Home › Companies › Onlinefilings › Senior Software Engineer
Senior Software Engineer
Onlinefilings · London, London, City of, WC2A 1HR, United Kingdom · Hybrid · Active · BambooHR
Job facts
| Field | Value |
|---|---|
| Company | Onlinefilings |
| Title | Senior Software Engineer |
| Normalized title | - |
| Department / team | Technology |
| Location | London, London, City of |
| Work model | Hybrid / Hybrid |
| Employment type | Full Time |
| Salary | - |
| Status | active |
| ATS provider | BambooHR |
| Posted / first seen | 2026-02-12 / 2026-05-30 |
| Changed / last seen | 2026-05-30 / 2026-06-21 |
Related slices
| Page | What it contains | Open |
|---|---|---|
| Company jobs | Active postings from Onlinefilings. | Open |
| Company breakdowns | Role, location, ATS, and work model facets for this company. | Open |
| ATS provider jobs | Active postings observed through BambooHR. | Open |
| Provider filtered search | The same provider as a filtered job collection. | Open |
| City jobs | Active postings in London. | Open |
| Department jobs | Active postings in Technology. | Open |
| Work model jobs | Active Hybrid postings. | Open |
| Lifecycle events | Open, update, close, and reopen events for this posting. | Open |
| Original posting | Canonical source or apply URL captured from the ATS. | Open |
Linked records
| Company | Onlinefilings |
| Source | 4cdbee31-4b9c-4b3f-baee-cedb80d47b9b |
| ATS provider | BambooHR |
Description
About Online Filings
Our mission is to empower entrepreneurs to realise their dreams, giving them more time to focus on what truly matters.
Our platform simplifies all administrative tasks, allowing entrepreneurs and small business owners to manage their business admin effortlessly and without the usual complexities.
By harnessing cutting-edge technology and data analytics, coupled with outstanding customer service, we provide a seamless experience that emphasises simplicity, efficiency, and rapid execution. Our goal is to remove obstacles, enabling you to achieve success faster and more effectively.
Role Overview
As a Senior Software Engineer, you will play a pivotal role in architecting and developing our next-generation web application and API. This role requires technical leadership, hands-on development, and mentoring of junior developers. You will drive the adoption of best practices, ensuring scalability, security, and performance.
If you are passionate about software development, enjoy solving complex problems, and are ready to lead innovative projects, we encourage you to apply. Join our dynamic team and contribute to building transformative solutions that make a tangible impact.
This role will be eligible for visa sponsorship only for candidates that are already based in the UK.
Key Responsibilities
Technical Leadership:
Lead the technical design and development of scalable, secure web applications and APIs, driving best practices across the development lifecycle.
Architecture & Design:
Oversee system architecture decisions, ensuring alignment with business goals and scalability requirements.
Mentorship:
Mentor and guide junior developers, fostering a collaborative learning environment.
API Development:
Design and build RESTful API endpoints using NodeJS and Express, including detailed API documentation.
Database Management:
Design, optimize, and maintain complex SQL data models, ensuring efficient data structures, query performance, and reliability.
Full-Stack Development:
Develop responsive and performant front-end applications using ReactJS, focusing on UX/UI best practices.
Integration & Automation:
Architect and maintain integrations with external APIs such as AWS, Stripe, Zendesk, Twilio, Google Analytics, Google Ads, HMRC, etc…
Code Quality & Reviews:
Enforce code quality through rigorous reviews, automated testing, and CI/CD processes.
Project Management:
Collaborate with cross-functional teams to gather requirements, set timelines, and deliver high-quality solutions on schedule.
Continuous Improvement:
Stay ahead of industry trends, introducing innovative tools and technologies to enhance development efficiency.
Qualifications and Key Skills
Education:
Bachelor’s in Computer Science or related field from a Tier 1 university.
