Jobs Golang

We are looking for a Staff Software Engineer to take technical ownership of a new component of an enterprise network security platform operating across complex IT, OT and IoT environments.

You will join at the beginning of a new product component and engineering team, designing the architecture and building the solution from the ground up.

This is a hands-on technical leadership role, not people management. You’ll work closely with Product, QA and other engineering teams while remaining deeply involved in architecture and coding.

What You’ll Do

• Design and build a new platform component from scratch.
• Own architecture and key technical decisions through production implementation.
• Develop core backend and infrastructure components primarily in Go.
• Work with the platform’s data plane, distributed systems and data flows.
• Build scalable, reliable services using Kubernetes and cloud-native infrastructure.
• Work with PostgreSQL, APIs and service-to-service communication.
• Provide technical direction as the new engineering team grows.
• Use modern development approaches, including AI-assisted coding tools such as Claude Code.

What We’re Looking For

• Experience as a Staff / Principal / Lead Engineer, Software Architect, or equivalent senior hands-on role.
• Excellent Go / Golang skills — core requirement.
• Strong software architecture and system design experience.
• Proven experience designing and building complex distributed systems.
• Strong backend and infrastructure engineering background.
• Hands-on experience with Kubernetes and cloud-native environments.
• Experience with PostgreSQL and production data architecture.
• Good understanding of data plane architecture, networking, APIs, concurrency, performance, scalability and reliability.
• Ability to turn ambiguous requirements into architecture and working production systems.
• High degree of technical ownership and independence.
• Comfortable working in a fast-moving startup environment with a strong delivery focus.

Nice to Have

• Python and/or Java development experience.
• Experience with networking, cybersecurity or infrastructure platforms.
• Experience with microsegmentation, policy enforcement or similar network security systems.
• Experience with Claude Code or other AI coding agents.
• Public technical leadership, such as conference speaking or engineering community contributions.

Other details:

Location & Working Model

• CET timezone.
• Kraków is preferred, with weekly office collaboration.
• Strong candidates elsewhere within the required time zone can be considered.
• B2B contract with a US entity.
• Output-oriented working model.
• Company laptop provided.

Interview Process

1. 30-minute discussion with engineering leadership.
2. Technical deep dive with live coding and architecture discussion.
3. Final technical/culture discussion if needed.

English - B2-C1
Rate - Flexible

We are looking for a Senior Go Developer to join our engineering team and work on a long-term product development project.
 

Requirements

• 5+ years of commercial software development experience
• Strong hands-on experience with Go / Golang
• Experience building and maintaining production backend systems
• Good understanding of software architecture and development best practices
• Experience designing and developing APIs
• Ability to write clean, maintainable and well-tested code
• Experience working with Git and modern development workflows
• Strong problem-solving skills
• Ability to work independently and take ownership of technical tasks
• Good communication skills and ability to collaborate with a development team
   

Responsibilities

• Develop and maintain backend services using Go
• Design and implement new features and APIs
• Participate in architectural and technical decisions
• Write and review production-quality code
• Improve system reliability, performance and maintainability
• Collaborate with other engineers and stakeholders
• Contribute to technical documentation and development best practices
   

Tech Stack

• Go / Golang
• Backend / APIs
• Git
• Modern software architecture

RedCore is an international business group that creates technological solutions for digital markets. Our products and services cover fintech, marketing, e-commerce, customer service, communications, and regulatory technologies.

We are looking for a Senior Go Engineers! 

Requirements:

• 4+ years of experience with Go programming language.
• Proven ability to design and implement scalable and reliable software solutions.
• Strong understanding of event-driven architecture.
• Experience with containerization and orchestration tools like Docker and Kubernetes.
• Hands-on experience with RDBMS and/or NoSQL databases.
• Strong understanding of event-driven architecture + hands-on experience with Event Brokers.
• Experience with observability — implementing logs, metrics, and tracing.
• Proficiency in working with cloud platforms such as Google Cloud Platform (GCP) and/or AWS.
• Proficient in using Git, GitLab, and GitLab CI for source control and continuous integration.
• Excellent problem-solving abilities.
• Strong time management and organizational skills to handle multiple tasks effectively.
• Upper-intermediate level of English, both written and verbal.
   

Nice to have:

• Familiarity with the Twelve-Factor App methodology.
• Knowledge of Cloud Events and GitOps practices.
   

Responsibilities:

• Develop high-performance, testable, and maintainable code to deliver new functionality.
• Conduct code reviews to ensure quality, maintain standards, and share knowledge across the team.
• Integrate industry-leading third-party services into the platform.
• Mentor team members and actively share knowledge to foster growth and collaboration.
• Propose and implement innovative technical initiatives to improve systems and processes.
   

Why Join Us:

• Flexible remote or hybrid working format based on your location.
• No Time Trackers: We value trust and focus on results.
• Career growth, professional development, and regular performance reviews.
   

Hiring Steps: HR Interview > Technical Interview (no test task, no live-coding needed) > Reference check > Offer
 

Our benefits to you:
☘️An exciting and challenging job in a fast-growing business group, the opportunity to be part of a multicultural team of top professionals in Development, Architecture, Management, Operations, Marketing, Legal, Finance and more

🤝🏻Great working atmosphere with passionate experts and leaders, sharing a friendly culture and a success-driven mindset is guaranteed

🧑🏻‍💻Modern corporate equipment based on macOS or Windows and additional equipment are provided

🏖Paid vacations, sick leave, personal events days, days off

💵Referral program — enjoy cooperation with your colleagues and get the bonus

📚Educational programs: regular internal training sessions, compensation for external education, attendance of specialized global conferences

🎯Rewards program for mentoring and coaching colleagues

✈️In-house Travel Service

🦄Multiple internal activities: online platform for employees with quests, gamification, presents and news, clubs for movie / book / pets lovers and more

🎳Other benefits could be added based on your location 
 

We are looking for a Software Engineer - Software Engineer - Identity & Access Management to join our team.

