Senior Software Engineer

Liberis

Some key info for you:  🌱 We were founded in 2007 💰 We have provided over $3bn of funding to small businesses so far 🚀 We have been named in CNBC & Statista Top 150 UK Fintechs for 2025 🌍 We're a global team, with a dynamic presence in 6 key locations around the world 🧠 We're a thriving community of over 290 innovative minds 👩🏾 🤝 👨🏼 We're a vibrant melting pot, celebrating over 27 nationalities in our team 🏢 Our team brings experience from over 740 previous companies, from startups to global giants 🎯 We have just been named as one of FinTech’s Finest 50 by Welcome to the Jungle 💪 We’re proud to be an accredited Real Living Wage employer, ensuring everyone is paid fairly for the great work they do   Our Product & Engineering Team: Liberis is building the embedded finance platform that lets partners around the world offer innovative funding products to their small business customers. We're a growth-stage fintech with teams in London, Nottingham, Atlanta, Stockholm, Munich and Mumbai, and we’re building a global Product, Data & Engineering team that thrives on autonomy, ownership, and is focused on impact! Our teams solve real-world problems for small businesses, shaping products that unlock opportunity at scale. Engineering is going through an AI-first transformation, rethinking how teams are structured and how they ship. It's changing what a small team can do! We empower our teams to make decisions, move fast, and take full responsibility for the solutions they deliver. You’ll join a team where curiosity is encouraged and collaboration across Product, Data, Delivery and Engineering is the norm.   The role: At Liberis, we’re building a global engineering team that thrives on autonomy, ownership, and  focused on impact. Our engineers don’t just write code — they solve real-world problems for small businesses, shaping products that unlock opportunity at scale. As a Senior Engineer, you will be a key mentor to other members of the Engineering team - supporting us to continually develop and push the boundaries of what a scaling, multi-product FinTech organisation can achieve! We're hiring across a number of teams in our Engineering org, so we'd love to have a conversation about where you could make the biggest impact! You'll start with an informal chat with Chess (our Internal Recruiter), who will give you more insight into Liberis and what you're looking for next. From there, we'll talk you through the teams we're hiring for and look at which roles could be the best fit. Whether you're passionate about building customer-facing products, scaling platforms, working with data, or exploring how AI can transform the way we build software, we're looking for engineers who enjoy solving complex problems and taking ownership of what they deliver!   The interview process: * Screening call with Chess (Internal Recruiter) (30 mins) * Video interview with the Hiring Manager (45 mins) * In person code pairing interview with a member of Engineering team (1 hour) * Video interview with the wider Liberis team (1 hour)   What We Think You’ll Need * Proven success writing code in two or more programming languages. * A willingness to learn our tech stack - mostly C# .net, Node and React. * Proven experience developing APIs and services * An understanding of working with Agile methods, such as Extreme Programming, Kanban, or Scrum. * Experience mentoring more junior team members. * Resilience in early-stage business situations, where requirements are evolving and experimentation is required. * Bonus points if you have experience of cloud technologies (we are moving to GCP); experience using highly collaborative methods such as ensemble, mob, or pair programming; experience writing financial software; or experience with Test Driven Development.    N.B - there is an ‘on-call’ element to this role, which Chess will outline at the screening stage   Next steps If this opportunity feels like the right fit for your next career move, we’d love to hear from you! Even if you don’t meet every requirement, don’t hesitate to apply or reach out to Chess (Internal Recruiter) on chess.crossley@liberis.com   Our hybrid approach Working together in person helps us move faster, collaborate better, and build a great Liberis culture. Our hybrid working policy requires team members to be in the office at least 3 days a week, but ideally 4 days. At Liberis, we embrace flexibility as a core part of our culture, while also valuing the importance of the time our teams spend together in the office   #LI-FC1