Experience:
Minimum of 4 years of full-time professional experience in software development, with strong expertise in TypeScript, ReactJS, and Next.JS. Solid experience in building RESTful APIs
Leadership:
Proven track record of leading development teams and managing large-scale projects.
Database Expertise:
In-depth experience with PostgreSQL/SQL, including design of complex schemas, writing queries and performance optimisation.
Security & Performance:
Deep understanding of application security best practices, performance tuning, and scalable architecture.
Problem-Solving:
Ability to troubleshoot complex technical issues, with a proactive and solution-oriented mindset.
Soft Skills:
Excellent communication, organisational skills, and the ability to work independently or within a team.
Preferred Qualifications
Advanced Degrees:
Master’s in Data Science or Software Engineering.
Cloud & DevOps:
Experience with AWS cloud services, Terraform, Docker, Kubernetes
Agile/DevOps:
Experience with Agile methodologies, CI/CD pipelines, and project management tools (Jira, Confluence, Bitbucket).
AI/ML:
Exposure to AI/ML projects or data analytics.
Benefits and Perks
Our comprehensive offering is designed around flexibility, well-being, and continuous growth, ensuring that you have the support and resources to excel both professionally and personally.
Competitive Salary:
£50,000 - £65,000 per year, with potential performance-based increases.
Performance Bonus:
Up to 10% annual bonus.
Generous Holiday Allowance:
27 days holiday plus bank holidays.
Health Insurance:
Private health insurance including dental care, vision, and health screenings.
Lifestyle Benefits : benefit from up to 50% discounts at selected gyms and exclusive lifestyle accessory offers and rewards to support your physical health and well-being.
Mental Health Support : access to up to 8 free Cognitive Behavioural Therapy (CBT) sessions and free annual subscriptions to mindfulness apps like Headspace.
Retirement : We contribute 3% to your pension, for every 5% you contribute.
Powerful computer
to work from your home.
Cycle to work scheme.
Flexible Working Options : hybrid setting (3 days in the office)
Online Filings is an equal opportunity employer. We celebrate diversity and are committed to equal employment and creating an inclusive environment for all employees, irrespective of race, gender, sex, religion, nationality, age or disability.
Full job record
| Job ID | 8acab0c9eab51e02f176706f010195c00001d635 |
| Org ID | c7f52267-3717-461a-be4b-b3b986c56e28 |
| Source ID | 4cdbee31-4b9c-4b3f-baee-cedb80d47b9b |
| Board ID | 4cdbee31-4b9c-4b3f-baee-cedb80d47b9b |
| Provider | bamboohr |
| Provider Job Key | 24 |
| Title | Senior Software Engineer |
| Normalized Title | — |
| Status | active |
| Active | yes |
| Location Text | London, London, City of, WC2A 1HR, United Kingdom |
| Department | Technology |
| Team | — |
| Employment Type | full_time |
| Workplace Type | hybrid |
| Remote Policy | hybrid |
| Country | — |
| Region | London, City of |
| City | London |
| Salary Raw | — |
| Salary Min | — |
| Salary Max | — |
| Salary Currency | — |
| Salary Period | — |
| Source URL | https://onlinefilings.bamboohr.com/careers/24 |
| Apply URL | https://onlinefilings.bamboohr.com/careers/24 |
| First Seen At | 2026-05-30 05:47:46Z |
| Last Seen At | 2026-06-21 10:52:30Z |
| Last Checked At | 2026-06-21 10:52:30Z |
| Last Changed At | 2026-05-30 05:47:46Z |
| Inactive At | — |
| Source Posted At | 2026-02-12 00:00:00Z |
| Source Updated At | — |
| Raw Payload Uri | s3://job-postings-prod-raw-590183727216/raw/provider=bamboohr/board=onlinefilings/date=2026-06-21/2026-06-21T10-52-28-788Z-bf2a486ba5e3090aed398c529d14e97eac7cb1ab7500902206b14ec00bdeb3de.json |