Key Responsibilities:

• Design, develop, and maintain high-throughput, low-latency identity services, including Single Sign-On (SSO), Multi-Factor Authentication (MFA), and session management and federation;
• Implement and scale modern authentication and authorization protocols (OAuth 2.0, OpenID Connect, JWT assertions,..);
• Write clean, concurrent, and highly performant backend code primarily in Golang to support our rapidly growing user base;
• Utilize your DevOps background to deploy, manage, and monitor identity services;
• Act as the subject matter expert on authentication and guide other engineering teams on securely integrating with our identity platform;
  Design and maintain solutions involving custom and standard identity providers, like KeyCloak and AWS Cognito.
   

What we are looking for:

• Solid understanding of web security, and user identity in the context of federated authentication;
• Proven experience as a software engineer building complex, distributed backend systems, with a strong, demonstrated proficiency in Golang and gRPC;
• Deep conceptual understanding and practical experience with modern authentication flows, authorization frameworks, and cryptographic fundamentals (e.g., OAuth2, OIDC, RBAC,..);
• Hands-on experience with modern infrastructure tooling. You should be comfortable with cloud platforms (AWS,..), container orchestration (Kubernetes), and Infrastructure as Code (Terraform, Terragrunt, Tofu,..);
• A solid grasp of secure coding practices, common web vulnerabilities (OWASP Top 10), and how to mitigate them at the architectural level;
• The ability to design scalable systems that can handle massive throughput without compromising on latency or security;
• You can explain complex security and architectural concepts to both technical and non-technical stakeholders, driving consensus across teams.

We offer

• Maximum flexibility;
• Professional trainings, conferences and certifications;
• Corporate events and benefits;
• Professional literature;
• English courses.

Project Description:

We're building a Cloud Observability platform for market leading large Germany based company with 440,000 customers worldwide.
Originally known for leadership in enterprise resource planning (ERP) software, the company has evolved to become a market leader in end-to-end enterprise application software, database, analytics, intelligent technologies, and experience management. A top cloud company with 200 million users worldwide, the company helps businesses of all sizes and in all industries to operate profitably, adapt continuously, and achieve their purpose.

Responsibilities:

• Lead sprint-based feature development for routing and collector-as-a-service platforms
• Develop Kubernetes operators using controller-runtime / Operator SDK (kubebuilder)
• Design and implement CRDs & Admission Webhooks
• Build custom OpenTelemetry Collector distributions and exporters
• Develop frontend components using React / TypeScript / Tailwind / Vite / TanStack
• Implement and maintain Istio service mesh and mTLS/OIDC/JWT security
• Integrate with Open Service Broker / Cloud Broker APIs and enterprise platform services
• Maintain CI/CD pipelines using GitHub Actions and ArgoCD
• Contribute to architecture decisions and create ADRs for major changes
• Participate in developer on-call rotation outside core hours

Mandatory Skills Description:

• Go language development
• Node.js / TypeScript development
• Kubernetes container orchestration
• OpenTelemetry (OTEL) observability
• controller-runtime / Operator SDK (kubebuilder)
• CRDs & Admission Webhooks
• GitHub Actions and ArgoCD CI/CD
• Kustomize configuration management
• Istio / Service Mesh infrastructure
• mTLS / OIDC / JWT / OAuth2 security
• PostgreSQL and Kafka
• ModelContext Protocol (MCP) AI framework
• React / Frontend Stack (TS, Tailwind, Vite, TanStack)
• Open Service Broker / Cloud Broker APIs

Nice-to-Have Skills Description:

• OTEL Collector custom distributions and exporters
• gRPC networking
• Gardener cluster lifecycle management
• GCP / Azure / AWS cloud platforms
• Prometheus / Grafana / Jaeger / Splunk monitoring
• Enterprise platform integration (BTP or similar)
• AI-assisted / spec-driven development practices
• NATS messaging, Helm, HashiCorp Vault, Kyverno, HAProxy
• Sovereign / Air-gapped architecture
• Cost Management & FinOps

About Akvelon:
 
🌎 Akvelon is an American company with offices in Seattle, Mexico, Ukraine, Poland, and Serbia. Our company is an official vendor of Microsoft and Google. Our clients also include Amazon, Evernote, Intel, HP, Reddit, Pinterest, AT&T, T-Mobile, Starbucks, and LinkedIn. To work with Akvelon means to be connected with the best and brightest engineering teams from around the globe and working with an actual technology stack building Enterprise, CRM, LOB, Cloud, AI and Machine Learning, Cross-Platform, Mobile, and other types of applications customized to client’s needs and processes.

About the Role:

We are looking for Senior Back-end (Go) Engineer who will join the team which work on the tools for moderation of posts, comments and replacing manual reviews with new AI tools. 
Project - a large-scale social media platform that enables users to create, share and discuss content within topic-based communities. The project focuses on building and scaling features that support millions of users and high volumes of real-time interactions.