On

IN SHORT  As a Senior Engineer in the Digital Twin team, you will develop the technological infrastructure that enables On to identify products across warehouses, retail stores and beyond using technologies such as RFID. As part of the Operations cluster, this team plays a key role in how we integrate with our supply chain, warehouse and commercial partners, influencing the future success of On. At On, we believe everyone in the world should have access to the best sportswear. For this to happen, we need high performing solutions to ensure that the right product gets to the right customer at the right time, while making the overall process efficient, environmentally friendly and sustainable. YOUR MISSION  * Write well-tested, scalable and reliable code that integrates On’s ERP system with RFID solutions * Develop, maintain and operate cloud-native applications using microservice architectures * Work with your team to design, evaluate and plan forward-looking projects that take On to the next level of technology * Drive technical projects that help us create more robust services * Help shape On’s engineering culture and contribute to its current and future success YOUR STORY  * Extensive experience with TypeScript tech stacks on the backend * Proficient in leading the development of large scale systems in your team * Proven track record of developing, deploying and maintaining cloud-native applications * Build strong collaborative relationships with other engineers, product and business stakeholders * Strong ability to work with a wide range of teams and stakeholders * Past technical experience with ERP and RFID systems and logistics processes or an interest in diving into this area * You communicate effectively in both remote and on-site working environments * Bonus: experience with our current tech stack (Kubernetes, Kafka, MS Dynamics F&O, Terraform) MEET THE TEAM  At On, we believe everyone in the world should have access to the best sportswear. For this to happen, we need high performing solutions to ensure that the right product gets to the right customer at the right time, while making the overall process efficient, environmentally friendly and sustainable. WHAT WE OFFER  On is a place that is centered around growth and progress. We offer an environment designed to give people the tools to develop holistically – to stay active, to learn, explore and innovate. Our distinctive approach combines a supportive, team-oriented atmosphere, with access to personal self-care for both physical and mental well-being, so each person is led by purpose. On is an Equal Opportunity Employer. We are committed to creating a work environment that is fair and inclusive, where all decisions related to recruitment, advancement, and retention are free of discrimination.

Valarian

Valarian Technologies is a dual-use technology company building critical tools to safeguard the future in an era of evolving global security challenges. We're rethinking security beyond traditional military domains, addressing asymmetric threats that impact our technological advantage, economic strength, and democratic institutions.   We build Acra – the platform foundation for everything we do as a dual-use technology company. The platform’s name, rooted in the Greek word for citadel (or, fortress), reflects the design and purpose of our infrastructure-agnostic secure enclaves: protecting critical data. Some of the government and commercial workflows include: increased operational resiliency for mission-critical systems and functions; enabling organizations to more quickly and widely adopt emerging technologies while ensuring the integrity of their intellectual property; information flow during disaster response scenarios, and zero-trust / least-privilege environments for M&A, attorney-client privileged communications, etc. And we’ve only scratched the surface.   At our core, we're driven by a shared mission and a belief in making a tangible impact on our world. Whether you join our London HQ or the wider global organisation, you’ll be a part of collaborative, high-performing teams, creating cutting-edge software, platforms, and infrastructure.     The Role   You will design, build, and operate backend and platform services for ACRA, a complex security-focused Kubernetes platform that needs to be reliable, observable, scalable, and secure from the start. You will work primarily in Go, building microservices, APIs, internal platform services, and event-driven systems. You will own services end to end: from system design and implementation through to containerisation, deployment, monitoring, debugging, and production operations. You will help shape the infrastructure and delivery foundations around the platform, including Docker, Kubernetes, CI/CD pipelines, GitOps workflows, container registries, secrets management, deployment automation, and Argo-based delivery flows. You will contribute to core platform primitives such as identity-aware service communication, lifecycle orchestration, policy-driven deployment, auditability, observability, and controlled application execution. ACRA’s architecture separates the control plane, platform enforcement layer, and isolated execution environments, so this role requires someone who can reason clearly about trust boundaries, failure domains, and operational responsibility. This is not a role for someone who only wants to take tickets. We are looking for someone who understands the product vision, challenges assumptions, proposes better designs, and helps translate ambiguous requirements into robust technical systems. As ACRA grows, this role offers a clear path to increasing technical ownership and influence. You will not just build services and move on; you will help maintain, evolve, and scale the systems you own over time. You will also help raise the bar for how we design, review, deploy, operate, and learn as an engineering team. You do not need to have worked with every tool in our stack before. We are looking for strong engineering judgement, curiosity, ownership, and the ability to build reliable systems in complex environments.   What you’ll do:   Build and own backend services, APIs, microservices, and platform components in Go. Own services from system design through implementation, deployment, observability, and production operations. Design event-driven, scalable, observable, and resilient systems. Build and improve Docker images, Kubernetes workloads, CI/CD pipelines, and Argo/GitOps workflows. Work with container registries, secrets, secure configuration, and deployment automation. Contribute to platform architecture, system design, security boundaries, and operational models. Help build platform capabilities such as workload isolation, policy enforcement, auditability, and identity-aware communication. Work closely with product, leadership, and engineering to turn ambiguous requirements into reliable technical solutions. Make pragmatic technical trade-offs and explain them clearly. Improve monitoring, logging, tracing, alerting, and production debugging. Raise engineering standards through design reviews, code reviews, documentation, and operational improvements. Operate independently in a startup environment with strong ownership and product thinking.   What we are looking for: