Senior Python Software Developer - Backend Job at Xelix (London)

Senior Backend Software Engineer

Atlassian is looking for Engineers to join one of our Sydney engineering teams (...

Location

Australia , Sydney

Salary:

Not provided

Atlassian

Expiration Date

Until further notice

Requirements

Expert-level experience with one or more prominent languages such as Java, Kotlin, Golang, Python, C#, C/C++, or Ruby is required
Highly-trusted knowledge in at least one domain and working knowledge in multiple tech domains
Passion for collaborating with and mentoring junior members of the team
Considers the customer impact when making technical decisions
A real appetite for learning and growing, both as an individual and teammate

Job Responsibility

Drive large, complex projects autonomously, from technical design to launch
Determine plans-of-attack on large projects
Tackle complex architecture challenges, apply architectural standards and start using them on new projects
Lead code reviews & documentation as well as take on complex bug fixes, especially on high-risk problems
Be an example for thorough, meaningful code reviews
Partner across engineering teams to tackle company-wide initiatives spanning multiple projects
Transfer your depth of knowledge from your current language to excel as a Java developer
Mentor more junior members

What we offer

Health and wellbeing resources
Paid volunteer days

Senior Backend Developer

We are seeking a skilled and experienced Backend Developer with 5 to 8 years of ...

Location

India

Salary:

Not provided

NorthBay

Expiration Date

Until further notice

Requirements

Proven experience in backend development with Python or Node.js
Strong understanding of microservices architecture and RESTful API design
Experience with containerization tools like Docker and orchestration with Kubernetes
Knowledge of testing frameworks (e.g., PyTest, Mocha, Jest) and test-driven development practices
Hands-on experience with SQL, NoSQL (e.g., MongoDB, DynamoDB), and Vector databases (e.g., Pinecone, FAISS)
Experience deploying and managing applications on cloud platforms (AWS, Azure, or GCP), including compute services, serverless functions, cloud databases, and networking components
Strong problem-solving skills, communication abilities, and a collaborative mindset
Self-motivated and able to work independently in a distributed team environment

Job Responsibility

Design, develop, and maintain robust and scalable RESTful APIs for enterprise-level applications
Build and deploy microservices using modern backend frameworks with a strong emphasis on performance and maintainability
Implement containerized applications using Docker and Kubernetes
Write unit and integration tests using relevant testing frameworks to ensure code quality and system reliability
Collaborate with cross-functional teams including front-end developers, DevOps, and data engineers to deliver high-quality software solutions
Optimize backend performance and ensure security compliance throughout the development lifecycle
Maintain and work with various database technologies including SQL, NoSQL, and Vector databases
Deploy, monitor, and troubleshoot applications in cloud environments (compute, serverless, networking, storage)

Fulltime

Senior Software Engineer I, Backend

As a Senior Software Engineer I at Aledade, we maintain, improve, and expand our...

Location

United States

Salary:

Not provided

Aledade, Inc.

Expiration Date

Until further notice

Requirements

BS/BTech (or higher) in Computer Science, Engineering or a related field
4+ years experience as an engineer building full-stack web applications as part of a cross-functional team
3+ years of experience working with SQL or other database querying language on large multi-table data sets
2+ years of experience acting as a trusted technical decision-maker in a team setting, solving for short-term and long-term business value
2+ years of experience coaching other engineers

Job Responsibility

Develop and implement scalable and performant solutions
Partner, as a peer, with Engineering Managers, Product Managers, and stakeholders throughout Aledade to develop and execute technical roadmaps using Agile processes
Mentor and coach more junior engineers including thorough pull request reviews for other developers and be receptive to critical feedback on your own work

Fulltime

Senior Software Engineer, Backend

Affirm is reinventing credit to make it more honest and friendly, giving consume...

Location

Canada

Salary:

150000.00 - 200000.00 CAD / Year

Affirm

Expiration Date

Until further notice

Requirements

4+ years of experience designing, developing and launching backend systems at scale using languages like Python or Kotlin
track record of developing highly available distributed systems using technologies like AWS, MySQL and Kubernetes
familiar with processing data offline using frameworks like Spark or Ray
knowledge of stream processing architectures and ability to bridge the gap between online and offline systems with hybrid designs
experience defining a technical plan for the delivery of a significant feature or system component with an elegant, simple and extensible design
write high quality code that is easily understood and used by others
proficient at making significant changes in a large code base, and have developed a suite of tools and practices that enable you and your team to do so safely
experience demonstrates that you take ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders
strong verbal and written communication skills that support effective collaboration with our global engineering team

Job Responsibility

own and deliver quarterly goals for your team, lead engineers on your team through ambiguity to solve open-ended problems, and ensure that everyone is supported throughout delivery
support peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade-offs
proactively identify project, process, technology or business issues, advocate for them, and lead in solving them
support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on-call efforts
foster a culture of quality and ownership on your team by setting or improving code review and design standards for your team, and advocating for them beyond your team through your writing and tech talks
help develop talent on your team by providing feedback and guidance, and leading by example

What we offer

monthly stipends for health, wellness and tech spending
100% subsidized medical coverage, dental and vision for you and your dependents
equity rewards
flexible Spending Wallets - generous stipends for spending on Technology, Food, various Lifestyle needs, and family forming expenses
competitive vacation and holiday schedules
employee stock purchase plan enabling you to buy shares of Affirm at a discount

Fulltime

Senior Software Engineer - Developer Productivity

As a Software Engineer focused on Developer Productivity, you will work on desig...