Locations for hiring: 
Argentina, Brazil, Mexico, Canada
Armenia, Austria, Bulgaria, Germany, Hungary, Kazakhstan, Kyrgyzstan, Netherlands, Norway, Poland, Portugal, Serbia

Requirements:
 

• At least 5+ years of relevant experience as a Back-end Engineer (Go/Python/Rust/Ruby) and 2 past years with primary focus towards Go.
• Python experience is a great plus 
• Knowledge of basic datastore technologies (Cassandra, Redis, Postgres)
• Experienced with GraphQL, REST, HTTP, Thrift, gRPC and the ability to design and implement maintainable APIs. 
• Familiarity with SQL 
• Familiarity with unit testing and other automated testing 

Overlap time requirements:
till 12 PM PST on daily basic

Benefits:
 

• Paid vacation and sick leave
• Official state holidays 
• Professional growth through challenging projects and the opportunity to master new technologies
• Flexible working schedule: 8 hours per day, 40 hours per week
• Personal Career Development Plan (CDP)
• Employee support programs (discounts, healthcare, legal assistance)
• Paid external training, conferences, and professional certifications aligned with business goals
• Internal workshops, seminars, and English classes

• Corporate library with paper and e-books

   

Step into your future – apply now 🚀 and send us your CV.

Workload: full-time, remote
Start: asap
Duration: long-term (6-12 months anticipated, final term TBD)
Location: any (Europe timezone alignment)
English: B2/C1

Working Hours: 8 hours/day | Core availability 10:00-17:00 UK time, with flexibility for overlap with Eastern Canada
Hardware: Candidate may use their own laptop; VPN required for production changes or production-data investigation   

RESPONSIBILITIES

Virtual Signer Engineering
• Maintain and improve the Go Virtual Signer, including signing orchestration, communication between participants, encrypted storage, and recovery from failures.
• Investigate concurrency, timeouts, interrupted sessions, network failures, and service restarts; review outstanding pull requests and address race conditions.
• Improve logging and visibility, assess the existing implementation critically, and make careful, maintainable changes.
• Support agreed transaction approval features and future post-quantum signature work.
Cryptography, SDKs & Cross-Platform Integration
• Maintain integrations with MPC and threshold-signature libraries, working with cryptography specialists where changes affect protocol security.
• Contribute to shared SDKs and bindings connecting Go with Swift, Kotlin, and JavaScript/TypeScript.
• Work with backend and mobile engineers to preserve API compatibility and consistent signing behavior across releases.

Quality, Testing & Operations
• Improve automated tests for signing correctness, failure recovery, and interoperability between virtual and mobile signers.
• Support Linux and Docker deployments, dependency upgrades, monitoring, release processes, and operational documentation.

Ownership & Technical Judgment
• Take primary ownership of a security-critical codebase with limited handover and independently establish a robust production baseline.
• Assess technical risks and trade-offs, explain decisions clearly, and make incremental changes with sound security judgment.
• Collaborate pragmatically with backend, mobile, testing, and cryptography specialists across time zones.

REQUIREMENTS !!!
Essential Technical Experience
• Strong hands-on production Go, including goroutines, channels, context cancellation, race detection, profiling, and resource management.
• Experience owning production services, diagnosing complex failures, and delivering well-tested fixes.
• Distributed-systems knowledge, including asynchronous messaging, retries, idempotency, state management, and partial failures.
• Practical security engineering: authentication, encrypted storage, sensitive-data handling, and safe logging.
• Applied cryptography concepts, including digital signatures, hashing, key management, and signature verification.
• Automated testing, CI/CD, Linux, containers, and production observability.
• Ability to understand an established codebase, make careful incremental changes, and explain technical decisions clearly.

Strongly Preferred / Desirable Technical Experience
• JavaScript/TypeScript SDKs and mobile bindings, including asynchronous APIs, packaging, compatibility, and Go/mobile interoperation.
• React Native/Expo, Swift, or Kotlin; experience with mobile lifecycle, secure storage, or native modules.
• MPC or threshold signatures, distributed key generation, and changes to signing participants.
Blockchain transaction signing, including signing payloads and chain-specific requirements.
• Confidential computing and hardware attestation, particularly AMD SEV-SNP, are especially valuable among the desirable skills.
• MQTT, Protocol Buffers, Prometheus, or Open Telemetry; familiarity with post-quantum signature schemes is also desirable for the longer-term roadmap.

Gensoft is looking for a Senior Go Engineer for a long-term client project: a Go service that orchestrates cryptographic signing between distributed participants, including mobile clients. The service is already running in early production, and we need an engineer who can take ownership of it and bring it to a robust production baseline.

ABOUT THE PROJECT

- A Go-based service that orchestrates cryptographic signing between distributed participants, including mobile clients. It integrates with multi-party signing libraries, supports encrypted storage and must recover safely from interrupted sessions and other failures.
- The service works and is at an early production stage. There are open pull requests, observability improvements and concurrency issues to address. Handover from the previous team may be limited.
- You will work with backend and mobile engineers, QA and cryptography specialists. Collaboration across UK and North American working hours is important.
- Stack: Go, Linux, Docker, shared SDKs and bindings for mobile and web platforms.
- Initial focus: understand the codebase, resolve reliability and security issues, improve tests and support releases. Later work may include new product features and longer-term cryptography roadmap items.

RESPONSIBILITIES

Core service engineering
- Maintain and improve the Go service: signing orchestration, communication between participants, encrypted storage and failure recovery.
- Investigate concurrency, timeouts, interrupted sessions, network failures and service restarts; review open pull requests and fix race conditions.
- Improve logging and observability, assess the existing implementation critically and make careful, maintainable changes.
- Contribute to new features and future cryptography work as the roadmap develops.

Cryptography, SDKs and cross-platform integration
- Maintain integrations with multi-party / threshold signing libraries, working with cryptography specialists where changes affect protocol security.
- Contribute to shared SDKs and bindings connecting Go with mobile and web clients.
- Work with backend and mobile engineers to preserve API compatibility and consistent behaviour across releases.