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"description": "<p><span style=\"color: rgba(0, 0, 0, 0.9); font-size: 10pt; font-weight: 600\">About Online Filings</span></p>\n<p>Our mission is to empower entrepreneurs to realise their dreams, giving them more time to focus on what truly matters.</p>\n<p><span><br></span></p>\n<p>Our platform simplifies all administrative tasks, allowing entrepreneurs and small business owners to manage their business admin effortlessly and without the usual complexities.</p>\n<p><span><br></span></p>\n<p>By harnessing cutting-edge technology and data analytics, coupled with outstanding customer service, we provide a seamless experience that emphasises simplicity, efficiency, and rapid execution. Our goal is to remove obstacles, enabling you to achieve success faster and more effectively.</p>\n<p><span><br></span></p>\n<p><span><br></span></p>\n<p><span><span style=\"font-weight: 600\">Role Overview</span></span></p>\n<p>As a Senior Software Engineer, you will play a pivotal role in architecting and developing our next-generation web application and API. This role requires technical leadership, hands-on development, and mentoring of junior developers. You will drive the adoption of best practices, ensuring scalability, security, and performance.</p>\n<p><span><br></span></p>\n<p>If you are passionate about software development, enjoy solving complex problems, and are ready to lead innovative projects, we encourage you to apply. Join our dynamic team and contribute to building transformative solutions that make a tangible impact.</p>\n<p><span><br></span></p>\n<p>This role will be eligible for visa sponsorship only for candidates that are already based in the UK.</p>\n<p><span><br></span></p>\n<p><span><span style=\"font-weight: 600\">Key Responsibilities</span></span></p>\n<ul>\n<li><span><span style=\"font-weight: 600\">Technical Leadership:</span></span><br>Lead the technical design and development of scalable, secure web applications and APIs, driving best practices across the development lifecycle.</li>\n<li><span><span style=\"font-weight: 600\">Architecture & Design:</span></span><br>Oversee system architecture decisions, ensuring alignment with business goals and scalability requirements.</li>\n<li><span><span style=\"font-weight: 600\">Mentorship:</span></span><br>Mentor and guide junior developers, fostering a collaborative learning environment.</li>\n<li><span><span style=\"font-weight: 600\">API Development:</span></span><br>Design and build RESTful API endpoints using NodeJS and Express, including detailed API documentation.</li>\n<li><span><span style=\"font-weight: 600\">Database Management:</span></span><br>Design, optimize, and maintain complex SQL data models, ensuring efficient data structures, query performance, and reliability.</li>\n<li><span><span style=\"font-weight: 600\">Full-Stack Development:</span></span><br>Develop responsive and performant front-end applications using ReactJS, focusing on UX/UI best practices.</li>\n<li><span><span style=\"font-weight: 600\">Integration & Automation:</span></span><br>Architect and maintain integrations with external APIs such as AWS, Stripe, Zendesk, Twilio, Google Analytics, Google Ads, HMRC, etc…</li>\n<li><span><span style=\"font-weight: 600\">Code Quality & Reviews:</span></span><br>Enforce code quality through rigorous reviews, automated testing, and CI/CD processes.</li>\n<li><span><span style=\"font-weight: 600\">Project Management:</span></span><br>Collaborate with cross-functional teams to gather requirements, set timelines, and deliver high-quality solutions on schedule.</li>\n<li><span><span style=\"font-weight: 600\">Continuous Improvement:</span></span><br>Stay ahead of industry trends, introducing innovative tools and technologies to enhance development efficiency.</li>\n</ul>\n<p><span><br></span></p>\n<p><span><br></span></p>\n<p><span><span style=\"font-weight: 600\">Qualifications and Key Skills</span></span></p>\n<ul>\n<li><span><span style=\"font-weight: 600\">Education:</span></span><br>Bachelor’s in Computer Science or related field from a Tier 1 university.