Location

United States , San Mateo

Salary:

170000.00 - 260000.00 USD / Year

Skydio

Expiration Date

Until further notice

Requirements

Understand cloud platforms architecture, especially networking, security, storage, and resilient application topologies
Familiarity with Bazel, Starlark, and maintaining rule sets
Prior experience implementing Continuous Deployment practices
Can write and test software in Go and Python
Bachelor’s degree in Computer Science or relevant experience

Job Responsibility

Identify and lead internal cross-team projects end-to-end with a keen eye for simplicity, reliability, and a low-friction developer experience
Feature and app development to streamline developer workflows, which span on-premises workstations, cloud workstations, backend services and other development productivity improvements
Build and maintain tooling common to engineering to improve deployments, observability, and scalability
Identify ways to deliver software updates to our customers more quickly
Improve the functionality, performance, and reliability of core build architecture and corresponding build infrastructure services including remote execution, remote cache, and build analytics
Educate developers and evangelize best practices on code quality, development workflows, and test

What we offer

Equity in the form of stock options
Comprehensive benefits packages
Relocation assistance may also be provided for eligible roles
Paid vacation time
Sick leave
Holiday pay
401K savings plan
Group health insurance plans

Fulltime

Senior Software Developer, Backend Platform

Join us in building the future of finance. Our mission is to democratize finance...

Location

Canada , Toronto

Salary:

145000.00 - 170000.00 CAD / Year

Robinhood

Expiration Date

Until further notice

Requirements

Significant experience building scalable backend systems in Go and/or Python
Deep familiarity with server-side frameworks such as Django or Go-based systems
Strong track record designing or maintaining internal developer platforms or shared infrastructure
Experience mentoring engineers, guiding technical decisions, and contributing to team-wide strategies
Passion for developer productivity, quality engineering practices, and thoughtful abstraction

Job Responsibility

Design and lead high-impact projects to improve frameworks, common libraries, and the backend development lifecycle
Own and evolve core tooling used across the monorepo — including static analysis, code formatting, and project scaffolding
Build delightful developer experiences with enhanced IDE plugins (VSCode, Goland, PyCharm) and interface definition tools like Protobuf
Drive best practices in backend architecture through standardization, automation, and opinionated defaults
Mentor engineers across the org and champion team values like “Start with Why” and “Easy to Make the Right Choice”
Collaborate with cross-functional stakeholders to align on tooling investments, migration strategies, and security improvements

What we offer

bonus opportunities
equity
benefits

Fulltime

Senior Backend Software Engineer

The Coaching team builds Highspot’s personalized, AI-enhanced coaching capabilit...

Location

Canada , Vancouver

Salary:

146000.00 - 178000.00 CAD / Year

Highspot

Expiration Date

Until further notice

Requirements

Bachelor’s degree in Computer Science or equivalent practical experience
5+ years of experience in back-end software development building and maintaining large-scale web applications
At least 3 years of experience working with object-oriented programming languages
Ruby and Python preferred
Experience architecting, building, and deploying mid-to-large scale web applications in a distributed environment
Strong understanding of API design, data modeling, and backend scalability
Experience integrating or working with AI/LLM platforms such as OpenAI, Anthropic (Claude), or Azure OpenAI
Familiarity with AI-powered development tools (e.g., Cursor, GitHub Copilot, Cody, etc.) and a demonstrated ability to incorporate them effectively into day-to-day workflows
Deep expertise in web performance, security, and reliability best practices
Proven ability to deconstruct complex technical problems and deliver elegant, maintainable solutions

Job Responsibility

Design, develop, and maintain high-quality, scalable, and user-centric backend systems using modern technologies
Architect and optimize backend infrastructure to power intelligent, AI-driven workflows and Agentic AI integrations
Build and maintain integrations with multiple large language models (LLMs) including ChatGPT, Claude, and other OpenAI and Microsoft models
Collaborate closely with AI/ML engineers to productionize agentic workflows and autonomous reasoning systems
Partner effectively with Product Management and UX Design to translate ideas and research into production-ready, AI-enhanced features
Leverage AI-assisted development tools such as Cursor, GitHub Copilot, and other code generation frameworks to accelerate development and improve code quality
Lead and mentor engineers through complex projects, emphasizing clean architecture, testing, and software craftsmanship
Drive backend infrastructure improvements that enhance reliability, observability, and performance
Collaborate cross-functionally to deliver differentiated customer value through AI and data-driven solutions
Troubleshoot and resolve critical production issues while contributing to internal documentation and best practices

What we offer

Comprehensive medical, dental, vision, disability, and life benefits
Group Retirement Savings Plan (RRSP) and matching employer contributions (DPSP) with immediate vesting
Flexible PTO
Generous Holiday Schedule + 5 Days for Annual Holiday Week
Quarterly Recharge Fridays (paid days off for mental health recharge)
Flexible work schedules
Access to Coaches and Therapists through Modern Health
2 Volunteer days per year
Monthly transportation allowance for employees that work in our Vancouver Hub location
Employees are eligible to receive stock options

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

Senior Python Software Developer - Backend

Xelix

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:
January 04, 2026

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Senior Python Software Developer - Backend

Xelix

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:January 04, 2026

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