Quality, testing and operations
- Improve automated tests for signing correctness, failure recovery and interoperability between server and mobile components.
- Support Linux and Docker deployments, dependency upgrades, monitoring, release processes and operational documentation.
- Investigate production issues and occasionally help with customer setup or logging problems.

Ownership and technical judgement
- Take primary ownership of a security-critical codebase and independently establish a robust production baseline.
- Assess technical risks and trade-offs, explain decisions clearly and make incremental changes with sound security judgement.
- Collaborate pragmatically with backend, mobile, QA and cryptography specialists across time zones.

REQUIREMENTS

- Strong hands-on production experience with Go: goroutines, channels, context cancellation, race detection, profiling and resource management.
- Experience owning production services, diagnosing complex failures and delivering well-tested fixes.
- Distributed systems knowledge: asynchronous messaging, retries, idempotency, state management and partial failures.
- Practical security engineering: authentication, encrypted storage, sensitive data handling and safe logging.
- Applied cryptography concepts: digital signatures, hashing, key management and signature verification.
- Automated testing, CI/CD, Linux, containers and production observability.
- Ability to understand an established codebase, make careful incremental changes and explain technical decisions clearly.
- English at Upper-Intermediate level or higher.

NICE TO HAVE

- SDK development for JavaScript/TypeScript or mobile platforms (Swift, Kotlin), including asynchronous APIs, packaging and Go interoperability.
- Cross-platform mobile development, secure storage or native modules.
- MPC or threshold signatures, distributed key generation (DKG).
- Blockchain transaction signing.
- Confidential computing and hardware-based attestation.
- Messaging protocols, Protocol Buffers, Prometheus or OpenTelemetry; interest in emerging signature schemes.

WHO WILL BE A GOOD FIT

- Experience with digital asset infrastructure or MPC is valuable, but the priority is strong production Go and sound security judgement.
- Relevant experience in other security-critical distributed systems also counts.
- You do not need experience with every "nice to have" technology. Evidence of ownership, careful delivery and learning across platform boundaries matters more.
- You are independent and can get up to speed on an existing repository with limited handover.
- You pay attention to correctness and take a careful approach to critical systems.
- You can assess implementation choices critically and explain risks and trade-offs clearly.
- You are pragmatic and collaborative with backend, mobile and cryptography specialists.
- You are comfortable diagnosing production failures and improving reliability through tested changes.
- You communicate effectively in a remote setup and are flexible to overlap with UK and North American working hours.

WHAT WE OFFER

- Fully remote work.
- Real ownership of the codebase and influence on technical decisions.
- Work alongside strong backend and mobile engineers, QA and cryptography specialists.

We're looking for a senior Go engineer to take the lead on a transaction-signing service for a Western company building secure infrastructure for digital assets.

The service is the "server-side participant" in a multi-party signing flow: it co-signs transactions together with users' mobile devices using MPC / threshold cryptography, so no single party ever holds a full private key. The core is already built and running — your job is to own it, harden it and take it to a solid production level, and later help ship new features such as transaction approval policies and post-quantum signatures.

This is a hands-on ownership role, not a ticket-taking one. You'll get real autonomy and work alongside backend and mobile engineers, QA and a dedicated cryptographer.

What you'll be working on 

• Owning the Go signing service end to end: coordination between signing parties, encrypted key-share storage, safe recovery after crashes, timeouts and dropped sessions 

• Hunting down concurrency issues and race conditions, reviewing open PRs and bringing the codebase to a stable, well-tested state • Improving logging, metrics and tracing so failures are easy to understand in production 

• Keeping integrations with MPC / threshold-signature libraries in good shape together with the cryptographer 

• Contributing to the shared SDKs that expose the Go core to iOS, Android and JS/TS clients, and keeping APIs backward-compatible 

• Building test coverage for signing correctness, failure scenarios and server ↔ mobile interoperability 

• Supporting Docker/Linux deployments, releases, dependency updates and the occasional production or customer investigation

What we expect 

• Several years of commercial Go in production — you're confident with goroutines, channels, context, the race detector, pprof and resource management 

• A track record of owning a live service: debugging hard failures and shipping fixes backed by tests 

• Solid grasp of distributed systems — async messaging, retries, idempotency, state handling, partial failures 

• Security mindset in practice: authentication, encryption at rest, handling secrets and sensitive data, logging without leaking it 

• Working knowledge of applied cryptography: digital signatures, hashing, key management, signature verification 

• Comfort with CI/CD, automated testing, containers and observability tooling 

• Ability to pick up an existing codebase quickly, make careful incremental changes and explain your reasoning 

• English good enough for daily technical discussions with an international team

Big plus 

• MPC, TSS or distributed key generation (DKG) 

• Blockchain transaction signing on any chain 

• Confidential computing / TEEs and remote attestation (AMD SEV-SNP especially) 

• gomobile or other Go ↔ Swift/Kotlin bindings; TypeScript SDKs; React Native / Expo 

• MQTT, Protobuf, Prometheus, OpenTelemetry 

• Interest in post-quantum signature schemes

Terms 

• Full-time, 100% remote, long-term contract (6+ months, likely extension) 

• Start ASAP 

• Core hours 10:00–17:00 UK time; possible occasional later calls

• Your own laptop is fine

When you apply, it helps a lot if you add 

• A few words about Go services you've owned in production and your personal role there 

• An example of a tricky production or security incident you investigated and how you verified the fix 

• Your GitHub or any public code, if available 

• Your rate expectations, availability for interviews and earliest start date

Overview

We are looking for a Senior Engineer to take primary ownership of its Go-based Virtual Signer and help maintain shared signing SDKs and integrations across server and mobile platforms.
 

