Senior Software Engineer (Full Stack)

Ocean Infinity; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

Ocean Infinity in London is seeking a Senior Software Engineer (Full Stack) to lead technical direction while remaining hands-on. You will own backend-first architecture across C#/.NET and Node/TypeScript stacks, collaborate with Product, Design and QA, and mentor the team to raise the engineering bar.

Strong communication and delivery focus required. Experience with React, PostgreSQL, Docker/Kubernetes, and Agile practices is highly valued, as is the ability to ship reliable software in a

Qualifications

• Degree in Computer Science, Information Technology, or related field.
• 6+ years of software engineering experience with backend and frontend work.
• Proven Tech Lead or similar leadership experience owning delivery.

Responsibilities

• Set technical direction for fullstack product across backend services and web apps.
• Stay hands-on with coding, code reviews, and quality bar maintenance.
• Collaborate with Product, Design, and QA to ship features.
• Mentor engineers and raise the team’s engineering bar.
• Guide delivery rhythms and optimize architecture for maintainability.

Skills

6+ years experience

Tech Lead experience

Backend-focused

TypeScript

Git proficiency

English fluency

Communication & leadership

Agile methodologies

Education

Degree in Computer Science / IT

Tools

C#/.NET

Node/TypeScript

React

PostgreSQL

ORM

Docker

Kubernetes

CI/CD

Azure/AWS/GCP

Job description

At Ocean 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 operations safer, 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 gets built and when it ships, while remaining a strong individual contributor. We are looking for someone assertive and entrepreneurial who takes initiative, digs for answers, and helps the team navigate complex problems rather than waiting for direction.

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

Requirements

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, and the quality bar, and be accountable for delivery;
• Hold the line on backend design discipline, so that services stay maintainable as the team and 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 technical feedback;
• Use AI-assisted development tools (such as Cursor or Claude) as part of your everyday workflow, and help the team use them well;
• Follow development and quality best practices, and be critical when you believe they can be 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 backend services and web frontends;
• Proven experience as a Tech Lead or in a similar technical-leadership role, owning a team's technical approach and delivery;
• Strong backend fundamentals: Clean Architecture, design patterns, and API design, with hands-on experience in C#/.NETor Node/TypeScript;
• Proven experience building single-page web apps with React;
• Solid experience with relational databases and an ORM, including schema and migration management;
• 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.

Senior Software Engineer (Full Stack) • London, England, GB