, observability, Infra as code, etc.)
Ability to strategize across multiple layers of abstraction and reduce complexity

Job Responsibility

Lead the design and evolution of internal tools that abstract the details of deployment
Implement architectural changes to the platform to guarantee security and scalability
Partner with engineering teams to drive adoption and support their usage of our tools
Collaborate with SRE and Security to manage real-world instances of our platform
Author documentation to ease onboarding and user-friendliness of the tools we provide

What we offer

Bonuses and equity are included in offers above entry level

Fulltime

Senior Software Engineer - API Platform

Mastercard

Location:
Portugal

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
January 02, 2026

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