The Virtual Signer participates in MPC and threshold signing alongside mobile devices. This is an opportunity to take ownership of a security-critical component, strengthen its production reliability, and contribute to future transaction approval and post-quantum signature capabilities.

About the Environment:
The Go-based Virtual Signer orchestrates signing between server and mobile participants. It integrates with MPC and threshold-signature libraries, supports encrypted storage and must recover safely from interrupted signing sessions and other failures.

The component has been rebuilt over roughly the past year and is around MVP stage. It is working, with outstanding pull requests, logging and visibility improvements, and race conditions to address. The incoming engineer may have limited handover from the previous maintainer.

The engineer will work with backend and mobile engineers, testing support and a cryptographer who also maintains the repository. Collaboration across UK and Eastern Canada working hours will be important.

The environment includes Go, Linux and Docker, with shared SDKs and bindings for Swift, Kotlin and JavaScript/TypeScript. Jira, Slack, GitHub and Google Workspace are used for collaboration.

The initial focus is a robust production baseline: understand the codebase, resolve reliability and security issues, improve tests and support releases. Later work may include transaction approval functionality and post-quantum signing in collaboration with cryptography specialists.

Responsibilities:
Virtual Signer Engineering
— Maintain and improve the Go Virtual Signer, including signing orchestration, communication between participants, encrypted storage and recovery from failures.
— Investigate concurrency, timeouts, interrupted sessions, network failures and service restarts; review outstanding pull requests and address race conditions.
— Improve logging and visibility, assess the existing implementation critically and make careful, maintainable changes.
— Support agreed transaction approval features and future post-quantum signature work.
 

Cryptography, SDKs & Cross-Platform Integration
— Maintain integrations with MPC and threshold-signature libraries, working with cryptography specialists where changes affect protocol security.
— Contribute to shared SDKs and bindings connecting Go with Swift, Kotlin and JavaScript/TypeScript.
— Work with backend and mobile engineers to preserve API compatibility and consistent signing behaviour across releases.
 

Quality, Testing & Operations
— Improve automated tests for signing correctness, failure recovery and interoperability between virtual and mobile signers.
— Support Linux and Docker deployments, dependency upgrades, monitoring, release processes and operational documentation.
— Investigate production issues and occasionally assist with customer setup or logging problems.

Ownership & Technical Judgement
— Take primary ownership of a security-critical codebase with limited handover and independently establish a robust production baseline.
— Assess technical risks and trade-offs, explain decisions clearly and make incremental changes with sound security judgement.
— Collaborate pragmatically with backend, mobile, testing and cryptography specialists across time zone

Requirements:
Essential Technical Experience
— Strong hands-on production Go, including goroutines, channels, context cancellation, race detection, profiling and resource management.
— Experience owning production services, diagnosing complex failures and delivering well-tested fixes.
— Distributed-systems knowledge, including asynchronous messaging, retries, idempotency, state management and partial failures.
— Practical security engineering: authentication, encrypted storage, sensitive-data handling and safe logging.
— Applied cryptography concepts, including digital signatures, hashing, key management and signature verification.
— Automated testing, CI/CD, Linux, containers and production observability.
— Ability to understand an established codebase, make careful incremental changes and explain technical decisions clearly.

Strongly Preferred/Desirable Technical Experience
— JavaScript/TypeScript SDKs and mobile bindings, including asynchronous APIs, packaging, compatibility and Go/mobile interoperation.
— React Native/Expo, Swift or Kotlin; experience with mobile lifecycle, secure storage or native modules.
— MPC or threshold signatures, distributed key generation and changes to signing participants.
— Blockchain transaction signing, including signing payloads and chain-specific requirements.
— Confidential computing and hardware attestation, particularly AMD SEV-SNP, are especially valuable among the desirable skills.
— MQTT, Protocol Buffers, Prometheus or OpenTelemetry; familiarity with post-quantum signature schemes is also desirable for the longer-term roadmap.
 

Market Experience
— Experience with digital asset infrastructure, blockchain signing or MPC is valuable, but the priority is strong production Go and sound security judgement.
— Relevant experience in other security-critical distributed systems can also demonstrate fit.
— Candidates do not need experience with every desirable technology; evidence of ownership, careful delivery and learning across platform boundaries matters.

Soft Skills 
— Independent and able to understand an existing repository with limited handover.
— Strong security judgement, attention to correctness and a careful approach to critical signing systems.
— Able to assess implementation choices critically and explain risks and trade-offs clearly.
— Pragmatic and collaborative when working with backend, mobile and cryptography specialists.
— Comfortable diagnosing production failures and improving reliability through tested changes.
— Effective remote communication and flexibility for collaboration across UK and Eastern Canada working hours.
— Able to take ownership without relying on detailed instructions or extensive handover.
— Willing to investigate occasional customer setup or logging issues.

Assessment Process
Stage 1: CV screening.
Stage 2: First-stage technical interview (30 mins).
Stage 3: Technical Interview (1 hour) including pair-programming.
Stage 4: Cultural alignment review (30 mins).

