Jobs at Duplo

Responsibilities

Backend Development:

• Design, develop, and maintain scalable, reliable backend systems using TypeScript and NestJS, with a focus on correctness in financial systems
• Design robust service boundaries and maintainable architecture across distributed services
• Architect and optimize PostgreSQL schemas for scale, including transaction handling, indexing strategy, and patterns that protect data correctness
• Apply Redis effectively for caching, coordination, rate-limiting, and distributed locking.

Cloud Infrastructure:

• Reason effectively about deployment safety, observability, scaling, and incident diagnosis in production environments running on Docker, Kubernetes, and AWS
• Maintain strong operational understanding of configuration and secrets handling, runtime behaviour, and rollback strategy
• Work closely with DevOps to ensure infrastructure decisions support reliability; treating infrastructure as a shared concern.

Technical Leadership:

• Champion technical design and implementation for large, high-risk, or high-complexity initiatives
• Break down complex technical requirements into manageable, well-sequenced work
• Mentor and guide junior engineers, raising engineering standards through example
• Make sound, well-reasoned decisions on architectural trade-offs, migration approaches, and rollout safety, and know when to escalate decisions with broader business impact.

Quality & Risk Ownership:

• Understand edge cases in money movement and design with operational safety and compliance in mind, not just functional correctness
• Drive thorough testing practices to ensure robust, reliable code before it reaches production
• Take responsibility for overall outcomes, not just tasks.

Collaboration:

• Work seamlessly with cross-functional partners  including product, compliance, finance, operations, support, QA, DevOps, and external providers, communicating clearly and adapting your approach to whoever you are working with
• Collaborate closely with fellow engineers through code review, pairing, and technical discussion, giving and receiving feedback in a way that raises the quality of the team's work, not just yours.

Documentation and Communication:

• Create clear technical documentation for system designs, APIs, and processes
• Communicate effectively with stakeholders through technical breakdowns and status updates.

Requirements

Technical Skills:

• Minimum of 7 years of backend engineering experience, with deep expertise in TypeScript and NestJS
• Strong command of PostgreSQL, including schema design for scale, transaction handling, and indexing strategy
• Practical expertise with Redis for caching, coordination, rate-limiting, and distributed locking
• Strong operational understanding of Docker, Kubernetes, and AWS
• Experience working within Agile/Scrum methodologies.

Software Engineering:

• Demonstrated experience in fintech systems, including orchestration, provider integration resilience, and compliance-sensitive design
• Deep understanding of sound architectural trade-offs and patterns that protect correctness in financial systems
• Strong commitment to writing clean, testable, maintainable code.

Professional Skills:

• A track record of owning complex, high-stakes technical work from design through to production, and standing behind the outcomes
• Strong communication skills, with the ability to work effectively across engineering, product, compliance, and external partners
• A demonstrated habit of catching your own issues before they reach QA or production, and of treating failure as something to learn from rather than deflect.

Experience:

• Experience mentoring or raising the technical standard of a team, not just delivering individually
• Demonstrated experience working in fintech or another high-compliance industry.

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• As the DevOps Intern, you will work closely with experienced engineers, get hands-on exposure to real infrastructure, and be given tasks you are genuinely responsible for completing. 
• You will learn fast, ask good questions, and bring genuine care to the work.
• This is a role for someone who is curious, pays attention to detail, and takes their work seriously. 
• You'll be required to show up with the right attitude, follow things through, ask questions when you are stuck, and care about doing things properly rather than just getting them done.

Responsibilities

• Support the team in monitoring system health, flagging anything unusual and escalating promptly when something does not look right
• Assist with maintaining CI/CD pipelines and learn how code moves safely from development through to production
• Help manage and document configuration and environment variables across development and staging environments under the guidance of senior engineers
• Write simple scripts to automate repetitive operational tasks, with support and code review from the team
• Assist with Docker-based workflows, learning how containerised services are built, run, and debugged
• Participate in incident response by assisting with diagnosis and taking clear notes to help the team learn from what went wrong
• Maintain clear, accurate documentation for tasks you work on so that your work is useful beyond your internship
• Take ownership of the tasks assigned to you; if something is not working, follow it through rather than leaving it for someone else to pick up.

Requirements

• Bachelor’s Degree in Computer Science, Software Engineering, or a related technical field
• Basic understanding of Linux and the command line; comfortable navigating a terminal and running simple commands
• Some exposure to any scripting language Bash, Python, or similar; from coursework or personal projects
• Familiarity with version control and Git basics
• A genuine interest in infrastructure, cloud systems, and how software runs in production
• Good verbal and written communication skills
• A willingness to learn quickly, receive feedback openly, and take responsibility for the work you are given
• Any personal or academic exposure to Docker, cloud platforms such as AWS, or CI/CD tools
• Experience setting up or contributing to any project that involved deployment, hosting, or automation; a personal side project counts.

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Responsibilities

Testing and Automation: 

• Assist in developing and executing automated test scripts using Cypress, with
• Guidance from senior QA team members.
• Learn and support basic API testing to help validate backend functionality and Integrations.

Quality Assurance:

• Help create test plans, test cases, and test data based on product requirements, with review from senior QA.
• Conduct functional, regression, and end-to-end manual testing to support product stability and reliability.

Collaboration:

• Work closely with developers, product managers, and stakeholders to understand
• Requirements and testing needs.
• Help break down requirements into testable scenarios and communicate findings clearly to the team.

Documentation:

• Write clear documentation for test plans, test scripts, and defect reports.
• Contribute ideas and observations to help improve QA processes and workflows.

Requirements

Technical Skills:

• Basic understanding of or willingness to learn Cypress for UI and functional testing (training will be provided).
• Interest in API testing tools such as Postman — prior hands-on experience is a plus
• Familiarity with version control basics (e.g., Git) is helpful. 

QA Principles:

• Basic understanding of software testing concepts and QA processes, gained through coursework, personal projects, or prior exposure.
• Curiosity and attention to detail — able to spot edge cases and unusual scenarios with guidance.

Professional Skills:

• Strong problem-solving and analytical mindset.
• Clear written and verbal communication for documentation and reporting issues.
• Ability to collaborate with cross-functional teams and manage time across multiple tasks.