</li>\n<li><span><span style=\"font-weight: 600\">Experience:</span></span><br>Minimum of 4 years of full-time professional experience in software development, with strong expertise in TypeScript, ReactJS, and Next.JS. Solid experience in building RESTful APIs</li>\n<li><span><span style=\"font-weight: 600\">Leadership:</span></span><br>Proven track record of leading development teams and managing large-scale projects.</li>\n<li><span><span style=\"font-weight: 600\">Database Expertise:</span></span><br>In-depth experience with PostgreSQL/SQL, including design of complex schemas, writing queries and performance optimisation.</li>\n<li><span><span style=\"font-weight: 600\">Security & Performance:</span></span><br>Deep understanding of application security best practices, performance tuning, and scalable architecture.</li>\n<li><span><span style=\"font-weight: 600\">Problem-Solving:</span></span><br>Ability to troubleshoot complex technical issues, with a proactive and solution-oriented mindset.</li>\n<li><span><span style=\"font-weight: 600\">Soft Skills:</span></span><br>Excellent communication, organisational skills, and the ability to work independently or within a team.</li>\n</ul>\n<p><span><br></span></p>\n<p><span><br></span></p>\n<p><span><span style=\"font-weight: 600\">Preferred Qualifications</span></span></p>\n<ul>\n<li><span><span style=\"font-weight: 600\">Advanced Degrees:</span></span><br>Master’s in Data Science or Software Engineering.</li>\n<li><span><span style=\"font-weight: 600\">Cloud & DevOps:</span></span><br>Experience with AWS cloud services, Terraform, Docker, Kubernetes</li>\n<li><span><span style=\"font-weight: 600\">Agile/DevOps:</span></span><br>Experience with Agile methodologies, CI/CD pipelines, and project management tools (Jira, Confluence, Bitbucket).</li>\n<li><span><span style=\"font-weight: 600\">AI/ML:</span></span><br>Exposure to AI/ML projects or data analytics.</li>\n</ul>\n<p><span><br></span></p>\n<p><span><br></span></p>\n<p><span><br></span></p>\n<p><span><span style=\"font-weight: 600\">Benefits and Perks</span></span></p>\n<p>Our comprehensive offering is designed around flexibility, well-being, and continuous growth, ensuring that you have the support and resources to excel both professionally and personally.</p>\n<p><span><br></span></p>\n<ul>\n<li><span><span style=\"font-weight: 600\">Competitive Salary:</span></span><br>£50,000 - £65,000 per year, with potential performance-based increases.</li>\n<li><span><span style=\"font-weight: 600\">Performance Bonus:</span></span><br>Up to 10% annual bonus.</li>\n<li><span><span style=\"font-weight: 600\">Generous Holiday Allowance:</span></span><br>27 days holiday plus bank holidays.</li>\n<li><span><span style=\"font-weight: 600\">Health Insurance:</span></span><br>Private health insurance including dental care, vision, and health screenings.</li>\n<li><span><span style=\"font-weight: 600\">Lifestyle Benefits</span></span>: benefit from up to 50% discounts at selected gyms and exclusive lifestyle accessory offers and rewards to support your physical health and well-being.</li>\n<li><span><span style=\"font-weight: 600\">Mental Health Support</span></span>: access to up to 8 free Cognitive Behavioural Therapy (CBT) sessions and free annual subscriptions to mindfulness apps like Headspace.</li>\n<li><span><span style=\"font-weight: 600\">Retirement</span></span>: We contribute 3% to your pension, for every 5% you contribute.</li>\n<li><span><span style=\"font-weight: 600\">Powerful computer</span></span><br>to work from your home.</li>\n<li><span><span style=\"font-weight: 600\">Cycle to work scheme.</span></span></li>\n<li><span><span style=\"font-weight: 600\">Flexible Working Options</span></span>: hybrid setting (3 days in the office)</li>\n</ul>\n<p><span><br></span></p>\n<p><span><br></span></p>\n<p>Online Filings is an equal opportunity employer. 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