Your future responsibilities:

• Own the architecture of the authorization platform end-to-end — from design through production operations
• Design and implement sidecar-based authorization mechanisms and policy enforcement engines
• Define authorization models (RBAC, ABAC, ReBAC) and translate business requirements into enforceable policies
• Drive technical decisions on authorization infrastructure — evaluate, select, and integrate tools (OpenFGA, OPA, SpiceDB, etc.)
• Design token exchange and delegation flows (OAuth 2.0 OBO, Keycloak token exchange) for multi-service authorization
• Collaborate with platform, security, and product teams to define access control policies and architectural standards
• Mentor and enable other engineering teams on secure authorization patterns and integration best practices
• Own CI/CD pipelines and infrastructure as code for authorization services — ensuring reliability, observability, and fast delivery
• Lead incident response for authorization-related issues — troubleshoot, resolve, and drive root-cause improvements
• Contribute to technical strategy — ADRs, RFCs, technical documentation, and knowledge sharing across teams
• Leverage AI tools and automation to accelerate development, reduce toil, and improve code quality

Your skills and experience:

• 5+ years of professional Golang development
• Expert-level understanding of Go concurrency patterns, interfaces, and idiomatic Go
• Deep knowledge of authorization models and systems (RBAC, ABAC, ReBAC, Zanzibar-style)
• Hands-on experience with policy engines (OPA/Rego, OpenFGA, or similar)
• Experience designing and operating sidecar-based authorization at scale
• Strong understanding of OAuth 2.0 / OIDC flows, token exchange, and identity federation (Keycloak or similar IdP)
• Experience with PostgreSQL and data modeling for access control
• Ability to design systems for high availability, low latency, and horizontal scalability
• Practical use of AI-assisted development tools (GitHub Copilot, Claude, Cursor, etc.
• Advanced Kubernetes experience (operators, CRDs, admission webhooks, troubleshooting at cluster level)
• Experience designing and maintaining CI/CD pipelines (GitHub Actions)
• Proficiency with ArgoCD for GitOps-based continuous delivery
• Experience authoring and managing Helm charts for complex deployments
• Infrastructure as code with Terraform/Terragrunt — including module design and state management
• Observability setup for authorization services (metrics, tracing, alerting)

Nice to Have

• Experience with Google Zanzibar-inspired systems (OpenFGA, SpiceDB, Authzed) in production
• Experience with service mesh (Istio/Envoy) and integrating authorization at the mesh layer
• Familiarity with MCP (Model Context Protocol) or/and agent-based architectures and their authorization challenges
• Background in platform engineering or developer experience
• Experience with security auditing, compliance standards, or regulated environments (banking/fintech)
• Experience designing multi-tenant authorization with delegation patterns
• Contributions to open-source authorization tooling
• Experience automating workflows with AI-powered tools or building internal developer tooling

We offer what matters most to you:

• Competitive salary: we guarantee a stable income and annual bonuses for your personal contribution. Additionally, we have a referral reward program for attracting new colleagues to Raiffeisen Bank
• Social package: official employment, 28 days of paid leave, additional “maternity leave” for fathers, and financial assistance for parents upon the birth of children
• Comfortable working conditions: the possibility of a hybrid work format, offices equipped with shelters and generators, provision with modern equipment
• Wellbeing program: all employees have access to medical insurance from the first working day; consultations with a psychologist, nutritionist or lawyer; discount program for sports and shopping; family days for children and adults; massage in the office
• Learning and development: access to over 130 online educational resources; corporate training programs, online library, mentoring program
• A great team: our colleagues are a community where curiosity, talent and innovation are welcomed. We support each other, learn together and grow. You can find like-minded people in over 15 professional communities, reading or sports clubs
• Career opportunities: we encourage advancement within the bank between functions
• Innovation and technology. Infrastructure: AWS, Kubernetes, Docker, GitHub, GitHub actions, ArgoCD, Prometheus, Victoria, Vault, OpenTelemetry, ElasticSearch, Crossplain, Grafana. Languages: Java (main), Python (data), Go (infra, security), Swift (IOS), Kotlin (Andorid)Datastores: Sql-Oracle, PgSql, MsSql, Sybase. Data management: Kafka, AirFlow, Spark, Flink, we develop expertise in AI and actively integrate it into processes
• Support program for defenders: we preserve jobs and pay the average salary to mobilized people. We have a support program for veterans, and the Bank’s veteran community is developing. We are working to raise awareness among managers and teams on the issues of veterans’ return to civilian life. Raiffeisen Bank is recognized as one of the best employers for veterans (Forbes)

______________________________________________________________________

Твої майбутні обов’язки: 

• Повний цикл володіння архітектурою платформи авторизації — від проєктування до підтримки в production
• Проєктування та реалізація sidecar-базованих механізмів авторизації та рушіїв застосування політик
• Визначення моделей авторизації (RBAC, ABAC, ReBAC) і трансформація бізнес-вимог у політики доступу
• Прийняття технічних рішень щодо інфраструктури авторизації — оцінка, вибір та інтеграція інструментів (OpenFGA, OPA, SpiceDB тощо)
• Проєктування потоків обміну токенами та делегування доступу (OAuth 2.0 OBO, Keycloak token exchange) для авторизації між сервісами
• Співпраця з платформеними, security- та product-командами для визначення політик контролю доступу й архітектурних стандартів
• Менторинг інших engineering-команд щодо безпечних патернів авторизації та найкращих практик інтеграції
• Підтримка CI/CD-пайплайнів та infrastructure as code для сервісів авторизації — забезпечення надійності, observability і швидкої доставки змін
• Участь у реагуванні на інциденти, пов’язані з авторизацією — пошук і усунення проблем та аналіз root cause
• Внесок у технічну стратегію — ADR, RFC, технічна документація та обмін знаннями між командами
• Використання AI-інструментів та автоматизації для прискорення розробки, зменшення рутини та покращення якості коду

