Senior Software Engineer (Java/Go)

Nitro, Inc.; Porto; Hybrid; EUR 55,000 - 65,000; Full time

Benefits offered by this job

Hybrid work model

Health, dental and vision benefits

Pension matching / Retirement benefits

Job summary

Nitro is seeking a Senior Back End Software Engineer to design, build, and operate scalable services across a polyglot stack (Python, Go, Rust, Java) and own services end to end on AWS. You will collaborate with product teams to deliver robust, observable systems and drive performance and security improvements.

Based in Porto with a hybrid work model, you will mentor peers, shape internal tooling, and contribute to high-velocity development across Nitro's engineering teams.

Qualifications

• 5+ years of backend software development experience.
• Proficient in two or more of Python, Go, Rust, or Java.
• Experience with AWS, Docker, Kubernetes, and IaC tools.
• Strong systems fundamentals and performance tuning.
• Experience designing REST and/or gRPC APIs.
• Excellent communication in English.

Responsibilities

• Design, build, and operate scalable, production-grade shared services and internal APIs.
• Take ownership across the full lifecycle: spec, architecture, deployment, and observability.
• Leverage AI-assisted development to improve speed and quality.
• Work across Python, Go, Rust, and Java and choose the right tool for each problem.
• Improve infrastructure, tooling, and CI/CD foundations for other teams.
• Drive reliability, performance, security, and cost efficiency on AWS.

Skills

Backend development

Python

Go

Rust

Java

Tools

Docker

Kubernetes

Terraform

AWS

SQS

Kafka

Job description

Senior Software Engineer (Java/Go)

Senior Software Engineer (Java/Go)

Porto

About Us:

A global SaaS leader for seamless digital document workflows, Nitro offers a suite of solutions for PDF, eSigning, identity verification and analytics supported by a best-in-class customer success and change management team.With more than 3 million licensed users and 13,000+ business customers across 157 countries, we serve 67% of the Fortune 500.

How We Work:

We aim to create an environment where talented individuals are empowered to excel. How we collaborate, innovate, and engage with one another is important to us. Our work is driven by 5 key principles:

• One team, One mission
  Our collective dedication to Nitro's mission defines us. Together, we are building an environment where everyone feels like a valued part of something bigger than themselves.

• Own it
  We take full ownership of our actions and decisions. We empower one another to lead with confidence, creativity, and a solutions-focused mindset.

• Accountable to our customers
  We are dedicated to our customers and take our commitments seriously. We do what we say we are going to do.

• Excellence in execution
  Driven by passion and precision, we exemplify excellence in our delivery with innovative, top-quality results.

• Be bold, fail fast, learn faster
  We learn as we grow, dare to try, and bravely question. We are not chasing perfection but forever iterating towards it.

These guiding values shape our approach to work, fostering a culture where everyone is inspired to contribute their best.

Why Nitro Shared Services

Engineering is a critical function at Nitro, developing the products and services at the heart and soul of our business today, and helping us realise our vision of smarter documents in the future. We have an incredibly talented and diverse Engineering team that cares deeply about our users, with a strong culture that believes in building the right things and building them the right way.

Our Shared Services team builds the foundations that the rest of Nitro Engineering builds on – the core services, internal APIs, libraries, infrastructure, and developer tooling that our cloud products depends on. The work is broad by design: one week you might be building for speed in a high-throughput file management service, the next designing a shared API or improving our services delivery. If you enjoy working across languages and layers of the stack, and want your work to multiply the impact of every other team, this team is for you.

The Role

We are seeking a Senior Back End Software Engineer to design, build, and operate the foundational services that the rest of Nitro Engineering builds on. You will work across a polyglot codebase – Python, Go, Rust, and Java – and own services end to end, from specification and architecture through to deployment, observability, and production support on AWS. This is a role for a broad, systems-minded engineer who enjoys solving the hard shared problems once, and well, so that every product team benefits.

What You’ll Be Doing

• Designing, building, and operating scalable, production-grade shared services, internal APIs, and libraries used across Nitro's product teams

• Taking full ownership of services across the complete lifecycle: from technical spec and architecture to deployment, observability, and production support

• Leveraging agentic coding workflows and AI-assisted development tools to maximise development speed and quality

• Working across multiple languages and runtimes – Python, Go, Rust, and Java – and choosing the right tool for each problem

• Building and improving the infrastructure, developer tooling, and CI/CD foundations that let other engineering teams ship faster and more safely

• Driving reliability, performance, security, and cost efficiency across our AWS footprint

• Developing and maintaining robust automated test suites (unit, integration, and end-to-end)

• Working closely with Engineering Managers, product teams, and peer engineers in a fast-paced Dublin/Porto team

• Sharing knowledge, contributing to technical standards, and mentoring more junior engineers

What We’re Looking For

• 5+ years’ professional experience in backend software development

• Strong, hands-on experience in at least two of Python, Go, Rust, and Java, with the ability to work effectively across all of them

• Demonstrated experience with agentic coding workflows and AI-assisted development from spec to production

• Solid systems fundamentals: networking, concurrency, operating systems, memory and performance tuning

• Experience building and operating cloud-native services on AWS using Docker, Kubernetes, and infrastructure-as-code (Terraform or similar)

• Strong DevOps mindset to work with SRE team building systems

• Experience designing and building REST and/or gRPC APIs, SDKs, or shared libraries consumed by other teams

• Experience with SQL and NoSQL databases such as Postgres, MySQL, DynamoDB, and Redis

• Experience with asynchronous and event-driven architectures: SQS, Kafka, AWS Lambda, Step Functions, or similar

• Hands-on experience with CI/CD tooling, observability (metrics, logging, tracing), and modern DevOps practices

• Strong understanding of testing practices and quality engineering

• Excellent communication skills and experience working in a collaborative agile team

• Comfortable working at pace in a dynamic, fast-moving product environment

Bonus Points For

• Experience in a platform, infrastructure, SRE, or developer-experience team supporting multiple product teams

• Experience building internal developer tooling, build systems, or CI/CD platforms at scale

• Security experience: IAM, secrets management, or authentication and authorisation services

• Experience building AI or LLM-powered production applications, or MCP (Model Context Protocol) servers

• Experience with PDF processing libraries or document manipulation at scale

• Open source contributions in any of the languages above

Why Nitro?

Along with our regular benefits and programs (including health, dental, vision, and retirement as standard), we are also very proud to offer a few additional initiatives to future Nitronauts:
Hybrid Work
Our team embraces the hybrid work model, appreciating its blend of flexibility and structure. We combine three days of in-person collaboration at our global offices in Toronto, Dublin, Antwerp, Porto, and Melbourne with the convenience of two days of remote work each week.
Benefits:
Nitro provides all employees with a comprehensive benefits package that includes health insurance, dental and vision coverage, and wellness perks. We also offer pension/401k matching, along with many other country-specific benefits.

Nitro strongly encourages applications from everyone regardless of race, religion, colour, national origin, gender, sexual orientation, age, marital status or disability status. We provide an accessible candidate experience and invite you to request any accommodations or adjustments throughout the interview process and beyond. Salary Range for this position is €55,000 -€65000 per year.

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