Senior Software Engineer (Full Stack)

Ocean Infinity; Greater London; On-site; GBP 99,000 - 121,000; Full time

Job summary

Ocean Infinity in Greater London is seeking a hands-on Senior Software Engineer with Tech Lead experience for a full-stack product team. You will anchor the technical direction and own how work gets built and shipped while remaining an individual contributor.

Our stack runs on C#/.NET with React and a TypeScript stack. You will lead backend design, collaborate across product, design and QA, and help the team improve through mentorship and code review.

Qualifications

• 6+ years of experience as a software engineer across backend services and web frontends.
• Proven experience as a Tech Lead owning a team's technical approach and delivery.
• Strong backend fundamentals with C#/.NET or Node/TypeScript and React SPA experience.
• Relational databases and ORM with schema and migrations.

Responsibilities

• Set technical direction for a fullstack product and stay hands-on writing and reviewing code.
• Own the how and the when: technical approach, task breakdown, sequencing, capacity, and quality bar.
• Hold the line on backend design discipline to keep services maintainable as the team grows.
• Collaborate with Product, Design, and QA to define, design, and ship features.
• Mentor peers, provide constructive technical feedback, and raise engineering standards.
• Use AI-assisted development tools and promote their effective use within the team.
• Document software and processes as needed.

Skills

C#/.NET

TypeScript

React

Backend design

API design

SQL/ORM

Git

Agile

English fluency

Education

Degree in Computer Science

Tools

Docker

Kubernetes

Kafka

RabbitMQ

SignalR

Azure

CI/CD

Job description

AtOcean Infinity, we're on a bold mission to subsea data using innovative technology.

Using cutting-edge robotics, autonomous technology and world-class software, we're transforming how complex operations are carried out at sea. Our uncrewed systems are making ocean exploration and operationssafer, smarter and more sustainable, helping unlock the vast potential of our oceans while reducing environmental impact.

This isn't a vision for the future.It's happening right now.

As we continue to push the boundaries of innovation and redefine what's possible in the maritime industry, we're looking for exceptional talent to join our fast-growing team.

Ocean Infinity is seeking a hands-on Senior Software engineer with Tech Lead hat experience for a fullstack product team. You are the technical anchor of the team: you own how the work getsbuilt and when it ships, while remaining a strong individual contributor. We are looking forsomeone assertive and entrepreneurial who takes initiative, digs for answers, and helps theteam navigate complex problems rather than waiting for direction.

As with our Senior Engineers, this role is backend-first and stack-plural. Our products runon C#/.NET with React, and on our TypeScript stack (Next.js, tRPC, Node, Postgres). Youshould be strong enough in backend engineering to set and hold the quality bar wherever theteam is building.

What you will do!

• Set the technical direction for a fullstack product across backend services and web applications, and stay hands-on writing and reviewing code;
• Own the how and the when: technical approach, task breakdown, sequencing, capacity, andthe quality bar, and be accountable for delivery;
• Hold the line on backend design discipline, so that services stay maintainable as the teamand codebase grow;
• Collaborate with Product, Design, and QA to define, design, and ship features,distinguishing core engineering work from simpler edge work;
• Facilitate the team's delivery rhythm (stand-ups, planning, refinement, retrospectives)and remove impediments;
• Raise the engineering bar through mentorship, code review, and constructive technicalfeedback;
• Use AI-assisted development tools (such as Cursor or Claude) as part of your everydayworkflow, and help the team use them well;
• Follow development and quality best practices, and be critical when you believe they canbe improved;
• Document software and processes as needed.

What we look for!

• Degree in Computer Science, Information Technology, or related;
• Preferably 6+ years as a software engineer, with production experience across backendservices and web frontends;
• Proven experience as a Tech Lead or in a similar technical-leadership role, owning ateam's technical approach and delivery;
• Strong backend fundamentals: Clean Architecture, design patterns, and API design, with hands-on experience in C#/.NETorNode/TypeScript;
• Proven experience building single-page web apps with React;
• Solid experience with relational databases and an ORM, including schema and migrationmanagement;
• Proficiency with TypeScript and Git;
• Understanding and practice of Agile methodologies;
• Familiarity with web application security concepts;
• Fluency in English, spoken and written;
• Strong communication and the ability to lead by example;
• Critical thinking, initiative, and an entrepreneurial mindset.

Nice to have!

• Experience establishing backend patterns or guidelines on a TypeScript/Node stack;
• Experience with event-driven or event-streaming systems (Kafka, RabbitMQ, or similar);
• Experience with real-time data (WebSockets, SignalR);
• Experience with containerisation and orchestration (Docker, Kubernetes);
• Experience with CI/CD and infrastructure-as-code;
• Familiarity with a cloud platform (Azure, AWS, or GCP);
• Strong understanding of quality management, including relevant standards and procedures.

*Salary: £110,000 Per Annum*