Твій досвід та навички:

• 5+ років професійної розробки на Golang
• Експертне розуміння concurrency patterns, interfaces та idiomatic Go
• Глибокі знання моделей та систем авторизації (RBAC, ABAC, ReBAC, Zanzibar-style)
• Практичний досвід роботи з policy engines (OPA/Rego, OpenFGA або аналогічними)
• Досвід проєктування та експлуатації sidecar-based authorization у масштабованих системах
• Сильне розуміння OAuth 2.0 / OIDC flows, token exchange та identity federation (Keycloak або інший IdP)
• Досвід роботи з PostgreSQL та моделюванням даних для систем контролю доступу
• Вміння проєктувати системи з високою доступністю, низькою затримкою та горизонтальним масштабуванням
• Практичний досвід використання AI-assisted development tools (GitHub Copilot, Claude, Cursor тощо)
• Просунутий досвід роботи з Kubernetes (operators, CRDs, admission webhooks, troubleshooting на рівні кластера)
• Досвід створення та підтримки CI/CD-пайплайнів (GitHub Actions)
• Впевнене використання ArgoCD для GitOps-based continuous delivery
• Досвід написання та підтримки Helm charts для складних деплойментів
• Infrastructure as code з Terraform/Terragrunt — включно з дизайном модулів і керуванням state
• Налаштування observability для сервісів авторизації (метрики, tracing, alerting)

Буде плюсом:

• Досвід роботи з системами на основі Google Zanzibar (OpenFGA, SpiceDB, Authzed) у production
• Досвід роботи із service mesh (Istio/Envoy) та інтеграції авторизації на рівні mesh
• Знайомство з MCP (Model Context Protocol) та/або agent-based architectures і пов’язаними викликами авторизації
• Досвід у platform engineering або developer experience
• Досвід security auditing, роботи з compliance standards або регульованими середовищами (banking/fintech)
• Досвід проєктування multi-tenant authorization із delegation patterns
• Внесок у open-source інструменти авторизації
• Досвід автоматизації workflow за допомогою AI-powered tools або створення внутрішніх developer tools

Пропонуємо те, що має значення саме для тебе: 

• Конкурентна заробітна плата: гарантуємо стабільний дохід та річні бонуси за твій особистий внесок. Додатково, у нас діє реферальна програма винагороди за залучення нових колег до Райффайзен Банку
• Соціальний пакет: офіційне працевлаштування, 28 днів оплачуваної відпустки, додатковий “декрет” для татусів, та матеріальна допомога для батьків при народженні дітей
• Комфортні умови праці: можливість гібридного формату роботи, офіси забезпеченні укриттями та генераторами, забезпечення сучасною технікою
• Wellbeing програма: для всіх співробітників доступні медичне страхування з першого робочого дня; консультації психолога, нутриціолога чи юриста; дисконт програми на спорт та покупки; family days для дітей та дорослих; масаж в офісі
• Навчання та розвиток: доступ до понад 130 навчальних онлайн-ресурсів; корпоративні навчальні програми, онлайн бібліотека, програма менторства
• Крута команда: наші колеги — це спільнота, де вітаються допитливість, талант та інновації. Ми підтримуємо один одного, вчимося разом та зростаємо. Ти можеш знайти однодумців у понад 15-ти професійних ком’юніті, читацькому чи спортивному клубах
• Кар’єрні можливості: ми заохочуємо просування всередині банку між функціями
• Інновації та технології. Infrastructure: AWS, Kubernetes, Docker, GitHub, GitHub actions, ArgoCD, Prometheus, Victoria, Vault, OpenTelemetry, ElasticSearch, Crossplain, Grafana. Languages: Java (main), Python (data), Go(infra,security), Swift (IOS), Kotlin (Andorid) Datastores: Sql-Oracle, PgSql, MsSql, Sybase. Data management: Kafka, AirFlow, Spark, Flink, розвиваємо експертизу в AI та активно інтегруємо в процеси
• Програма підтримки захисників і захисниць: ми зберігаємо робочі місця та виплачуємо середню заробітну плату мобілізованим. Для ветеранів та ветеранок у нас діє програма підтримки, розвивається ветеранська спільнота Банку. Ми працюємо над підвищенням обізнаності керівників та команд з питань повернення ветеранів до цивільного життя. Райффайзен Банк відзначений як один з найкращих роботодавців для ветеранів (Forbes)

We are looking for Backend/Golang Developers to join our team.

You will be responsible for building and evolving a high-performance backend platform that powers real-time, user-facing applications in a scalable and reliable microservices environment.

Key Responsibilities:

• Build a cutting-edge real-time cross-selling platform;
• Take ownership of the backend that powers multiple user-facing apps, advancing our state-of-the-art gRPC-based microservice architecture;
• Actively participate in code reviews to ensure that our platform and codebase meet the highest quality standards;
• Take a proactive role in all aspects of platform design and development, with a strong emphasis on scalability and availability.

Bring to the team:

• Solid experience with gRPC, REST API, and Backend testing;
• Strong familiarity with Agile methodologies, fostering collaboration, and adaptability;
• Experience in a Tech Lead/Team Lead role or similar positions;
• Excellent communication and problem-solving skills;
• Experience building Go applications with a focus on resilience and uptime;
• Fluent business English.

We offer:

• Maximum flexibility;
• Professional trainings, conferences and certifications;
• Corporate events and benefits;
• Professional literature;
• English courses.

Join our Revenue Management engineering team and take ownership of the software that powers pricing decisions for every SIXT vehicle, worldwide. Our back office platform enables Pricing Managers to configure rates for both B2C and B2B customers and serves as a critical backbone for a range of internal business operations. The current system is built on a legacy codebase and your primary mission will be to reimagine and rebuild it from the ground up. This is a rare greenfield opportunity to architect a replacement for a core, mission-critical platform that directly shapes the prices millions of customers see across the globe.

What You’ll Do:

• Build and maintain scalable services and integrations
• Design solutions to solve complex problems in legacy and data-intensive systems
• Write clean, tested code and perform code reviews
• Own your services: “You build it, you run it.”
• Collaborate with Product Owners and stakeholders

Must-Have Skills:

• 4-5 years experience with Go, PHP.
• Strong OOP, design patterns, and experience with working with legacy code
• Strong SQL skills (with PostgreSQL, Oracle)
• Unit & integration testing, familiarity with XML, JSON, YAML
• Version control: Git.
• Agentic coding experience
• Upper-Intermediate English.
 

Nice-to-Have:

• Symfony, frontend frameworks (React, ExtJS, jQuery)
• Microservices, goMicro, REST/gRPC APIs, message brokers (Kafka, RabbitMQ)
• Cloud Experience, Docker, Kubernetes, observability tools (Prometheus, Grafana, Instana)
• Exposure to AI/ML tools and frameworks for data-intensive applications.
• Performance optimization and load testing.
• Security/authentication: OAuth2, JWT, Keycloak
 

What we offer:

• Competitive high salary (pegged to EUR)
• Full-time employment as an internal employee of SIXT TECH Ukraine
• Relocation compensation
• People-oriented management with minimal bureaucracy
• A challenging role where you can learn, grow, and influence architecture and processes
• 25 calendar days of paid vacation
• Educational budget for courses, conferences, and certifications
Medical insurance
• Co-funding (50%) for gym and foreign language classes

If you want to work with modern data tech, real business impact, and a global product at scale — we’d love to hear from you.

We are hiring a Senior Backend Engineer (Identity & Access Management) for a project building a scalable distributed platform and delivering reliable backend solutions. 

Our customer is an international organization operating in the financial and protection services domain. The company provides a diverse portfolio of customer-oriented solutions across multiple business areas and markets. With a strong focus on digital capabilities, operational excellence, and long-term development, the organization continuously invests in technology, process improvement, and service innovation to support evolving customer and business needs. 

The project focuses on building and evolving a high-performance, scalable distributed platform designed to support complex business operations and rapid product growth. The system is developed in Go, with a strong emphasis on efficient concurrency models, reliability, and long-term maintainability. 

Responsibilities: 

- Designing, developing, and operating high-throughput, low-latency identity services: Single Sign-On (SSO), Multi-Factor Authentication (MFA), session management, and federation. 

- Owning features end-to-end from design through production and support. 

- Implementing and scaling modern authentication and authorization protocols and token formats (OAuth 2.0, OpenID Connect, JWTs), including secure token issuance, rotation, and revocation strategies. 

- Writing clean, concurrent, and highly performant backend services primarily in Go. 

- Designing idiomatic, testable code and clear API contracts (gRPC/HTTP). 

- Using DevOps experience to deploy, manage, and automate identity infrastructure (CI/CD, monitoring, and incident response). 

- Serving as the subject matter expert on authentication and identity: owning internal security reviews, threating modeling for identity flows, and guiding other teams on secure integrations with the platform. 

- Integrating and maintaining solutions with custom and standard identity providers (e.g. Keycloak and AWS Cognito), and federation patterns. 

- Mentoring engineers, conducting design reviews, and contributing to the team's technical roadmap and security posture. 

Must-haves: 

- Experience in backend engineering for 7+ years, including 5+ years with Go. 

- Experience working with IAM in production environments. 

- Strong production experience with Go and gRPC, building complex, distributed backend systems. 

- Deep expertise in authentication and authorization, including OAuth 2.0, OIDC, SSO, MFA, RBAC, JWT signing/verification/assertions, token security, session management, and cryptography.  

- Strong understanding of web security, federated identity, secure coding, and OWASP Top 10.  

- Hands-on experience with cloud platforms (AWS preferred), container orchestration (Kubernetes), and Infrastructure as Code (Terraform, Terragrunt and OpenTofu/Tofu). 

- Experience designing high-throughput, low-latency systems with a focus on security and correctness. 

- Strong communication skills and ability to explain security and architecture trade-offs to technical and non-technical stakeholders. 

- Level of English – from Upper-Intermediate and above. 

Nice-to-haves: 

- Experience with SAML, SCIM, PKI, JWKs/JWKS endpoints, key management (KMS/HSM) and token introspection. 

- Working knowledge of identity platforms (commercial or open source), rate limiting, abuse mitigation, and adaptive authentication. 

Required skills:
• Go, microservice architecture, PostgreSQL, Kafka
• REST and gRPC, mTLS integrations
• Kubernetes and ArgoCD at a confident operational level
• Hands-on experience integrating with external and legacy systems (Core Banking Systems (ABS), document management systems, state/government services)

Project:
Digital Banking for Corporate Clients and Sole Proprietors.

• Domain: SME Lending: digital credit pipeline in mobile app and web environments
• Phase Goal: Close the loop on the end-to-end digital loan issuance process. Currently, clients apply and receive credit decisions directly in the app, but must visit a branch to sign credit and collateral agreements.
• Scope of Work: Integration of the signing process with the core accounting/ledger system – E-signing of consents by individual founders operating outside the bank's client ecosystem – Development and design of the factoring process

• Methodology: SAFe, PI planning horizon (5 two-week iterations)

• Team: Distributed, working language — Russian